10-Q

U.S. SECURTIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

Form 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2018

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from              to

Commission file number 000-32017

CENTERSTATE BANK CORPORATION

(Exact Name of Registrant as Specified in Its Charter)

Florida	59-3606741
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

1101 First Street South, Suite 202

Winter Haven, Florida 33880

(Address of Principal Executive Offices)

(863) 293-4710

(Issuer’s Telephone Number, Including Area Code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Small reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

State the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date:

	Common stock, par value $.01 per share		95,654,854 shares
(class)		Outstanding at October 30, 2018

CENTERSTATE BANK CORPORATION AND SUBSIDIARIES

INDEX

	Page
PART I. FINANCIAL INFORMATION
Item 1. Financial Statements
Condensed consolidated balance sheets (unaudited) at September 30, 2018 and December 31, 2017	3
Condensed consolidated statements of income and comprehensive income for the three and nine months ended September 30, 2018 and 2017 (unaudited)	4
Condensed consolidated statements of changes in stockholders’ equity for the three and nine months ended September 30, 2018 and 2017 (unaudited)	6
Condensed consolidated statements of cash flows for the nine months ended September 30, 2018 and 2017 (unaudited)	8
Notes to condensed consolidated financial statements (unaudited)	10
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	52
Item 3. Quantitative and Qualitative Disclosures About Market Risk	74
Item 4. Controls and Procedures	74
PART II. OTHER INFORMATION
Item 1. Legal Proceedings	75
Item 1A. Risk Factors	75
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	75
Item 3. Defaults Upon Senior Securities	75
Item 4. [Removed and Reserved]	75
Item 5. Other Information	75
Item 6. Exhibits	76
SIGNATURES	77
CERTIFICATIONS

2

CenterState Bank Corporation and Subsidiaries

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited)

(in thousands of dollars, except per share data)

	September 30, 2018			December 31, 2017
ASSETS
Cash and due from banks	$	112,943		$	68,571
Deposits in other financial institutions (restricted cash)		5,236			16,991
Federal funds sold and Federal Reserve Bank deposits		488,152			195,057
Cash and cash equivalents		606,331			280,619
Trading securities, at fair value		—			6,777
Investment securities available for sale, at fair value		1,536,842			1,060,143
Investment securities held to maturity (fair value of $211,262 and $231,615
at September 30, 2018 and December 31, 2017, respectively)		219,850			232,399
Loans held for sale (see Note 7)		39,554			19,647
Loans, excluding purchased credit impaired		8,055,421			4,609,063
Purchased credit impaired loans		167,671			164,158
Allowance for loan losses		(38,811	)		(32,825	)
Net Loans		8,184,281			4,740,396
Bank premises and equipment, net		224,506			141,886
Accrued interest receivable		32,972			18,628
Federal Home Loan Bank, Federal Reserve Bank and other stock, at cost		70,311			34,876
Goodwill		802,880			257,683
Core deposit intangible, net		69,133			24,063
Other intangible assets, net		2,925			551
Bank owned life insurance		267,979			146,739
Other repossessed real estate owned		4,643			3,987
Deferred income tax asset, net		60,839			37,725
Bank property held for sale		27,081			11,354
Interest rate swap derivatives, at fair value		87,946			42,480
Prepaid expense and other assets		36,292			64,022
TOTAL ASSETS	$	12,274,365		$	7,123,975
LIABILITIES AND STOCKHOLDERS' EQUITY
Deposits:
Demand - non-interest bearing	$	3,094,652		$	1,999,901
Demand - interest bearing		1,702,467			1,058,985
Savings and money market accounts		2,815,119			1,668,954
Time deposits		1,862,288			832,683
Total deposits		9,474,526			5,560,523
Securities sold under agreement to repurchase		51,311			52,080
Federal funds purchased		272,002			331,490
Other borrowed funds		371,000			175,000
Corporate debentures		41,328			26,192
Accrued interest payable		2,570			1,169
Interest rate swap derivatives, at fair value		88,065			43,259
Payables and accrued expenses		60,404			29,512
Total liabilities		10,361,206			6,219,225
Stockholders' equity:
Common stock, $.01 par value: 200,000,000 shares
authorized; 95,636,051 and 60,161,334  shares issued and outstanding
at September, 2018 and December 31, 2017, respectively		956			602
Additional paid-in capital		1,697,396			737,905
Retained earnings		252,695			173,248
Accumulated other comprehensive loss		(37,888	)		(7,005	)
Total stockholders' equity		1,913,159			904,750
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$	12,274,365		$	7,123,975

See notes to the accompanying condensed consolidated financial statements

3

CenterState Bank Corporation and Subsidiaries

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (unaudited)

(in thousands of dollars, except per share data)

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018			2017
Interest income:
Loans	$	101,555	$	59,122	$	289,127		$	159,990
Investment securities:
Taxable		10,145		5,648		30,888			16,622
Tax-exempt		1,601		1,400		4,718			3,918
Federal funds sold and other		1,362		887		3,718			2,374
		114,663		67,057		328,451			182,904
Interest expense:
Deposits		9,096		3,178		20,900			7,694
Securities sold under agreement to repurchase		169		80		429			157
Federal funds purchased and other borrowings		2,966		866		8,156			2,131
Corporate debentures		579		347		1,566			998
		12,810		4,471		31,051			10,980
Net interest income		101,853		62,586		297,400			171,924
Provision for loan losses		1,950		1,096		6,183			3,990
Net interest income after loan loss provision		99,903		61,490		291,217			167,934
Non interest income:
Correspondent banking capital markets revenue		7,258		5,823		20,156			18,067
Other correspondent banking related  revenue		1,038		1,390		3,339			3,658
Mortgage banking income		3,188		404		8,406			932
SBA income		1,020		249		3,035			442
Service charges on deposit accounts		5,787		3,870		15,482			11,267
Debit, prepaid, ATM and merchant card related fees		3,869		2,127		11,094			6,716
Wealth management related revenue		676		914		1,932			2,698
Bank owned life insurance income		1,490		975		4,258			2,310
Other non interest income		2,778		989		5,051			2,127
Net loss on sale of securities available for sale		—		—		(22	)		—
Total other income		27,104		16,741		72,731			48,217

See notes to the accompanying condensed consolidated financial statements.

4

CenterState Bank Corporation and Subsidiaries

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (unaudited)

(in thousands of dollars, except per share data)

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Non interest expense:
Salaries, wages and employee benefits		41,698			28,515			124,274			79,714
Occupancy expense		5,428			3,422			15,264			9,453
Depreciation of premises and equipment		2,439			1,842			7,036			5,363
Supplies, stationary and printing		588			392			1,682			1,180
Marketing expenses		1,493			955			4,332			2,885
Data processing expense		2,729			2,006			10,687			6,251
Legal, audit and other professional fees		1,301			854			3,564			2,674
Amortization of intangibles		2,480			1,133			7,029			2,937
Postage and delivery		711			512			2,145			1,431
ATM and debit card related expenses		972			746			2,596			2,102
Bank regulatory expenses		1,367			666			3,586			2,284
Gain on sale of repossessed real estate (“OREO”)		(294	)		(38	)		(1,193	)		(200	)
Valuation write down of repossessed real estate (“OREO”)		170			141			464			612
(Gain) loss on repossessed assets other than real estate		(9	)		(13	)		10			(19	)
Foreclosure related expenses		821			437			2,056			1,665
Merger related expenses		10,395			—			33,244			10,328
Impairment on bank property held for sale		247			—			2,587			507
Other expenses		4,803			3,052			13,584			8,307
Total other expenses		77,339			44,622			232,947			137,474
Income before provision for income taxes		49,668			33,609			131,001			78,677
Provision for income taxes		11,683			11,559			25,217			24,794
Net income	$	37,985		$	22,050		$	105,784		$	53,883
Other comprehensive (loss) income, net of tax:
Unrealized securities holding (loss) gain, net of income taxes      of ($1,979), ($389), ($9,950) and $5,210, respectively	$	(7,354	)	$	(620	)	$	(30,899	)	$	8,296
Less: reclassified adjustments for loss included in net income,      net of income taxes of $0, $0, ($6) and $0, respectively		—			—			16			—
Net unrealized (loss) gain on available for sale securities,     net of income taxes	$	(7,354	)	$	(620	)	$	(30,883	)	$	8,296
Total comprehensive income	$	30,631		$	21,430		$	74,901		$	62,179
Earnings per share:
Basic	$	0.43		$	0.37		$	1.24		$	0.95
Diluted	$	0.43		$	0.36		$	1.23		$	0.94
Common shares used in the calculation of earnings per share:
Basic (1)		87,813,671			59,906,610			84,958,277			56,315,700
Diluted (1)		88,810,702			61,115,005			86,209,709			57,330,267

(1) Excludes participating shares.

See notes to the accompanying condensed consolidated financial statements

5

CenterState Bank Corporation and Subsidiaries

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

For the three months ended September 30, 2018 and 2017 (unaudited)

(in thousands of dollars, except per share data)

												Accumulated
	Number of					Additional						other			Total
	common			Common		paid in			Retained			comprehensive			stockholders'
	shares			stock		capital			earnings			income (loss)			equity
Balances at July 1, 2017		60,002,604		$	600	$	734,059		$	155,257		$	342		$	890,258
Net income										22,050						22,050
Unrealized holding loss on
available for sale securities, net of
deferred income tax of $389													(620	)		(620	)
Dividends paid - common ($0.12 per share)										(3,603	)					(3,603	)
Stock grants issued		22,641			—		183									183
Stock based compensation expense							1,080									1,080
Stock options exercised		29,319			1		303									304
Stock repurchase		(1,172	)		—		(30	)								(30	)
Balances at September 30, 2017		60,053,392		$	601	$	735,595		$	173,704		$	(278	)	$	909,622
Balances at July 1, 2018		84,120,421		$	841	$	1,345,671		$	224,270		$	(30,534	)	$	1,540,248
Net income										37,985						37,985
Unrealized holding loss on
available for sale securities, net of
deferred income tax of $1,979													(7,354	)		(7,354	)
Dividends paid - common ($0.10 per share)										(9,560	)					(9,560	)
Stock grants issued		40,370			—		650									650
Stock based compensation expense					—		1,012									1,012
Stock options exercised		52,036			1		397									398
Stock repurchase		(990	)		—		(29	)								(29	)
Stock issued pursuant to Charter acquisition		11,424,214			114		349,695									349,809
Balances at September 30, 2018		95,636,051		$	956	$	1,697,396		$	252,695		$	(37,888	)	$	1,913,159

6

CenterState Bank Corporation and Subsidiaries

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

For the nine months ended September 30, 2018 and 2017 (unaudited)

(in thousands of dollars, except per share data)

													Accumulated
	Number of						Additional						other			Total
	common			Common			paid in			Retained			comprehensive			stockholders'
	shares			stock			capital			earnings			income (loss)			equity
Balances at January 1, 2017		48,146,981		$	482		$	430,459		$	130,090		$	(8,574	)	$	552,457
Net income											53,883						53,883
Unrealized holding gain on
available for sale securities, net of
deferred income tax of $5,210														8,296			8,296
Dividends paid - common ($0.18 per share)											(10,269	)					(10,269	)
Stock grants issued		240,075			2			401									403
Stock based compensation expense								3,333									3,333
Stock options exercised		479,864			5			5,308									5,313
Stock repurchase		(32,224	)		(1	)		(786	)								(787	)
Stock issued pursuant to Platinum Bank acquisition		4,279,255			43			110,790									110,833
Stock issued pursuant to Gateway Bank acquisition		4,244,441			43			107,044									107,087
Stock options acquired and converted    pursuant to Gateway Bank acquisition								15,811									15,811
Stock issued pursuant to public offering, net of costs of $529		2,695,000			27			63,235									63,262
Balances at September 30, 2017		60,053,392		$	601		$	735,595		$	173,704		$	(278	)	$	909,622
Balances at January 1, 2018		60,161,334		$	602		$	737,905		$	173,248		$	(7,005	)	$	904,750
Net income											105,784						105,784
Unrealized holding loss on
available for sale securities, net of
deferred income tax of $9,966														(30,883	)		(30,883	)
Dividends paid - common ($0.30 per share)											(26,337	)					(26,337	)
Stock grants issued		235,521			2			648									650
Stock based compensation expense								3,012									3,012
Stock options exercised		1,751,194			18			14,234									14,252
Stock repurchase		(38,496	)		(1	)		(1,026	)								(1,027	)
Stock issued pursuant to Sunshine acquisition		7,050,645			70			181,343									181,413
Stock options acquired and converted    pursuant to Sunshine acquisition								6,432									6,432
Stock issued pursuant to HCBF acquisition		15,051,639			151			387,128									387,279
Stock options acquired and converted    pursuant to HCBF acquisition								18,025									18,025
Stock issued pursuant to Charter acquisition		11,424,214			114			349,695									349,809
Balances at September 30, 2018		95,636,051		$	956		$	1,697,396		$	252,695		$	(37,888	)	$	1,913,159

See notes to the accompanying condensed consolidated financial statements

7

CenterState Bank Corporation and Subsidiaries

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)

(in thousands of dollars, except per share data)

	Nine months ended September 30,
	2018			2017
Cash flows from operating activities:
Net income	$	105,784		$	53,883
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		6,183			3,990
Depreciation of premises and equipment		7,036			5,363
Accretion of purchase accounting adjustments		(37,725	)		(26,653	)
Net amortization of investment securities		9,713			7,389
Net deferred loan origination fees		1,277			314
Loss on sale of securities available for sale		22			—
Trading securities revenue		(12	)		(192	)
Purchases of trading securities		(234,190	)		(186,523	)
Proceeds from sale of trading securities		240,979			196,125
Repossessed real estate owned valuation write down		464			612
Gain on sale of repossessed real estate owned		(1,193	)		(200	)
Loss (gain) on repossessed assets other than real estate		10			(19	)
Gain on sale of residential loans held for sale		(6,612	)		(932	)
Residential loans originated and held for sale		(242,226	)		(53,806	)
Proceeds from sale of residential loans held for sale		238,613			44,780
Change in fair value of residential loans held for sale		(723	)		—
Gain on disposal of and or sale of fixed assets		(762	)		(217	)
Gain on disposal of bank property held for sale		(1,745	)		(304	)
Impairment on bank property held for sale		2,587			507
Gain on sale of small business administration loans		(3,035	)		(442	)
Small business administration loans originated for sale		(29,448	)		(6,623	)
Proceeds from sale of small business administration loans		32,483			7,065
Gain on sale of deposits		(611	)		—
Deferred income taxes		14,559			10,018
Tax deduction in excess of book deduction for stock awards		(6,017	)		(2,407	)
Stock based compensation expense		3,012			3,333
Bank owned life insurance income		(4,258	)		(2,310	)
Net cash from changes in:
Net changes in accrued interest receivable, prepaid expenses, and other assets		56,911			5,447
Net change in accrued interest payable, accrued expense, and other liabilities		2,509			7,973
Net cash provided by operating activities	$	153,585		$	66,171

See notes to the accompanying condensed consolidated financial statements.

8

CenterState Bank Corporation and Subsidiaries

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)

(in thousands of dollars, except per share data)

(continued)

	Nine months ended September 30,
	2018			2017
Cash flows from investing activities:
Available for sale securities:
Purchases of investment securities	$	(94,602	)	$	(46,472	)
Purchases of mortgage backed securities		(290,645	)		(165,347	)
Proceeds from pay-downs of mortgage backed securities		161,779			91,530
Proceeds from sales of investment securities		58,768			104,260
Proceeds from sales of mortgage backed securities		305,384			156,564
Proceeds from called investment securities		1,045			710
Proceeds from maturities of investment securities		61,000			1,000
Held to maturity securities:
Purchases of investment securities		—			(2,693	)
Purchases of mortgage backed securities		—			(1,695	)
Proceeds from pay-downs of mortgage backed securities		11,513			15,797
Purchases of FHLB and FRB stock		(17,398	)		(9,304	)
Proceeds from sales of FHLB and FRB stock		20,944			5,572
Net increase in loans		(259,358	)		(202,434	)
Purchases of premises and equipment, net		(17,525	)		(8,124	)
Proceeds from sale of repossessed real estate		9,201			3,794
Proceeds from sale of fixed assets		2,661			548
Proceeds from sale of bank property held for sale		12,350			6,413
Purchase of bank owned life insurance		—			(30,000	)
Net cash from bank acquisitions		229,689			86,530
Net cash provided by investing activities	$	194,806		$	6,649
Cash flows from financing activities:
Net increase in deposits		93,831			45,367
Sale of deposits		25,341			—
Net (decrease) increase in securities sold under agreement to repurchase		(1,122	)		12,104
Net (decrease) increase in federal funds purchased		(59,488	)		73,545
Net decrease in other borrowings		(67,920	)		(134,732	)
Net decrease in payable to shareholders for acquisitions		(209	)		(48	)
Stock options exercised		14,252			5,313
Proceeds from stock offering, net of offering costs		—			63,262
Stock repurchased		(1,027	)		(787	)
Dividends paid		(26,337	)		(10,269	)
Net cash (used in) provided by financing activities	$	(22,679	)	$	53,755
Net increase in cash and cash equivalents		325,712			126,575
Cash and cash equivalents, beginning of period		280,619			175,654
Cash and cash equivalents, end of period	$	606,331		$	302,229
Transfer of loans to other real estate owned	$	3,727		$	2,614
Transfers of bank property to held for sale	$	3,502		$	4,136
Cash paid during the period for:
Interest	$	31,655		$	12,323
Income taxes	$	11,299		$	8,893

See notes to the accompanying condensed consolidated financial statements.

9

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

NOTE 1: Nature of operations and basis of presentation

The consolidated financial statements include the accounts of CenterState Bank Corporation (the “Parent Company,” “Company” or “CSFL”), and its wholly owned subsidiary bank, CenterState Bank, N.A. (“CenterState” or “Bank”), and non-bank subsidiaries, R4ALL, Inc. and CSFL Insurance Corp. The Company operates as one of the largest community bank franchises headquartered in the state of Florida. The Bank provides traditional retail, commercial, mortgage, wealth management and SBA services throughout its Florida, Georgia and Alabama branch network and customer relationships in neighboring states.    

The Bank also operates a correspondent banking and capital markets division headquartered in Winter Haven, Florida, although the majority of its bond salesmen, traders and operational personnel are physically housed in leased facilities located in Birmingham, Alabama and Atlanta, Georgia. This division’s primary revenue generating activities are related to its capital markets division, which includes commissions earned on fixed income security sales, fees from hedging services, loan brokerage fees and consulting fees for services related to these activities; and its correspondent banking division, which includes spread income earned on correspondent bank deposits (i.e. federal funds purchased) and correspondent bank checking account deposits and fees from safe-keeping activities, bond accounting services for correspondents, asset/liability consulting related activities, international wires, and other clearing and corporate checking account services. The customer base includes small to medium size financial institutions primarily located in the Southeastern United States.

R4ALL, Inc. purchases troubled loans from the Bank and manages their eventual disposition.  CSFL Insurance Corp. is a captive insurance subsidiary pursuant to Section 831(b) of the U.S. Tax Code.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial statements and with the instructions to Form 10-Q. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. These statements should be read in conjunction with the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2017. In the Company’s opinion, all adjustments, consisting primarily of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods have been made. The results of operations of the three and nine month periods ended September 30, 2018 are not necessarily indicative of the results expected for the full year.

Some items in the prior period financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior period net income or shareholders’ equity.

10

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

NOTE 2: Common stock outstanding and earnings per share data

The two-class method is used in the calculation of basic and diluted earnings per share.  Under the two-class method, earnings available to common shareholders for the period are allocated between common shareholders and participating securities according to dividends declared (or accumulated) and participation rights in undistributed earnings.  There were 0 anti-dilutive stock options for the three and nine month periods ending September 30, 2018 and 2017.  The following table presents the factors used in the earnings per share computations for the periods indicated.

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Basic
Net income available to common shareholders	$	37,985		$	22,050		$	105,784		$	53,883
Less: Earnings allocated to participating securities		(28	)		(46	)		(84	)		(121	)
Net income allocated to common shareholders	$	37,957		$	22,004		$	105,700		$	53,762
Weighted average common shares outstanding
including participating securities		87,881,806			60,032,804			85,026,929			56,442,506
Less: Participating securities (1)		(68,135	)		(126,194	)		(68,652	)		(126,806	)
Average shares		87,813,671			59,906,610			84,958,277			56,315,700
Basic earnings per common share	$	0.43		$	0.37		$	1.24		$	0.95
Diluted
Net income available to common shareholders	$	37,957		$	22,004		$	105,700		$	53,762
Weighted average common shares outstanding for
basic earnings per common share		87,813,671			59,906,610			84,958,277			56,315,700
Add: Dilutive effects of stock based compensation awards		997,031			1,208,395			1,251,432			1,014,567
Average shares and dilutive potential common shares		88,810,702			61,115,005			86,209,709			57,330,267
Diluted earnings per common share	$	0.43		$	0.36		$	1.23		$	0.94

1. Participating securities are restricted stock awards whereby the stock certificates have been issued, are included in outstanding shares, receive dividends and can be voted, but have not vested.   

NOTE 3: Fair value

Generally accepted accounting principles establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.

Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing and asset or liability.

The fair values of securities available for sale, excluding corporate debt securities, are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The fair values of corporate debt securities are calculated using market indicators such as broker quotes (Level 2).

The fair values of trading securities are determined as follows: (1) for those securities that have traded prior to the date of the consolidated balance sheet but have not settled (date of sale) until after such date, the sales price is used as the fair value (Level 1); and, (2) for those securities which have not traded as of the date of the consolidated balance sheet, the fair value was determined by broker price indications of similar or same securities (Level 2).

11

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

For periods prior to December 31, 2017, mortgage loans held for sale were valued at the lower of cost or fair value.  Effective January 1, 2018, the Company elected to account for these loans under the fair value option with changes in fair value recognized in current period earnings.  These loans are intended for sale and the Company believes that the fair value is the best indicator of the resolution of these loans (Level 2).  In conjunction with the fair value election on loans held for sale, Mortgage banking uses derivative forward sales contracts and interest rate lock commitments on residential mortgage loans.  Fair values of these mortgage derivatives are estimated based on changes in mortgage interest rates from the date the interest on the loan is locked (Level 3).  

The fair value of interest rate swap derivatives is based on valuation models using observable market data as of the measurement date (Level 2). The derivatives are traded in an over-the-counter market where quoted market prices are not always available. Therefore, fair values of derivatives are determined using quantitative models that utilize multiple market inputs. The inputs will vary based on the type of derivative, but could include interest rates, prices and indices to generate continuous yield or pricing curves, prepayment rates, and volatility factors to value the position. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services.

Assets and liabilities measured at fair value on a recurring basis are summarized below.

			Fair value measurements using
			Quoted prices	Significant
			in active	other		Significant
			markets for	observable		unobservable
	Carrying		identical assets	inputs		inputs
	value		(Level 1)	(Level 2)		(Level 3)
at September 30, 2018
Assets:
Available for sale securities
Corporate debt securities	$	6,361	—	$	6,361	—
Obligations of U.S. government sponsored entities and agencies		39,644	—		39,644	—
Mortgage backed securities		1,412,459	—		1,412,459	—
Municipal securities		78,378	—		78,378	—
Loans held for sale, at fair value		39,554	—		39,554	—
Mortgage banking derivatives		938	—	—			938
Interest rate swap derivatives		87,946	—		87,946	—
Liabilities:
Mortgage banking derivatives		27	—	—			27
Interest rate swap derivatives		88,065	—		88,065	—
at December 31, 2017
Assets:
Trading securities	$	6,777	—	$	6,777	—
Available for sale securities
U.S. Treasury securities		5,200	—		5,200	—
Obligations of U.S. government sponsored entities and agencies		9,574	—		9,574	—
Mortgage backed securities		972,611	—		972,611	—
Municipal securities		72,758	—		72,758	—
Interest rate swap derivatives		42,480	—		42,480	—
Liabilities:
Interest rate swap derivatives		43,259	—		43,259	—

The fair value of impaired loans with specific valuation allowance for loan losses and other real estate owned is based on recent real estate appraisals. For residential real estate impaired loans and other real estate owned, appraised values are based on the comparative sales approach. For commercial and commercial real estate impaired loans, and other real estate owned, appraisers may use either a single valuation approach or a combination of approaches such as comparative sales, cost or the income approach. A significant unobservable input in the income approach is the estimated income capitalization rate for a given piece of collateral. At September 30, 2018, the range of capitalization rates utilized to determine the fair value of the underlying collateral ranged from 7% to 10%. Adjustments to appraisals may be made by the appraiser to reflect local market conditions or other economic factors and may

12

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

result in changes in the fair value of a given asset over time. As such, the fair value of impaired loans, other real estate owned and bank property held for sale are considered a Level 3 in the fair value hierarchy.

Assets and liabilities measured at fair value on a non-recurring basis are summarized below.

			Fair value measurements using
					Significant
			Quoted prices in		other		Significant
			active markets for		observable		unobservable
	Carrying		identical assets		inputs		inputs
	value		(Level 1)		(Level 2)		(Level 3)
at September 30, 2018
Assets:
Impaired loans
Residential real estate	$	2,312	—		—		$	2,312
Commercial real estate		5,350	—		—			5,350
Land, land development and construction		942	—		—			942
Commercial		251	—		—			251
Consumer		52	—		—			52
Other real estate owned
Residential real estate		117						117
Commercial real estate		261	—		—			261
Land, land development and construction		1,312	—		—			1,312
Bank property held for sale		5,805	—		—			5,805
at December 31, 2017
Assets:
Impaired loans
Residential real estate	$	2,423		—		—	$	2,423
Commercial real estate		6,293		—		—		6,293
Land, land development and construction		292		—		—		292
Commercial		2,131		—		—		2,131
Consumer		57		—		—		57
Other real estate owned
Residential real estate		635		—		—		635
Commercial real estate		261		—		—		261
Land, land development and construction		1,481		—		—		1,481
Bank property held for sale		1,516		—		—		1,516

Impaired loans measured at fair value had a recorded investment of $10,102 with a valuation allowance of $1,195, at September 30, 2018, and a recorded investment of $11,673, with a valuation allowance of $477, at December 31, 2017. The Company recorded a provision for loan loss expense of $682 and $1,026 on these loans during the three and nine month periods ending September 30, 2018.  The Company recorded a provision for loan loss expense of $384 and $779 on impaired loans carried at fair value during the three and nine month periods ending September 30, 2017.

Other real estate owned had a decline in fair value of $170, $141, $464 and $612 during the three and nine month periods ending September 30, 2018 and 2017, respectively.  Changes in fair value were recorded directly to current earnings through non interest expense.

Bank property held for sale represents certain branch office buildings which the Company has closed and consolidated with other existing branches. The real estate was transferred out of the Bank Premises and Equipment category into bank property held for sale at the lower of amortized cost or fair value less estimated costs to sell. The fair values were based upon appraisals.  The Company recognized an impairment charge of $247, $0, $2,587 and $507 during the three and nine month periods ending September 30, 2018 and 2017, respectively, related to bank properties held for sale.  

13

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

Fair Value of Financial Instruments

The methods and assumptions, not previously presented, used to estimate fair value are described as follows:

Cash and Cash Equivalents: The carrying amounts of cash and cash equivalents approximate fair values and are classified as Level 1.

FHLB, FRB and Other Stock: It is not practical to determine the fair value of FHLB, FRB and other stock due to restrictions placed on their transferability.

Investment securities held to maturity:  The fair values of securities held to maturity are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs).

Loans, net: ASU 2016-1, "Recognition and Measurement of Financial Assets and Financial Liabilities," requires the Company to use the exit price notion when measuring fair value of financial instruments for disclosure purposes effective January 1, 2018, therefore the fair value presented in the following table may not be comparable to prior period.  For performing loans, the fair value is determined based on a discounted cash flow analysis (income approach).  The discounted cash flow was based on contractual maturity of the loan and market indications of rates, prepayment speeds, defaults and credit risk resulting in Level 3 classification.  For non-performing loans, the fair value is determined based on the estimated values of the underlying collateral or individual analysis of receipts (asset approach) resulting in Level 3 classification.  At December 31, 2017, the fair values of loans, excluding loans held for sale, were estimated as follows: for variable rate loans that reprice frequently and with no significant change in credit risk, fair values were based on carrying values resulting in a Level 3 classification. Fair values for other loans were estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality resulting in a Level 3 classification. Impaired loans were valued as described previously.

Accrued Interest Receivable: The carrying amount of accrued interest receivable approximates fair value and is classified as Level 2 for accrued interest receivable related to investment securities and Level 3 for accrued interest receivable related to loans.

Deposits: The fair values disclosed for demand deposits (e.g., interest and non-interest checking, savings, and money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amount) resulting in Level 1 classification. Fair values for fixed rate certificates of deposit are estimated using a discounted cash flows calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits resulting in a Level 2 classification.

Short-term Borrowings: The carrying amounts of federal funds purchased, borrowings under repurchase agreements, and other short-term borrowings, generally maturing within ninety days, approximate their fair values resulting in a Level 2 classification.

Corporate Debentures: The fair values of the Company’s corporate debentures are estimated using discounted cash flow analyses based on the current borrowing rates for similar types of borrowing arrangements resulting in a Level 3 classification.

Accrued Interest Payable: The carrying amount of accrued interest payable approximates fair value resulting in a Level 2 classification.

Off-balance Sheet Instruments: The fair value of off-balance-sheet items is not considered material.

14

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The following table presents the carry amounts and estimated fair values of the Company’s financial instruments:

			Fair value measurements
at September 30, 2018	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	606,331	$	606,331	$	—	$	—	$	606,331
Investment securities available for sale		1,536,842		—		1,536,842		—		1,536,842
Investment securities held to maturity		219,850		—		211,262		—		211,262
FHLB, FRB and other stock		70,311		—		—		—	n/a
Loans held for sale, at fair value		39,554		—		39,554		—		39,554
Loans, net		8,184,281		—		—		8,125,840		8,125,840
Mortgage banking derivatives		938		—		—		938		938
Interest rate swap derivatives		87,946		—		87,946		—		87,946
Accrued interest receivable		32,972		—		6,798		26,174		32,972
Financial liabilities:
Deposits- without stated maturities	$	7,612,238	$	7,612,238	$	—	$	—	$	7,612,238
Deposits- with stated maturities		1,862,288		—		1,867,827		—		1,867,827
Securities sold under agreement to repurchase		51,311		—		51,311		—		51,311
Federal funds purchased and other borrowings		643,002		—		643,002		—		643,002
Corporate debentures		41,328		—		—		37,928		37,928
Mortgage banking derivatives		27		—		—		27		27
Interest rate swap derivatives		88,065		—		88,065		—		88,065
Accrued interest payable		2,570		—		2,570		—		2,570

			Fair value measurements
at December 31, 2017	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	280,619	$	280,619	$	—	$	—	$	280,619
Trading securities		6,777		—		6,777		—		6,777
Investment securities available for sale		1,060,143		—		1,060,143		—		1,060,143
Investment securities held to maturity		232,399		—		231,615		—		231,615
FHLB and FRB stock		34,876		—		—		—	n/a
Loans held for sale		19,647		—		19,647		—		19,647
Loans, net		4,740,396		—		—		4,731,514		4,731,514
Interest rate swap derivatives		42,480		—		42,480		—		42,480
Accrued interest receivable		18,628		—		5,370		13,258		18,628
Financial liabilities:
Deposits- without stated maturities	$	4,727,840	$	4,727,840	$	—	$	—	$	4,727,840
Deposits- with stated maturities		832,683		—		845,039		—		845,039
Securities sold under agreement to repurchase		52,080		—		52,080		—		52,080
Federal funds purchased and other borrowings		506,490		—		506,490		—		506,490
Corporate debentures		26,192		—		—		22,363		22,363
Interest rate swap derivatives		43,259		—		43,259		—		43,259
Accrued interest payable		1,169		—		1,169		—		1,169

15

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

NOTE 4: Reportable segments

The Company’s reportable segments represent the distinct product lines the Company offers and are viewed separately for strategic planning purposes by management. The table below is a reconciliation of the reportable segment revenues, expenses, and profit to the Company’s consolidated total for the three and nine month periods ending September 30, 2018 and 2017.

	Three month period ending September 30, 2018
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	110,764		$	3,899		$	—		$	—		$	114,663
Interest expense		(9,992	)		(2,005	)		(813	)		—			(12,810	)
Net interest income (expense)		100,772			1,894			(813	)		—			101,853
Provision for loan losses		(1,965	)		15			—			—			(1,950	)
Non interest income		18,808			8,296			—			—			27,104
Non interest expense		(70,652	)		(5,678	)		(1,009	)		—			(77,339	)
Net income (loss) before taxes		46,963			4,527			(1,822	)		—			49,668
Income tax (provision) benefit		(11,086	)		(1,147	)		550			—			(11,683	)
Net income	$	35,877		$	3,380		$	(1,272	)	$	—		$	37,985
Total assets	$	11,604,329		$	661,880		$	1,969,635		$	(1,961,479	)	$	12,274,365

	Nine month period ending September 30, 2018
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	317,851		$	10,600		$	—		$	—		$	328,451
Interest expense		(23,689	)		(4,734	)		(2,628	)		—			(31,051	)
Net interest income (expense)		294,162			5,866			(2,628	)		—			297,400
Provision for loan losses		(6,039	)		(144	)		—			—			(6,183	)
Non interest income		49,228			23,495			8			—			72,731
Non interest expense		(213,934	)		(16,172	)		(2,841	)		—			(232,947	)
Net income (loss) before taxes		123,417			13,045			(5,461	)		—			131,001
Income tax (provision) benefit		(28,585	)		(3,305	)		6,673			—			(25,217	)
Net income (loss)	$	94,832		$	9,740		$	1,212		$	—		$	105,784
Total assets	$	11,604,329		$	661,880		$	1,969,635		$	(1,961,479	)	$	12,274,365

	Three month period ending September 30, 2017
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	64,410		$	2,647		$	—		$	—		$	67,057
Interest expense		(3,305	)		(819	)		(347	)		—			(4,471	)
Net interest income (expense)		61,105			1,828			(347	)		—			62,586
Provision for loan losses		(1,113	)		17			—			—			(1,096	)
Non interest income		9,528			7,213			—			—			16,741
Non interest expense		(38,432	)		(5,304	)		(886	)		—			(44,622	)
Net income (loss) before taxes		31,088			3,754			(1,233	)		—			33,609
Income tax (provision) benefit		(10,579	)		(1,448	)		468			—			(11,559	)
Net income	$	20,509		$	2,306		$	(765	)	$	—		$	22,050
Total assets	$	6,319,532		$	498,669		$	940,571		$	(935,911	)	$	6,822,861

16

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

	Nine month period ending September 30, 2017
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	175,015		$	7,889		$	—		$	—		$	182,904
Interest expense		(7,934	)		(2,048	)		(998	)		—			(10,980	)
Net interest income (expense)		167,081			5,841			(998	)		—			171,924
Provision for loan losses		(4,073	)		83			—			—			(3,990	)
Non interest income		26,493			21,724			—			—			48,217
Non interest expense		(119,304	)		(15,594	)		(2,576	)		—			(137,474	)
Net income (loss) before taxes		70,197			12,054			(3,574	)		—			78,677
Income tax (provision) benefit		(22,900	)		(4,649	)		2,755			—			(24,794	)
Net income (loss)	$	47,297		$	7,405		$	(819	)	$	—		$	53,883
Total assets	$	6,319,532		$	498,669		$	940,571		$	(935,911	)	$	6,822,861

Commercial and retail banking: The Company’s primary business is commercial and retail banking. Currently, the Company operates primarily through the Bank providing traditional retail, commercial, mortgage, wealth management and SBA services throughout its Florida, Georgia and Alabama branch network and customer relationships in neighboring states.

Correspondent banking and capital markets division: Operating as a division of our Bank, the correspondent area’s primary revenue generating activities are related to the capital markets division which includes commissions earned on fixed income security sales, fees from hedging services, loan brokerage fees and consulting fees for services related to these activities. Income generated related to the correspondent banking services includes spread income earned on correspondent bank deposits (i.e. federal funds purchased) and fees generated from safe-keeping activities, bond accounting services, asset/liability consulting services, international wires, clearing and corporate checking account services and other correspondent banking related services. The fees derived from the correspondent banking services are less volatile than those generated through the capital markets group. The customer base includes small to medium size financial institutions primarily located in Southeastern United States.

Corporate overhead and administration: Corporate overhead and administration is comprised primarily of compensation and benefits for certain members of management, interest on parent company debt, office occupancy and depreciation of parent company facilities, certain merger related costs and other expenses.

17

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

NOTE 5: Investment securities

Available-for-Sale

All of the mortgage backed securities listed below were issued by U.S. government sponsored entities and agencies, primarily Fannie Mae, Freddie Mac and Ginnie Mae, institutions which the government has affirmed its commitment to support. The fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:

	September 30, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Corporate debt securities	$	6,265	$	96	$	—	$	6,361
Obligations of U.S. government sponsored entities and agencies		40,882		6		1,244		39,644
Mortgage backed securities		1,460,552		54		48,147		1,412,459
Municipal securities		79,375		151		1,148		78,378
Total available-for-sale	$	1,587,074	$	307	$	50,539	$	1,536,842
	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. Treasury securities	$	5,000	$	200	$	—	$	5,200
Obligations of U.S. government sponsored entities and agencies		10,000		—		426		9,574
Mortgage backed securities		982,565		752		10,706		972,611
Municipal securities		71,961		863		66		72,758
Total available-for-sale	$	1,069,526	$	1,815	$	11,198	$	1,060,143

The cost of securities sold is determined using the specific identification method. The securities sold during the first quarter of 2018 include some securities acquired through the acquisitions of Sunshine Bancorp, Inc. (“Sunshine”) and HCBF Holding Company, Inc. (“Harbor”) on January 1, 2018. These acquired securities were marked to fair value and subsequently sold after the acquisition date, and no gain or loss was recognized from the sale of these securities.  Sales of available for sale securities for the nine months ended September 30, 2018 and 2017 were as follows:

For the nine months ended:	September 30, 2018		September 30, 2017
Proceeds	$	364,152	$	260,824
Gross gains		68		—
Gross losses		90		—

The tax provision related to these net realized gains was ($6) and $0, respectively.

The fair value of available for sale securities at September 30, 2018 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately.

	Fair		Amortized
Investment securities available for sale:	Value		Cost
Due one year or less	$	782	$	781
Due after one year through five years		5,537		5,502
Due after five years through ten years		29,657		30,535
Due after ten years through thirty years		88,407		89,704
Mortgage backed securities		1,412,459		1,460,552
Total available-for-sale	$	1,536,842	$	1,587,074

Available for sale securities pledged at September 30, 2018 and December 31, 2017 had a carrying amount (estimated fair value) of $884,542 and $255,788 respectively. These securities were pledged primarily to increase borrowing capacity at the FHLB, secure public deposits and repurchase agreements.

18

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

At September 30, 2018 and December 31, 2017, there were no holdings of securities of any one issuer, other than mortgage backed securities issued by U.S. Government sponsored entities, in an amount greater than 10% of stockholders’ equity.

The following tables show the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2018 and December 31, 2017.

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Obligations of U.S. government sponsored entities and agencies	$	27,193	$	352	$	9,108	$	892	$	36,301	$	1,244
Mortgage backed securities		1,047,726		29,046		360,105		19,101		1,407,831		48,147
Municipal securities		70,028		1,148		—		—		70,028		1,148
Total temporarily impaired available-for-sale securities	$	1,144,947	$	30,546	$	369,213	$	19,993	$	1,514,160	$	50,539
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Obligations of U.S. government sponsored entities and agencies	$	—	$	—	$	9,574	$	426	$	9,574	$	426
Mortgage backed securities		477,925		3,298		316,066		7,408		793,991		10,706
Municipal securities		11,698		66		—		—		11,698		66
Total temporarily impaired available-for-sale securities	$	489,623	$	3,364	$	325,640	$	7,834	$	815,263	$	11,198

At  September 30, 2018, 100% of the mortgage-backed securities held by the Company were issued by U.S. government-sponsored entities and agencies, primarily Fannie Mae, Freddie Mac, and Ginnie Mae, institutions which the government has affirmed its commitment to support. Because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and because the Company does not intend to sell these mortgage-backed securities or more likely than not will not be required to sell these securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at September 30, 2018.

Unrealized losses on municipal securities have not been recognized into income because the issuers bonds are of high quality, and because management does not intend to sell these investments or more likely than not will not be required to sell these investments before their anticipated recovery. The fair value is expected to recover as the securities approach maturity.

Held-to-Maturity

The following reflects the fair value of held-to-maturity securities and the related gross unrecognized gains and losses as of September 30, 2018 and December 31, 2017.

	September 30, 2018
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities	$	87,872	$	—	$	3,627	$	84,245
Municipal securities		131,978		410		5,371		127,017
Total held-to-maturity	$	219,850	$	410	$	8,998	$	211,262
	December 31, 2017
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities	$	100,039	$	—	$	1,068	$	98,971
Municipal securities		132,360		1,781		1,497		132,644
Total held to maturity	$	232,399	$	1,781	$	2,565	$	231,615

19

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

Held-to-maturity securities pledged at September 30, 2018 and December 31, 2017 had a carrying amount of $104,650 and $97,389 respectively. These securities were pledged primarily to secure public deposits and repurchase agreements.

At September 30, 2018, there were no holdings of held-to-maturity securities of any one issuer in an amount greater than 10% of stockholders’ equity.

  The fair value and amortized cost of held-to-maturity securities at September 30, 2018 by contractual maturity were as follows. Mortgage-backed securities are not due at a single maturity date and are shown separately.

	Fair		Amortized
Investment securities held-to-maturity	Value		Cost
Due after five years through ten years	$	2,039	$	2,048
Due after ten years through thirty years		124,978		129,930
Mortgage backed securities		84,245		87,872
Total held-to-maturity	$	211,262	$	219,850

The following table shows the Company’s held-to-maturity investments’ gross unrecognized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrecognized loss position, at September 30, 2018 and December 31, 2017.

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrecognized		Fair		Unrecognized		Fair		Unrecognized
	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities	$	22,791	$	924	$	61,454	$	2,703	$	84,245	$	3,627
Municipal securities		57,662		1,558		37,428		3,813		95,090		5,371
Total temporarily impaired held-to-maturity securities	$	80,453	$	2,482	$	98,882	$	6,516	$	179,335	$	8,998
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrecognized		Fair		Unrecognized		Fair		Unrecognized
	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities	$	57,266	$	451	$	41,705	$	617	$	98,971	$	1,068
Municipal securities		13,350		186		37,963		1,311		51,313		1,497
Total temporarily impaired held-to-maturity securities	$	70,616	$	637	$	79,668	$	1,928	$	150,284	$	2,565

At September 30, 2018, 100% of the mortgage-backed securities held by the Company were issued by U.S. government-sponsored entities and agencies, primarily Fannie Mae, Freddie Mac, and Ginnie Mae, institutions which the government has affirmed its commitment to support. Because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and because the Company does not intend to sell these mortgage-backed securities or more likely than not will not be required to sell the securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at September 30, 2018.

Unrealized losses on municipal securities have not been recognized into income because the issuers bonds are of high quality, and because management does not intend to sell these investments or more likely than not will not be required to sell these investments before their anticipated recovery. The fair value is expected to recover as the securities approach maturity.

20

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

NOTE 6: Loans

The following table sets forth information concerning the loan portfolio by collateral types as of the dates indicated.

	September 30, 2018			December 31, 2017
Loans excluding PCI loans
Real estate loans
Residential	$	1,713,093		$	1,025,303
Commercial		4,395,351			2,546,143
Land, development and construction		645,885			235,816
Total real estate		6,754,329			3,807,262
Commercial		1,104,392			693,501
Consumer and other loans		194,603			107,480
Loans before unearned fees and deferred cost		8,053,324			4,608,243
Net unearned fees and costs		2,097			820
Total loans excluding PCI loans		8,055,421			4,609,063
PCI loans (note 1)
Real estate loans
Residential		62,507			59,975
Commercial		92,444			92,791
Land, development and construction		6,955			6,656
Total real estate		161,906			159,422
Commercial		5,479			4,444
Consumer and other loans		286			292
Total PCI loans		167,671			164,158
Total loans		8,223,092			4,773,221
Allowance for loan losses for loans that are not PCI loans		(38,595	)		(32,530	)
Allowance for loan losses for PCI loans		(216	)		(295	)
Total loans, net of allowance for loan losses	$	8,184,281		$	4,740,396

Note 1: Purchased credit impaired (“PCI”) loans are being accounted for pursuant to ASC Topic 310-30.

21

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The table below set forth the activity in the allowance for loan losses for the periods presented.

	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Three months ended September 30, 2018
Balance at beginning of period	$	37,209		$	275		$	37,484
Loans charged-off		(1,178	)		—			(1,178	)
Recoveries of loans previously charged-off		555			—			555
Net charge-offs		(623	)		—			(623	)
Provision for loan losses		2,009			(59	)		1,950
Balance at end of period	$	38,595		$	216		$	38,811
Three months ended September 30, 2017
Balance at beginning of period	$	29,769		$	363		$	30,132
Loans charged-off		(472	)		—			(472	)
Recoveries of loans previously charged-off		1,072			—			1,072
Net recoveries		600			—			600
Provision for loan losses		1,174			(78	)		1,096
Balance at end of period	$	31,543		$	285		$	31,828
	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Nine months ended September 30, 2018
Balance at beginning of period	$	32,530		$	295		$	32,825
Loans charged-off		(2,170	)		—			(2,170	)
Recoveries of loans previously charged-off		1,898			75			1,973
Net (charge-offs) recoveries		(272	)		75			(197	)
Provision for loan losses		6,337			(154	)		6,183
Balance at end of period	$	38,595			216		$	38,811
Nine months ended September 30, 2017
Balance at beginning of period	$	26,569		$	472		$	27,041
Loans charged-off		(1,722	)		—			(1,722	)
Recoveries of loans previously charged-off		2,454			65			2,519
Net recoveries		732			65			797
Provision for loan losses		4,242			(252	)		3,990
Balance at end of period	$	31,543		$	285		$	31,828

22

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The following tables present the activity in the allowance for loan losses by portfolio segment for the periods presented.

	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are not PCI loans:
Three months ended September 30, 2018
Beginning of the period	$	5,847		$	21,921		$	1,629		$	5,412		$	2,400		$	37,209
Charge-offs		(283	)		—			(62	)		(327	)		(506	)		(1,178	)
Recoveries		217			113			2			152			71			555
Provision for loan losses		71			916			21			404			597			2,009
Balance at end of period	$	5,852		$	22,950		$	1,590		$	5,641		$	2,562		$	38,595
Three months ended September 30, 2017
Beginning of the period	$	6,134		$	17,238		$	1,175		$	3,590		$	1,632		$	29,769
Charge-offs		(108	)		(8	)		—			(140	)		(216	)	$	(472	)
Recoveries		290			320			353			82			27		$	1,072
Provision for loan losses		(292	)		1,074			(393	)		458			327		$	1,174
Balance at end of period	$	6,024		$	18,624		$	1,135		$	3,990		$	1,770		$	31,543
	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are PCI loans:
Three months ended September 30, 2018
Beginning of the period	$	—		$	59		$	202		$	—		$	14		$	275
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			—			—			—
Provision for loan losses		—			(59	)		—			—			—			(59	)
Balance at end of period	$	—		$	—		$	202		$	—		$	14		$	216
Three months ended September 30, 2017
Beginning of the period	$	50		$	123		$	176		$	—		$	14		$	363
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			—			—			—
Provision for loan losses		(50	)		(65	)		37			—			—			(78	)
Balance at end of period	$	—		$	58		$	213		$	—		$	14		$	285

23

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are not PCI loans:
Nine months ended September 30, 2018
Beginning of the period	$	6,003		$	19,304		$	1,179		$	4,130		$	1,914		$	32,530
Charge-offs		(419	)		—			(62	)		(555	)		(1,134	)		(2,170	)
Recoveries		855			569			3			214			257			1,898
Provision for loan losses		(587	)		3,077			470			1,852			1,525			6,337
Balance at end of period	$	5,852		$	22,950		$	1,590		$	5,641		$	2,562		$	38,595
Nine months ended September 30, 2017
Beginning of the period	$	5,640		$	14,713		$	883		$	3,785		$	1,548		$	26,569
Charge-offs		(250	)		(72	)		—			(677	)		(723	)		(1,722	)
Recoveries		816			626			596			254			162			2,454
Provision for loan losses		(182	)		3,357			(344	)		628			783			4,242
Balance at end of period	$	6,024		$	18,624		$	1,135		$	3,990		$	1,770		$	31,543
	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are PCI loans:
Nine months ended September 30, 2018
Beginning of the period	$	—		$	59		$	222		$	—		$	14		$	295
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			75			—			75
Provision for loan losses		—			(59	)		(20	)		(75	)		—			(154	)
Balance at end of period	$	—		$	—		$	202		$	—		$	14		$	216
Nine months ended September 30, 2017
Beginning of the period	$	54		$	92		$	312		$	—		$	14		$	472
Charge-offs		—			—			—			—			—			—
Recoveries		—			65			—			—			—			65
Provision for loan losses		(54	)		(99	)		(99	)		—			—			(252	)
Balance at end of period	$	—		$	58		$	213		$	—		$	14		$	285

24

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 and December 31, 2017. Accrued interest receivable and unearned loan fees and costs are not included in the recorded investment because they are not material.

	Real Estate Loans
As of September 30, 2018	Residential		Commercial		Land, develop., constr.		Comm. & industrial		Consumer & other		Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	417	$	445	$	—	$	546	$	5	$	1,413
Collectively evaluated for impairment		5,435		22,505		1,590		5,095		2,557		37,182
Purchased credit impaired		—		—		202		—		14		216
Total ending allowance balance	$	5,852	$	22,950	$	1,792	$	5,641	$	2,576	$	38,811
Loans:
Individually evaluated for impairment	$	7,055	$	7,686	$	971	$	1,292	$	164	$	17,168
Collectively evaluated for impairment		1,706,038		4,387,665		644,914		1,103,100		194,439		8,036,156
Purchased credit impaired		62,507		92,444		6,955		5,479		286		167,671
Total ending loan balances	$	1,775,600	$	4,487,795	$	652,840	$	1,109,871	$	194,889	$	8,220,995

	Real Estate Loans
As of December 31, 2017		Residential		Commercial		Land, develop., constr.		Comm. & industrial		Consumer & other		Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment		$	586	$	—	$	4	$	206	$	8	$	804
Collectively evaluated for impairment			5,417		19,304		1,175		3,924		1,906		31,726
Purchased credit impaired			—		59		222		—		14		295
Total ending allowance balance		$	6,003	$	19,363	$	1,401	$	4,130	$	1,928	$	32,825
Loans:
Individually evaluated for impairment		$	8,101	$	8,218	$	331	$	3,497	$	198	$	20,345
Collectively evaluated for impairment			1,017,202		2,537,925		235,485		690,004		107,282		4,587,898
Purchased credit impaired			59,975		92,791		6,656		4,444		292		164,158
Total ending loan balance		$	1,085,278	$	2,638,934	$	242,472	$	697,945	$	107,772	$	4,772,401

The table below summarizes impaired loan data for the periods presented.

	Sep. 30, 2018		Dec. 31, 2017
Performing TDRs (these are not included in nonperforming loans ("NPLs"))	$	9,204	$	12,081
Nonperforming TDRs (these are included in NPLs)		1,284		698
Total TDRs (these are included in impaired loans)		10,488		12,779
Impaired loans that are not TDRs		6,680		7,566
Total impaired loans	$	17,168	$	20,345

In certain situations it is common to restructure or modify the terms of troubled loans (i.e. troubled debt restructure or “TDRs”). In those circumstances it may be beneficial to restructure the terms of a loan and work with the borrower for the benefit of both parties, versus forcing the property into foreclosure and having to dispose of it in a distressed sale. When the terms of a loan have been modified, usually the monthly payment and/or interest rate is reduced for generally twelve to twenty-four months. Material principal amounts on any loan modifications have not been forgiven to date.

25

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

TDRs as of September 30, 2018 and December 31, 2017 quantified by loan type classified separately as accrual (performing loans) and non-accrual (non performing loans) are presented in the tables below.

As of September 30, 2018	Accruing		Non-Accrual		Total
Real estate loans:
Residential	$	6,525	$	530	$	7,055
Commercial		1,855		687		2,542
Land, development, construction		81		41		122
Total real estate loans		8,461		1,258		9,719
Commercial		605		—		605
Consumer and other		138		26		164
Total TDRs	$	9,204	$	1,284	$	10,488
As of December 31, 2017	Accruing		Non-Accrual		Total
Real estate loans:
Residential	$	7,737	$	364	$	8,101
Commercial		3,286		306		3,592
Land, development, construction		332		—		332
Total real estate loans		11,355		670		12,025
Commercial		556		—		556
Consumer and other		170		28		198
Total TDRs	$	12,081	$	698	$	12,779

Our policy is to return non-accrual TDR loans to accrual status when all the principal and interest amounts contractually due, pursuant to its modified terms, are brought current and future payments are reasonably assured. Our policy also considers the payment history of the borrower, but is not dependent upon a specific number of payments. The Company recorded a provision for loan loss expense of $54 and $82 and partial charge offs of $11 and $32 on the TDR loans described above during the three and nine month periods ending September 30, 2018.  The Company recorded a provision for loan loss expense of $20 and $264 and partial charge-offs of $13 and $55 on TDR loans during the three and nine month periods ending September 30, 2017.

Loans are modified to minimize loan losses when we believe the modification will improve the borrower’s financial condition and ability to repay the loan. We typically do not forgive principal. We generally either reduce interest rates or decrease monthly payments for a temporary period of time and those reductions of cash flows are capitalized into the loan balance. We may also extend maturities, convert balloon loans to longer term amortizing loans, or vice versa, or change interest rates between variable and fixed rate. Each borrower and situation is unique and we try to accommodate the borrower and minimize the Company’s potential losses. Approximately 88% of our TDRs are current pursuant to their modified terms, and $1,284, or approximately 12% of our total TDRs are not performing pursuant to their modified terms. There does not appear to be any significant difference in success rates with one type of concession versus another.

Loans modified as TDRs during the three and nine month periods ending September 30, 2018 were $616 and $1,838.  The Company recorded loan loss provision of $16 and $33 for loans modified during the three and nine month periods ending September 30, 2018.   Loans modified as TDRs during the three and nine month periods ending September 30, 2017 were $85 and $784.  The Company recorded a loan loss provision of $0 and $8 for loans modified during the three and nine month periods ending September 30, 2017.

The following table presents loans by class modified and for which there was a payment default within twelve months following the modification during the periods ending September 30, 2018 and 2017.

	Period ending				Period ending
	September 30, 2018				September 30, 2017
	Number		Recorded		Number		Recorded
	of loans		investment		of loans		investment
Residential		1	$	191		1	$	72
Commercial real estate		1		116		2		616
Land, development, construction		—		—		—		—
Commercial and Industrial		—		—		—		—
Consumer and other		—		—		—		—
Total		2	$	307		3	$	688

26

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The Company recorded a provision for loan loss expense of $18 and $24 and partial charge offs of $5 and $10 on TDR loans that subsequently defaulted as described above during the three and nine month periods ending September 30, 2018.  The Company recorded a provision for loan loss expense of $8 and $24 and partial charge offs of $8 and $24 on TDR loans that subsequently defaulted as described above during the three and nine month period ending September 30, 2017, respectively.

The following tables present loans individually evaluated for impairment by class of loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30. The recorded investment is less than the unpaid principal balance due to partial charge-offs.

As of September 30, 2018	Unpaid principal balance		Recorded investment		Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate	$	4,105	$	3,977	$	—
Commercial real estate		6,634		6,090		—
Land, development, construction		1,009		971		—
Commercial and industrial		427		416		—
Consumer, other		111		111		—
With an allowance recorded:
Residential real estate		3,235		3,078		417
Commercial real estate		1,600		1,596		445
Land, development, construction		—		—		—
Commercial and industrial		880		876		546
Consumer, other		72		53		5
Total	$	18,073	$	17,168	$	1,413

As of December 31, 2017	Unpaid principal balance		Recorded investment		Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate	$	4,945	$	4,818	$	—
Commercial real estate		8,973		8,218		—
Land, development, construction		260		210		—
Commercial and industrial		3,374		2,968		—
Consumer, other		142		127		—
With an allowance recorded:
Residential real estate		3,426		3,283		586
Commercial real estate		—		—		—
Land, development, construction		140		121		4
Commercial and industrial		531		529		206
Consumer, other		78		71		8
Total	$	21,869	$	20,345	$	804

27

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

Three months ended September 30, 2018	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,328	$	79	$	—
Commercial		7,674		25		—
Land, development, construction		961		2		—
Total real estate loans		15,963		106		—
Commercial and industrial		1,596		9		—
Consumer and other loans		165		2		—
Total	$	17,724	$	117	$	—
Nine months ended September 30, 2018	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	15,306	$	308	$	—
Commercial		2,586		25		—
Land, development, construction		324		2		—
Total real estate loans		18,216		335		—
Commercial and industrial		538		9		—
Consumer and other loans		56		2		—
Total	$	18,810	$	346	$	—

28

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

Three months ended September 30, 2017	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,536	$	70	$	—
Commercial		9,200		35		—
Land, development, construction		343		5		—
Total real estate loans		17,079		110		—
Commercial and industrial		1,859		7		—
Consumer and other loans		262		3		—
Total	$	19,200	$	120	$	—
Nine months ended September 30, 2017	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,767	$	207	$	—
Commercial		8,979		104		—
Land, development, construction		465		13		—
Total real estate loans		17,211		324		—
Commercial and industrial		1,702		22		—
Consumer and other loans		245		8		—
Total	$	19,158	$	354	$	—

Nonperforming loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30.

Nonperforming loans were as follows:	Sep. 30, 2018		Dec. 31, 2017
Non accrual loans	$	23,450	$	17,288
Loans past due over 90 days and still accruing interest		—		—
Total non performing loans	$	23,450	$	17,288

29

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The following table presents the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans:  

As of September 30, 2018	Nonaccrual		Loans past due over 90 days still accruing
Residential real estate	$	9,234	$	—
Commercial real estate		9,108		—
Land, development, construction		2,441		—
Commercial		2,237		—
Consumer, other		430		—
Total	$	23,450	$	—
As of December 31, 2017	Nonaccrual		Loans past due over 90 days still accruing
Residential real estate	$	7,107	$	—
Commercial real estate		6,549		—
Land, development, construction		138		—
Commercial		3,121		—
Consumer, other		373		—
Total	$	17,288	$	—

The following table presents the aging of the recorded investment in past due loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans:  

					Accruing Loans
	Total		30 - 59 days past due		60 - 89 days past due		Greater than 90 days past due		Total Past Due		Loans Not Past Due		Nonaccrual Loans
As of September 30, 2018
Residential real estate	$	1,713,093	$	4,011	$	4,177	$	—	$	8,188	$	1,695,671	$	9,234
Commercial real estate		4,395,351		8,556		5,907		—		14,463		4,371,780		9,108
Land/dev/construction		645,885		796		526		—		1,322		642,122		2,441
Commercial		1,104,392		2,327		970		—		3,297		1,098,858		2,237
Consumer		194,603		929		191		—		1,120		193,053		430
	$	8,053,324	$	16,619	$	11,771	$	—	$	28,390	$	8,001,484	$	23,450
					Accruing Loans
	Total		30 - 59 days past due		60 - 89 days past due		Greater than 90 days past due		Total Past Due		Loans Not Past Due		Nonaccrual Loans
As of December 31, 2017
Residential real estate	$	1,025,303	$	3,568	$	1,821	$	—	$	5,389	$	1,012,807	$	7,107
Commercial real estate		2,546,143		1,158		2,272		—		3,430		2,536,164		6,549
Land/dev/construction		235,816		2,807		189		—		2,996		232,682		138
Commercial		693,501		568		763		—		1,331		689,049		3,121
Consumer		107,480		471		48		—		519		106,588		373
	$	4,608,243	$	8,572	$	5,093	$	—	$	13,665	$	4,577,290	$	17,288

30

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

Credit Quality Indicators:

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis is performed on at least an annual basis. The Company uses the following definitions for risk ratings:

Special Mention: Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date.

Substandard: Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.

Doubtful: Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.

Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans.  The following table presents the risk category of loans by class of loans based on the most recent analysis performed, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30, as of September 30, 2018 and December 31, 2017.   The increase in loans categorized as special mention and substandard between the periods presented is due to the acquisitions of Sunshine and Harbor on January 1, 2018 and Charter on September 1, 2018.  

			As of September 30, 2018
Loan Category	Pass		Special Mention		Substandard		Doubtful
Residential real estate	$	1,639,770	$	46,373	$	26,950	$	—
Commercial real estate		4,181,026		167,606		46,719		—
Land/dev/construction		604,023		36,933		4,929		—
Commercial		1,076,627		23,896		3,869		—
Consumer		193,671		263		669		—
Total	$	7,695,117	$	275,071	$	83,136	$	—
			As of December 31, 2017
Loan Category	Pass		Special Mention		Substandard		Doubtful
Residential real estate	$	987,472	$	20,435	$	17,396	$	—
Commercial real estate		2,411,085		115,942		19,116		—
Land/dev/construction		217,555		17,699		562		—
Commercial		674,764		14,186		4,551		—
Consumer		106,735		139		606		—
Total	$	4,397,611	$	168,401	$	42,231	$	—

The Company considers the performance of the loan portfolio and its impact on the allowance for loan losses. For residential and consumer loan classes, the Company also evaluates credit quality based on the aging status of the loan, which was previously presented, and by payment activity. The following table presents the recorded investment in residential and consumer loans, excluding purchased credit impaired loans, based on payment activity as of September 30, 2018 and December 31, 2017:

As of September 30, 2018	Residential		Consumer
Performing	$	1,703,859	$	194,173
Nonperforming		9,234		430
Total	$	1,713,093	$	194,603
As of December 31, 2017	Residential		Consumer
Performing	$	1,018,196	$	107,107
Nonperforming		7,107		373
Total	$	1,025,303	$	107,480

31

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

Purchased Credit Impaired (“PCI”) loans:

Income is recognized on PCI loans pursuant to ASC Topic 310-30. A portion of the fair value discount has been ascribed as an accretable yield that is accreted into interest income over the estimated remaining life of the loans. The remaining non-accretable difference represents cash flows not expected to be collected.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans as of September 30, 2018 and December 31, 2017. Contractually required principal and interest payments have been adjusted for estimated prepayments.

	Sep. 30, 2018			Dec. 31, 2017
Contractually required principal and interest	$	294,278		$	248,283
Non-accretable difference		(59,433	)		(13,183	)
Cash flows expected to be collected		234,845			235,100
Accretable yield		(67,174	)		(70,942	)
Carrying value of acquired loans		167,671			164,158
Allowance for loan losses		(216	)		(295	)
Carrying value less allowance for loan losses	$	167,455		$	163,863

The Company adjusted its estimates of future expected losses, cash flows and renewal assumptions during the current quarter. These adjustments resulted in an increase in expected cash flows and accretable yield, and a decrease in the non-accretable difference. The Company reclassified $4,529, $2,286, $8,443 and $8,364 from non-accretable difference to accretable yield during the three and nine month periods ending September 30, 2018 and 2017 to reflect its adjusted estimates of future expected cash flows.   The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three and nine month periods ending September 30, 2018 and 2017.   

Activity during the				Effect of			income		all other
three month period ending September 30, 2018	Jun. 30, 2018			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	285,576		$	33,687		$	—	$	(24,985	)	$	294,278
Non-accretable difference		(44,166	)		(20,763	)		—		5,496			(59,433	)
Cash flows expected to be collected		241,410			12,924			—		(19,489	)		234,845
Accretable yield		(67,460	)		(1,492	)		7,682		(5,904	)		(67,174	)
Carry value of acquired loans	$	173,950		$	11,432		$	7,682	$	(25,393	)	$	167,671
Activity during the				Effect of			income		all other
nine month period ending September 30, 2018	Dec. 31, 2017			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	248,283		$	122,392		$	—	$	(76,397	)	$	294,278
Non-accretable difference		(13,183	)		(58,927	)		—		12,677			(59,433	)
Cash flows expected to be collected		235,100			63,465			—		(63,720	)		234,845
Accretable yield		(70,942	)		(7,770	)		26,496		(14,958	)		(67,174	)
Carry value of acquired loans	$	164,158		$	55,695		$	26,496	$	(78,678	)	$	167,671
Activity during the				Effect of			income		all other
three month period ending September 30, 2017	Jun. 30, 2017			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	280,114		$	—		$	—	$	(21,776	)	$	258,338
Non-accretable difference		(14,047	)		—			—		1,148			(12,899	)
Cash flows expected to be collected		266,067			—			—		(20,628	)		245,439
Accretable yield		(86,703	)		—			7,696		(2,457	)		(81,464	)
Carry value of acquired loans	$	179,364		$	—		$	7,696	$	(23,085	)	$	163,975
Activity during the				Effect of			income		all other
nine month period ending September 30, 2017	Dec. 31, 2016			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	297,821		$	20,729		$	—	$	(60,212	)	$	258,338
Non-accretable difference		(18,372	)		(6,347	)		—		11,820			(12,899	)
Cash flows expected to be collected		279,449			14,382			—		(48,392	)		245,439
Accretable yield		(93,525	)		(3,266	)		24,780		(9,453	)		(81,464	)
Carry value of acquired loans	$	185,924		$	11,116		$	24,780	$	(57,845	)	$	163,975

32

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

NOTE 7:  Loans Held for Sale

For periods prior to December 31, 2017, mortgage loans held for sale were valued at the lower of cost or fair value.  Effective January 1, 2018, the Company elected to account for these loans under the fair value option with changes in fair value recognized in current period earnings.  At the date of funding of the loan, the funded amount of the loan, the relative derivative asset or liability of the associated interest rate lock commitment, less direct costs, becomes the initial recorded investment in the loan held for sale.  Such amount approximates the fair value of the loan.  This change was accounted for on a prospective basis.  Net gains from changes in estimated fair value of mortgage loans held for sale were $723 at September 30, 2018. No loans held for sale at September 30, 2018 were past due or on nonaccrual.   

The table below summarizes the activity in mortgage loans held for sale during the three month periods ending September 30, 2018 and 2017.

	Three month periods ended						Nine month periods ended
	Sep. 30, 2018			Sep. 30, 2017			Sep. 30, 2018			Sep. 30, 2017
Beginning balance	$	36,366		$	8,959		$	19,647		$	2,285
Effect from acquisitions		2,835			—			8,959			—
Loans originated		91,910			23,444			242,226			53,806
Proceeds from sales		(94,226	)		(20,564	)		(238,613	)		(44,780	)
Change in fair value		1			—			723			—
Net realized gain on sales		2,668		404				6,612			932
Ending balance	$	39,554		$	12,243		$	39,554		$	12,243

As loans are closed, they are typically sold at prices specified in the forward contracts.  Gains or losses may arise if the yields of the loans delivered vary from those specified in the forward contracts.  Derivative mortgage loan commitments, or interest rate locks, are also utilized and relate to the origination of a mortgage that will be held for sale upon funding.   The Company uses these derivative financial instruments on its loans held for sale to manage interest rate risk and not for speculative purposes.   The table below summarizes the notional amounts for interest rate lock commitments, best efforts forward trades and MBS forward trades pertaining to loans held for sale at September 30, 2018.

	Notional
Interest rate lock commitments	$	75,811
Best efforts forward trades		66,425
MBS forward trades		27,000
Total derivative instruments	$	169,236

Mortgage banking derivatives used in the ordinary course of business consist of forward sales contracts and interest rate lock commitments on residential mortgage loans.  Forward sales contracts represent future commitments to deliver loans at a specified price and by a specified date and are used to manage interest rate risk on loan commitments and mortgage loans held for sale.  Rate lock commitments represent commitments to fund loans at a specific rate and by a specified expiration date.  These derivatives involve underlying items, such as interest rates, and are designed to mitigate risk. Notional amounts are amounts on which calculations and payments are based, but which do not represent credit exposure, as credit exposure is limited to the amounts required to be received or paid.

33

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

NOTE 8: Securities sold under agreement to repurchase

Our Bank enters into borrowing arrangements with our retail business customers by agreements to repurchase (“securities sold under agreements to repurchase”) under which the bank pledges investment securities owned and under its control as collateral against these one-day borrowing arrangement. These short-term borrowings totaled $51,311 at September 30, 2018 compared to $52,080 at December 31, 2017.  The following table provides additional details for the periods presented.

	MBS			Municipal
As of September 30, 2018	Securities			Securities			Total
Market value of securities pledged	$	66,849		$	434		$	67,283
Borrowings related to pledged amounts		51,195		116				51,311
Market value pledged as a % of borrowings		131	%		374	%		131	%
As of December 31, 2017
Market value of securities pledged	$	59,239		$	443		$	59,682
Borrowings related to pledged amounts		52,030		50				52,080
Market value pledged as a % of borrowings		114	%		886	%		115	%

Any risk related to these arrangements, primarily market value changes, are minimized due to the overnight (one day) maturity and the additional collateral pledged over the borrowed amounts.

NOTE 9: Business Combinations  

 Acquisition of Platinum Bank Holding Company

On April 1, 2017, the Company completed its acquisition of Platinum whereby Platinum merged with and into the Company. Pursuant to and simultaneously with the merger of Platinum with and into the Company, Platinum’s wholly owned subsidiary bank, Platinum Bank, merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to further solidify its market share in the Central Florida markets and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale. The acquisition increased the Company’s total assets and total deposits by approximately 14% and 13%, respectively, as compared with the balances at December 31, 2016, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018 and 2017, respectively, the Company incurred approximately $0, $0, $0 and $3,927 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Condensed Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $73,829 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date.

The Company acquired 100% of the outstanding common stock of Platinum. The purchase price consisted of both cash and stock. Each share of Platinum common stock was exchanged for $7.60 cash and 3.7832 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on March 31, 2017, the resulting purchase price was $119,431.

34

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The table below summarizes the purchase price calculation.

Number of shares of Platinum common stock outstanding at March 31, 2017		1,131,134
Per share exchange ratio	3.7832
Number of shares of CenterState common stock less 51 of fractional shares		4,279,255
Multiplied by CenterState common stock price per share on March 31, 2017	$	25.90
Fair value of CenterState common stock issued	$	110,833
Total Platinum common shares		1,131,134
Multiplied by the cash consideration each Platinum share is entitled to receive	$	7.60
Total cash consideration, not including cash for fractional shares	$	8,597
Total stock consideration	$	110,833
Total cash consideration plus $1 for 51 of fractional shares	$	8,598
Total purchase price	$	119,431

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the April 1, 2017 purchase date.

	April 1, 2017
Assets:
Cash and cash equivalents	$	106,537
Loans, held for investment		442,366
Purchased credit impaired loans		12,218
Investments		28,873
Accrued interest receivable		1,216
Branch real estate		9,600
Furniture and fixtures		402
Bank property held for sale		4,382
FHLB stock		2,220
Other repossessed real estate owned		272
Core deposit intangible		3,992
Goodwill		73,829
Deferred tax asset		227
Other assets		29
Total assets acquired	$	686,163
Liabilities:
Deposits	$	520,423
Federal Home Loan Bank advances		40,546
Securities sold under agreement to repurchase		5,569
Accrued interest payable		94
Other liabilities		100
Total liabilities assumed	$	566,732

In the acquisition, the Company acquired $454,584 of loans at fair value, net of $8,980, or 1.9%, estimated discount to the outstanding principal balance, representing 13.3% of the Company’s total loans at December 31, 2016. Of the total loans acquired, management identified $12,218 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of April 1, 2017 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	18,811
Non-accretable difference		(4,639	)
Cash flows expected to be collected		14,172
Accretable yield		(1,954	)
Total purchased credit-impaired loans acquired	$	12,218

35

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	37,206	$	37,419
Commercial real estate		262,612		259,727
Construction/development/land		47,675		46,618
Commercial loans		96,587		95,701
Consumer and other loans		2,954		2,901
Purchased credit-impaired		16,530		12,218
Total earning assets	$	463,564	$	454,584

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $3,992, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of Gateway Financial Holdings of Florida, Inc.

On May 1, 2017, the Company completed its acquisition of Gateway whereby Gateway merged with and into the Company.  Pursuant to and simultaneously with the merger of Gateway with and into the Company, Gateway’s three subsidiary banks, Gateway Bank of Florida, Gateway Bank of Central Florida and Gateway Bank of Southwest Florida, merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to expand its market share in the Central Florida market, together with its acquisition of Platinum as described above, and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale. The acquisition increased the Company’s total assets and total deposits by approximately 19% and 17%, respectively, as compared with the balances at December 31, 2016, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018 and 2017, respectively, the Company incurred approximately $0, $0, $149 and $6,401 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Condensed Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $77,826 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date.

The Company acquired 100% of the outstanding common stock of Gateway. The purchase price consisted of both cash and stock. Each share of Gateway common stock was either exchanged for $18.00 cash or 0.95 shares of the Company’s common stock. In addition, the Company assumed Gateway’s stock options, which were converted to the Company’s stock options.  Based on the closing price of the Company’s common stock on April 30, 2017, the resulting purchase price was $157,372.  

36

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The table below summarizes the purchase price calculation.

Number of shares of Gateway common stock outstanding at April 30, 2017		5,463,764
Gateway preferred shares that converted to Gateway common shares upon a change in control		919,236
Total Gateway common shares including conversion of preferred shares		6,383,000
Number of shares of Gateway common shares exchanged for CenterState common stock		4,468,100
Per share exchange ratio	0.95
Number of shares of CenterState common stock less 254 of fractional shares		4,244,441
Multiplied by CenterState common stock price per share on April 30, 2017	$	25.23
Fair value of CenterState common stock issued	$	107,087
Number of shares of Gateway common shares exchanged for cash		1,914,900
Multiplied by the cash consideration each Gateway share is entitled to receive	$	18.00
Total cash consideration, not including cash for fractional shares	$	34,468
Total stock consideration	$	107,087
Total cash consideration plus $6 for 254 of fractional shares	$	34,474
Total consideration paid to Gateway common shareholders	$	141,561
Fair value of Gateway stock options converted to CenterState stock options	$	15,811
Total purchase price	$	157,372

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the May 1, 2017 purchase date.

	May 1, 2017
Assets:
Cash and cash equivalents	$	23,065
Loans, held for investment		560,413
Purchased credit impaired loans		7,827
Investments		231,951
Accrued interest receivable		2,422
Branch real estate		18,160
Furniture and fixtures		702
Bank property held for sale		1,087
Federal Reserve Bank and Federal Home Loan Bank stock		4,640
Other repossessed real estate owned		134
Bank owned life insurance		15,475
Servicing asset		271
Core deposit intangible		8,432
Goodwill		77,826
Deferred tax asset		7,246
Other assets		1,217
Total assets acquired	$	960,868
Liabilities:
Deposits	$	708,209
Federal Home Loan Bank advances		90,598
Federal funds purchased		3,588
Accrued interest payable		304
Other liabilities		797
Total liabilities assumed	$	803,496

37

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

In the acquisition, the Company acquired $568,240 of loans at fair value, net of $9,479, or 1.6%, estimated discount to the outstanding principal balance, representing 16.6% of the Company’s total loans at December 31, 2016. Of the total loans acquired, management identified $7,827 with credit deficiencies.  All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.  

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of May 1, 2017 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	12,523
Non-accretable difference		(2,465	)
Cash flows expected to be collected		10,058
Accretable yield		(2,231	)
Total purchased credit-impaired loans acquired	$	7,827

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	142,881	$	142,468
Commercial real estate		321,262		317,578
Construction/development/land		47,727		46,489
Commercial loans		46,953		46,274
Consumer and other loans		7,803		7,604
Purchased credit-impaired		11,093		7,827
Total earning assets	$	577,719	$	568,240

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $8,432, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of Sunshine Bancorp, Inc.

On January 1, 2018, the Company completed its acquisition of Sunshine Bancorp, Inc. (“Sunshine”) whereby Sunshine merged with and into the Company. Pursuant to and simultaneously with the merger of Sunshine with and into the Company, Sunshine’s wholly owned subsidiary bank, Sunshine Bank merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to further solidify its market share in the Florida market and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale.  The acquisition increased the Company’s total assets and total deposits by approximately 14% and 13%, respectively, as compared with the balances at December 31, 2017, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018, the Company incurred approximately $0 and $10,474 of acquisition costs related to this transaction. A portion of these merger expenses reduced goodwill by $4,114, net of income taxes of $1,397. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Condensed Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $114,228 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date. Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available.  Fair value estimates on loans are deemed preliminary due to appraisals and other borrower financial information.  

The Company acquired 100% of the outstanding common stock of Sunshine. The purchase price consisted of stock plus cash in lieu of fractional shares. Each share of Sunshine common stock was exchanged for 0.89 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on December 29, 2017, the resulting purchase price was $187,852.  

38

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The table below summarizes the purchase price calculation.

Number of shares of Sunshine common stock outstanding at December 31, 2017		7,922,479
Per share exchange ratio	0.89
Number of shares of CenterState common stock less 361 of fractional shares		7,050,645
CenterState common stock price per share on December 29, 2017	$	25.73
Fair value of CenterState common stock issued	$	181,413
Cash consideration paid for 361 of fractional shares		7
Total consideration to be paid to Sunshine common shareholders	$	181,420
Fair value of Sunshine stock options converted to CenterState stock options		6,432
Total Purchase Price for Sunshine	$	187,852

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the January 1, 2018 purchase date.

	January 1, 2018
Assets:
Cash and cash equivalents	$	47,056
Loans, held for investment		676,090
Purchased credit impaired loans		8,232
Loans held for sale		430
Investments		93,006
Accrued interest receivable		2,170
Branch real estate		9,375
Furniture and fixtures		916
Bank property held for sale		9,503
FHLB stock		4,875
Bank owned life insurance		23,101
Core deposit intangible		8,525
Goodwill		114,228
Deferred tax asset		11,670
Other assets		6,135
Total assets acquired	$	1,015,312
Liabilities:
Deposits	$	719,039
Federal Home Loan Bank advances		95,001
Securities sold under agreement to repurchase		353
Subordinated notes		11,000
Accrued interest payable		457
Other liabilities		1,610
Total liabilities assumed	$	827,460

In the acquisition, the Company acquired $684,322 of loans at fair value, net of $22,657, or 3.2%, estimated discount to the outstanding principal balance, representing 14.3% of the Company’s total loans at December 31, 2017. Of the total loans acquired, management identified $8,232 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of January 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	21,598
Non-accretable difference		(12,213	)
Cash flows expected to be collected		9,385
Accretable yield		(1,153	)
Total purchased credit-impaired loans acquired	$	8,232

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

39

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	148,342	$	146,057
Commercial real estate		375,377		371,323
Construction/development/land		58,530		57,331
Commercial loans		104,811		99,650
Consumer and other loans		1,770		1,729
Purchased credit-impaired		18,149		8,232
Total earning assets	$	706,979	$	684,322

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $8,525, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of HCBF Holding Company, Inc.

On January 1, 2018, the Company completed its acquisition of HCBF Holding Company, Inc. (“Harbor”) whereby Harbor merged with and into the Company. Pursuant to and simultaneously with the merger of Harbor with and into the Company, Harbor’s wholly owned subsidiary bank, Harbor Bank merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to further solidify its market share in the Florida market and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale.  The acquisition increased the Company’s total assets and total deposits by approximately 33% and 32%, respectively, as compared with the balances at December 31, 2017, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018 and 2017, the Company incurred approximately $0 and $11,527 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $233,321 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date. Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available.   Fair value estimates on loans are deemed preliminary due to appraisals and other borrower financial information.  

The Company acquired 100% of the outstanding common stock of Harbor. The purchase price consisted of both cash and stock. Each share of Harbor common stock was exchanged for $1.925 cash and 0.675 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on December 29, 2017, the resulting purchase price was $448,236.  

40

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The table below summarizes the purchase price calculation.

Number of shares of Harbor common stock outstanding at December 31, 2017		22,299,082
Per share exchange ratio		0.675
Number of shares of CenterState common stock less 241 of fractional shares		15,051,639
CenterState common stock price per share on December 29, 2017	$	25.73
Fair value of CenterState common stock issued	$	387,279
Number of shares of Harbor common stock outstanding at December 31, 2017		22,299,082
Cash consideration each Harbor share is entitled to receive	$	1.925
Total Cash Consideration plus $6 for 241 of fractional shares	$	42,932
Total Stock Consideration	$	387,279
Total Cash Consideration		42,932
Total consideration to be paid to Harbor common shareholders	$	430,211
Fair value of Harbor stock options converted to CenterState stock options	$	18,025
Total Purchase Price for Harbor	$	448,236

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the January 1, 2018 purchase date.

	January 1, 2018
Assets:
Cash and cash equivalents	$	77,176
Loans, held for investment		1,290,004
Purchased credit impaired loans		36,031
Loans held for sale		5,694
Investments		585,297
Accrued interest receivable		5,847
Branch real estate		34,035
Furniture and fixtures		3,571
Bank property held for sale		14,140
FHLB and other stock		9,488
Bank owned life insurance		39,089
Other real estate owned		5,144
Core deposit intangible		23,625
Goodwill		233,321
Deferred tax asset		14,071
Other assets		2,536
Total assets acquired	$	2,379,069
Liabilities:
Deposits	$	1,755,155
Federal Home Loan Bank advances		157,919
Corporate debentures		5,872
Accrued interest payable		478
Other liabilities		11,409
Total liabilities assumed	$	1,930,833

41

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

In the acquisition, the Company acquired $1,326,035 of loans at fair value, net of $40,438, or 3.0%, estimated discount to the outstanding principal balance, representing 27.8% of the Company’s total loans at December 31, 2017. Of the total loans acquired, management identified $36,031 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of January 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	67,107
Non-accretable difference		(25,951	)
Cash flows expected to be collected		41,156
Accretable yield		(5,125	)
Total purchased credit-impaired loans acquired	$	36,031

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	370,611	$	363,559
Commercial real estate		636,517		627,900
Construction/development/land		149,547		146,639
Commercial loans		113,818		110,630
Consumer and other loans		41,660		41,276
Purchased credit-impaired		54,320		36,031
Total earning assets	$	1,366,473	$	1,326,035

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $23,625, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of Charter Financial Corporation

On September 1, 2018, the Company completed its acquisition of Charter Financial Corporation (“Charter”) whereby Charter merged with and into the Company. Pursuant to and simultaneously with the merger of Charter with and into the Company, Charter’s wholly owned subsidiary bank, CharterBank, merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to expand its franchise into Georgia and Alabama, further solidify its market share in the Florida market and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale.  The acquisition increased the Company’s total assets and total deposits by approximately 24% as compared with the balances at December 31, 2017, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018, the Company incurred approximately $10,395 and $10,630 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $197,648 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date. Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available.   Fair value estimates on loans are deemed preliminary due to appraisals, other borrower financial information, and pending final reports from loan valuation specialists.  

42

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

The Company acquired 100% of the outstanding common stock of Charter. The purchase price consisted of both cash and stock. Each share of Charter common stock was exchanged for $2.30 cash and 0.738 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on August 31, 2018, the resulting purchase price was $389,476.  

The table below summarizes the purchase price calculation.

Number of shares of Charter common stock outstanding at August 31, 2018		15,480,776
Per share exchange ratio		0.738
Number of shares of CenterState common stock less 599 of fractional shares		11,424,214
CenterState common stock price per share on August 31, 2018	$	30.62
Fair value of CenterState common stock issued	$	349,809
Number of shares of Charter common stock outstanding at August 31, 2018		15,480,776
Cash consideration each Charter share is entitled to receive	$	2.300
Total Cash Consideration plus $17 for 599 of fractional shares	$	35,624
Total Stock Consideration	$	349,809
Total Cash Consideration		35,624
Total consideration to be paid to Charter common shareholders	$	385,433
Cash out of Charter stock options		4,043
Total Purchase Price for Charter	$	389,476

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the September 1, 2018 purchase date.

	September 1, 2018
Assets:
Cash and cash equivalents	$	184,020
Loans, held for investment		1,130,240
Purchased credit impaired loans		11,432
Loans held for sale		2,835
Investments		73,808
Accrued interest receivable		3,684
Branch real estate		27,930
Furniture and fixtures		1,988
Bank property held for sale		1,695
FHLB and other stock		1,483
Bank owned life insurance		54,813
Other real estate owned		257
Core deposit intangible		19,795
Goodwill		197,648
Deferred tax asset		1,966
Other assets		20,947
Total assets acquired	$	1,734,541
Liabilities:
Deposits	$	1,321,970
Corporate debentures		9,000
Accrued interest payable		1,015
Other liabilities		13,080
Total liabilities assumed	$	1,345,065

43

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

In the acquisition, the Company acquired $1,141,672 of loans at fair value, net of $23,118, or 2.0%, estimated discount to the outstanding principal balance, representing 23.9% of the Company’s total loans at December 31, 2017. Of the total loans acquired, management identified $11,432 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and some substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of September 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	33,687
Non-accretable difference		(20,763	)
Cash flows expected to be collected		12,924
Accretable yield		(1,492	)
Total purchased credit-impaired loans acquired	$	11,432

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	284,505	$	280,200
Commercial real estate		567,506		557,730
Construction/development/land		181,128		178,687
Commercial loans		88,308		87,062
Consumer and other loans		26,221		26,561
Purchased credit-impaired		17,122		11,432
Total earning assets	$	1,164,790	$	1,141,672

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $19,795, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Pro-forma information

Pro-forma data for the three month period ending September 30, 2017 listed in the table below presents pro-forma information as if the Gateway, Sunshine, Harbor and Charter acquisitions occurred at the beginning of 2017.  Pro-forma data for the nine month period ending September 30, 2017 listed in the table below presents pro-forma information as if the Platinum, Gateway, Sunshine, Harbor and Charter acquisitions occurred at the beginning of 2017.  Pro-forma data for the three and nine month periods ending September 30, 2018 listed in the table below presents pro-forma information as if the Charter acquisition occurred at the beginning of 2017.  

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Net interest income	$	112,182	$	109,779	$	339,786	$	315,211
Net income available to common shareholders	$	51,250	$	32,011	$	131,102	$	89,823
EPS - basic	$	0.54	$	0.34	$	1.38	$	0.96
EPS - diluted	$	0.53	$	0.33	$	1.36	$	0.94

The disclosures regarding the results of operations for Platinum, Gateway, Sunshine, Harbor and Charter subsequent to their respective acquisition dates are omitted as this information is not practical to obtain.  The Company converted Platinum, Gateway and Sunshine’s core systems in the same quarter as their respective acquisition date.  Although the Company did not convert Harbor’s core

44

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

system in the first quarter of 2018 or Charter’s core system in the third quarter of 2018, the majority of the fixed costs and purchase accounting entries were booked on the Company’s core system making it impractical to determine Harbor or Charter’s results of operation on a stand-alone basis.

NOTE 10:  Interest Rate Swap Derivatives

The Company enters into interest rate swaps in order to provide commercial loan clients the ability to swap from fixed to variable interest rates.  Under these agreements, the Company enters into a fixed-rate loan with a client in addition to a swap agreement.  This swap agreement effectively converts the client’s fixed rate loan into a variable rate.  The Company then enters into a matching swap agreement with a third party dealer in order to offset its exposure on the customer swap.  At September 30, 2018 and December 31, 2017, the notional amount of such arrangements was $5,044,615 and $3,740,430, respectively, and investment securities with a fair value of $0 and $19,048 were pledged as collateral to the third party dealers.  The Company pledged $5,236 and $16,991 of cash as collateral to the third party dealers at September 30, 2018 and December 31, 2017, respectively, in addition to the investment securities pledged.  As the interest rate swaps with the clients and third parties are not designated as hedges under ASC 815, changes in market values are reported in earnings.

Summary information about the interest rate swap derivative instruments is as follows:

	Sep. 30, 2018			Dec. 31, 2017
Notional amount	$	5,044,615		$	3,740,430
Weighted average pay rate on interest-rate swaps		3.49	%		3.00	%
Weighted average receive rate on interest rate swaps		3.48	%		3.00	%
Weighted average maturity (years)		11			11
Fair value of interest rate swap derivatives (asset)	$	87,946		$	42,480
Fair value of interest rate swap derivatives (liability)	$	88,065		$	43,259

NOTE 11:  Revenue from Contracts with Customers

On January 1, 2018, the Company adopted 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). ASU 2014-09 implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

The Company concluded that there is no change to the timing and pattern of revenue recognition for its current revenue streams in scope of Topic 606 or the presentation of revenue as gross versus net. No adjustment to retained earnings was required on the adoption date.  Because there is no change to the timing and pattern of revenue recognition, there are no material changes to the Company’s processes and internal controls.  Expanded disclosures including disaggregation of revenues and descriptions of performance obligations required by ASU 2014-09 are included below. The Company adopted ASU 2014-09 in the first quarter of 2018, and management determined during the assessment of the Company’s revenue streams that the adoption of ASU 2014-09 did not impact the Consolidated Financial Statements of the Company.  

There are two reasons ASU 2014-09 did not have an impact to the Company.  First, the majority of revenues are interest earned and gain on sales of loans, investment securities and other financial instruments, all of which are unaffected as they are outside the scope of ASU 2014-09.  Secondly, the Company’s non-interest income revenue streams such as service charges on deposits, treasury management fees, wealth advisory fees, fixed income sales, and correspondent bank fees, are all within the scope of ASU 2014-09.  However, ASC Topic 606 focuses on revenues from contracts earned over time, but all of these in-scope noninterest income revenue streams are governed by agreements that do not have an enforceable, contractual term.  Given the cancellable-at-will structure, ASC Topic 606 views these contracts as agreements-at-will without a defined term, the revenues of which are immediately recognized.  The revenue recognition timing is identical compared to previous revenue recognition standards.  

All of the Company’s revenue from contracts with customers in the scope of ASC 606 is recognized within Non-Interest Income.  ASU 2014-09 requires disclosure of sufficient information to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.  A description of the Company’s revenue streams accounted for under ASC 606 as well as an explanation of why they are not impacted are as follows:  

45

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

Revenues by Operating Segment/Line of Business

Service Charges on Deposit Accounts

The Company earns fees from its deposit customers for transaction-based, account maintenance, and overdraft services.  Transaction-based fees, which include but are not limited to: services such as ATM use fees, stop payment charges, statement rendering, ACH fees, are recognized at the time the transaction is executed as that is the point in time the Company fulfills the customer’s request.  Maintenance fees, which relate primarily to monthly maintenance, are earned over the course of a month, representing the period over which the Company satisfies the performance obligation.  Overdraft fees are recognized at the point in time that the overdraft occurs.  Service charges on deposits are withdrawn from the customer’s account balance.

Treasury Management

The Company earns fees for Treasury Management products and services which include but are not limited to online cash management, remote deposit capture, positive pay, and lockboxes.  Similar to the above service charges on deposit accounts above, these fees are also recognized at either the time the transaction or at the end of the month in the case where service obligations are provided over the course of each month.  Even though a customer’s Treasury Management agreement may provide for services over an indefinite period of time, the customer is free to end the agreement at will without penalty.  This structure is viewed as an at-will agreement under ASC 606, the revenues of which are recognized immediately.  

Wealth Management &Advisory

The Company has contracted with a third party to provide wealth management and investment brokerage services on behalf of the Company.  All fees earned by the Company from Wealth Management and Advisory activities are in the form of a revenue sharing agreement.  The Company acts as agent in this agreement, and as such, ASC 606 deems the third party to be the customer of the Company as opposed to those individual and entities receiving the wealth advisory services.  The agreed-upon portion of revenues generated by the third party for services provided other entities and individuals are owed and remitted to the Company at the end of each month, at which time all performance obligations of the Company are fulfilled.  

Correspondent Banking

The company earns revenues from a variety of services to other financial institutions including but not limited to correspondent banking, cash and clearing, safekeeping, wire transfers, international services, bond accounting, and others.  Fixed income sales are discussed separately.  While there is a significant variety of a la carte services, all (except fixed income sales) are either billed as incurred or are subject to monthly billing, at which point the performance obligation have been fulfilled.  Even though a Correspondent agreement may provide for services over an indefinite period of time, the customer is free to end the agreement at will without penalty.  This structure is viewed as an at-will agreement under ASC 606, the revenues of which are recognized immediately.  

Fixed Income Sales

The company earns commission revenues from the sale of fixed income securities to institutional investors.  These revenues are earned and collected at each individual sale, and the sale is the sole performance obligation.  There are no minimum orders or future performance obligations or deferred recognition requirements.  

Trust

The Company sold its Trust Department in December 2017.  While there would have been ASC Topic 606 revenue recognition timing implications, the sale prior to December 31, 2017 removed these revenues from consideration.  Trust revenues are displayed for prior periods only.  

Prepaid Cards

The Company earns revenues from prepaid card interchange fees and maintenance fees. Interchange fees from cardholder transactions represent a portion of the underlying transaction value and are recognized daily, concurrently with the transaction processing services to the cardholder.  Similar to fees from deposits accounts, maintenance fees are earned over the performance obligation period, after which all obligations have been fulfilled.  

Credit Cards

The Company earns revenues from a revenue sharing agreement with a third party who provides credit card services for Company customers.  Similar to the Wealth Management and Advisory revenue sharing agreement discussed above, the Company is the agent and the third party is the customer.  The revenue sharing agreement calculates fees owed to the Company based on

46

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

interchange and application amounts and levels.  These share of fees are remitted to the Company each month, at which time the performance obligation is fulfilled.  

Debit Card Interchange Income

The Company earns interchange fees from debit cardholder transactions through the MasterCard payment network.  Interchange fees form cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder. 

Gains/Losses on Sales of OREO

The Company records a gain or loss form the sale of OREO when control of the property transfers to the buyer, which generally occurs at the time of an executed deed.  There are no ASC 606 implications unless the Company finances the sale of OREO.  There are no instances of the Company financing the sale of one of its OREO properties as of September 30, 2018.  

Contract Balances

The Contract Balances disclosure requirement is not relevant, as no revenues are earned over time that would require the monitoring of contract balances.  The Performance Obligations disclosure requirements call for a description of when performance obligations are satisfied, significant payment terms, nature of goods or services promised, and obligations for returns, refunds, and warranties.  

NOTE 12:  Recently Issued Accounting Standards

In January 2016, the FASB issued ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities." This ASU addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments by making targeted improvements to GAAP as follows: (1) require equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer; (2) simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value; (3) eliminate the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities; (4) eliminate the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; (5) require public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (6) require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (7) require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; and (8) clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. ASU No. 2016-01 is effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted as of the beginning of the fiscal year of adoption only for provisions (3) and (6) above. Early adoption of the other provisions mentioned above is not permitted. Starting with the first quarter of 2018, the Company began using an exit price notion when measuring the fair value of its loan portfolio, excluding loans held for sale, for disclosure purposes.  The new guidance did not impact the Company's Consolidated Financial Statements.

In February 2016, the FASB issued ASU No. 2016-02, "Leases." Under this guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases): 1) a lease liability, which is the present value of a lessee's obligation to make lease payments, and 2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Lessor accounting under the new guidance remains largely unchanged as it is substantially equivalent to existing guidance for sales-type leases, direct financing leases, and operating leases. Leveraged leases have been eliminated, although lessors can continue to account for existing leveraged leases using the current accounting guidance. Other limited changes were made to align lessor accounting with the lessee accounting model and the new revenue recognition standard. All entities will classify leases to determine how to recognize lease-related revenue and expense. Quantitative and qualitative disclosures will be required by lessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The intention is to require enough information to supplement the amounts recorded in the financial statements so that users can understand more about the nature of an entity’s leasing activities. ASU No. 2016-02 is

47

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. All entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. Adoption of ASU 2016-02 is not expected to have a material impact on the Company's Consolidated Financial Statements.  The Company leases certain properties and equipment under operating leases that will result in the recognition of lease assets and lease liabilities on the Company’s Consolidated Balance Sheet.

In March 2016, the FASB issued ASU No. 2016-04, “Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products.” The amendments of this ASU narrowly address breakage, which is the monetary amount of the card that ultimately is not redeemed by the cardholder for prepaid stored-value products that are redeemable for monetary values of goods or services but may also be redeemable for cash. Examples of prepaid stored-value products included in this amendment are prepaid gift cards issued by specific payment networks and redeemable at network-accepting merchant locations, prepaid telecommunication cards, and traveler’s checks. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The Company adopted ASU 2016-04 during the first quarter of 2018 but there was no material impact to the financial statements as a result of the adoption of the new standard.

In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that aren’t measured at fair value through net income. In issuing the standard, the FASB is responding to criticism that today’s guidance delays recognition of credit losses. The standard will replace today’s “incurred loss” approach with an “expected loss” model. The new model, referred to as the current expected credit loss (“CECL”) model, will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held-to-maturity securities, loan commitments, and financial guarantees. The CECL model does not apply to available-for-sale (“AFS”) debt securities. For AFS debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a result, entities will recognize improvements to estimated credit losses immediately in earnings rather than as interest income over time, as they do today. The ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the allowance for loan and lease losses. In addition, entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted for interim and annual reporting periods beginning after December 15, 2018. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company formed a CECL committee to assist with the implementation process, selected a vendor to assist with the implementation process, and is currently evaluating the provisions of ASU No. 2016-13 to determine the potential impact the new standard will have on the Company's Consolidated Financial Statements, including different methodologies that may be employed to estimate credit losses as well as additional data gathering that will be needed to adopt the standard.  The standard will add new disclosures related to factors that influenced management’s estimate, including current expected credit losses, the changes in those factors, and reasons for the changes as well as the method applied to revert to historical credit loss experience, and the Company expects to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the beginning of the first reporting period in which the new standard is effective, but has not yet determined the magnitude of any such one-time adjustment or the overall impact on the Company’s Financial Statements.

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in generally accepted accounting principles. The exception has led to diversity in practice and is a source of complexity in financial reporting. FASB decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this update eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. The amendments in this update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The new guidance effective January 1, 2018 does not have a material impact on the Consolidated Financial Statements.

In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” The amendments in this update provide a more robust framework to use in determining when a set of assets and activities

48

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

is a business. Because the current definition of a business is interpreted broadly and can be difficult to apply, stakeholders indicated that analyzing transactions is inefficient and costly and that the definition does not permit the use of reasonable judgment. The amendments provide more consistency in applying the guidance, reduce the costs of application, and make the definition of a business more operable. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The Company adopted ASU 2017-01 but there was no impact to the financial statements as a result of the adoption of the new standard.

In January 2017, the FASB issued ASU No. 2017-04, “Simplifying the Test for Goodwill Impairment,” to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. In computing the implied fair value of goodwill under Step 2, an entity had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities (including unrecognized assets and liabilities) following the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination. Instead, under the amendments in this update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable.  FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. Therefore, the same impairment assessment applies to all reporting units. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements, but it is not expected to have a material impact.

In May 2017, the FASB issued ASU 2017-09, “Scope of Modification Accounting,” to provide clarity and reduce both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, “Compensation—Stock Compensation,” to a change to the terms or conditions of a share-based payment award.  The amendments in this update provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all the following are met: (1) the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified. If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification; (2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified; (3) the  classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The current disclosure requirements in Topic 718 apply regardless of whether an entity is required to apply modification accounting under the amendments in this update.  For public business entities, the amendments in this update become effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. An entity should apply the amendments in this update prospectively to an award modified on or after the adoption date. The Company adopted the new guidance but it did not have a material impact on the Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.”  The amendments in this update more closely align the results of cash flow and fair value hedge accounting with risk management activities through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results in the financial statements. The amendments address specific limitations in current GAAP by expanding hedge accounting for both nonfinancial and financial risk components and by refining the measurement of hedge results to better reflect an entity’s hedging strategies. Thus, the amendments will enable an entity to report more faithfully the economic results of hedging activities for certain fair value and cash flow hedges and will avoid mismatches in earnings by allowing for greater precision when measuring changes in fair value of the hedged item for certain fair value hedges. Additionally, by aligning the timing of recognition of hedge results with the earnings effect of the hedged item for cash flow and net investment hedges, and by including the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is presented, the results of an entity’s hedging program and the cost of executing that program will be more visible to users of financial statements. Overall, those amendments are an improvement because an entity’s financial statements will reflect more accurately and comprehensively the intent and outcome of its hedging strategies. The tabular disclosure related to effects on the income statement of fair value and cash flow hedges and the disclosure of cumulative basis adjustments for fair value hedges provide

49

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

users with a more complete picture of the effect of hedge accounting on an entity’s income statement and balance sheet. When considered together, the amendments to presentation and disclosures are an improvement because they will provide users with more decision-useful information about the effect of an entity’s risk management activities on the financial statements. Additionally, the amendments in this Update should ease the operational burden of applying hedge accounting by allowing more time to prepare hedge documentation and, allowing effectiveness assessments to be performed on a qualitative basis after hedge inception. For public business entities, the amendments in this update become effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. All transition requirements and elections should be applied to hedging relationships existing (that is, hedging relationships in which the hedging instrument has not expired, been sold, terminated, or exercised or the entity has not removed the designation of the hedging relationship) on the date of adoption. The effect of adoption should be reflected as of the beginning of the fiscal year of adoption (that is, the initial application date). For cash flow and net investment hedges existing at the date of adoption, an entity should apply a cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the amendments in this Update. The amended presentation and disclosure guidance is required only prospectively. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, “Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”.  On December 22, 2017, the U.S. federal government enacted the Tax Act.  Stakeholders in the banking and insurance industries expressed concern about the guidance in current generally accepted accounting principles (GAAP) that requires deferred tax liabilities and assets to be adjusted for the effect of a change in tax laws or rates with the effect included in income from continuing operations in the reporting period that includes the enactment date. That guidance is applicable even in situations in which the related income tax effects of items in accumulated other comprehensive income were originally recognized in other comprehensive income (rather than in income from continuing operations).  Those stakeholders asserted that because the adjustment of deferred taxes due to the reduction of the historical corporate income tax rate to the newly enacted corporate income tax rate is required to be included in income from continuing operations, the tax effects of items within accumulated other comprehensive income (referred to as stranded tax effects) do not reflect the appropriate tax rate. The amendments in this update affect any entity that is required to apply the provisions of Topic 220, Income Statement—Reporting Comprehensive Income, and has items of other comprehensive income for which the related tax effects are presented in other comprehensive income as required by GAAP.  The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Act. Consequently, the amendments eliminate the stranded tax effects resulting from the Tax Act and will improve the usefulness of information reported to financial statement users. The amendments only relate to the reclassification of the income tax effects of the Tax Act; the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected.  The amendments in this update also require certain disclosures about stranded tax effects. The amendments in this update are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of the amendments in this update is permitted, including adoption in any interim period, for public business entities for reporting periods for which financial statements have not yet been issued.  The amendments in this update should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Act is recognized. The Company early adopted this update which resulted in a reclassification of $1,241 from accumulated other comprehensive income to retained earnings for stranded tax effects for the year ended December 31, 2017.

In June 2018, the FASB issued ASU No. 2018-07, “Compensation – Stock Compensation (Topic 718) - Improvements to Nonemployee Share-Based Payment Accounting,” to include share based payment transactions for acquiring goods and services from nonemployees. An entity should apply the requirements of Topic 718 to nonemployee awards except for specific guidance on inputs to an option pricing model and the attribution of cost (that is, the period of time over which share-based payment awards vest and the pattern of cost recognition over that period). The amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. The amendments also clarify that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Topic 606, Revenue from Contracts with Customers. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2018 but no earlier than an entity’s adoption date of Topic 606. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements, but it is not expected to have a material impact.

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820) - Changes to the Disclosure Requirements for Fair Value Measurement,” to modify the disclosure requirements on fair value measurements in Topic 820 based on the concepts in the Concepts Statement, including the consideration of costs and benefits. The following disclosure requirements were removed from Topic 820: (1) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; (2) the

50

CenterState Bank Corporation and Subsidiaries

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

(in thousands of dollars, except per share data)

policy for timing of transfers between levels; (3) the valuation processes for Level 3 fair value measurements; and (4) for nonpublic entities, the changes in unrealized gains and losses for the period included in earnings for recurring Level 3 fair value measurements held at the end of the reporting period.  The following disclosure requirements were modified in Topic 820: (1) in lieu of a rollforward for Level 3 fair value measurements, a nonpublic entity is required to disclose transfers into and out of Level 3 of the fair value hierarchy and purchases and issues of Level 3 assets and liabilities; (2) for investments in certain entities that calculate net asset value, an entity is required to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly; and (3) the amendments clarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The following disclosure requirements were added to Topic 820: (1) the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period; (2) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information (such as the median or arithmetic average) in lieu of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. The amendments in this update are effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. Early adoption is permitted upon issuance of this update. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this update and delay adoption of the additional disclosures until their effective date. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements, but it is not expected to have a material impact.

51

ITEM 2:MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

(All dollar amounts presented herein are in thousands, except per share data, or unless otherwise noted.)

Cautionary Note Regarding Any Forward-Looking Statements

Some of the statements made in this report are “forward-looking statements” within the meaning of the Securities Act of 1933 (the “Securities Act”) and the Securities Exchange Act of 1934 (the “Exchange Act”). Forward-looking statements include statements with respect to our beliefs, plans, objectives, goals, expectations, anticipations, assumptions, estimates, intentions and future performance and involve known and unknown risks, uncertainties and other factors, many of which may be beyond our control and which may cause the actual results, performance or achievements of the Company to be materially different from future results, performance or achievements expressed or implied by such forward-looking statements.

All statements other than statements of historical fact are statements that could be forward-looking statements. You can identify these forward-looking statements through our use of words such as “may,” “will,” “anticipate,” “assume,” “should,” “indicate,” “would,” “believe,” “contemplate,” “expect,” “estimate,” “continue,” “plan,” “point to,” “project,” “predict,” “could,” “intend,” “target,” “potential” and other similar words and expressions of the future. These forward-looking statements may not be realized due to a variety of factors, including, without limitation, the impact on failing to implement our business strategy, including our growth and acquisition strategy, including our most recent merger with Charter, any litigation that has been or might be filed in connection with our merger with Charter; the ability to successfully integrate our acquisitions; additional capital requirements due to our growth plans; the impact of an increase in our asset size to over $10 billion; the risks of changes in interest rates and the level and composition of deposits, loan demand, the credit and other risks in our loan portfolio and the values of loan collateral; the impact of us not being able to manage our risk; the impact on a loss of management or other experienced employees; the impact if we failed to maintain our culture and attract and retain skilled people; the risk of changes in technology and customer preferences; the impact of any material failure or breach in our infrastructure or the infrastructure of third parties on which we rely including as a result of cyber-attacks; or material regulatory liability in areas such as BSA or consumer protection; reputational risks from such failures or liabilities or other events; legislative and regulatory changes; political, legal and economic conditions and developments; financial market conditions and the results of financing efforts; changes in commodity prices and interest rates; weather, natural disasters and other catastrophic events; and other factors discussed in our filings with the Securities and Exchange Commission under the Exchange Act.

All written or oral forward-looking statements that are made by or are attributable to us are expressly qualified in their entirety by this cautionary notice. Our forward-looking statements apply only as of the date of this report or the respective date of the document from which they are incorporated herein by reference. We have no obligation and do not undertake to update, revise or correct any of the forward-looking statements after the date of this report, or after the respective dates on which such statements otherwise are made, whether as a result of new information, future events or otherwise.

COMPARISON OF BALANCE SHEETS AT SEPTEMBER 30, 2018 AND DECEMBER 31, 2017

Overview

Our total assets increased approximately 72% from December 31, 2017 to September 30, 2018, to approximately $12.3 billion, primarily due to the acquisitions of Sunshine and Harbor, both transactions closed on January 1, 2018, and the acquisition of Charter completed on September 1, 2018.  In addition to the growth through acquisitions and the sale of deposits from the divestiture of one branch during the third quarter of 2018, organic loan growth during the period was 5% annualized, supported by deposit growth of $143,180, or 2% annualized.  Our loan to deposit ratio was 86.8% and 85.8% at September 30, 2018 and December 31, 2017, respectively.

Due to consolidated assets in excess of $10 billion, the Company is now subject to additional regulations and oversight that can affect our revenues and expenses. Such regulations and oversight include increased expectations with respect to risk management internal audit, and information security, enhanced stress testing as a component of liquidity and capital planning, transfer of examination over compliance with consumer and small business laws from the Office of the Comptroller of the Currency to the Consumer Financial Protection Bureau (“CFPB”), increased deposit insurance premium assessments based on a new scorecard issued by the FDIC, and no longer being exempt from the requirements of the Federal Reserve’s rules limiting certain  interchange transaction fees for debit cards on institutions over $10 billion in assets. We expect to expend additional resources to comply with these and other additional applicable regulatory requirements. Increased deposit insurance assessments can result in increased expense related to our use of deposits as a funding source. Likewise, a reduction in the amount of interchange fees we receive for electronic debit interchange will reduce our revenues. Finally, a failure to meet prudential risk management and capital planning standards or compliance with consumer lending laws could, among other things, limit our ability to engage in expansionary activities or make dividend payments to our shareholders.

52

Federal funds sold and Federal Reserve Bank deposits

Federal funds sold and Federal Reserve Bank deposits were $488,152 at September 30, 2018 (approximately 4% of total assets) as compared to $195,057 at December 31, 2017 (approximately 3% of total assets). We use our available-for-sale securities portfolio, as well as federal funds sold and Federal Reserve Bank deposits for liquidity management and for investment yields. These accounts, as a group, will fluctuate as a function of loans outstanding, and to some degree the amount of correspondent bank deposits (i.e. federal funds purchased) outstanding.

Investment securities available for sale

Securities available-for-sale, consisting primarily of U.S. government sponsored enterprises and municipal tax exempt securities, were $1,536,842 at September 30, 2018 (approximately 13% of total assets) compared to $1,060,143 at December 31, 2017 (approximately 15% of total assets), an increase of $476,699 or 45%, which was mainly attributable to securities acquired from Harbor. We use our available-for-sale securities portfolio, as well as federal funds sold and Federal Reserve Bank deposits for liquidity management and for investment yields. These accounts, as a group, will fluctuate as a function of loans outstanding as discussed above, under the caption “Federal funds sold and Federal Reserve Bank deposits.” We classify the majority of our securities as “available for sale” to provide for greater flexibility to respond to changes in interest rates as well as future liquidity needs.  Our available for sale securities are carried at fair value.

Trading securities

We also have a trading securities portfolio. Realized and unrealized gains and losses are included in trading securities revenue, a component of our non interest income, in our Condensed Consolidated Statement of Income and Comprehensive Income. Securities purchased for this portfolio have primarily been various municipal securities. A list of the activity in this portfolio is summarized below.

	Three month periods ended						Nine month periods ended
	Sep. 30, 2018			Sep. 30, 2017			Sep. 30, 2018			Sep. 30, 2017
Beginning balance	$	1,848		$	—			6,777		$	12,383
Purchases		47,011			42,421			234,190			186,523
Proceeds from sales		(48,849	)		(39,485	)		(240,979	)		(196,125	)
Net realized gain on sales		(10	)	10				12		165
Net unrealized gains		—			27			—			27
Ending balance	$	—		$	2,973		$	—		$	2,973

Investment securities held to maturity

At September 30, 2018, we had $219,850 (unamortized cost basis) of securities with an estimated fair value of $211,262, resulting in a net unrecognized loss of $8,588, compared to $232,399 (unamortized cost basis) of securities with an estimated fair value of $231,615 and a net unrecognized loss of $784 at December 31, 2017.  This portfolio generally holds longer term securities for the primary purpose of yield.  This classification was chosen to minimize temporary effects on our tangible equity and tangible equity ratio due to increases and decreases in general market interest rates.

Loans held for sale

We also have a mortgage loans held for sale portfolio, whereby we originate single family home loans and sell those mortgages into the secondary market, servicing released. For periods prior to December 31, 2017, mortgage loans held for sale were valued at the lower of cost or fair value.  Effective January 1, 2018, the Company elected to account for these loans under the fair value option with changes in fair value recognized in current period earnings.  At the date of funding of the loan, the funded amount of the loan, the relative derivative asset or liability of the associated interest rate lock commitment, less direct costs, becomes the initial recorded investment in the loan held for sale.  Such amount approximates the fair value of the loan.  This change was accounted for on a prospective basis.  Net gains from changes in estimated fair value of mortgage loans held for sale were $723 at September 30, 2018. Gains and losses on the sale of mortgage loans held for sale and changes in fair value are included as a components of mortgage banking revenue which are reported in non-interest income in our Condensed Consolidated Statement of Income and Comprehensive Income.

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The table below presents the activity in this portfolio for the periods indicated.

	Three month periods ended						Nine month periods ended
	Sep. 30, 2018			Sep. 30, 2017			Sep. 30, 2018			Sep. 30, 2017
Beginning balance	$	36,366		$	8,959		$	19,647		$	2,285
Effect from acquisitions		2,835			—			8,959			—
Loans originated		91,910			23,444			242,226			53,806
Proceeds from sales		(94,226	)		(20,564	)		(238,613	)		(44,780	)
Change in fair value		1			—			723			—
Net realized gain on sales		2,668		404				6,612			932
Ending balance	$	39,554		$	12,243		$	39,554		$	12,243

Loans

Lending-related income is the most important component of our net interest income and is a major contributor to profitability. The loan portfolio is the largest component of earning assets, and it therefore generates the largest portion of revenues. The absolute volume of loans and the volume of loans as a percentage of earning assets is an important determinant of net interest margin as loans are expected to produce higher yields than securities and other earning assets. Average loans during the nine month period ended September 30, 2018, were $7,096,5500  or 78.0% of average earning assets, as compared to $4,192,226 , or 76.6%  of average earning assets, for the nine month period ending September 30, 2017. Total loans at September 30, 2018 and December 31, 2017 were $8,223,092 and $4,773,221, respectively. This represents a loan to total asset ratio of 67.0% and 67.0% and a loan to deposit ratio of 86.8% and 85.8%, at September 30, 2018 and December 31, 2017, respectively.

Non-PCI loans

At September 30, 2018, we have total non-PCI loans of $8,055,421.  Total new loans originated during the nine month period ended September 30, 2018 approximated $1.6 billion, of which $1.1 billion were funded at the time of origination. About 30% of funded loan origination was non-owner occupied commercial real estate (“CRE”); 20% owner occupied CRE, 18% single family residential, 18% commercial and industrial (“C&I”), 9% land, development & construction and 5% were all other. Approximately 18% of the funded loan production was floating rate, 31% was other variable rate and 51% was fixed rate.  The weighted average tax equivalent interest rate on funded loans was approximately 4.80% during the nine month period.  The loan origination pipeline is approximately $567 million at September 30, 2018 compared to $564 million at December 31, 2017.  

The graph below summarizes new loan originations and funded loan production, excluding acquired loans purchased pursuant to acquisitions, over the past nine quarters.  

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PCI loans

Total Purchased Credit Impaired (“PCI”) loans at September 30, 2018 were $167,671 compared to $164,158 at December 31, 2017.  

Loan concentrations are considered to exist where there are amounts loaned to multiple borrowers engaged in similar activities, which collectively could be similarly impacted by economic or other conditions and when the total of such amounts would exceed 25% of total capital. Due to the lack of diversified industry and the relative proximity of markets served, the Company has concentrations in geographic as well as in types of loans funded.

Total loans at September 30, 2018 were $8,223,092. Of this amount, approximately 84.1% are collateralized by real estate, 13.5% are commercial non real estate loans and the remaining 2.4% are consumer and other non real estate loans. We have $1,775,600 of single family residential loans which represents about 22.0% of our total loan portfolio. Our largest category of loans is commercial real estate which represents approximately 54.6% of our total loan portfolio.

The following table sets forth information concerning the loan portfolio by collateral types as of the dates indicated.

	September 30, 2018			December 31, 2017
Loans excluding PCI loans
Real estate loans
Residential	$	1,713,093		$	1,025,303
Commercial		4,395,351			2,546,143
Land, development and construction		645,885			235,816
Total real estate		6,754,329			3,807,262
Commercial		1,104,392			693,501
Consumer and other loans		194,603			107,480
Loans before unearned fees and deferred cost		8,053,324			4,608,243
Net unearned fees and costs		2,097			820
Total loans excluding PCI loans		8,055,421			4,609,063
PCI loans (note 1)
Real estate loans
Residential		62,507			59,975
Commercial		92,444			92,791
Land, development and construction		6,955			6,656
Total real estate		161,906			159,422
Commercial		5,479			4,444
Consumer and other loans		286			292
Total PCI loans		167,671			164,158
Total loans		8,223,092			4,773,221
Allowance for loan losses for loans that are not PCI loans		(38,595	)		(32,530	)
Allowance for loan losses for PCI loans		(216	)		(295	)
Total loans, net of allowance for loan losses	$	8,184,281		$	4,740,396

note 1: PCI loans are accounted for pursuant to ASC Topic 310-30.

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The table below summarizes the Company’s loan mix for the periods presented.

	September 30, 2018		December 31, 2017
Originated Loans
Real estate loans
Residential	$	767,350	$	656,073
Commercial		1,907,497		1,489,706
Land, development and construction loans		227,573		134,748
Total real estate loans		2,902,420		2,280,527
Commercial loans		722,235		535,777
Consumer and other loans		135,644		102,226
Total loans before unearned fees and costs		3,760,299		2,918,530
Unearned fees and costs		2,097		820
Total originated loans		3,762,396		2,919,350
Acquired Loans (1)
Real estate loans
Residential		945,743		369,230
Commercial		2,487,854		1,056,437
Land, development and construction loans		418,312		101,068
Total real estate loans		3,851,909		1,526,735
Commercial loans		382,157		157,724
Consumer and other loans		58,959		5,254
Total acquired loans		4,293,025		1,689,713
PCI loans
Real estate loans
Residential		62,507		59,975
Commercial		92,444		92,791
Land, development and construction loans		6,955		6,656
Total real estate loans		161,906		159,422
Commercial loans		5,479		4,444
Consumer and other loans	286		292
Total PCI loans		167,671		164,158
Total Loans	$	8,223,092	$	4,773,221

(1) Acquired loans include the non-PCI loans purchased pursuant to the following acquisitions:

• Branch and loan transaction from TD Bank (year 2011);

• Federal Trust Bank acquisition (year 2011);

• Gulfstream Business Bank acquisition (year 2014);

• First Southern Bank acquisition (year 2014);

• Community Bank of South Florida acquisition (year 2016);

• Hometown of Homestead Banking Company acquisition (year 2016);

• Platinum Bank Holding Company (year 2017);

• Gateway Financial Holdings of Florida, Inc. (year 2017);

• Sunshine Bancorp, Inc. (year 2018);

• HCBF Holding Company, Inc. (year 2018); and

• Charter Financial Corporation (year 2018)

Credit quality and allowance for loan losses

We maintain an allowance for loan losses that we believe is adequate to absorb probable losses incurred in our loan portfolio.  The allowance is increased by the provision for loan losses, which is a charge to current period earnings and decreased by loan charge-offs net of recoveries of prior period loan charge-offs.  Loans are charged against the allowance when management believes collection of the principal is unlikely.  

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The allowance consists of three components. The first component is an allocation for impaired loans, as defined by ASC 310.  Impaired loans are those loans whereby management has arrived at a determination that the Company will not be repaid according to the original terms of the loan agreement. Each of these loans is required to have a written analysis supporting the amount of specific allowance allocated to the particular loan, if any. That is to say, a loan may be impaired (i.e., not expected to be repaid as agreed), but may be sufficiently collateralized such that we expect to recover all principal and interest eventually, and therefore no specific allowance is warranted.

Commercial, commercial real estate, land, land development and construction loans in excess of $500 are monitored and evaluated for impairment on an individual loan basis. Commercial, commercial real estate, land, land development and construction loans less than $500 are evaluated for impairment on a pool basis. All consumer and single family residential loans are evaluated for impairment on a pool basis.

On at least a quarterly basis, management reviews each impaired loan to determine whether it should have a specific reserve or partial charge-off. Management relies on appraisals to help make this determination. Updated appraisals are obtained for collateral dependent loans when a loan is scheduled for renewal or refinance. In addition, if the classification of the loan is downgraded to substandard, identified as impaired, or placed on nonaccrual status (collectively “Problem Loans”), an updated appraisal is obtained if the loan amount is greater than $500 and individually evaluated for impairment.

After an updated appraisal is obtained for a Problem Loan, as described above, an additional updated appraisal will be obtained on at least an annual basis. Thus, current appraisals for Problem Loans in excess of $500 will not be older than one year.

After the initial updated appraisal is obtained for a Problem Loan and before its next annual appraisal update is due, management considers the need for a downward adjustment to the current appraisal amount to reflect current market conditions, based on management’s analysis, judgment and experience. In an extremely volatile market, we may update the appraisal prior to the one year anniversary date.

The second component is a general allowance on all of the Company’s loans other than PCI loans and those identified as impaired. The general component covers non-impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by portfolio segment and is based on the actual loss history experienced by the Company over the most recent two years. The portfolio segments identified by the Company are residential loans, commercial real estate loans, construction and land development loans, commercial and industrial and consumer and other. This actual loss experience is supplemented with other economic factors based on the risks present for each portfolio segment. These economic, or qualitative, factors include consideration of the following: levels of and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards; other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; levels and trends in special mention and substandard loans; and effects of changes in credit concentrations.

The third component consists of amounts reserved for purchased credit impaired loans. On a quarterly basis, the Company updates the amount of loan principal and interest cash flows expected to be collected, incorporating assumptions regarding default rates, loss severities, the amounts and timing of prepayments and other factors that are reflective of current market conditions. Probable decreases in expected loan principal cash flows trigger the recognition of impairment, which is then measured as the present value of the expected principal loss plus any related foregone interest cash flows discounted at the pool’s effective interest rate. Impairments that occur after the acquisition date are recognized through the provision for loan losses. Probable and significant increases in expected principal cash flows would first reverse any previously recorded allowance for loan losses; any remaining increases are recognized prospectively as interest income. The impacts of (i) prepayments, (ii) changes in variable interest rates, and (iii) any other changes in the timing of expected cash flows are recognized prospectively as adjustments to interest income. Disposals of loans, which may include sales of loans, receipt of payments in full by the borrower, or foreclosure, result in removal of the loan from the PCI portfolio. The aggregate of these three components results in our total allowance for loan losses.

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In the table below we have shown the components, as discussed above, of our allowance for loan losses at September 30, 2018 and December 31, 2017.

	Sep. 30, 2018							Dec. 31, 2017							increase (decrease)
	Loan		ALLL					Loan		ALLL					Loan			ALLL
	balance		balance		%			balance		balance		%			balance			balance
Originated loans	$	3,748,984		35,207		0.94	%	$	2,902,904	$	29,385		1.01	%	$	846,080		$	5,822		(7	)	bps
Impaired originated loans		13,412		1,081		8.06	%		16,446		804		4.89	%		(3,034	)		277		317		bps
Total originated loans		3,762,396		36,288		0.96	%		2,919,350		30,189		1.03	%		843,046			6,099		(7	)	bps
Acquired loans (2)		4,289,269		1,975		0.05	%		1,685,814		2,341		0.14	%		2,603,455			(366	)	(9	)	bps
Impaired acquired loans (1)		3,756		332		8.84	%		3,899		—		—			(143	)		332		884		bps
Total acquired loans		4,293,025		2,307		0.05	%		1,689,713		2,341		0.14	%		2,603,312			(34	)	(9	)	bps
Total non-PCI loans		8,055,421		38,595					4,609,063		32,530					3,446,358			6,065
PCI loans		167,671		216					164,158		295					3,513			(79	)
Total loans	$	8,223,092	$	38,811				$	4,773,221	$	32,825				$	3,449,871		$	5,986

(1) These are loans that were acquired as performing loans that subsequently became impaired.

(2) These are performing acquired loans that were recorded at estimated fair value on the related acquisition dates.  The total net unamortized fair value adjustment at September 30, 2018 was approximately $54,958 or 1.3% of the aggregate outstanding related loan balances.  Acquired loans currently include performing loans acquired from the TD Bank acquisition (year 2011), the Federal Trust acquisition (year 2011), the Gulfstream Bank acquisition (year 2014), the First Southern Bank acquisition (year 2014), the Community Bank acquisition (year 2016), the Hometown of Homestead Banking Company acquisition (year 2016), the Platinum Bank acquisition (year 2017), the Gateway Bank acquisition (year 2017), the Sunshine Bank acquisition (year 2018), the Harbor Community Bank acquisition (year 2018) and the CharterBank acquisition (year 2018).      

The general loan loss allowance relating to originated loans increased by $6,099 resulting primarily from an increase in loans outstanding of $843,046. Net changes resulting from a mixture of decreases and increases in the Company’s various two year historical loss factors and qualitative factors also slightly affected the net change in the general loan loss allowance.  

The general loan loss allowance relating to acquired loans (non-impaired loans) decreased by $34 resulting primarily from a decline in loans outstanding, excluding the three bank acquisitions closed in 2018.   At September 30, 2018 the non-impaired loans acquired from these three acquisitions were equal to approximately $2.8 billion. These loans were recorded at estimated fair value at acquisition date. As such, there is no allowance for loan losses associated with these loans as of September 30, 2018. The unamortized acquisition date fair value adjustment related to these loans at September 30, 2018 was approximately $40,043, or 1.4% of the related aggregate outstanding loan balances.     

The specific loan loss allowance (impaired loans) for both originated loans and acquired loans is the aggregate of the results of individual analyses prepared for each one of the impaired loans, excluding PCI loans.  Total impaired loans at September 30, 2018 are equal to $17,168 ($13,412 originated impaired loans plus $3,756 acquired impaired loans).  

The Company recorded partial charge offs in lieu of specific allowance for a number of the impaired loans.   The Company’s impaired loans have been written down by $905 to $17,168 ($15,755 when the $1,413 specific allowance is considered) from their legal unpaid principal balance outstanding of $18,073.  In the aggregate, total impaired loans have been written down to approximately 87% of their legal unpaid principal balance, and non-performing impaired loans have been written down to approximately 82% of their legal unpaid principal balance.  Approximately $9,204 of the Company’s impaired loans, or 54% of total impaired loans, are accruing performing loans.  This group of impaired loans is not included in the Company’s non-performing loans or non-performing assets categories.  

PCI loans are accounted for pursuant to ASC Topic 310-30.  PCI loan pools are evaluated for impairment each quarter.  If a pool is impaired, an allowance for loan loss is recorded. PCI loans had a remaining unpaid principal balance of $236,345 and unamortized fair value adjustment of $68,674, which represents 29% of unpaid principal balance, at September 30, 2018.

The allowance is increased by the provision for loan losses, which is a charge to current period earnings and decreased by loan charge-offs net of recoveries of prior period loan charge-offs. Loans are charged against the allowance when management believes collection of the principal is unlikely. We believe our allowance for loan losses was adequate at September 30, 2018. However, we

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recognize that many factors can adversely impact various segments of the Company’s markets and customers, and therefore there is no assurance as to the amount of losses or probable losses which may develop in the future.

The tables below summarize the changes in allowance for loan losses during the periods presented.

	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Three months ended September 30, 2018
Balance at beginning of period	$	37,209		$	275		$	37,484
Loans charged-off		(1,178	)		—			(1,178	)
Recoveries of loans previously charged-off		555			—			555
Net recoveries		(623	)		—			(623	)
Provision for loan losses		2,009			(59	)		1,950
Balance at end of period	$	38,595		$	216		$	38,811
Three months ended September 30, 2017
Balance at beginning of period	$	29,769		$	363		$	30,132
Loans charged-off		(472	)		—			(472	)
Recoveries of loans previously charged-off		1,072			—			1,072
Net recoveries		600			—			600
Provision for loan losses		1,174			(78	)		1,096
Balance at end of period	$	31,543		$	285		$	31,828
	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Nine months ended September 30, 2018
Balance at beginning of period	$	32,530		$	295		$	32,825
Loans charged-off		(2,170	)		—			(2,170	)
Recoveries of loans previously charged-off		1,898			75			1,973
Net recoveries		(272	)		75			(197	)
Provision for loan losses		6,337			(154	)		6,183
Balance at end of period	$	38,595			216		$	38,811
Nine months ended September 30, 2017
Balance at beginning of period	$	26,569		$	472		$	27,041
Loans charged-off		(1,722	)		—			(1,722	)
Recoveries of loans previously charged-off		2,454			65			2,519
Net recoveries		732			65			797
Provision for loan losses		4,242			(252	)		3,990
Balance at end of period	$	31,543		$	285		$	31,828

Nonperforming loans and nonperforming assets

Non-performing loans exclude PCI loans and are defined as non-accrual loans plus loans past due 90 days or more and still accruing interest. Generally, we place loans on non-accrual status when they are past due 90 days and management believes the borrower’s financial condition, after giving consideration to economic conditions and collection efforts, is such that collection of interest is doubtful. When we place a loan on non-accrual status, interest accruals cease and uncollected interest is reversed and charged against current income. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Non-performing loans, as defined above, as a percentage of total non-PCI loans, were 0.29% at September 30, 2018, compared to 0.38% at December 31, 2017.

Non-performing assets (which we define as non-performing loans, as defined above, plus (a) OREO (i.e., real estate acquired through foreclosure, in substance foreclosure, or deed in lieu of foreclosure); and (b) other repossessed assets that are not real estate), were $28,619  at September 30, 2018, compared to $21,422  at December 31, 2017. Non-performing assets as a percentage of total assets were 0.23%   at September 30, 2018, compared to 0.30%  at December 31, 2017. The table below summarizes selected credit quality data at the dates indicated.

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The table below summarizes selected credit quality data at the dates indicated.

	Sep. 30, 2018			Dec. 31, 2017
Non-accrual loans (note 1)	$	23,450		$	17,288
Accruing loans 90 days or more past due (note 1)		—			—
Total non-performing loans ("NPLs") (note 1)		23,450			17,288
Other real estate owned ("OREO")		4,643			3,987
Repossessed assets other than real estate ("ORAs") (note 1)		526		147
Total NPAs	$	28,619		$	21,422
NPLs as percentage of total loans (note 1)		0.29	%		0.38	%
NPAs as percentage of total assets		0.23	%		0.30	%
NPAs as percentage of loans and OREO and ORAs (note 1)		0.36	%		0.46	%
30-89 days past due accruing loans as percentage of total loans (note 1)		0.35	%		0.30	%
Allowance for loan losses as percentage of NPLs (note 1)		165	%		188	%

note 1: Excludes PCI loans.

As shown in the table above, the largest component of non-performing loans is non-accrual loans. As of September 30, 2018 the Company had non-accrual loans with an aggregate book value of $23,450 compared to December 31, 2017 when an aggregate book value of $17,288 was reported.

The second largest component of non-performing assets after non-accrual loans is OREO. At September 30, 2018, total OREO was $4,643 compared to $3,987 at December 31, 2017.  OREO is carried at the lower of cost or market less the estimated cost to sell. Further declines in real estate values can affect the market value of these assets. Any further decline in market value beyond its cost basis is recorded as a current expense in the Company’s Condensed Consolidated Statement of Income and Comprehensive Income.  

Impaired loans are defined as loans that management has determined will not repay as agreed pursuant to the terms of the related loan agreement. Small balance homogeneous loans are not considered for impairment purposes. Once management has determined a loan is impaired, we perform a specific reserve analysis to determine if it is probable that we will eventually collect all contractual cash flows. If management determines that a shortfall is probable, then a specific valuation allowance is placed against the loan. This loan is then placed on non-accrual basis, even if the borrower is current with his/her contractual payments, and will remain on non-accrual until payments collected reduce the loan balance such that it eliminates the specific valuation allowance or equivalent partial charge-down or other economic conditions change. At September 30, 2018, we identified a total of $17,168 in impaired loans, excluding PCI loans. A specific valuation allowance of $1,413 has been attached to $5,603 of impaired loans included in the total $17,168 of identified impaired loans. It should also be noted that the total carrying balance of the impaired loans, or $17,168, has been partially charged down by $905 from their aggregate legal unpaid balance of $18,073.

The table below summarizes impaired loan data for the periods presented.

	Sep. 30, 2018		Dec. 31, 2017
Impaired loans with a specific valuation allowance	$	5,603	$	4,004
Impaired loans without a specific valuation allowance		11,565		16,341
Total impaired loans	$	17,168	$	20,345
Performing TDRs (these are not included in NPLs)	$	9,204	$	12,081
Non performing TDRs (these are included in NPLs)		1,284		698
Total TDRs		10,488		12,779
Impaired loans that are not TDRs		6,680		7,566
Total impaired loans	$	17,168	$	20,345

Bank premises and equipment

Bank premises and equipment was $224,506 at September 30, 2018 compared to $141,886 at December 31, 2017, an increase of $82,620 or 58.2%.  The primary component of the increase is $96,678 of branch real estate acquired pursuant to the acquisitions of Sunshine, Harbor and Charter.  In addition, we transferred $28,003 of branch real estate, including branch real estate acquired from Sunshine, Harbor and Charter, that is no longer in use to held for sale at estimated fair value less estimated cost to sell.  

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A summary of our bank premises and equipment for the period end indicated is presented in the table below.

	Sep. 30, 2018		Dec. 31, 2017
Land	$	73,287	$	51,724
Land improvements		1,326		1,251
Buildings		129,799		85,625
Leasehold improvements		13,348		6,575
Furniture, fixtures and equipment		46,765		38,662
Construction in progress		13,061		4,783
Subtotal		277,586		188,620
Less: accumulated depreciation		53,080		46,734
Total	$	224,506	$	141,886

We transferred branch real estate that is no longer in use to held for sale at estimated fair value less estimated cost to sell and sold 15 properties during the nine month ending September 30, 2018.   Our branch real estate held for sale at September 30, 2018 and December 31, 2017 was $27,081 and $11,354, respectively, a net increase of $15,727.  The net increase is due to transfers of bank properties to held for sale of $27,799, after impairment expense of $1,120, the sale of 15 properties and additional impairment expense of $2,587 on bank properties previously transferred to held for sale.  We received net proceeds of $12,350 for the properties sold during the nine month period ending September 30, 2018.

Interest Rate Swap Derivatives

The Company enters into interest rate swaps in order to provide commercial loan clients the ability to swap from fixed to variable interest rates. Under these agreements, the Company enters into a fixed-rate loan with a client in addition to a swap agreement. This swap agreement effectively converts the client’s fixed rate loan into a variable rate. The Company then enters into a matching swap agreement with a third party dealer in order to offset its exposure on the customer swap. The fair value of interest rate swap derivatives (asset component) was $87,946 at September 30, 2018 compared to $42,480 at December 31, 2017.  The fair value of interest rate swap derivatives (liability component) was $88,065 at September 30, 2018 compared to $43,259 at December 31, 2017.  

Deposits

Total deposits were $9,474,526 at September 30, 2018 compared to $5,560,523 at December 31, 2017.  We assumed approximately $3,796,164 in deposits from the Sunshine, Harbor and Charter transactions which were completed in 2018 and sold $25,341 of deposits during the third quarter of 2018.  Excluding the deposits assumed from these three transactions and deposits sold, total deposits increased $143,180, or approximately 2% on an annualized basis, mainly in time deposits.  The cost of interest bearing deposits in the current quarter was 0.64%, compared to 0.51% in the previous quarter. The overall cost of total deposits (i.e. includes non-interest bearing checking accounts) in the current quarter was 0.42% compared to 0.33% in the previous quarter.  The table below summarizes the Company’s deposit mix for the periods presented.

			% of					% of
	Sep. 30, 2018		total			Dec. 31, 2017		total
Demand - non-interest bearing	$	3,094,652		33	%	$	1,999,901		36	%
Demand - interest bearing		1,702,467		18	%		1,058,985		19	%
Money market accounts		2,103,884		21	%		900,532		16	%
Savings deposits		711,235		8	%		768,422		14	%
Time deposits		1,862,288		20	%		832,683		15	%
Total deposits	$	9,474,526		100	%	$	5,560,523		100	%

.

Securities sold under agreement to repurchase

Our Bank enters into borrowing arrangements with our retail business customers by agreements to repurchase (“securities sold under agreements to repurchase”) under which the Bank pledges investment securities owned and under their control as collateral against these one-day borrowing arrangement. These short-term borrowings totaled $51,311 at September 30, 2018 compared to $52,080 at December 31, 2017.  

Federal funds purchased

Federal funds purchased are overnight deposits from correspondent banks. Federal funds purchased acquired from other than our correspondent bank deposits are included with Federal Home Loan Bank advances and other borrowed funds as described below, if any. At September 30, 2018 we had $272,002 of correspondent bank deposits or federal funds purchased, compared to $261,490 at December 31, 2017.

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Federal Home Loan Bank advances and other borrowed funds

From time to time, we borrow either through Federal Home Loan Bank advances or Federal Funds Purchased, other than correspondent bank deposits (i.e. federal funds purchased) listed above. We had $360,000 in Federal Home Loan Bank advances and $11,000 in subordinated notes (assumed from the Sunshine transaction closed on January 1, 2018) at September 30, 2018.  We had $155,000 in Federal Home Loan Bank advances, $70,000 in overnight borrowings (which are included in federal funds on the Condensed Consolidated Balance Sheet), and $20,000 in a revolving line of credit at December 31, 2017.

Corporate debentures

Below is a schedule of statutory trust entities and the related corporate debentures formed and assumed through various acquisitions.  We assumed $8,000 in corporate debentures pursuant to the acquisition of Harbor on January 1, 2018 and $9,000 in corporate debentures pursuant to the acquisition of Charter on September 1, 2018.

	Amount	Interest Rate	Maturity
CenterState Banks of Florida Statutory Trust I	$10,000	LIBOR + 3.05%	Sep. 2033
Valrico Capital Statutory Trust	$2,500	LIBOR + 2.70%	Sep. 2034
Federal Trust Statutory Trust I	$5,000	LIBOR + 2.95%	Sep. 2033
Gulfstream Bancshares Capital Trust II	$3,000	LIBOR + 1.70%	Mar. 2037
Homestead Statutory Trust I	$10,000	LIBOR + 1.65%	Oct. 2036
BSA Financial Statutory Trust I	$5,000	LIBOR + 1.55%	Dec. 2035
MRCB Statutory Trust II	$3,000	LIBOR + 1.60%	Sep. 2036
CBS Financial Capital Trust I	$4,000	Prime + 0.25%	Mar. 2035
CBS Financial Capital Trust II	$5,000	LIBOR + 2.75%	Dec. 2037

Stockholders’ equity

Stockholders’ equity at September 30, 2018, was $1,913,159, or 15.6% of total assets, compared to $904,750, or 12.7% of total assets at December 31, 2017. The increase in stockholders’ equity was due to the following items:

Total stockholders' equity at December 31, 2017	$	904,750
Net income during the period		105,784
Dividends paid on common shares ($0.30 per share)		(26,337	)
Net decrease in market value of securities available for sale, net of deferred taxes		(30,883	)
Stock options exercised		14,252
Equity based compensation		3,662
Stock repurchase (38,496 shares, average price of $26.68 per share)		(1,027	)
Stock issued pursuant to acquisition of Sunshine		181,413
Stock options acquired and converted pursuant to Sunshine acquisition		6,432
Stock issued pursuant to acquisition of HCBF		387,279
Stock options acquired and converted pursuant to HCBF acquisition		18,025
Stock issued pursuant to acquisition of Charter		349,809
Total stockholders' equity at September 30, 2018	$	1,913,159

The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Company on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. Under these rules, banks are required to maintain a minimum CET1 ratio of 4.5%, a minimum Tier 1 capital to risk-weighted assets of 6%, a total risk-based capital ratio of 8%, and a minimum leverage capital ratio of 4%. In addition, the rules require a capital conservation buffer of up to 2.5% above each of CET1, tier 1, and total risk-based capital which must be met for a bank to be able to pay dividends, engage in share buybacks or make discretionary bonus payments to executive management without restriction. This capital conservation buffer

is being phased in over a four year period starting on January 1, 2016 and was 1.25% in 2017 and 1.875% as of January 1, 2018. When fully implemented, a banking organization would need to maintain a CET1 capital ratio of at least 7%, a total Tier 1 capital ratio of at least 8.5% and a total risk-based capital ratio of at least 10.5%.  The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital.

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Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) of total capital, Tier I capital and CET1 (as defined in the regulations) to risk-weighted assets. Management believes, as of September 30, 2018, that the Company and the Bank meet all capital adequacy requirements to which they are subject.

Selected consolidated capital ratios at September 30, 2018 and December 31, 2017 for the Company and the Bank are presented in the tables below.  The ratios for capital adequacy purposes do not include capital conservation buffer requirements.

CenterState Bank Corporation (the Company)	Actual					Capital Adequacy			Excess
	Amount		Ratio			Amount		Ratio	Amount
September 30, 2018
Total capital (to risk weighted assets)	$	1,144,657		12.5	%	$	734,865	>8.0%	$	409,792
Tier 1 capital (to risk weighted assets)		1,105,846		12.0	%		551,149	>6.0%		554,697
Common equity Tier 1 capital (to risk weighted assets)		1,058,346		11.5	%		413,362	>4.5%		644,984
Tier 1 capital (to average assets)		1,105,846		11.0	%		403,381	>4.0%		702,465
December 31, 2017
Total capital (to risk weighted assets)	$	682,175		12.6	%	$	434,245	>8.0%	$	247,930
Tier 1 capital (to risk weighted assets)		649,350		12.0	%		325,684	>6.0%		323,666
Common equity Tier 1 capital (to risk weighted assets)		621,956		11.5	%		244,263	>4.5%		377,693
Tier 1 capital (to average assets)		649,350		9.8	%		264,616	>4.0%		384,734
CenterState Bank, N.A.	Actual					Well Capitalized			Excess
	Amount		Ratio			Amount		Ratio	Amount
September 30, 2018
Total capital (to risk weighted assets)	$	1,137,875		12.4	%	$	919,141	>10.0%	$	218,734
Tier 1 capital (to risk weighted assets)		1,099,070		12.0	%		735,313	>8.0%		363,757
Common equity Tier 1 capital (to risk weighted assets)		1,099,070		12.0	%		597,442	>6.5%		501,628
Tier 1 capital (to average assets)		1,099,070		10.9	%		503,716	>5.0%		595,354
December 31, 2017
Total capital (to risk weighted assets)	$	654,018		12.2	%	$	538,202	>10.0%	$	115,816
Tier 1 capital (to risk weighted assets)		621,199		11.5	%		430,561	>8.0%		190,638
Common equity Tier 1 capital (to risk weighted assets)		621,199		11.5	%		349,831	>6.5%		271,368
Tier 1 capital (to average assets)		621,199		9.4	%		330,721	>5.0%		290,478

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COMPARISON OF RESULTS OF OPERATIONS FOR THE THREE MONTH PERIODS ENDED SEPTEMBER 30, 2018 AND 2017

Overview

We recognized net income of $37,985 or $0.43 per share basic and diluted for the three month period ended September 30, 2018, compared to net income of $22,050 or $0.37 per share basic and $0.36 per share diluted for the same period in 2017.  A summary of the differences are listed in the table below.

	Sep. 30,		Sep. 30,		increase
Three month period ending	2018		2017		(decrease)
Net interest income	$	101,853	$	62,586	$	39,267
Provision for loan losses		1,950		1,096		854
Net interest income after loan loss provision		99,903		61,490		38,413
Total non interest income		27,104		16,741		10,363
Merger related expenses		10,395		—		10,395
All other non interest expense		66,944		44,622		22,322
Total non interest expense		77,339		44,622		32,717
Net income before provision for income taxes		49,668		33,609		16,059
Provision for income taxes		11,683		11,559		124
Net income (loss)	$	37,985	$	22,050	$	15,935

The primary differences between the two quarters presented above relate to the acquisitions of Sunshine, Harbor and Charter, which were completed in 2018.   The increase in our net interest income relates primarily to the increase in our average interest earning assets as a result of loan growth and the acquisitions of Sunshine, Harbor and Charter.  The increase in our “all other non interest expense,” which represents the operating expenses of our commercial/retail banking segment, is primarily due to the acquisition of Sunshine, Harbor and Charter.  These items along with others are discussed and analyzed below.

Our strategy is to grow organically and by acquisition in the southeastern region.  In pursuing this strategy, we seek lending teams and companies that are culturally similar to us, that are experienced and are located in our markets or in markets close to us so we can achieve economies of scale.  During 2016, we established a new mortgage line of business led by an experienced mortgage lending team, and an SBA business and intend to grow those business lines in our markets, thus increasing our non-interest income.  In September 2018, we hired a team of mortgage professionals from State Bank and acquired State Bank’s mortgage loan pipeline. Mortgage banking revenue and SBA revenue increased $2,784 and $771, respectively, during the current quarter compared to the same period in 2017.

Net interest income/margin

Net interest income increased $39,267 or 62.7% to $101,853 during the three month period ended September 30, 2018 compared to $62,586 for the same period in 2017. The $39,267 increase was the result of a $47,606 increase in interest income and a $8,339 increase in interest expense.

Interest earning assets averaged $9,438,654 during the three month period ended September 30, 2018 as compared to $5,964,076 for the same period in 2017, an increase of $3,474,578, or 58.3%. The yield on average interest earning assets increased 36 bps to 4.82% (29 bps to 4.85% tax equivalent basis) during the three month period ended September 30, 2018, compared to 4.46% (4.56% tax equivalent basis) for the same period in 2017. The combined effects of the $3,474,578 increase in average interest earning assets and the 36 bps (29 bps tax equivalent basis) increase in yield on average interest earning assets resulted in the $47,606 ($46,753 tax equivalent basis) increase in interest income between the two periods.

Interest bearing liabilities averaged $6,235,669 during the three month period ended September 30, 2018 as compared to $3,852,600 for the same period in 2017, an increase of $2,383,069 or 61.9%. The cost of average interest bearing liabilities was 0.82% during the three month period ended September 30, 2018, compared to 0.46% for the same period in 2017. The effect of the $2,383,069 increase in average interest bearing liabilities and the 36 bps increase in cost of funds resulted in the $8,339 increase in interest expense between the two periods.

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The table below summarizes the analysis of changes in interest income and interest expense for the three month periods ended September 30, 2018 and 2017 on a tax equivalent basis.

	Three months ended September 30,
	2018								2017
	Average			Interest		Average			Average			Interest		Average
	Balance			inc / exp		rate			balance			inc / exp		rate
Loans (notes 1, 2, 8)	$	7,296,200		$	94,257		5.13	%	$	4,492,543		$	52,254		4.61	%
PCI loans (note 9)		167,640			7,682		18.18	%		170,924			7,696		17.86	%
Securities- taxable		1,540,686			10,145		2.61	%		926,367			5,648		2.42	%
Securities- tax exempt (note 8)		208,663			1,874		3.56	%		196,988			2,082		4.19	%
Fed funds sold and other (note 3)		225,465			1,362		2.40	%		177,254		887			1.99	%
Total interest earning assets		9,438,654			115,320		4.85	%		5,964,076			68,567		4.56	%
Allowance for loan losses		(37,406	)							(30,775	)
All other assets		1,544,725								826,918
Total assets	$	10,945,973							$	6,760,219
Interest bearing deposits (note 4)		5,611,103			9,096		0.64	%		3,507,381			3,178		0.36	%
Fed funds purchased		229,948			1,192		2.06	%		257,967		819			1.26	%
Other borrowings (note 5)		359,370			1,943		2.15	%		61,149		127			0.82	%
Corporate debenture (note 10)		35,248			579		6.52	%		26,103		347			5.27	%
Total interest bearing liabilities		6,235,669			12,810		0.82	%		3,852,600			4,471		0.46	%
Demand deposits		2,900,679								1,926,070
Other liabilities		135,852								81,057
Stockholders’ equity		1,673,773								900,492
Total liabilities and stockholders’ equity	$	10,945,973							$	6,760,219
Net interest spread (tax equivalent basis) (note 6)							4.03	%							4.10	%
Net interest income (tax equivalent basis)				$	102,510							$	64,096
Net interest margin (tax equivalent basis) (note 7)							4.31	%							4.26	%

note 1: Loan balances are net of deferred origination fees and costs.

note 2: Interest income on average loans includes amortization of loan fee recognition of $872 and $317 for the three month periods ended September 30, 2018 and 2017.

note 3: Includes federal funds sold, interest earned on deposits at the Federal Reserve Bank and earnings on Federal Reserve Bank stock and Federal Home Loan Bank stock.

note 4: Includes interest bearing deposits only. Non-interest bearing checking accounts are included in the demand deposits listed above. Also, includes net amortization of fair market value adjustments related to various acquisitions of time deposits of ($341) and ($456) for the three month periods ended September 30, 2018 and 2017.

note 5: Includes securities sold under agreements to repurchase and Federal Home Loan Bank advances.

note 6: Represents the average rate earned on interest earning assets minus the average rate paid on interest bearing liabilities (Non-GAAP).

note 7: Represents net interest income divided by total interest earning assets (Non-GAAP).

note 8: Interest income and rates include the effects of a tax equivalent adjustment using applicable statutory tax rates to adjust tax exempt interest income on tax exempt investment securities and loans to a fully taxable basis (Non-GAAP).

note 9: PCI loans are accounted for pursuant to ASC 310-30.

note 10: Includes amortization of fair value adjustments related to various acquisitions of corporate debentures of $87 and $58 for the three month periods ended September 30, 2018 and 2017.

The primary reason for the increase in our net interest margin (“NIM”) during the current period was due to higher loan yields offset by an increase to the cost of deposits between the two periods presented above.   The increase in loan yields is due to the impact of loans acquired from Sunshine, Harbor and Charter and an increase on loan yields.

Provision for loan losses

The provision for loan losses increased $854 to $1,950 during the three month period ending September 30, 2018 compared to a provision expense of $1,096 for the comparable period in 2017. Our policy is to maintain the allowance for loan losses at a level sufficient to absorb probable incurred losses in the loan portfolio. The allowance is increased by the provision for loan losses, which is a charge to current period earnings, and is decreased by charge-offs, net of recoveries on prior loan charge-offs. Therefore, the provision for loan losses (Income Statement effect) is a residual of management’s determination of allowance for loan losses (Balance Sheet approach). In determining the adequacy of the allowance for loan losses, we consider the conditions of individual borrowers, the historical loan loss experience, the general economic environment, the overall portfolio composition, and other information. As these

65

factors change, the level of loan loss provision changes.  The increase in our loan loss provision between the comparable periods is a result of an increase in non-impaired loan balances. See “Credit quality and allowance for loan losses” for additional information regarding the allowance for loan losses.

Non-interest income

Non-interest income for the three months ended September 30, 2018 was $27,104 compared to $16,741 for the comparable period in 2017. A summary of the differences are listed in the table below.

	Sep. 30,		Sep. 30,		$ increase			% increase
Three month period ending:	2018		2017		(decrease)			(decrease)
Income from correspondent banking capital markets division (note 1)	$	7,258	$	5,823	$	1,435			24.6		%
Other correspondent banking related revenue (note 2)		1,038		1,390		(352	)		(25.3	)	%
Mortgage banking revenue		3,188		404		2,784			689.1		%
SBA revenue		1,020		249		771			309.6		%
Service charges on deposit accounts		5,787		3,870		1,917			49.5		%
Debit, prepaid, ATM and merchant card related fees		3,869		2,127		1,742			81.9		%
BOLI income		1,490		975		515			52.8		%
Wealth management related revenue		676		914		(238	)		(26.0	)	%
Gain on sale of bank properties held for sale		655		175		480		NM			%
Other non-interest income		2,123		814		1,309			160.8		%
Total non-interest income	$	27,104	$	16,741	$	10,363			61.9		%

note 1: Includes gross commissions earned on bond sales, fees from hedging services, loan brokering fees and related consulting fees.  The fee income in this category is based on sales volume in any particular period and is therefore volatile between comparable periods.      

note 2: Includes fees from safe-keeping activities, bond accounting services, asset/liability consulting services, international wires, clearing and corporate checking account services and other correspondent banking related revenue and fees.  The fees included in this category are less volatile than those described above in note 1.  

Mortgage banking revenue and SBA revenue increased $2,784 and $771, respectively, during the current quarter compared to the same period in 2017.  Other increases in non-interest income between the periods presented are mainly attributable to the acquisitions of Sunshine, Harbor and Charter, which were completed in 2018. Income from correspondent banking capital markets division increased between the two periods presented above due to higher interest rate swap revenue.  

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Non-interest expense

Non-interest expense for the three months ended September 30, 2018 increased $32,717, or 73.3%, to $77,339, compared to $44,622 for the same period in 2017. Components of our non-interest expenses are listed in the table below.

	Sep. 30,			Sep. 30,			$ increase			% increase
Three month period ending:	2018			2017			(decrease)			(decrease)
Salaries and wages	$	33,274		$	21,655		$	11,619			53.7		%
Incentive/bonus compensation		1,140			2,918			(1,778	)		(60.9	)	%
Stock based compensation		1,012			1,079			(67	)		(6.2	)	%
Employer 401K matching contributions		857			581			276			47.5		%
Deferred compensation expense		180			136			44			32		%
Health insurance and other employee benefits		3,491			1,668			1,823			109.3		%
Payroll taxes		2,075			1,325			750			56.6		%
Other employee related expenses		2,783			456			2,327			510.3		%
Incremental direct cost of loan origination		(3,114	)		(1,303	)		(1,811	)		139.0		%
Total salaries, wages and employee benefits		41,698			28,515			13,183			46.2		%
Gain on sale of OREO		(294	)		(38	)		(256	)		673.7		%
Valuation write down of OREO		170			141			29			20.6		%
(Gain) loss on repossessed assets other than real estate		(9	)		(13	)		4			(30.8	)	%
Foreclosure and repossession related expenses		821			437			384			87.9		%
Total credit related expenses		688			527			161			30.6		%
Occupancy expense		5,428			3,422			2,006			58.6		%
Depreciation of premises and equipment		2,439			1,842			597			32.4		%
Supplies, stationary and printing		588			392			196			50.0		%
Marketing expenses		1,493			955			538			56.3		%
Data processing expense		2,729			2,006			723			36.0		%
Legal, auditing and other professional fees		1,301			854			447			52.3		%
Bank regulatory related expenses		1,367			666			701			105.3		%
Postage and delivery		711			512			199			38.9		%
Debit, prepaid, ATM and merchant card related expenses		972			746			226			30.3		%
Amortization of intangibles		2,480			1,133			1,347			118.9		%
Internet and telephone banking		768			538			230			42.8		%
Operational write-offs and losses		509			263			246			93.5		%
Correspondent accounts and Federal Reserve charges		265			216			49			22.7		%
Conferences/Seminars/Education/Training		425			164			261			159.1		%
Director fees		366			223			143			64.1		%
Impairment of bank property held for sale		247			—			247			NM		%
Travel expenses		248			169			79			46.7		%
Other expenses		2,222			1,479			743			50.2		%
Subtotal		66,944			44,622			22,322			50.0		%
Merger related expenses		10,395			—			10,395			NM		%
Total non-interest expense	$	77,339		$	44,622		$	32,717			73.3		%

The overall primary reason for the increase between the periods presented above relates to the acquisitions of Sunshine, Harbor and Charter, which were completed in 2018.  

Provision for income taxes

We recognized an income tax expense for the three months ended September 30, 2018 of $11,683 on pre-tax income of $49,668 (an effective tax rate of 23.5%) compared to an income tax expense of $11,559 on pre-tax income of $33,609 (an effective tax rate of 34.4%) for the comparable quarter in 2017.  The decrease in the effective tax rate is due to the lower corporate tax rate effective January 1, 2018 pursuant to the Tax Cuts and Jobs Act of 2017.  In addition, we recognized $177 in excess tax benefits on stock awards during the three months ended September 30, 2018 compared to $205 for the same period in 2017.

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COMPARISON OF RESULTS OF OPERATIONS FOR THE NINE MONTH PERIODS ENDED SEPTEMBER 30, 2018 AND 2017

Overview

We recognized net income of $105,784 or $1.24 per share basic and $1.23 per share diluted for the nine month period ended September 30, 2018, compared to net income of $53,883 or $0.95 per share basic and $0.94 per share diluted for the same period in 2017.  A summary of the differences are listed in the table below.

	Sep. 30,		Sep. 30,		increase
Nine month period ending:	2018		2017		(decrease)
Net interest income	$	297,400	$	171,924	$	125,476
Provision for loan losses		6,183		3,990		2,193
Net interest income after loan loss provision		291,217		167,934		123,283
Total non-interest income		72,731		48,217		24,514
Merger related expenses		33,244		10,328		22,916
All other non-interest expense		199,703		127,146		72,557
Total non-interest expense		232,947		137,474		95,473
Net income before provision for income taxes		131,001		78,677		52,324
Provision for income taxes		25,217		24,794		423
Net income	$	105,784	$	53,883		51,901

The primary differences between the two periods presented above relate to the acquisitions of Platinum and Gateway, which were completed during the second quarter of 2017, and the acquisitions of Sunshine, Harbor and Charter, which were completed in 2018.   The increase in our net interest income relates primarily to the increase in our average interest earning assets as a result of loan growth and the acquisitions of Platinum, Gateway, Sunshine, Harbor and Charter.  The increase in our “all other non interest expense,” which represents the operating expenses of our commercial/retail banking segment, is primarily due to the acquisition of Platinum, Gateway, Sunshine, Harbor and Charter.  These items along with others are discussed and analyzed below.

Our strategy is to grow organically and by acquisition in the southeastern region.  In pursuing this strategy, we seek lending teams and companies that are culturally similar to us, that are experienced and are located in our markets or in markets close to us so we can achieve economies of scale.  During 2016, we established a new mortgage line of business led by an experienced mortgage lending team, and an SBA business and intend to grow those business lines in our markets, thus increasing our non-interest income. In September 2018, we hired a team of mortgage professionals from State Bank and acquired State Bank’s mortgage loan pipeline.   Mortgage banking revenue and SBA revenue increased $7,474 and $2,593, respectively, during the current period compared to the same period in 2017.

Net interest income/margin

Net interest income increased $125,476 or 73.0% to $297,400 during the nine month period ended September 30, 2018 compared to $171,924 for the same period in 2017. The $125,476 increase was the result of a $145,547 increase in interest income and a $20,071 increase in interest expense.

Interest earning assets averaged $9,103,254 during the nine month period ended September 30, 2018 as compared to $5,470,846 for the same period in 2017, an increase of $3,632,408, or 66.4%. The yield on average interest earning assets increased 35 bps to 4.82% (28 bps to 4.85% tax equivalent basis) during the nine month period ended September 30, 2018, compared to 4.47% (4.57% tax equivalent basis) for the same period in 2017. The combined effects of the $3,632,408 increase in average interest earning assets and the 35 bps (28 bps tax equivalent basis) increase in yield on average interest earning assets resulted in the $145,547 ($143,104 tax equivalent basis) increase in interest income between the two periods.

Interest bearing liabilities averaged $5,974,015 during the nine month period ended September 30, 2018 as compared to $3,515,891 for the same period in 2017, an increase of $2,458,124 or 69.9%. The cost of average interest bearing liabilities was 0.69% during the nine month period ended September 30, 2018, compared to 0.42% for the same period in 2017. The effect of the $2,458,124 increase in average interest bearing liabilities and the 27 bps increase in cost of funds resulted in the $20,071 increase in interest expense between the two periods.

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The table below summarizes the analysis of changes in interest income and interest expense for the six month periods ended September 30, 2018 and 2017 on a tax equivalent basis.

	Nine months ended September 30,
	2018								2017
	Average			Interest		Average			Average			Interest		Average
	Balance			inc / exp		rate			balance			inc / exp		rate
Loans (notes 1, 2, 8)	$	6,915,341		$	263,627		5.10	%	$	4,014,055		$	137,546		4.58	%
PCI loans (note 9)		181,209			26,496		19.55	%		178,171			24,780		18.59	%
Securities- taxable		1,551,760			30,888		2.66	%		914,029			16,622		2.43	%
Securities- tax exempt (note 8)		208,872			5,518		3.53	%		177,476			5,821		4.39	%
Fed funds sold and other (note 3)		246,072			3,718		2.02	%		187,115		2374			1.70	%
Total interest earning assets		9,103,254			330,247		4.85	%		5,470,846			187,143		4.57	%
Allowance for loan losses		(34,989	)							(28,689	)
All other assets		1,448,433								707,873
Total assets	$	10,516,698							$	6,150,030
Interest bearing deposits (note 4)		5,347,950			20,900		0.52	%		3,181,814			7,694		0.32	%
Fed funds purchased		255,488			3,563		1.86	%		257,210			2,048		1.06	%
Other borrowings (note 5)		337,461			5,022		1.99	%		50,822			240		0.63	%
Corporate debenture (note 10)		33,116			1,566		6.32	%		26,045			998		5.12	%
Total interest bearing liabilities		5,974,015			31,051		0.69	%		3,515,891			10,980		0.42	%
Demand deposits		2,859,963								1,776,896
Other liabilities		111,682								70,597
Stockholders’ equity		1,571,039								786,646
Total liabilities and stockholders’ equity	$	10,516,699							$	6,150,030
Net interest spread (tax equivalent basis) (note 6)							4.16	%							4.15	%
Net interest income (tax equivalent basis)				$	299,196							$	176,163
Net interest margin (tax equivalent basis) (note 7)							4.39	%							4.31	%

note 1: Loan balances are net of deferred origination fees and costs.

note 2: Interest income on average loans includes amortization of loan fee recognition of $1,987 and $1,166 for the six month periods ended September 30, 2018 and 2017.

note 3: Includes federal funds sold, interest earned on deposits at the Federal Reserve Bank and earnings on Federal Reserve Bank stock and Federal Home Loan Bank stock.

note 4: Includes interest bearing deposits only. Non-interest bearing checking accounts are included in the demand deposits listed above. Also, includes net amortization of fair market value adjustments related to various acquisitions of time deposits of ($1,333) and ($1,072) for the six month periods ended September 30, 2018 and 2017.

note 5: Includes securities sold under agreements to repurchase and Federal Home Loan Bank advances.

note 6: Represents the average rate earned on interest earning assets minus the average rate paid on interest bearing liabilities (Non-GAAP).

note 7: Represents net interest income divided by total interest earning assets (Non-GAAP).

note 8: Interest income and rates include the effects of a tax equivalent adjustment using applicable statutory tax rates to adjust tax exempt interest income on tax exempt investment securities and loans to a fully taxable basis (Non-GAAP).

note 9: PCI loans are accounted for pursuant to ASC 310-30.

note 10: Includes amortization of fair value adjustments related to various acquisitions of corporate debentures of $263 and $176 for the six month periods ended September 30, 2018 and 2017.

The primary reason for the increase in our net interest margin (“NIM”) during the current period was due to higher loan yields offset by an increase to the cost of deposits between the two periods presented above.   The increase in loan yields is due to the impact of loans acquired from Platinum, Gateway, Sunshine, Harbor and Charter, $4.0 million of income recognized due to prepayments on one PCI loan relationship and an increase on loan yields.

Provision for loan losses

The provision for loan losses increased $2,193 to $6,183 during the nine month period ending September 30, 2018 compared to a provision expense of $3,990 for the comparable period in 2017. Our policy is to maintain the allowance for loan losses at a level sufficient to absorb probable incurred losses in the loan portfolio. The allowance is increased by the provision for loan losses, which is a charge to current period earnings, and is decreased by charge-offs, net of recoveries on prior loan charge-offs. Therefore, the provision for loan losses (Income Statement effect) is a residual of management’s determination of allowance for loan losses (Balance Sheet approach). In determining the adequacy of the allowance for loan losses, we consider the conditions of individual borrowers, the

69

historical loan loss experience, the general economic environment, the overall portfolio composition, and other information. As these factors change, the level of loan loss provision changes.  The increase in our loan loss provision between the comparable periods is a result of an increase in non-impaired loan balances. See “Credit quality and allowance for loan losses” for additional information regarding the allowance for loan losses.

Non-interest income

Non-interest income for the nine month period ended September 30, 2018 was $72,731 compared to $48,217 for the comparable period in 2017. A summary of the differences are listed in the table below.

	Sep. 30,			Sep. 30,		$ increase			% increase
Nine month period ending:	2018			2017		(decrease)			(decrease)
Income from correspondent banking capital markets division (note 1)	$	20,156		$	18,067	$	2,089			11.6		%
Other correspondent banking related revenue (note 2)		3,339			3,658		(319	)		(8.7	)	%
Mortgage banking revenue		8,406			932		7,474			801.9		%
SBA revenue		3,035			442		2,593			586.7		%
Service charges on deposit accounts		15,482			11,267		4,215			37.4		%
Debit, prepaid, ATM and merchant card related fees		11,094			6,716		4,378			65.2		%
BOLI income		4,258			2,310		1,948			84.3		%
Wealth management related revenue		1,932			2,698		(766	)		(28.4	)	%
Gain on sale of bank properties held for sale		1,745			304		1,441			474.0		%
Other non-interest income		3,306			1,823		1,483			81.3		%
Gain on sale of securities		(22	)		—		(22	)	NM			%
Total non-interest income	$	72,731		$	48,217	$	24,514			50.8		%

note 1: Includes gross commissions earned on bond sales, fees from hedging services, loan brokering fees and related consulting fees.  The fee income in this category is based on sales volume in any particular period and is therefore volatile between comparable periods.      

note 2: Includes fees from safe-keeping activities, bond accounting services, asset/liability consulting services, international wires, clearing and corporate checking account services and other correspondent banking related revenue and fees.  The fees included in this category are less volatile than those described above in note 1.  

Income from correspondent banking capital markets division increased between the two periods presented above due to increased fees from bond and capital market sales.  Mortgage banking revenue and SBA revenue increased $7,474 and $2,593, respectively, during the current period compared to the same period in 2017.  Other increases in non-interest income between the periods presented are mainly attributable to the acquisitions of Platinum and Gateway, which closed during the second quarter of 2017, and Sunshine, Harbor and Charter, which were completed in 2018.

70

Non-interest expense

Non-interest expense for the nine months ended September 30, 2018 increased $95,473, or 69.4%, to $232,947, compared to $137,474 for the same period in 2017. Components of our non-interest expenses are listed in the table below.

	Sep. 30,			Sep. 30,			$ increase			% increase
Nine month period ending:	2018			2017			(decrease)			(decrease)
Salaries and wages	$	95,499		$	60,250		$	35,249			58.5		%
Incentive/bonus compensation		8,286			6,961			1,325			19.0		%
Stock based compensation		3,012			3,333			(321	)		(9.6	)	%
Employer 401K matching contributions		2,495			1,691			804			47.5		%
Deferred compensation expense		446			427			19			4.4		%
Health insurance and other employee benefits		9,871			5,055			4,816			95.3		%
Payroll taxes		6,935			4,197			2,738			65.2		%
Other employee related expenses		4,366			1,305			3,061			234.6		%
Incremental direct cost of loan origination		(6,636	)		(3,505	)		(3,131	)		89.3		%
Total salaries, wages and employee benefits		124,274			79,714			44,560			55.9		%
Gain on sale of OREO		(1,193	)		(200	)		(993	)		496.5		%
Valuation write down of OREO		464			612			(148	)		(24.2	)	%
Loss (gain) on repossessed assets other than real estate		10			(19	)		29			(152.6	)	%
Foreclosure and repossession related expenses		2,056			1,665			391			23.5		%
Total credit related expenses		1,337			2,058			(721	)		(35.0	)	%
Occupancy expense		15,264			9,453			5,811			61.5		%
Depreciation of premises and equipment		7,036			5,363			1,673			31.2		%
Supplies, stationary and printing		1,682			1,180			502			42.5		%
Marketing expenses		4,332			2,885			1,447			50.2		%
Data processing expense		10,687			6,251			4,436			71.0		%
Legal, auditing and other professional fees		3,564			2,674			890			33.3		%
Bank regulatory related expenses		3,586			2,284			1,302			57.0		%
Postage and delivery		2,145			1,431			714			49.9		%
Debit, prepaid, ATM and merchant card related expenses		2,596			2,102			494			23.5		%
Amortization of intangibles		7,029			2,937			4,092			139.3		%
Internet and telephone banking		2,376			1,559			817			52.4		%
Operational write-offs and losses		1,365			433			932			215.2		%
Correspondent accounts and Federal Reserve charges		787			646			141			21.8		%
Conferences/Seminars/Education/Training		912			603			309			51.2		%
Impairment of bank property held for sale		2,587			507			2,080			410.3		%
Director fees		882			576			306			53.1		%
Travel expenses		674			516			158			30.6		%
Other expenses		6,588			3,974			2,614			65.8		%
Subtotal		199,703			127,146			72,557			57.1		%
Merger related expenses		33,244			10,328			22,916			221.9		%
Total non-interest expense	$	232,947		$	137,474		$	95,473			69.4		%

The overall primary reason for the increase between the periods presented above relates to the acquisitions of Platinum and Gateway, which were completed during the second quarter of 2017, and Sunshine, Harbor and Charter, which were completed in 2018.  

Provision for income taxes

We recognized an income tax expense for the nine months ended September 30, 2018 of $25,217 on pre-tax income of $131,001 (an effective tax rate of 19.2%) compared to an income tax expense of $24,794 on pre-tax income of $78,677 (an effective tax rate of 31.5%) for the comparable quarter in 2017.  The decrease in the effective tax rate is due to the lower corporate tax rate effective January 1, 2018 pursuant to the Tax Cuts and Jobs Act of 2017.  In addition, we recognized $6,018 in excess tax benefits on stock awards during the nine months ended September 30, 2018 compared to $2,407 for the same period in 2017.

71

Liquidity

Liquidity is defined as the ability to meet anticipated customer demands for funds under credit commitments and deposit withdrawals at a reasonable cost and on a timely basis. We measure liquidity position by giving consideration to both on- and off-balance sheet sources of and demands for funds on a daily and weekly basis.

Our Bank regularly assesses the amount and likelihood of projected funding requirements through a review of factors such as historical deposit volatility and funding patterns, present and forecasted market and economic conditions, individual client funding needs, and existing and planned business activities. The Bank’s asset/liability committee (ALCO) provides oversight to the liquidity management process and recommends guidelines, subject to the approval of its board of directors, and courses of action to address actual and projected liquidity needs.

Short term sources of funding and liquidity include cash and cash equivalents, net of federal requirements to maintain reserves against deposit liabilities; investment securities eligible for pledging to secure borrowings from customers pursuant to securities sold under repurchase agreements; loan repayments; deposits and certain interest rate-sensitive deposits; and borrowings under overnight federal fund lines available from correspondent banks. In addition to interest rate-sensitive deposits, the primary demand for liquidity is anticipated fundings under credit commitments to customers.

Off-Balance Sheet Arrangements

We do not have any material off-balance sheet arrangements except for approved and unfunded loans and letters of credit to our customers in the ordinary course of business.

72

Use of Non-GAAP Financial Measures and Ratios

The accounting and reporting policies of the Company conform to generally accepted accounting principles (“GAAP”) in the United States and prevailing practices in the banking industry. However, certain non-GAAP performance measures and ratios are used by management to evaluate and measure the Company’s performance. These include tax-equivalent net interest income (including its individual components) and net interest margin (including its individual components). Management believes that these measures and ratios provide users of the Company’s financial information with a more meaningful view of the performance of the interest-earning assets and interest-bearing liabilities.  Other financial holding companies may define or calculate these measures differently.  

Management reviews yields on certain asset categories and the net interest margin of the Company and its banking subsidiaries on a fully taxable equivalent basis. In this non-GAAP presentation, net interest income is adjusted to reflect tax-exempt interest income on an equivalent before-tax basis. This measure ensures the comparability of net interest income arising from both taxable and tax-exempt sources.

These disclosures should not be considered in isolation or a substitute for results determined in accordance with GAAP, and are not necessarily comparable to non-GAAP performance measures which may be presented by other financial holding companies. Management compensates for these limitations by providing detailed reconciliations between GAAP information and the non-GAAP financial measures.   

	Three months ended September 30,						Nine months ended September 30,
(Dollars in thousands)	2018			2017			2018			2017
Income Statement Non-GAAP measures and ratios
Interest income (GAAP)
Loans, excluding PCI loans	$	93,873		$	51,426		$	262,631		$	135,210
PCI loans		7,682			7,696			26,496			24,780
Securities - taxable		10,145			5,648			30,888			16,622
Securities - tax-exempt		1,601			1,400			4,718			3,918
Federal funds sold and other		1,362			887			3,718			2,374
Total Interest income (GAAP)		114,663			67,057			328,451			182,904
Tax equivalent adjustment
Non PCI loans		384			828			996		$	2,336
Securities - tax-exempt		273			682			800			1,902
Total tax equivalent adjustment		657			1,510			1,796			4,238
Interest income - tax equivalent
Loans excluding PCI loans		94,257			52,254			263,627			137,546
PCI loans		7,682			7,696			26,496			24,780
Securities - taxable		10,145			5,648			30,888			16,622
Securities - tax-exempt		1,874			2,082			5,518			5,820
Federal funds sold and other		1,362			887			3,718			2,374
Total interest income - tax equivalent		115,320			68,567			330,247			187,142
Total Interest expense (GAAP)		(12,810	)		(4,471	)		(31,051	)		(10,980	)
Net interest income - tax equivalent	$	102,510		$	64,096		$	299,196		$	176,162
Net interest income (GAAP)	$	101,853		$	62,586		$	297,400		$	171,924
Yields and costs
Yield on loans excluding PCI - tax equivalent		5.13	%		4.61	%		5.10	%		4.58	%
Yield on securities tax-exempt - tax equivalent		3.56	%		4.19	%		3.53	%		4.38	%
Yield on interest earning assets (GAAP)		4.82	%		4.46	%		4.82	%		4.47	%
Yield on interest earning assets - tax equivalent		4.85	%		4.56	%		4.85	%		4.57	%
Cost of interest bearing liabilities (GAAP)		0.82	%		0.46	%		0.69	%		0.42	%
Net interest spread (GAAP)		4.00	%		4.00	%		4.13	%		4.05	%
Net interest spread - tax equivalent		4.03	%		4.10	%		4.16	%		4.15	%
Net interest margin (GAAP)		4.28	%		4.16	%		4.37	%		4.20	%
Net interest margin - tax equivalent		4.31	%		4.26	%		4.39	%		4.31	%

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ITEM  3. QUANTITATIVE AND QUALITATIVE DISCLOSURES: MARKET RISK

Market risk

We believe interest rate risk is the most significant market risk impacting us. We monitor and manage interest rate risk using interest rate sensitivity “gap” analysis to measure the impact of market interest rate changes on net interest income. See our Annual Report on Form 10-K for the fiscal year ended December 31, 2017 for disclosure of the quantitative and qualitative information regarding the interest rate risk inherent in interest rate risk sensitive instruments as of December 31, 2017. There have been no changes in the assumptions used in monitoring interest rate risk as of September 30, 2018. The impact of other types of market risk, such as foreign currency exchange risk and equity price risk, is deemed immaterial.

ITEM 4. CONTROLS AND PROCEDURES

As of the end of the period covered by this report, an evaluation was carried out under the supervision and with the participation of our management, including the Chief Executive Officer (CEO) and Chief Financial Officer (CFO), of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e)). Based on that evaluation, the CEO and CFO have concluded that our disclosure controls and procedures are effective to ensure that information required to be disclosed by us in reports that we file or submit under the Securities Exchange Act of 1934 are recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms. There was no change in our internal control over financial reporting (as defined in Rules 13a-15(f) or 15d-15(f)) during the quarter covered by this report that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

74

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

None

Item 1a. Risk Factors

In addition to the other information set forth in this Quarterly Report, you should carefully consider the factors discussed in Part I, Item 1A. “Risk Factors” in our Annual Report on Form 10-K for our fiscal year ended December 31, 2017. The risks discussed in our Annual Report on Form 10-K could materially affect our business, financial condition and future results. The risks described in our Annual Report on Form 10-K are not the only risks facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be insignificant also may materially and adversely affect our business, financial condition or operating results in the future.

Item 2.Unregistered Sales of Equity Securities and Use of Proceeds

				Total Number	Maximum Number
				of Shares	of Shares that
		Total		Purchased as	may yet be
		Number of	Average	part of Publicly	Purchased Under
Period		Shares	Price paid	Announced Plans	the Plans or
Beginning	Ending	Purchased	per Share	or Programs	Programs
July 1, 2018	July 31, 2018	330	$29.87	---	3,000,000
August 1, 2018	August 31, 2018	---	---	---	3,000,000
September 1, 2018	September 30, 2018	660	$29.70	---	3,000,000
Total for quarter ending September 30, 2018		990	$29.76	---	3,000,000

We did not repurchase any shares of our common stock during the third quarter of 2018 pursuant to our stock repurchase plan currently in place. We repurchased 990 shares of our common stock from our employees during the third quarter of 2018 for settlement of certain tax withholding obligations related to certain equity based compensation awards.

Item 3. Defaults Upon Senior Securities

None.

Item 4. [Removed and Reserved]

Item 5. Other Information

None

75

Item 6. Exhibits

Exhibit 31.1	The Chairman, President and Chief Executive Officer’s certification required under section 302 of the Sarbanes-Oxley Act of 2002
Exhibit 31.2	The Chief Financial Officer’s certification required under section 302 of the Sarbanes-Oxley Act of 2002
Exhibit 32.1	The Chairman, President and Chief Executive Officer’s certification required under section 906 of the Sarbanes-Oxley Act of 2002
Exhibit 32.2	The Chief Financial Officer’s certification required under section 906 of the Sarbanes-Oxley Act of 2002
Exhibit 101.1	Interactive Data File
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Schema Document
101.CAL	XBRL Calculation Linkbase Document
101.DEF	XBRL Definition Linkbase Document
101.LAB	XBRL Label Linkbase Document
101.PRE	XBRL Presentation Linkbase Document

76

CENTERSTATE BANK CORPORATION

SIGNATURES

In accordance with the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

CENTERSTATE BANK CORPORATION

(Registrant)

Date: November 1, 2018	By:	/s/ John C. Corbett
		John C. Corbett
		President and Chief Executive Officer

Date: November 1, 2018	By:	/s/ Jennifer L. Idell
		Jennifer L. Idell
		Executive Vice President
		and Chief Financial Officer

77

EX-31.1

Exhibit 31.1

I, John C. Corbett, certify that:

1. I have reviewed this quarterly report on Form 10-Q of CenterState Bank Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 1, 2018	By:	/s/ John C. Corbett
		John C. Corbett
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

I, Jennifer L. Idell, certify that:

1. I have reviewed this quarterly report on Form 10-Q of CenterState Bank Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

e. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

f. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 1, 2018	By:	/s/ Jennifer L. Idell
		Jennifer L. Idell
		Executive Vice President
		and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION

In connection with the quarterly report of CenterState Bank Corporation (“Company”) on Form 10-Q for the period ended September 30, 2018 as filed with the Securities and Exchange Commission (“Report”), the undersigned does hereby certify pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and (2) to the best of my knowledge, the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 1, 2018	By:	/s/ John C. Corbett
		John C. Corbett
		President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION

In connection with the quarterly report of CenterState Bank Corporation (“Company”) on Form 10-Q for the period ended September 30, 2018 as filed with the Securities and Exchange Commission (“Report”), the undersigned does hereby certify pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and (2) to the best of my knowledge, the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 1, 2018	By:	/s/ Jennifer L. Idell
		Jennifer L. Idell
		Executive Vice President
		and Chief Financial Officer

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Entity Registrant Name	CenterState Bank Corporation
Trading Symbol	CSFL
Entity Central Index Key	0001102266
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		95,654,854

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 112,943	$ 68,571
Deposits in other financial institutions (restricted cash)	5,236	16,991
Federal funds sold and Federal Reserve Bank deposits	488,152	195,057
Cash and cash equivalents	606,331	280,619
Trading securities, at fair value		6,777
Investment securities available for sale, at fair value	1,536,842	1,060,143
Investment securities held to maturity (fair value of $211,262 and $231,615 at September 30, 2018 and December 31, 2017, respectively)	219,850	232,399
Loans held for sale (see Note 7)	39,554	19,647
Loans, excluding purchased credit impaired	8,055,421	4,609,063
Purchased credit impaired loans	167,671	164,158
Allowance for loan losses	(38,811)	(32,825)
Net Loans	8,184,281	4,740,396
Bank premises and equipment, net	224,506	141,886
Accrued interest receivable	32,972	18,628
Federal Home Loan Bank, Federal Reserve Bank and other stock, at cost	70,311	34,876
Goodwill	802,880	257,683
Core deposit intangible, net	69,133	24,063
Other intangible assets, net	2,925	551
Bank owned life insurance	267,979	146,739
Other repossessed real estate owned	4,643	3,987
Deferred income tax asset, net	60,839	37,725
Bank property held for sale	27,081	11,354
Interest rate swap derivatives, at fair value	87,946	42,480
Prepaid expense and other assets	36,292	64,022
TOTAL ASSETS	12,274,365	7,123,975
Deposits:
Demand - non-interest bearing	3,094,652	1,999,901
Demand - interest bearing	1,702,467	1,058,985
Savings and money market accounts	2,815,119	1,668,954
Time deposits	1,862,288	832,683
Total deposits	9,474,526	5,560,523
Securities sold under agreement to repurchase	51,311	52,080
Federal funds purchased	272,002	331,490
Other borrowed funds	371,000	175,000
Corporate debentures	41,328	26,192
Accrued interest payable	2,570	1,169
Interest rate swap derivatives, at fair value	88,065	43,259
Payables and accrued expenses	60,404	29,512
Total liabilities	10,361,206	6,219,225
Stockholders' equity:
Common stock, $.01 par value: 200,000,000 shares authorized; 95,636,051 and 60,161,334 shares issued and outstanding at September, 2018 and December 31, 2017, respectively	956	602
Additional paid-in capital	1,697,396	737,905
Retained earnings	252,695	173,248
Accumulated other comprehensive loss	(37,888)	(7,005)
Total stockholders' equity	1,913,159	904,750
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 12,274,365	$ 7,123,975

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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Held-to-maturity securities, fair value	$ 211,262	$ 231,615
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	95,636,051	60,161,334
Common stock, shares outstanding	95,636,051	60,161,334

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Loans		$ 101,555	$ 59,122	$ 289,127	$ 159,990
Investment securities:
Taxable		10,145	5,648	30,888	16,622
Tax-exempt		1,601	1,400	4,718	3,918
Federal funds sold and other		1,362	887	3,718	2,374
Total interest income		114,663	67,057	328,451	182,904
Interest expense:
Deposits		9,096	3,178	20,900	7,694
Securities sold under agreement to repurchase		169	80	429	157
Federal funds purchased and other borrowings		2,966	866	8,156	2,131
Corporate debentures		579	347	1,566	998
Total interest expense		12,810	4,471	31,051	10,980
Net interest income		101,853	62,586	297,400	171,924
Provision for loan losses		1,950	1,096	6,183	3,990
Net interest income after loan loss provision		99,903	61,490	291,217	167,934
Non interest income:
Correspondent banking capital markets revenue		7,258	5,823	20,156	18,067
Other correspondent banking related revenue		1,038	1,390	3,339	3,658
SBA income		1,020	249	3,035	442
Debit, prepaid, ATM and merchant card related fees		3,869	2,127	11,094	6,716
Wealth management related revenue		676	914	1,932	2,698
Bank owned life insurance income		1,490	975	4,258	2,310
Other non interest income		2,778	989	5,051	2,127
Net loss on sale of securities available for sale				(22)	0
Total other income		27,104	16,741	72,731	48,217
Non interest expense:
Salaries, wages and employee benefits		41,698	28,515	124,274	79,714
Occupancy expense		5,428	3,422	15,264	9,453
Depreciation of premises and equipment		2,439	1,842	7,036	5,363
Supplies, stationary and printing		588	392	1,682	1,180
Marketing expenses		1,493	955	4,332	2,885
Data processing expense		2,729	2,006	10,687	6,251
Legal, audit and other professional fees		1,301	854	3,564	2,674
Amortization of intangibles		2,480	1,133	7,029	2,937
Postage and delivery		711	512	2,145	1,431
ATM and debit card related expenses		972	746	2,596	2,102
Bank regulatory expenses		1,367	666	3,586	2,284
Gain on sale of repossessed real estate (“OREO”)		(294)	(38)	(1,193)	(200)
Valuation write down of repossessed real estate (“OREO”)		170	141	464	612
(Gain) loss on repossessed assets other than real estate		(9)	(13)	10	(19)
Foreclosure related expenses		821	437	2,056	1,665
Merger related expenses		10,395	0	33,244	10,328
Impairment on bank property held for sale		247	0	2,587	507
Other expenses		4,803	3,052	13,584	8,307
Total other expenses		77,339	44,622	232,947	137,474
Income before provision for income taxes		49,668	33,609	131,001	78,677
Provision for income taxes		11,683	11,559	25,217	24,794
Net income		37,985	22,050	105,784	53,883
Other comprehensive (loss) income, net of tax:
Unrealized securities holding (loss) gain, net of income taxes of ($1,979), ($389), ($9,950) and $5,210, respectively		(7,354)	(620)	(30,899)	8,296
Less: reclassified adjustments for loss included in net income, net of income taxes of $0, $0, ($6) and $0, respectively				16
Net unrealized (loss) gain on available for sale securities, net of income taxes		(7,354)	(620)	(30,883)	8,296
Total comprehensive income		$ 30,631	$ 21,430	$ 74,901	$ 62,179
Earnings per share:
Basic		$ 0.43	$ 0.37	$ 1.24	$ 0.95
Diluted		$ 0.43	$ 0.36	$ 1.23	$ 0.94
Common shares used in the calculation of earnings per share:
Basic	[1]	87,813,671	59,906,610	84,958,277	56,315,700
Diluted	[1]	88,810,702	61,115,005	86,209,709	57,330,267
Mortgage Banking Income
Non interest income:
Non interest income		$ 3,188	$ 404	$ 8,406	$ 932
Service Charges on Deposit Accounts
Non interest income:
Non interest income		$ 5,787	$ 3,870	$ 15,482	$ 11,267

[1] Excludes participating shares.

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Unrealized securities holding (loss) gain, income taxes	$ (1,979)	$ (389)	$ (9,950)	$ 5,210
Reclassifications of loss included in net income, income taxes	$ 0	$ 0	$ (6)	$ 0

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Charter Financial Corporation [Member]	Platinum Bank Holding Company [Member]	Gateway Financial Holdings Of Florida Inc [Member]	Sunshine Bancorp, Inc. [Member]	HCBF Holding Company, Inc. [Member]	Common Stock [Member]	Common Stock [Member] Charter Financial Corporation [Member]	Common Stock [Member] Platinum Bank Holding Company [Member]	Common Stock [Member] Gateway Financial Holdings Of Florida Inc [Member]	Common Stock [Member] Sunshine Bancorp, Inc. [Member]	Common Stock [Member] HCBF Holding Company, Inc. [Member]	Additional Paid in Capital [Member]	Additional Paid in Capital [Member] Charter Financial Corporation [Member]	Additional Paid in Capital [Member] Platinum Bank Holding Company [Member]	Additional Paid in Capital [Member] Gateway Financial Holdings Of Florida Inc [Member]	Additional Paid in Capital [Member] Sunshine Bancorp, Inc. [Member]	Additional Paid in Capital [Member] HCBF Holding Company, Inc. [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balances at beginning at Dec. 31, 2016	$ 552,457						$ 482						$ 430,459						$ 130,090	$ (8,574)
Balances at beginning, shares at Dec. 31, 2016							48,146,981
Net income	53,883																		53,883
Unrealized holding gain (loss) on available for sale securities, net of deferred income tax	8,296																			8,296
Dividends paid - common	(10,269)																		(10,269)
Stock grants issued	403						$ 2						401
Stock grants issued, shares							240,075
Stock based compensation expense	3,333												3,333
Stock options exercised	5,313						$ 5						5,308
Stock options exercised, Shares							479,864
Stock repurchase	(787)						$ (1)						(786)
Stock repurchase, shares							(32,224)
Stock issued pursuant to acquisition			$ 110,833	$ 107,087					$ 43	$ 43					$ 110,790	$ 107,044
Stock issued pursuant to acquisition, shares									4,279,255	4,244,441
Stock options acquired and converted pursuant to acquisition				$ 15,811												$ 15,811
Stock issued pursuant to public offering, net of costs, shares							2,695,000
Stock issued pursuant to public offering, net of costs of $529	63,262						$ 27						63,235
Balances at ending at Sep. 30, 2017	909,622						$ 601						735,595						173,704	(278)
Balances at ending, shares at Sep. 30, 2017							60,053,392
Balances at beginning at Jun. 30, 2017	890,258						$ 600						734,059						155,257	342
Balances at beginning, shares at Jun. 30, 2017							60,002,604
Net income	22,050																		22,050
Unrealized holding gain (loss) on available for sale securities, net of deferred income tax	(620)																			(620)
Dividends paid - common	(3,603)																		(3,603)
Stock grants issued	183												183
Stock grants issued, shares							22,641
Stock based compensation expense	1,080												1,080
Stock options exercised	304						$ 1						303
Stock options exercised, Shares							29,319
Stock repurchase	(30)												(30)
Stock repurchase, shares							(1,172)
Balances at ending at Sep. 30, 2017	909,622						$ 601						735,595						173,704	(278)
Balances at ending, shares at Sep. 30, 2017							60,053,392
Balances at beginning at Dec. 31, 2017	$ 904,750						$ 602						737,905						173,248	(7,005)
Balances at beginning, shares at Dec. 31, 2017	60,161,334						60,161,334
Net income	$ 105,784																		105,784
Unrealized holding gain (loss) on available for sale securities, net of deferred income tax	(30,883)																			(30,883)
Dividends paid - common	(26,337)																		(26,337)
Stock grants issued	650						$ 2						648
Stock grants issued, shares							235,521
Stock based compensation expense	3,012												3,012
Stock options exercised	14,252						$ 18						14,234
Stock options exercised, Shares							1,751,194
Stock repurchase	(1,027)						$ (1)						(1,026)
Stock repurchase, shares							(38,496)
Stock issued pursuant to acquisition		$ 349,809			$ 181,413	$ 387,279		$ 114			$ 70	$ 151		$ 349,695			$ 181,343	$ 387,128
Stock issued pursuant to acquisition, shares								11,424,214			7,050,645	15,051,639
Stock options acquired and converted pursuant to acquisition					$ 6,432	$ 18,025											$ 6,432	$ 18,025
Balances at ending at Sep. 30, 2018	$ 1,913,159						$ 956						1,697,396						252,695	(37,888)
Balances at ending, shares at Sep. 30, 2018	95,636,051						95,636,051
Balances at beginning at Jun. 30, 2018	$ 1,540,248						$ 841						1,345,671						224,270	(30,534)
Balances at beginning, shares at Jun. 30, 2018							84,120,421
Net income	37,985																		37,985
Unrealized holding gain (loss) on available for sale securities, net of deferred income tax	(7,354)																			(7,354)
Dividends paid - common	(9,560)																		(9,560)
Stock grants issued	650												650
Stock grants issued, shares							40,370
Stock based compensation expense	1,012												1,012
Stock options exercised	398						$ 1						397
Stock options exercised, Shares							52,036
Stock repurchase	(29)												(29)
Stock repurchase, shares							(990)
Stock issued pursuant to acquisition		$ 349,809						$ 114						$ 349,695
Stock issued pursuant to acquisition, shares								11,424,214
Balances at ending at Sep. 30, 2018	$ 1,913,159						$ 956						$ 1,697,396						$ 252,695	$ (37,888)
Balances at ending, shares at Sep. 30, 2018	95,636,051						95,636,051

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Member]
Unrealized holding gain on available for sale securities, deferred income tax	$ 1,979	$ 389	$ 9,966	$ 5,210
Retained Earnings [Member]
Dividends paid - common, per share	$ 0.10	$ 0.12	$ 0.30	$ 0.18
Additional Paid in Capital [Member]
Public Offering Costs				$ 529

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 105,784	$ 53,883
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	6,183	3,990
Depreciation of premises and equipment	7,036	5,363
Accretion of purchase accounting adjustments	(37,725)	(26,653)
Net amortization of investment securities	9,713	7,389
Net deferred loan origination fees	1,277	314
Loss on sale of securities available for sale	22	0
Trading securities revenue	(12)	(192)
Purchases of trading securities	(234,190)	(186,523)
Proceeds from sale of trading securities	240,979	196,125
Repossessed real estate owned valuation write down	464	612
Gain on sale of repossessed real estate owned	(1,193)	(200)
Loss (gain) on repossessed assets other than real estate	10	(19)
Gain on sale of residential loans held for sale	(6,612)	(932)
Residential loans originated and held for sale	(242,226)	(53,806)
Proceeds from sale of residential loans held for sale	238,613	44,780
Change in fair value of residential loans held for sale	(723)	0
Gain on disposal of and or sale of fixed assets	(762)	(217)
Gain on disposal of bank property held for sale	(1,745)	(304)
Impairment on bank property held for sale	2,587	507
Gain on sale of small business administration loans	(3,035)	(442)
Small business administration loans originated for sale	(29,448)	(6,623)
Proceeds from sale of small business administration loans	32,483	7,065
Gain on sale of deposits	(611)	0
Deferred income taxes	14,559	10,018
Tax deduction in excess of book deduction for stock awards	(6,017)	(2,407)
Stock based compensation expense	3,012	3,333
Bank owned life insurance income	(4,258)	(2,310)
Net cash from changes in:
Net changes in accrued interest receivable, prepaid expenses, and other assets	56,911	5,447
Net change in accrued interest payable, accrued expense, and other liabilities	2,509	7,973
Net cash provided by operating activities	153,585	66,171
Cash flows from investing activities:
Purchases of investment securities	(94,602)	(46,472)
Purchases of mortgage backed securities	(290,645)	(165,347)
Proceeds from pay-downs of mortgage backed securities	161,779	91,530
Proceeds from sales of investment securities	58,768	104,260
Proceeds from sales of mortgage backed securities	305,384	156,564
Proceeds from called investment securities	1,045	710
Proceeds from maturities of investment securities	61,000	1,000
Purchases of investment securities	0	(2,693)
Purchases of mortgage backed securities	0	(1,695)
Proceeds from pay-downs of mortgage backed securities	11,513	15,797
Purchases of FHLB and FRB stock	(17,398)	(9,304)
Proceeds from sales of FHLB and FRB stock	20,944	5,572
Net increase in loans	(259,358)	(202,434)
Purchases of premises and equipment, net	(17,525)	(8,124)
Proceeds from sale of repossessed real estate	9,201	3,794
Proceeds from sale of fixed assets	2,661	548
Proceeds from sale of bank property held for sale	12,350	6,413
Purchase of bank owned life insurance	0	(30,000)
Net cash from bank acquisitions	229,689	86,530
Net cash provided by investing activities	194,806	6,649
Cash flows from financing activities:
Net increase in deposits	93,831	45,367
Sale of deposits	25,341	0
Net (decrease) increase in securities sold under agreement to repurchase	(1,122)	12,104
Net (decrease) increase in federal funds purchased	(59,488)	73,545
Net decrease in other borrowings	(67,920)	(134,732)
Net decrease in payable to shareholders for acquisitions	(209)	(48)
Stock options exercised	14,252	5,313
Proceeds from stock offering, net of offering costs	0	63,262
Stock repurchased	(1,027)	(787)
Dividends paid	(26,337)	(10,269)
Net cash (used in) provided by financing activities	(22,679)	53,755
Net increase in cash and cash equivalents	325,712	126,575
Cash and cash equivalents, beginning of period	280,619	175,654
Cash and cash equivalents, end of period	606,331	302,229
Transfer of loans to other real estate owned	3,727	2,614
Transfers of bank property to held for sale	3,502	4,136
Cash paid during the period for:
Interest	31,655	12,323
Income taxes	$ 11,299	$ 8,893

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Nature of Operations and Basis of Presentation

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Nature of Operations and Basis of Presentation

NOTE 1: Nature of operations and basis of presentation

The consolidated financial statements include the accounts of CenterState Bank Corporation (the “Parent Company,” “Company” or “CSFL”), and its wholly owned subsidiary bank, CenterState Bank, N.A. (“CenterState” or “Bank”), and non-bank subsidiaries, R4ALL, Inc. and CSFL Insurance Corp. The Company operates as one of the largest community bank franchises headquartered in the state of Florida. The Bank provides traditional retail, commercial, mortgage, wealth management and SBA services throughout its Florida, Georgia and Alabama branch network and customer relationships in neighboring states.    

The Bank also operates a correspondent banking and capital markets division headquartered in Winter Haven, Florida, although the majority of its bond salesmen, traders and operational personnel are physically housed in leased facilities located in Birmingham, Alabama and Atlanta, Georgia. This division’s primary revenue generating activities are related to its capital markets division, which includes commissions earned on fixed income security sales, fees from hedging services, loan brokerage fees and consulting fees for services related to these activities; and its correspondent banking division, which includes spread income earned on correspondent bank deposits (i.e. federal funds purchased) and correspondent bank checking account deposits and fees from safe-keeping activities, bond accounting services for correspondents, asset/liability consulting related activities, international wires, and other clearing and corporate checking account services. The customer base includes small to medium size financial institutions primarily located in the Southeastern United States.

R4ALL, Inc. purchases troubled loans from the Bank and manages their eventual disposition.  CSFL Insurance Corp. is a captive insurance subsidiary pursuant to Section 831(b) of the U.S. Tax Code.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial statements and with the instructions to Form 10-Q. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. These statements should be read in conjunction with the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2017. In the Company’s opinion, all adjustments, consisting primarily of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods have been made. The results of operations of the three and nine month periods ended September 30, 2018 are not necessarily indicative of the results expected for the full year.

Some items in the prior period financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior period net income or shareholders’ equity.

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Common Stock Outstanding and Earnings Per Share Data

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Common Stock Outstanding and Earnings Per Share Data

NOTE 2: Common stock outstanding and earnings per share data

The two-class method is used in the calculation of basic and diluted earnings per share.  Under the two-class method, earnings available to common shareholders for the period are allocated between common shareholders and participating securities according to dividends declared (or accumulated) and participation rights in undistributed earnings.  There were 0 anti-dilutive stock options for the three and nine month periods ending September 30, 2018 and 2017.  The following table presents the factors used in the earnings per share computations for the periods indicated.

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Basic
Net income available to common shareholders	$	37,985		$	22,050		$	105,784		$	53,883
Less: Earnings allocated to participating securities		(28	)		(46	)		(84	)		(121	)
Net income allocated to common shareholders	$	37,957		$	22,004		$	105,700		$	53,762
Weighted average common shares outstanding
including participating securities		87,881,806			60,032,804			85,026,929			56,442,506
Less: Participating securities (1)		(68,135	)		(126,194	)		(68,652	)		(126,806	)
Average shares		87,813,671			59,906,610			84,958,277			56,315,700
Basic earnings per common share	$	0.43		$	0.37		$	1.24		$	0.95
Diluted
Net income available to common shareholders	$	37,957		$	22,004		$	105,700		$	53,762
Weighted average common shares outstanding for
basic earnings per common share		87,813,671			59,906,610			84,958,277			56,315,700
Add: Dilutive effects of stock based compensation awards		997,031			1,208,395			1,251,432			1,014,567
Average shares and dilutive potential common shares		88,810,702			61,115,005			86,209,709			57,330,267
Diluted earnings per common share	$	0.43		$	0.36		$	1.23		$	0.94

1. Participating securities are restricted stock awards whereby the stock certificates have been issued, are included in outstanding shares, receive dividends and can be voted, but have not vested.   

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Fair Value

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value

NOTE 3: Fair value

Generally accepted accounting principles establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.

Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing and asset or liability.

The fair values of securities available for sale, excluding corporate debt securities, are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The fair values of corporate debt securities are calculated using market indicators such as broker quotes (Level 2).

The fair values of trading securities are determined as follows: (1) for those securities that have traded prior to the date of the consolidated balance sheet but have not settled (date of sale) until after such date, the sales price is used as the fair value (Level 1); and, (2) for those securities which have not traded as of the date of the consolidated balance sheet, the fair value was determined by broker price indications of similar or same securities (Level 2).

For periods prior to December 31, 2017, mortgage loans held for sale were valued at the lower of cost or fair value.  Effective January 1, 2018, the Company elected to account for these loans under the fair value option with changes in fair value recognized in current period earnings.  These loans are intended for sale and the Company believes that the fair value is the best indicator of the resolution of these loans (Level 2).  In conjunction with the fair value election on loans held for sale, Mortgage banking uses derivative forward sales contracts and interest rate lock commitments on residential mortgage loans.  Fair values of these mortgage derivatives are estimated based on changes in mortgage interest rates from the date the interest on the loan is locked (Level 3).  

The fair value of interest rate swap derivatives is based on valuation models using observable market data as of the measurement date (Level 2). The derivatives are traded in an over-the-counter market where quoted market prices are not always available. Therefore, fair values of derivatives are determined using quantitative models that utilize multiple market inputs. The inputs will vary based on the type of derivative, but could include interest rates, prices and indices to generate continuous yield or pricing curves, prepayment rates, and volatility factors to value the position. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services.

Assets and liabilities measured at fair value on a recurring basis are summarized below.

			Fair value measurements using
			Quoted prices	Significant
			in active	other		Significant
			markets for	observable		unobservable
	Carrying		identical assets	inputs		inputs
	value		(Level 1)	(Level 2)		(Level 3)
at September 30, 2018
Assets:
Available for sale securities
Corporate debt securities	$	6,361	—	$	6,361	—
Obligations of U.S. government sponsored entities and agencies		39,644	—		39,644	—
Mortgage backed securities		1,412,459	—		1,412,459	—
Municipal securities		78,378	—		78,378	—
Loans held for sale, at fair value		39,554	—		39,554	—
Mortgage banking derivatives		938	—	—			938
Interest rate swap derivatives		87,946	—		87,946	—
Liabilities:
Mortgage banking derivatives		27	—	—			27
Interest rate swap derivatives		88,065	—		88,065	—
at December 31, 2017
Assets:
Trading securities	$	6,777	—	$	6,777	—
Available for sale securities
U.S. Treasury securities		5,200	—		5,200	—
Obligations of U.S. government sponsored entities and agencies		9,574	—		9,574	—
Mortgage backed securities		972,611	—		972,611	—
Municipal securities		72,758	—		72,758	—
Interest rate swap derivatives		42,480	—		42,480	—
Liabilities:
Interest rate swap derivatives		43,259	—		43,259	—

The fair value of impaired loans with specific valuation allowance for loan losses and other real estate owned is based on recent real estate appraisals. For residential real estate impaired loans and other real estate owned, appraised values are based on the comparative sales approach. For commercial and commercial real estate impaired loans, and other real estate owned, appraisers may use either a single valuation approach or a combination of approaches such as comparative sales, cost or the income approach. A significant unobservable input in the income approach is the estimated income capitalization rate for a given piece of collateral. At September 30, 2018, the range of capitalization rates utilized to determine the fair value of the underlying collateral ranged from 7% to 10%. Adjustments to appraisals may be made by the appraiser to reflect local market conditions or other economic factors and may

result in changes in the fair value of a given asset over time. As such, the fair value of impaired loans, other real estate owned and bank property held for sale are considered a Level 3 in the fair value hierarchy.

Assets and liabilities measured at fair value on a non-recurring basis are summarized below.

			Fair value measurements using
					Significant
			Quoted prices in		other		Significant
			active markets for		observable		unobservable
	Carrying		identical assets		inputs		inputs
	value		(Level 1)		(Level 2)		(Level 3)
at September 30, 2018
Assets:
Impaired loans
Residential real estate	$	2,312	—		—		$	2,312
Commercial real estate		5,350	—		—			5,350
Land, land development and construction		942	—		—			942
Commercial		251	—		—			251
Consumer		52	—		—			52
Other real estate owned
Residential real estate		117						117
Commercial real estate		261	—		—			261
Land, land development and construction		1,312	—		—			1,312
Bank property held for sale		5,805	—		—			5,805
at December 31, 2017
Assets:
Impaired loans
Residential real estate	$	2,423		—		—	$	2,423
Commercial real estate		6,293		—		—		6,293
Land, land development and construction		292		—		—		292
Commercial		2,131		—		—		2,131
Consumer		57		—		—		57
Other real estate owned
Residential real estate		635		—		—		635
Commercial real estate		261		—		—		261
Land, land development and construction		1,481		—		—		1,481
Bank property held for sale		1,516		—		—		1,516

Impaired loans measured at fair value had a recorded investment of $10,102 with a valuation allowance of $1,195, at September 30, 2018, and a recorded investment of $11,673, with a valuation allowance of $477, at December 31, 2017. The Company recorded a provision for loan loss expense of $682 and $1,026 on these loans during the three and nine month periods ending September 30, 2018.  The Company recorded a provision for loan loss expense of $384 and $779 on impaired loans carried at fair value during the three and nine month periods ending September 30, 2017.

Other real estate owned had a decline in fair value of $170, $141, $464 and $612 during the three and nine month periods ending September 30, 2018 and 2017, respectively.  Changes in fair value were recorded directly to current earnings through non interest expense.

Bank property held for sale represents certain branch office buildings which the Company has closed and consolidated with other existing branches. The real estate was transferred out of the Bank Premises and Equipment category into bank property held for sale at the lower of amortized cost or fair value less estimated costs to sell. The fair values were based upon appraisals.  The Company recognized an impairment charge of $247, $0, $2,587 and $507 during the three and nine month periods ending September 30, 2018 and 2017, respectively, related to bank properties held for sale.  

Fair Value of Financial Instruments

The methods and assumptions, not previously presented, used to estimate fair value are described as follows:

Cash and Cash Equivalents: The carrying amounts of cash and cash equivalents approximate fair values and are classified as Level 1.

FHLB, FRB and Other Stock: It is not practical to determine the fair value of FHLB, FRB and other stock due to restrictions placed on their transferability.

Investment securities held to maturity:  The fair values of securities held to maturity are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs).

Loans, net: ASU 2016-1, "Recognition and Measurement of Financial Assets and Financial Liabilities," requires the Company to use the exit price notion when measuring fair value of financial instruments for disclosure purposes effective January 1, 2018, therefore the fair value presented in the following table may not be comparable to prior period.  For performing loans, the fair value is determined based on a discounted cash flow analysis (income approach).  The discounted cash flow was based on contractual maturity of the loan and market indications of rates, prepayment speeds, defaults and credit risk resulting in Level 3 classification.  For non-performing loans, the fair value is determined based on the estimated values of the underlying collateral or individual analysis of receipts (asset approach) resulting in Level 3 classification.  At December 31, 2017, the fair values of loans, excluding loans held for sale, were estimated as follows: for variable rate loans that reprice frequently and with no significant change in credit risk, fair values were based on carrying values resulting in a Level 3 classification. Fair values for other loans were estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality resulting in a Level 3 classification. Impaired loans were valued as described previously.

Accrued Interest Receivable: The carrying amount of accrued interest receivable approximates fair value and is classified as Level 2 for accrued interest receivable related to investment securities and Level 3 for accrued interest receivable related to loans.

Deposits: The fair values disclosed for demand deposits (e.g., interest and non-interest checking, savings, and money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amount) resulting in Level 1 classification. Fair values for fixed rate certificates of deposit are estimated using a discounted cash flows calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits resulting in a Level 2 classification.

Short-term Borrowings: The carrying amounts of federal funds purchased, borrowings under repurchase agreements, and other short-term borrowings, generally maturing within ninety days, approximate their fair values resulting in a Level 2 classification.

Corporate Debentures: The fair values of the Company’s corporate debentures are estimated using discounted cash flow analyses based on the current borrowing rates for similar types of borrowing arrangements resulting in a Level 3 classification.

Accrued Interest Payable: The carrying amount of accrued interest payable approximates fair value resulting in a Level 2 classification.

Off-balance Sheet Instruments: The fair value of off-balance-sheet items is not considered material.

The following table presents the carry amounts and estimated fair values of the Company’s financial instruments:

			Fair value measurements
at September 30, 2018	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	606,331	$	606,331	$	—	$	—	$	606,331
Investment securities available for sale		1,536,842		—		1,536,842		—		1,536,842
Investment securities held to maturity		219,850		—		211,262		—		211,262
FHLB, FRB and other stock		70,311		—		—		—	n/a
Loans held for sale, at fair value		39,554		—		39,554		—		39,554
Loans, net		8,184,281		—		—		8,125,840		8,125,840
Mortgage banking derivatives		938		—		—		938		938
Interest rate swap derivatives		87,946		—		87,946		—		87,946
Accrued interest receivable		32,972		—		6,798		26,174		32,972
Financial liabilities:
Deposits- without stated maturities	$	7,612,238	$	7,612,238	$	—	$	—	$	7,612,238
Deposits- with stated maturities		1,862,288		—		1,867,827		—		1,867,827
Securities sold under agreement to repurchase		51,311		—		51,311		—		51,311
Federal funds purchased and other borrowings		643,002		—		643,002		—		643,002
Corporate debentures		41,328		—		—		37,928		37,928
Mortgage banking derivatives		27		—		—		27		27
Interest rate swap derivatives		88,065		—		88,065		—		88,065
Accrued interest payable		2,570		—		2,570		—		2,570

			Fair value measurements
at December 31, 2017	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	280,619	$	280,619	$	—	$	—	$	280,619
Trading securities		6,777		—		6,777		—		6,777
Investment securities available for sale		1,060,143		—		1,060,143		—		1,060,143
Investment securities held to maturity		232,399		—		231,615		—		231,615
FHLB and FRB stock		34,876		—		—		—	n/a
Loans held for sale		19,647		—		19,647		—		19,647
Loans, net		4,740,396		—		—		4,731,514		4,731,514
Interest rate swap derivatives		42,480		—		42,480		—		42,480
Accrued interest receivable		18,628		—		5,370		13,258		18,628
Financial liabilities:
Deposits- without stated maturities	$	4,727,840	$	4,727,840	$	—	$	—	$	4,727,840
Deposits- with stated maturities		832,683		—		845,039		—		845,039
Securities sold under agreement to repurchase		52,080		—		52,080		—		52,080
Federal funds purchased and other borrowings		506,490		—		506,490		—		506,490
Corporate debentures		26,192		—		—		22,363		22,363
Interest rate swap derivatives		43,259		—		43,259		—		43,259
Accrued interest payable		1,169		—		1,169		—		1,169

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Reportable Segments

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Reportable Segments

NOTE 4: Reportable segments

The Company’s reportable segments represent the distinct product lines the Company offers and are viewed separately for strategic planning purposes by management. The table below is a reconciliation of the reportable segment revenues, expenses, and profit to the Company’s consolidated total for the three and nine month periods ending September 30, 2018 and 2017.

	Three month period ending September 30, 2018
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	110,764		$	3,899		$	—		$	—		$	114,663
Interest expense		(9,992	)		(2,005	)		(813	)		—			(12,810	)
Net interest income (expense)		100,772			1,894			(813	)		—			101,853
Provision for loan losses		(1,965	)		15			—			—			(1,950	)
Non interest income		18,808			8,296			—			—			27,104
Non interest expense		(70,652	)		(5,678	)		(1,009	)		—			(77,339	)
Net income (loss) before taxes		46,963			4,527			(1,822	)		—			49,668
Income tax (provision) benefit		(11,086	)		(1,147	)		550			—			(11,683	)
Net income	$	35,877		$	3,380		$	(1,272	)	$	—		$	37,985
Total assets	$	11,604,329		$	661,880		$	1,969,635		$	(1,961,479	)	$	12,274,365

	Nine month period ending September 30, 2018
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	317,851		$	10,600		$	—		$	—		$	328,451
Interest expense		(23,689	)		(4,734	)		(2,628	)		—			(31,051	)
Net interest income (expense)		294,162			5,866			(2,628	)		—			297,400
Provision for loan losses		(6,039	)		(144	)		—			—			(6,183	)
Non interest income		49,228			23,495			8			—			72,731
Non interest expense		(213,934	)		(16,172	)		(2,841	)		—			(232,947	)
Net income (loss) before taxes		123,417			13,045			(5,461	)		—			131,001
Income tax (provision) benefit		(28,585	)		(3,305	)		6,673			—			(25,217	)
Net income (loss)	$	94,832		$	9,740		$	1,212		$	—		$	105,784
Total assets	$	11,604,329		$	661,880		$	1,969,635		$	(1,961,479	)	$	12,274,365

	Three month period ending September 30, 2017
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	64,410		$	2,647		$	—		$	—		$	67,057
Interest expense		(3,305	)		(819	)		(347	)		—			(4,471	)
Net interest income (expense)		61,105			1,828			(347	)		—			62,586
Provision for loan losses		(1,113	)		17			—			—			(1,096	)
Non interest income		9,528			7,213			—			—			16,741
Non interest expense		(38,432	)		(5,304	)		(886	)		—			(44,622	)
Net income (loss) before taxes		31,088			3,754			(1,233	)		—			33,609
Income tax (provision) benefit		(10,579	)		(1,448	)		468			—			(11,559	)
Net income	$	20,509		$	2,306		$	(765	)	$	—		$	22,050
Total assets	$	6,319,532		$	498,669		$	940,571		$	(935,911	)	$	6,822,861

	Nine month period ending September 30, 2017
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	175,015		$	7,889		$	—		$	—		$	182,904
Interest expense		(7,934	)		(2,048	)		(998	)		—			(10,980	)
Net interest income (expense)		167,081			5,841			(998	)		—			171,924
Provision for loan losses		(4,073	)		83			—			—			(3,990	)
Non interest income		26,493			21,724			—			—			48,217
Non interest expense		(119,304	)		(15,594	)		(2,576	)		—			(137,474	)
Net income (loss) before taxes		70,197			12,054			(3,574	)		—			78,677
Income tax (provision) benefit		(22,900	)		(4,649	)		2,755			—			(24,794	)
Net income (loss)	$	47,297		$	7,405		$	(819	)	$	—		$	53,883
Total assets	$	6,319,532		$	498,669		$	940,571		$	(935,911	)	$	6,822,861

Commercial and retail banking: The Company’s primary business is commercial and retail banking. Currently, the Company operates primarily through the Bank providing traditional retail, commercial, mortgage, wealth management and SBA services throughout its Florida, Georgia and Alabama branch network and customer relationships in neighboring states.

Correspondent banking and capital markets division: Operating as a division of our Bank, the correspondent area’s primary revenue generating activities are related to the capital markets division which includes commissions earned on fixed income security sales, fees from hedging services, loan brokerage fees and consulting fees for services related to these activities. Income generated related to the correspondent banking services includes spread income earned on correspondent bank deposits (i.e. federal funds purchased) and fees generated from safe-keeping activities, bond accounting services, asset/liability consulting services, international wires, clearing and corporate checking account services and other correspondent banking related services. The fees derived from the correspondent banking services are less volatile than those generated through the capital markets group. The customer base includes small to medium size financial institutions primarily located in Southeastern United States.

Corporate overhead and administration: Corporate overhead and administration is comprised primarily of compensation and benefits for certain members of management, interest on parent company debt, office occupancy and depreciation of parent company facilities, certain merger related costs and other expenses.

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Investment securities

9 Months Ended

Sep. 30, 2018

Investments Debt And Equity Securities [Abstract]

Investment securities

NOTE 5: Investment securities

Available-for-Sale

All of the mortgage backed securities listed below were issued by U.S. government sponsored entities and agencies, primarily Fannie Mae, Freddie Mac and Ginnie Mae, institutions which the government has affirmed its commitment to support. The fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:

	September 30, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Corporate debt securities	$	6,265	$	96	$	—	$	6,361
Obligations of U.S. government sponsored entities and agencies		40,882		6		1,244		39,644
Mortgage backed securities		1,460,552		54		48,147		1,412,459
Municipal securities		79,375		151		1,148		78,378
Total available-for-sale	$	1,587,074	$	307	$	50,539	$	1,536,842
	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. Treasury securities	$	5,000	$	200	$	—	$	5,200
Obligations of U.S. government sponsored entities and agencies		10,000		—		426		9,574
Mortgage backed securities		982,565		752		10,706		972,611
Municipal securities		71,961		863		66		72,758
Total available-for-sale	$	1,069,526	$	1,815	$	11,198	$	1,060,143

The cost of securities sold is determined using the specific identification method. The securities sold during the first quarter of 2018 include some securities acquired through the acquisitions of Sunshine Bancorp, Inc. (“Sunshine”) and HCBF Holding Company, Inc. (“Harbor”) on January 1, 2018. These acquired securities were marked to fair value and subsequently sold after the acquisition date, and no gain or loss was recognized from the sale of these securities.  Sales of available for sale securities for the nine months ended September 30, 2018 and 2017 were as follows:

For the nine months ended:	September 30, 2018		September 30, 2017
Proceeds	$	364,152	$	260,824
Gross gains		68		—
Gross losses		90		—

The tax provision related to these net realized gains was ($6) and $0, respectively.

The fair value of available for sale securities at September 30, 2018 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately.

	Fair		Amortized
Investment securities available for sale:	Value		Cost
Due one year or less	$	782	$	781
Due after one year through five years		5,537		5,502
Due after five years through ten years		29,657		30,535
Due after ten years through thirty years		88,407		89,704
Mortgage backed securities		1,412,459		1,460,552
Total available-for-sale	$	1,536,842	$	1,587,074

Available for sale securities pledged at September 30, 2018 and December 31, 2017 had a carrying amount (estimated fair value) of $884,542 and $255,788 respectively. These securities were pledged primarily to increase borrowing capacity at the FHLB, secure public deposits and repurchase agreements.

At September 30, 2018 and December 31, 2017, there were no holdings of securities of any one issuer, other than mortgage backed securities issued by U.S. Government sponsored entities, in an amount greater than 10% of stockholders’ equity.

The following tables show the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2018 and December 31, 2017.

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Obligations of U.S. government sponsored entities and agencies	$	27,193	$	352	$	9,108	$	892	$	36,301	$	1,244
Mortgage backed securities		1,047,726		29,046		360,105		19,101		1,407,831		48,147
Municipal securities		70,028		1,148		—		—		70,028		1,148
Total temporarily impaired available-for-sale securities	$	1,144,947	$	30,546	$	369,213	$	19,993	$	1,514,160	$	50,539
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Obligations of U.S. government sponsored entities and agencies	$	—	$	—	$	9,574	$	426	$	9,574	$	426
Mortgage backed securities		477,925		3,298		316,066		7,408		793,991		10,706
Municipal securities		11,698		66		—		—		11,698		66
Total temporarily impaired available-for-sale securities	$	489,623	$	3,364	$	325,640	$	7,834	$	815,263	$	11,198

At  September 30, 2018, 100% of the mortgage-backed securities held by the Company were issued by U.S. government-sponsored entities and agencies, primarily Fannie Mae, Freddie Mac, and Ginnie Mae, institutions which the government has affirmed its commitment to support. Because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and because the Company does not intend to sell these mortgage-backed securities or more likely than not will not be required to sell these securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at September 30, 2018.

Unrealized losses on municipal securities have not been recognized into income because the issuers bonds are of high quality, and because management does not intend to sell these investments or more likely than not will not be required to sell these investments before their anticipated recovery. The fair value is expected to recover as the securities approach maturity.

Held-to-Maturity

The following reflects the fair value of held-to-maturity securities and the related gross unrecognized gains and losses as of September 30, 2018 and December 31, 2017.

	September 30, 2018
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities	$	87,872	$	—	$	3,627	$	84,245
Municipal securities		131,978		410		5,371		127,017
Total held-to-maturity	$	219,850	$	410	$	8,998	$	211,262
	December 31, 2017
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities	$	100,039	$	—	$	1,068	$	98,971
Municipal securities		132,360		1,781		1,497		132,644
Total held to maturity	$	232,399	$	1,781	$	2,565	$	231,615

Held-to-maturity securities pledged at September 30, 2018 and December 31, 2017 had a carrying amount of $104,650 and $97,389 respectively. These securities were pledged primarily to secure public deposits and repurchase agreements.

At September 30, 2018, there were no holdings of held-to-maturity securities of any one issuer in an amount greater than 10% of stockholders’ equity.

  The fair value and amortized cost of held-to-maturity securities at September 30, 2018 by contractual maturity were as follows. Mortgage-backed securities are not due at a single maturity date and are shown separately.

	Fair		Amortized
Investment securities held-to-maturity	Value		Cost
Due after five years through ten years	$	2,039	$	2,048
Due after ten years through thirty years		124,978		129,930
Mortgage backed securities		84,245		87,872
Total held-to-maturity	$	211,262	$	219,850

The following table shows the Company’s held-to-maturity investments’ gross unrecognized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrecognized loss position, at September 30, 2018 and December 31, 2017.

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrecognized		Fair		Unrecognized		Fair		Unrecognized
	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities	$	22,791	$	924	$	61,454	$	2,703	$	84,245	$	3,627
Municipal securities		57,662		1,558		37,428		3,813		95,090		5,371
Total temporarily impaired held-to-maturity securities	$	80,453	$	2,482	$	98,882	$	6,516	$	179,335	$	8,998
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrecognized		Fair		Unrecognized		Fair		Unrecognized
	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities	$	57,266	$	451	$	41,705	$	617	$	98,971	$	1,068
Municipal securities		13,350		186		37,963		1,311		51,313		1,497
Total temporarily impaired held-to-maturity securities	$	70,616	$	637	$	79,668	$	1,928	$	150,284	$	2,565

At September 30, 2018, 100% of the mortgage-backed securities held by the Company were issued by U.S. government-sponsored entities and agencies, primarily Fannie Mae, Freddie Mac, and Ginnie Mae, institutions which the government has affirmed its commitment to support. Because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and because the Company does not intend to sell these mortgage-backed securities or more likely than not will not be required to sell the securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at September 30, 2018.

Unrealized losses on municipal securities have not been recognized into income because the issuers bonds are of high quality, and because management does not intend to sell these investments or more likely than not will not be required to sell these investments before their anticipated recovery. The fair value is expected to recover as the securities approach maturity.

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Loans

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Loans

NOTE 6: Loans

The following table sets forth information concerning the loan portfolio by collateral types as of the dates indicated.

	September 30, 2018			December 31, 2017
Loans excluding PCI loans
Real estate loans
Residential	$	1,713,093		$	1,025,303
Commercial		4,395,351			2,546,143
Land, development and construction		645,885			235,816
Total real estate		6,754,329			3,807,262
Commercial		1,104,392			693,501
Consumer and other loans		194,603			107,480
Loans before unearned fees and deferred cost		8,053,324			4,608,243
Net unearned fees and costs		2,097			820
Total loans excluding PCI loans		8,055,421			4,609,063
PCI loans (note 1)
Real estate loans
Residential		62,507			59,975
Commercial		92,444			92,791
Land, development and construction		6,955			6,656
Total real estate		161,906			159,422
Commercial		5,479			4,444
Consumer and other loans		286			292
Total PCI loans		167,671			164,158
Total loans		8,223,092			4,773,221
Allowance for loan losses for loans that are not PCI loans		(38,595	)		(32,530	)
Allowance for loan losses for PCI loans		(216	)		(295	)
Total loans, net of allowance for loan losses	$	8,184,281		$	4,740,396

Note 1: Purchased credit impaired (“PCI”) loans are being accounted for pursuant to ASC Topic 310-30.

The table below set forth the activity in the allowance for loan losses for the periods presented.

	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Three months ended September 30, 2018
Balance at beginning of period	$	37,209		$	275		$	37,484
Loans charged-off		(1,178	)		—			(1,178	)
Recoveries of loans previously charged-off		555			—			555
Net charge-offs		(623	)		—			(623	)
Provision for loan losses		2,009			(59	)		1,950
Balance at end of period	$	38,595		$	216		$	38,811
Three months ended September 30, 2017
Balance at beginning of period	$	29,769		$	363		$	30,132
Loans charged-off		(472	)		—			(472	)
Recoveries of loans previously charged-off		1,072			—			1,072
Net recoveries		600			—			600
Provision for loan losses		1,174			(78	)		1,096
Balance at end of period	$	31,543		$	285		$	31,828
	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Nine months ended September 30, 2018
Balance at beginning of period	$	32,530		$	295		$	32,825
Loans charged-off		(2,170	)		—			(2,170	)
Recoveries of loans previously charged-off		1,898			75			1,973
Net (charge-offs) recoveries		(272	)		75			(197	)
Provision for loan losses		6,337			(154	)		6,183
Balance at end of period	$	38,595			216		$	38,811
Nine months ended September 30, 2017
Balance at beginning of period	$	26,569		$	472		$	27,041
Loans charged-off		(1,722	)		—			(1,722	)
Recoveries of loans previously charged-off		2,454			65			2,519
Net recoveries		732			65			797
Provision for loan losses		4,242			(252	)		3,990
Balance at end of period	$	31,543		$	285		$	31,828

The following tables present the activity in the allowance for loan losses by portfolio segment for the periods presented.

	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are not PCI loans:
Three months ended September 30, 2018
Beginning of the period	$	5,847		$	21,921		$	1,629		$	5,412		$	2,400		$	37,209
Charge-offs		(283	)		—			(62	)		(327	)		(506	)		(1,178	)
Recoveries		217			113			2			152			71			555
Provision for loan losses		71			916			21			404			597			2,009
Balance at end of period	$	5,852		$	22,950		$	1,590		$	5,641		$	2,562		$	38,595
Three months ended September 30, 2017
Beginning of the period	$	6,134		$	17,238		$	1,175		$	3,590		$	1,632		$	29,769
Charge-offs		(108	)		(8	)		—			(140	)		(216	)	$	(472	)
Recoveries		290			320			353			82			27		$	1,072
Provision for loan losses		(292	)		1,074			(393	)		458			327		$	1,174
Balance at end of period	$	6,024		$	18,624		$	1,135		$	3,990		$	1,770		$	31,543
	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are PCI loans:
Three months ended September 30, 2018
Beginning of the period	$	—		$	59		$	202		$	—		$	14		$	275
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			—			—			—
Provision for loan losses		—			(59	)		—			—			—			(59	)
Balance at end of period	$	—		$	—		$	202		$	—		$	14		$	216
Three months ended September 30, 2017
Beginning of the period	$	50		$	123		$	176		$	—		$	14		$	363
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			—			—			—
Provision for loan losses		(50	)		(65	)		37			—			—			(78	)
Balance at end of period	$	—		$	58		$	213		$	—		$	14		$	285

	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are not PCI loans:
Nine months ended September 30, 2018
Beginning of the period	$	6,003		$	19,304		$	1,179		$	4,130		$	1,914		$	32,530
Charge-offs		(419	)		—			(62	)		(555	)		(1,134	)		(2,170	)
Recoveries		855			569			3			214			257			1,898
Provision for loan losses		(587	)		3,077			470			1,852			1,525			6,337
Balance at end of period	$	5,852		$	22,950		$	1,590		$	5,641		$	2,562		$	38,595
Nine months ended September 30, 2017
Beginning of the period	$	5,640		$	14,713		$	883		$	3,785		$	1,548		$	26,569
Charge-offs		(250	)		(72	)		—			(677	)		(723	)		(1,722	)
Recoveries		816			626			596			254			162			2,454
Provision for loan losses		(182	)		3,357			(344	)		628			783			4,242
Balance at end of period	$	6,024		$	18,624		$	1,135		$	3,990		$	1,770		$	31,543
	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are PCI loans:
Nine months ended September 30, 2018
Beginning of the period	$	—		$	59		$	222		$	—		$	14		$	295
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			75			—			75
Provision for loan losses		—			(59	)		(20	)		(75	)		—			(154	)
Balance at end of period	$	—		$	—		$	202		$	—		$	14		$	216
Nine months ended September 30, 2017
Beginning of the period	$	54		$	92		$	312		$	—		$	14		$	472
Charge-offs		—			—			—			—			—			—
Recoveries		—			65			—			—			—			65
Provision for loan losses		(54	)		(99	)		(99	)		—			—			(252	)
Balance at end of period	$	—		$	58		$	213		$	—		$	14		$	285

The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 and December 31, 2017. Accrued interest receivable and unearned loan fees and costs are not included in the recorded investment because they are not material.

	Real Estate Loans
As of September 30, 2018	Residential		Commercial		Land, develop., constr.		Comm. & industrial		Consumer & other		Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	417	$	445	$	—	$	546	$	5	$	1,413
Collectively evaluated for impairment		5,435		22,505		1,590		5,095		2,557		37,182
Purchased credit impaired		—		—		202		—		14		216
Total ending allowance balance	$	5,852	$	22,950	$	1,792	$	5,641	$	2,576	$	38,811
Loans:
Individually evaluated for impairment	$	7,055	$	7,686	$	971	$	1,292	$	164	$	17,168
Collectively evaluated for impairment		1,706,038		4,387,665		644,914		1,103,100		194,439		8,036,156
Purchased credit impaired		62,507		92,444		6,955		5,479		286		167,671
Total ending loan balances	$	1,775,600	$	4,487,795	$	652,840	$	1,109,871	$	194,889	$	8,220,995

	Real Estate Loans
As of December 31, 2017		Residential		Commercial		Land, develop., constr.		Comm. & industrial		Consumer & other		Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment		$	586	$	—	$	4	$	206	$	8	$	804
Collectively evaluated for impairment			5,417		19,304		1,175		3,924		1,906		31,726
Purchased credit impaired			—		59		222		—		14		295
Total ending allowance balance		$	6,003	$	19,363	$	1,401	$	4,130	$	1,928	$	32,825
Loans:
Individually evaluated for impairment		$	8,101	$	8,218	$	331	$	3,497	$	198	$	20,345
Collectively evaluated for impairment			1,017,202		2,537,925		235,485		690,004		107,282		4,587,898
Purchased credit impaired			59,975		92,791		6,656		4,444		292		164,158
Total ending loan balance		$	1,085,278	$	2,638,934	$	242,472	$	697,945	$	107,772	$	4,772,401

The table below summarizes impaired loan data for the periods presented.

	Sep. 30, 2018		Dec. 31, 2017
Performing TDRs (these are not included in nonperforming loans ("NPLs"))	$	9,204	$	12,081
Nonperforming TDRs (these are included in NPLs)		1,284		698
Total TDRs (these are included in impaired loans)		10,488		12,779
Impaired loans that are not TDRs		6,680		7,566
Total impaired loans	$	17,168	$	20,345

In certain situations it is common to restructure or modify the terms of troubled loans (i.e. troubled debt restructure or “TDRs”). In those circumstances it may be beneficial to restructure the terms of a loan and work with the borrower for the benefit of both parties, versus forcing the property into foreclosure and having to dispose of it in a distressed sale. When the terms of a loan have been modified, usually the monthly payment and/or interest rate is reduced for generally twelve to twenty-four months. Material principal amounts on any loan modifications have not been forgiven to date.

TDRs as of September 30, 2018 and December 31, 2017 quantified by loan type classified separately as accrual (performing loans) and non-accrual (non performing loans) are presented in the tables below.

As of September 30, 2018	Accruing		Non-Accrual		Total
Real estate loans:
Residential	$	6,525	$	530	$	7,055
Commercial		1,855		687		2,542
Land, development, construction		81		41		122
Total real estate loans		8,461		1,258		9,719
Commercial		605		—		605
Consumer and other		138		26		164
Total TDRs	$	9,204	$	1,284	$	10,488
As of December 31, 2017	Accruing		Non-Accrual		Total
Real estate loans:
Residential	$	7,737	$	364	$	8,101
Commercial		3,286		306		3,592
Land, development, construction		332		—		332
Total real estate loans		11,355		670		12,025
Commercial		556		—		556
Consumer and other		170		28		198
Total TDRs	$	12,081	$	698	$	12,779

Our policy is to return non-accrual TDR loans to accrual status when all the principal and interest amounts contractually due, pursuant to its modified terms, are brought current and future payments are reasonably assured. Our policy also considers the payment history of the borrower, but is not dependent upon a specific number of payments. The Company recorded a provision for loan loss expense of $54 and $82 and partial charge offs of $11 and $32 on the TDR loans described above during the three and nine month periods ending September 30, 2018.  The Company recorded a provision for loan loss expense of $20 and $264 and partial charge-offs of $13 and $55 on TDR loans during the three and nine month periods ending September 30, 2017.

Loans are modified to minimize loan losses when we believe the modification will improve the borrower’s financial condition and ability to repay the loan. We typically do not forgive principal. We generally either reduce interest rates or decrease monthly payments for a temporary period of time and those reductions of cash flows are capitalized into the loan balance. We may also extend maturities, convert balloon loans to longer term amortizing loans, or vice versa, or change interest rates between variable and fixed rate. Each borrower and situation is unique and we try to accommodate the borrower and minimize the Company’s potential losses. Approximately 88% of our TDRs are current pursuant to their modified terms, and $1,284, or approximately 12% of our total TDRs are not performing pursuant to their modified terms. There does not appear to be any significant difference in success rates with one type of concession versus another.

Loans modified as TDRs during the three and nine month periods ending September 30, 2018 were $616 and $1,838.  The Company recorded loan loss provision of $16 and $33 for loans modified during the three and nine month periods ending September 30, 2018.   Loans modified as TDRs during the three and nine month periods ending September 30, 2017 were $85 and $784.  The Company recorded a loan loss provision of $0 and $8 for loans modified during the three and nine month periods ending September 30, 2017.

The following table presents loans by class modified and for which there was a payment default within twelve months following the modification during the periods ending September 30, 2018 and 2017.

	Period ending				Period ending
	September 30, 2018				September 30, 2017
	Number		Recorded		Number		Recorded
	of loans		investment		of loans		investment
Residential		1	$	191		1	$	72
Commercial real estate		1		116		2		616
Land, development, construction		—		—		—		—
Commercial and Industrial		—		—		—		—
Consumer and other		—		—		—		—
Total		2	$	307		3	$	688

The Company recorded a provision for loan loss expense of $18 and $24 and partial charge offs of $5 and $10 on TDR loans that subsequently defaulted as described above during the three and nine month periods ending September 30, 2018.  The Company recorded a provision for loan loss expense of $8 and $24 and partial charge offs of $8 and $24 on TDR loans that subsequently defaulted as described above during the three and nine month period ending September 30, 2017, respectively.

The following tables present loans individually evaluated for impairment by class of loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30. The recorded investment is less than the unpaid principal balance due to partial charge-offs.

As of September 30, 2018	Unpaid principal balance		Recorded investment		Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate	$	4,105	$	3,977	$	—
Commercial real estate		6,634		6,090		—
Land, development, construction		1,009		971		—
Commercial and industrial		427		416		—
Consumer, other		111		111		—
With an allowance recorded:
Residential real estate		3,235		3,078		417
Commercial real estate		1,600		1,596		445
Land, development, construction		—		—		—
Commercial and industrial		880		876		546
Consumer, other		72		53		5
Total	$	18,073	$	17,168	$	1,413

As of December 31, 2017	Unpaid principal balance		Recorded investment		Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate	$	4,945	$	4,818	$	—
Commercial real estate		8,973		8,218		—
Land, development, construction		260		210		—
Commercial and industrial		3,374		2,968		—
Consumer, other		142		127		—
With an allowance recorded:
Residential real estate		3,426		3,283		586
Commercial real estate		—		—		—
Land, development, construction		140		121		4
Commercial and industrial		531		529		206
Consumer, other		78		71		8
Total	$	21,869	$	20,345	$	804

Three months ended September 30, 2018	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,328	$	79	$	—
Commercial		7,674		25		—
Land, development, construction		961		2		—
Total real estate loans		15,963		106		—
Commercial and industrial		1,596		9		—
Consumer and other loans		165		2		—
Total	$	17,724	$	117	$	—
Nine months ended September 30, 2018	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	15,306	$	308	$	—
Commercial		2,586		25		—
Land, development, construction		324		2		—
Total real estate loans		18,216		335		—
Commercial and industrial		538		9		—
Consumer and other loans		56		2		—
Total	$	18,810	$	346	$	—

Three months ended September 30, 2017	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,536	$	70	$	—
Commercial		9,200		35		—
Land, development, construction		343		5		—
Total real estate loans		17,079		110		—
Commercial and industrial		1,859		7		—
Consumer and other loans		262		3		—
Total	$	19,200	$	120	$	—
Nine months ended September 30, 2017	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,767	$	207	$	—
Commercial		8,979		104		—
Land, development, construction		465		13		—
Total real estate loans		17,211		324		—
Commercial and industrial		1,702		22		—
Consumer and other loans		245		8		—
Total	$	19,158	$	354	$	—

Nonperforming loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30.

Nonperforming loans were as follows:	Sep. 30, 2018		Dec. 31, 2017
Non accrual loans	$	23,450	$	17,288
Loans past due over 90 days and still accruing interest		—		—
Total non performing loans	$	23,450	$	17,288

The following table presents the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans:  

As of September 30, 2018	Nonaccrual		Loans past due over 90 days still accruing
Residential real estate	$	9,234	$	—
Commercial real estate		9,108		—
Land, development, construction		2,441		—
Commercial		2,237		—
Consumer, other		430		—
Total	$	23,450	$	—
As of December 31, 2017	Nonaccrual		Loans past due over 90 days still accruing
Residential real estate	$	7,107	$	—
Commercial real estate		6,549		—
Land, development, construction		138		—
Commercial		3,121		—
Consumer, other		373		—
Total	$	17,288	$	—

The following table presents the aging of the recorded investment in past due loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans:  

					Accruing Loans
	Total		30 - 59 days past due		60 - 89 days past due		Greater than 90 days past due		Total Past Due		Loans Not Past Due		Nonaccrual Loans
As of September 30, 2018
Residential real estate	$	1,713,093	$	4,011	$	4,177	$	—	$	8,188	$	1,695,671	$	9,234
Commercial real estate		4,395,351		8,556		5,907		—		14,463		4,371,780		9,108
Land/dev/construction		645,885		796		526		—		1,322		642,122		2,441
Commercial		1,104,392		2,327		970		—		3,297		1,098,858		2,237
Consumer		194,603		929		191		—		1,120		193,053		430
	$	8,053,324	$	16,619	$	11,771	$	—	$	28,390	$	8,001,484	$	23,450
					Accruing Loans
	Total		30 - 59 days past due		60 - 89 days past due		Greater than 90 days past due		Total Past Due		Loans Not Past Due		Nonaccrual Loans
As of December 31, 2017
Residential real estate	$	1,025,303	$	3,568	$	1,821	$	—	$	5,389	$	1,012,807	$	7,107
Commercial real estate		2,546,143		1,158		2,272		—		3,430		2,536,164		6,549
Land/dev/construction		235,816		2,807		189		—		2,996		232,682		138
Commercial		693,501		568		763		—		1,331		689,049		3,121
Consumer		107,480		471		48		—		519		106,588		373
	$	4,608,243	$	8,572	$	5,093	$	—	$	13,665	$	4,577,290	$	17,288

Credit Quality Indicators:

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis is performed on at least an annual basis. The Company uses the following definitions for risk ratings:

Special Mention: Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date.

Substandard: Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.

Doubtful: Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.

Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans.  The following table presents the risk category of loans by class of loans based on the most recent analysis performed, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30, as of September 30, 2018 and December 31, 2017.   The increase in loans categorized as special mention and substandard between the periods presented is due to the acquisitions of Sunshine and Harbor on January 1, 2018 and Charter on September 1, 2018.  

			As of September 30, 2018
Loan Category	Pass		Special Mention		Substandard		Doubtful
Residential real estate	$	1,639,770	$	46,373	$	26,950	$	—
Commercial real estate		4,181,026		167,606		46,719		—
Land/dev/construction		604,023		36,933		4,929		—
Commercial		1,076,627		23,896		3,869		—
Consumer		193,671		263		669		—
Total	$	7,695,117	$	275,071	$	83,136	$	—
			As of December 31, 2017
Loan Category	Pass		Special Mention		Substandard		Doubtful
Residential real estate	$	987,472	$	20,435	$	17,396	$	—
Commercial real estate		2,411,085		115,942		19,116		—
Land/dev/construction		217,555		17,699		562		—
Commercial		674,764		14,186		4,551		—
Consumer		106,735		139		606		—
Total	$	4,397,611	$	168,401	$	42,231	$	—

The Company considers the performance of the loan portfolio and its impact on the allowance for loan losses. For residential and consumer loan classes, the Company also evaluates credit quality based on the aging status of the loan, which was previously presented, and by payment activity. The following table presents the recorded investment in residential and consumer loans, excluding purchased credit impaired loans, based on payment activity as of September 30, 2018 and December 31, 2017:

As of September 30, 2018	Residential		Consumer
Performing	$	1,703,859	$	194,173
Nonperforming		9,234		430
Total	$	1,713,093	$	194,603
As of December 31, 2017	Residential		Consumer
Performing	$	1,018,196	$	107,107
Nonperforming		7,107		373
Total	$	1,025,303	$	107,480

Purchased Credit Impaired (“PCI”) loans:

Income is recognized on PCI loans pursuant to ASC Topic 310-30. A portion of the fair value discount has been ascribed as an accretable yield that is accreted into interest income over the estimated remaining life of the loans. The remaining non-accretable difference represents cash flows not expected to be collected.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans as of September 30, 2018 and December 31, 2017. Contractually required principal and interest payments have been adjusted for estimated prepayments.

	Sep. 30, 2018			Dec. 31, 2017
Contractually required principal and interest	$	294,278		$	248,283
Non-accretable difference		(59,433	)		(13,183	)
Cash flows expected to be collected		234,845			235,100
Accretable yield		(67,174	)		(70,942	)
Carrying value of acquired loans		167,671			164,158
Allowance for loan losses		(216	)		(295	)
Carrying value less allowance for loan losses	$	167,455		$	163,863

The Company adjusted its estimates of future expected losses, cash flows and renewal assumptions during the current quarter. These adjustments resulted in an increase in expected cash flows and accretable yield, and a decrease in the non-accretable difference. The Company reclassified $4,529, $2,286, $8,443 and $8,364 from non-accretable difference to accretable yield during the three and nine month periods ending September 30, 2018 and 2017 to reflect its adjusted estimates of future expected cash flows.   The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three and nine month periods ending September 30, 2018 and 2017.   

Activity during the				Effect of			income		all other
three month period ending September 30, 2018	Jun. 30, 2018			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	285,576		$	33,687		$	—	$	(24,985	)	$	294,278
Non-accretable difference		(44,166	)		(20,763	)		—		5,496			(59,433	)
Cash flows expected to be collected		241,410			12,924			—		(19,489	)		234,845
Accretable yield		(67,460	)		(1,492	)		7,682		(5,904	)		(67,174	)
Carry value of acquired loans	$	173,950		$	11,432		$	7,682	$	(25,393	)	$	167,671
Activity during the				Effect of			income		all other
nine month period ending September 30, 2018	Dec. 31, 2017			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	248,283		$	122,392		$	—	$	(76,397	)	$	294,278
Non-accretable difference		(13,183	)		(58,927	)		—		12,677			(59,433	)
Cash flows expected to be collected		235,100			63,465			—		(63,720	)		234,845
Accretable yield		(70,942	)		(7,770	)		26,496		(14,958	)		(67,174	)
Carry value of acquired loans	$	164,158		$	55,695		$	26,496	$	(78,678	)	$	167,671
Activity during the				Effect of			income		all other
three month period ending September 30, 2017	Jun. 30, 2017			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	280,114		$	—		$	—	$	(21,776	)	$	258,338
Non-accretable difference		(14,047	)		—			—		1,148			(12,899	)
Cash flows expected to be collected		266,067			—			—		(20,628	)		245,439
Accretable yield		(86,703	)		—			7,696		(2,457	)		(81,464	)
Carry value of acquired loans	$	179,364		$	—		$	7,696	$	(23,085	)	$	163,975
Activity during the				Effect of			income		all other
nine month period ending September 30, 2017	Dec. 31, 2016			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	297,821		$	20,729		$	—	$	(60,212	)	$	258,338
Non-accretable difference		(18,372	)		(6,347	)		—		11,820			(12,899	)
Cash flows expected to be collected		279,449			14,382			—		(48,392	)		245,439
Accretable yield		(93,525	)		(3,266	)		24,780		(9,453	)		(81,464	)
Carry value of acquired loans	$	185,924		$	11,116		$	24,780	$	(57,845	)	$	163,975

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Loans Held for Sale

9 Months Ended

Sep. 30, 2018

Loans Receivable Held For Sale Net [Abstract]

Loans Held for Sale

NOTE 7:  Loans Held for Sale

For periods prior to December 31, 2017, mortgage loans held for sale were valued at the lower of cost or fair value.  Effective January 1, 2018, the Company elected to account for these loans under the fair value option with changes in fair value recognized in current period earnings.  At the date of funding of the loan, the funded amount of the loan, the relative derivative asset or liability of the associated interest rate lock commitment, less direct costs, becomes the initial recorded investment in the loan held for sale.  Such amount approximates the fair value of the loan.  This change was accounted for on a prospective basis.  Net gains from changes in estimated fair value of mortgage loans held for sale were $723 at September 30, 2018. No loans held for sale at September 30, 2018 were past due or on nonaccrual.   

The table below summarizes the activity in mortgage loans held for sale during the three month periods ending September 30, 2018 and 2017.

	Three month periods ended						Nine month periods ended
	Sep. 30, 2018			Sep. 30, 2017			Sep. 30, 2018			Sep. 30, 2017
Beginning balance	$	36,366		$	8,959		$	19,647		$	2,285
Effect from acquisitions		2,835			—			8,959			—
Loans originated		91,910			23,444			242,226			53,806
Proceeds from sales		(94,226	)		(20,564	)		(238,613	)		(44,780	)
Change in fair value		1			—			723			—
Net realized gain on sales		2,668		404				6,612			932
Ending balance	$	39,554		$	12,243		$	39,554		$	12,243

As loans are closed, they are typically sold at prices specified in the forward contracts.  Gains or losses may arise if the yields of the loans delivered vary from those specified in the forward contracts.  Derivative mortgage loan commitments, or interest rate locks, are also utilized and relate to the origination of a mortgage that will be held for sale upon funding.   The Company uses these derivative financial instruments on its loans held for sale to manage interest rate risk and not for speculative purposes.   The table below summarizes the notional amounts for interest rate lock commitments, best efforts forward trades and MBS forward trades pertaining to loans held for sale at September 30, 2018.

	Notional
Interest rate lock commitments	$	75,811
Best efforts forward trades		66,425
MBS forward trades		27,000
Total derivative instruments	$	169,236

Mortgage banking derivatives used in the ordinary course of business consist of forward sales contracts and interest rate lock commitments on residential mortgage loans.  Forward sales contracts represent future commitments to deliver loans at a specified price and by a specified date and are used to manage interest rate risk on loan commitments and mortgage loans held for sale.  Rate lock commitments represent commitments to fund loans at a specific rate and by a specified expiration date.  These derivatives involve underlying items, such as interest rates, and are designed to mitigate risk. Notional amounts are amounts on which calculations and payments are based, but which do not represent credit exposure, as credit exposure is limited to the amounts required to be received or paid.

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Securities Sold Under Agreement to Repurchase

9 Months Ended

Sep. 30, 2018

Banking And Thrift [Abstract]

Securities Sold Under Agreement to Repurchase

NOTE 8: Securities sold under agreement to repurchase

Our Bank enters into borrowing arrangements with our retail business customers by agreements to repurchase (“securities sold under agreements to repurchase”) under which the bank pledges investment securities owned and under its control as collateral against these one-day borrowing arrangement. These short-term borrowings totaled $51,311 at September 30, 2018 compared to $52,080 at December 31, 2017.  The following table provides additional details for the periods presented.

	MBS			Municipal
As of September 30, 2018	Securities			Securities			Total
Market value of securities pledged	$	66,849		$	434		$	67,283
Borrowings related to pledged amounts		51,195		116				51,311
Market value pledged as a % of borrowings		131	%		374	%		131	%
As of December 31, 2017
Market value of securities pledged	$	59,239		$	443		$	59,682
Borrowings related to pledged amounts		52,030		50				52,080
Market value pledged as a % of borrowings		114	%		886	%		115	%

Any risk related to these arrangements, primarily market value changes, are minimized due to the overnight (one day) maturity and the additional collateral pledged over the borrowed amounts.

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Business Combinations

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Business Combinations

NOTE 9: Business Combinations  

 Acquisition of Platinum Bank Holding Company

On April 1, 2017, the Company completed its acquisition of Platinum whereby Platinum merged with and into the Company. Pursuant to and simultaneously with the merger of Platinum with and into the Company, Platinum’s wholly owned subsidiary bank, Platinum Bank, merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to further solidify its market share in the Central Florida markets and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale. The acquisition increased the Company’s total assets and total deposits by approximately 14% and 13%, respectively, as compared with the balances at December 31, 2016, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018 and 2017, respectively, the Company incurred approximately $0, $0, $0 and $3,927 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Condensed Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $73,829 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date.

The Company acquired 100% of the outstanding common stock of Platinum. The purchase price consisted of both cash and stock. Each share of Platinum common stock was exchanged for $7.60 cash and 3.7832 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on March 31, 2017, the resulting purchase price was $119,431.

The table below summarizes the purchase price calculation.

Number of shares of Platinum common stock outstanding at March 31, 2017		1,131,134
Per share exchange ratio	3.7832
Number of shares of CenterState common stock less 51 of fractional shares		4,279,255
Multiplied by CenterState common stock price per share on March 31, 2017	$	25.90
Fair value of CenterState common stock issued	$	110,833
Total Platinum common shares		1,131,134
Multiplied by the cash consideration each Platinum share is entitled to receive	$	7.60
Total cash consideration, not including cash for fractional shares	$	8,597
Total stock consideration	$	110,833
Total cash consideration plus $1 for 51 of fractional shares	$	8,598
Total purchase price	$	119,431

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the April 1, 2017 purchase date.

	April 1, 2017
Assets:
Cash and cash equivalents	$	106,537
Loans, held for investment		442,366
Purchased credit impaired loans		12,218
Investments		28,873
Accrued interest receivable		1,216
Branch real estate		9,600
Furniture and fixtures		402
Bank property held for sale		4,382
FHLB stock		2,220
Other repossessed real estate owned		272
Core deposit intangible		3,992
Goodwill		73,829
Deferred tax asset		227
Other assets		29
Total assets acquired	$	686,163
Liabilities:
Deposits	$	520,423
Federal Home Loan Bank advances		40,546
Securities sold under agreement to repurchase		5,569
Accrued interest payable		94
Other liabilities		100
Total liabilities assumed	$	566,732

In the acquisition, the Company acquired $454,584 of loans at fair value, net of $8,980, or 1.9%, estimated discount to the outstanding principal balance, representing 13.3% of the Company’s total loans at December 31, 2016. Of the total loans acquired, management identified $12,218 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of April 1, 2017 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	18,811
Non-accretable difference		(4,639	)
Cash flows expected to be collected		14,172
Accretable yield		(1,954	)
Total purchased credit-impaired loans acquired	$	12,218

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	37,206	$	37,419
Commercial real estate		262,612		259,727
Construction/development/land		47,675		46,618
Commercial loans		96,587		95,701
Consumer and other loans		2,954		2,901
Purchased credit-impaired		16,530		12,218
Total earning assets	$	463,564	$	454,584

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $3,992, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of Gateway Financial Holdings of Florida, Inc.

On May 1, 2017, the Company completed its acquisition of Gateway whereby Gateway merged with and into the Company.  Pursuant to and simultaneously with the merger of Gateway with and into the Company, Gateway’s three subsidiary banks, Gateway Bank of Florida, Gateway Bank of Central Florida and Gateway Bank of Southwest Florida, merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to expand its market share in the Central Florida market, together with its acquisition of Platinum as described above, and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale. The acquisition increased the Company’s total assets and total deposits by approximately 19% and 17%, respectively, as compared with the balances at December 31, 2016, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018 and 2017, respectively, the Company incurred approximately $0, $0, $149 and $6,401 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Condensed Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $77,826 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date.

The Company acquired 100% of the outstanding common stock of Gateway. The purchase price consisted of both cash and stock. Each share of Gateway common stock was either exchanged for $18.00 cash or 0.95 shares of the Company’s common stock. In addition, the Company assumed Gateway’s stock options, which were converted to the Company’s stock options.  Based on the closing price of the Company’s common stock on April 30, 2017, the resulting purchase price was $157,372.  

The table below summarizes the purchase price calculation.

Number of shares of Gateway common stock outstanding at April 30, 2017		5,463,764
Gateway preferred shares that converted to Gateway common shares upon a change in control		919,236
Total Gateway common shares including conversion of preferred shares		6,383,000
Number of shares of Gateway common shares exchanged for CenterState common stock		4,468,100
Per share exchange ratio	0.95
Number of shares of CenterState common stock less 254 of fractional shares		4,244,441
Multiplied by CenterState common stock price per share on April 30, 2017	$	25.23
Fair value of CenterState common stock issued	$	107,087
Number of shares of Gateway common shares exchanged for cash		1,914,900
Multiplied by the cash consideration each Gateway share is entitled to receive	$	18.00
Total cash consideration, not including cash for fractional shares	$	34,468
Total stock consideration	$	107,087
Total cash consideration plus $6 for 254 of fractional shares	$	34,474
Total consideration paid to Gateway common shareholders	$	141,561
Fair value of Gateway stock options converted to CenterState stock options	$	15,811
Total purchase price	$	157,372

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the May 1, 2017 purchase date.

	May 1, 2017
Assets:
Cash and cash equivalents	$	23,065
Loans, held for investment		560,413
Purchased credit impaired loans		7,827
Investments		231,951
Accrued interest receivable		2,422
Branch real estate		18,160
Furniture and fixtures		702
Bank property held for sale		1,087
Federal Reserve Bank and Federal Home Loan Bank stock		4,640
Other repossessed real estate owned		134
Bank owned life insurance		15,475
Servicing asset		271
Core deposit intangible		8,432
Goodwill		77,826
Deferred tax asset		7,246
Other assets		1,217
Total assets acquired	$	960,868
Liabilities:
Deposits	$	708,209
Federal Home Loan Bank advances		90,598
Federal funds purchased		3,588
Accrued interest payable		304
Other liabilities		797
Total liabilities assumed	$	803,496

In the acquisition, the Company acquired $568,240 of loans at fair value, net of $9,479, or 1.6%, estimated discount to the outstanding principal balance, representing 16.6% of the Company’s total loans at December 31, 2016. Of the total loans acquired, management identified $7,827 with credit deficiencies.  All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.  

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of May 1, 2017 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	12,523
Non-accretable difference		(2,465	)
Cash flows expected to be collected		10,058
Accretable yield		(2,231	)
Total purchased credit-impaired loans acquired	$	7,827

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	142,881	$	142,468
Commercial real estate		321,262		317,578
Construction/development/land		47,727		46,489
Commercial loans		46,953		46,274
Consumer and other loans		7,803		7,604
Purchased credit-impaired		11,093		7,827
Total earning assets	$	577,719	$	568,240

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $8,432, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of Sunshine Bancorp, Inc.

On January 1, 2018, the Company completed its acquisition of Sunshine Bancorp, Inc. (“Sunshine”) whereby Sunshine merged with and into the Company. Pursuant to and simultaneously with the merger of Sunshine with and into the Company, Sunshine’s wholly owned subsidiary bank, Sunshine Bank merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to further solidify its market share in the Florida market and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale.  The acquisition increased the Company’s total assets and total deposits by approximately 14% and 13%, respectively, as compared with the balances at December 31, 2017, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018, the Company incurred approximately $0 and $10,474 of acquisition costs related to this transaction. A portion of these merger expenses reduced goodwill by $4,114, net of income taxes of $1,397. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Condensed Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $114,228 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date. Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available.  Fair value estimates on loans are deemed preliminary due to appraisals and other borrower financial information.  

The Company acquired 100% of the outstanding common stock of Sunshine. The purchase price consisted of stock plus cash in lieu of fractional shares. Each share of Sunshine common stock was exchanged for 0.89 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on December 29, 2017, the resulting purchase price was $187,852.  

The table below summarizes the purchase price calculation.

Number of shares of Sunshine common stock outstanding at December 31, 2017		7,922,479
Per share exchange ratio	0.89
Number of shares of CenterState common stock less 361 of fractional shares		7,050,645
CenterState common stock price per share on December 29, 2017	$	25.73
Fair value of CenterState common stock issued	$	181,413
Cash consideration paid for 361 of fractional shares		7
Total consideration to be paid to Sunshine common shareholders	$	181,420
Fair value of Sunshine stock options converted to CenterState stock options		6,432
Total Purchase Price for Sunshine	$	187,852

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the January 1, 2018 purchase date.

	January 1, 2018
Assets:
Cash and cash equivalents	$	47,056
Loans, held for investment		676,090
Purchased credit impaired loans		8,232
Loans held for sale		430
Investments		93,006
Accrued interest receivable		2,170
Branch real estate		9,375
Furniture and fixtures		916
Bank property held for sale		9,503
FHLB stock		4,875
Bank owned life insurance		23,101
Core deposit intangible		8,525
Goodwill		114,228
Deferred tax asset		11,670
Other assets		6,135
Total assets acquired	$	1,015,312
Liabilities:
Deposits	$	719,039
Federal Home Loan Bank advances		95,001
Securities sold under agreement to repurchase		353
Subordinated notes		11,000
Accrued interest payable		457
Other liabilities		1,610
Total liabilities assumed	$	827,460

In the acquisition, the Company acquired $684,322 of loans at fair value, net of $22,657, or 3.2%, estimated discount to the outstanding principal balance, representing 14.3% of the Company’s total loans at December 31, 2017. Of the total loans acquired, management identified $8,232 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of January 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	21,598
Non-accretable difference		(12,213	)
Cash flows expected to be collected		9,385
Accretable yield		(1,153	)
Total purchased credit-impaired loans acquired	$	8,232

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	148,342	$	146,057
Commercial real estate		375,377		371,323
Construction/development/land		58,530		57,331
Commercial loans		104,811		99,650
Consumer and other loans		1,770		1,729
Purchased credit-impaired		18,149		8,232
Total earning assets	$	706,979	$	684,322

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $8,525, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of HCBF Holding Company, Inc.

On January 1, 2018, the Company completed its acquisition of HCBF Holding Company, Inc. (“Harbor”) whereby Harbor merged with and into the Company. Pursuant to and simultaneously with the merger of Harbor with and into the Company, Harbor’s wholly owned subsidiary bank, Harbor Bank merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to further solidify its market share in the Florida market and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale.  The acquisition increased the Company’s total assets and total deposits by approximately 33% and 32%, respectively, as compared with the balances at December 31, 2017, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018 and 2017, the Company incurred approximately $0 and $11,527 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $233,321 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date. Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available.   Fair value estimates on loans are deemed preliminary due to appraisals and other borrower financial information.  

The Company acquired 100% of the outstanding common stock of Harbor. The purchase price consisted of both cash and stock. Each share of Harbor common stock was exchanged for $1.925 cash and 0.675 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on December 29, 2017, the resulting purchase price was $448,236.  

The table below summarizes the purchase price calculation.

Number of shares of Harbor common stock outstanding at December 31, 2017		22,299,082
Per share exchange ratio		0.675
Number of shares of CenterState common stock less 241 of fractional shares		15,051,639
CenterState common stock price per share on December 29, 2017	$	25.73
Fair value of CenterState common stock issued	$	387,279
Number of shares of Harbor common stock outstanding at December 31, 2017		22,299,082
Cash consideration each Harbor share is entitled to receive	$	1.925
Total Cash Consideration plus $6 for 241 of fractional shares	$	42,932
Total Stock Consideration	$	387,279
Total Cash Consideration		42,932
Total consideration to be paid to Harbor common shareholders	$	430,211
Fair value of Harbor stock options converted to CenterState stock options	$	18,025
Total Purchase Price for Harbor	$	448,236

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the January 1, 2018 purchase date.

	January 1, 2018
Assets:
Cash and cash equivalents	$	77,176
Loans, held for investment		1,290,004
Purchased credit impaired loans		36,031
Loans held for sale		5,694
Investments		585,297
Accrued interest receivable		5,847
Branch real estate		34,035
Furniture and fixtures		3,571
Bank property held for sale		14,140
FHLB and other stock		9,488
Bank owned life insurance		39,089
Other real estate owned		5,144
Core deposit intangible		23,625
Goodwill		233,321
Deferred tax asset		14,071
Other assets		2,536
Total assets acquired	$	2,379,069
Liabilities:
Deposits	$	1,755,155
Federal Home Loan Bank advances		157,919
Corporate debentures		5,872
Accrued interest payable		478
Other liabilities		11,409
Total liabilities assumed	$	1,930,833

In the acquisition, the Company acquired $1,326,035 of loans at fair value, net of $40,438, or 3.0%, estimated discount to the outstanding principal balance, representing 27.8% of the Company’s total loans at December 31, 2017. Of the total loans acquired, management identified $36,031 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and other substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of January 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	67,107
Non-accretable difference		(25,951	)
Cash flows expected to be collected		41,156
Accretable yield		(5,125	)
Total purchased credit-impaired loans acquired	$	36,031

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	370,611	$	363,559
Commercial real estate		636,517		627,900
Construction/development/land		149,547		146,639
Commercial loans		113,818		110,630
Consumer and other loans		41,660		41,276
Purchased credit-impaired		54,320		36,031
Total earning assets	$	1,366,473	$	1,326,035

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $23,625, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Acquisition of Charter Financial Corporation

On September 1, 2018, the Company completed its acquisition of Charter Financial Corporation (“Charter”) whereby Charter merged with and into the Company. Pursuant to and simultaneously with the merger of Charter with and into the Company, Charter’s wholly owned subsidiary bank, CharterBank, merged with and into the Company’s subsidiary bank, CenterState Bank, N.A.

The Company’s primary reasons for the transaction were to expand its franchise into Georgia and Alabama, further solidify its market share in the Florida market and expand its customer base to enhance deposit fee income and leverage operating cost through economies of scale.  The acquisition increased the Company’s total assets and total deposits by approximately 24% as compared with the balances at December 31, 2017, and is expected to positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities.  During the three and nine month periods ending September 30, 2018, the Company incurred approximately $10,395 and $10,630 of acquisition costs related to this transaction. These acquisition costs are reported in merger and acquisition related expenses on the Company’s Consolidated Statements of Income and Comprehensive Income.

The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company recognized goodwill on this acquisition of $197,648 which is nondeductible for tax purposes as this acquisition is a nontaxable transaction. The goodwill is calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date. Fair value estimates are based on the information available, and are subject to change for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available.   Fair value estimates on loans are deemed preliminary due to appraisals, other borrower financial information, and pending final reports from loan valuation specialists.  

The Company acquired 100% of the outstanding common stock of Charter. The purchase price consisted of both cash and stock. Each share of Charter common stock was exchanged for $2.30 cash and 0.738 shares of the Company’s common stock. Based on the closing price of the Company’s common stock on August 31, 2018, the resulting purchase price was $389,476.  

The table below summarizes the purchase price calculation.

Number of shares of Charter common stock outstanding at August 31, 2018		15,480,776
Per share exchange ratio		0.738
Number of shares of CenterState common stock less 599 of fractional shares		11,424,214
CenterState common stock price per share on August 31, 2018	$	30.62
Fair value of CenterState common stock issued	$	349,809
Number of shares of Charter common stock outstanding at August 31, 2018		15,480,776
Cash consideration each Charter share is entitled to receive	$	2.300
Total Cash Consideration plus $17 for 599 of fractional shares	$	35,624
Total Stock Consideration	$	349,809
Total Cash Consideration		35,624
Total consideration to be paid to Charter common shareholders	$	385,433
Cash out of Charter stock options		4,043
Total Purchase Price for Charter	$	389,476

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the September 1, 2018 purchase date.

	September 1, 2018
Assets:
Cash and cash equivalents	$	184,020
Loans, held for investment		1,130,240
Purchased credit impaired loans		11,432
Loans held for sale		2,835
Investments		73,808
Accrued interest receivable		3,684
Branch real estate		27,930
Furniture and fixtures		1,988
Bank property held for sale		1,695
FHLB and other stock		1,483
Bank owned life insurance		54,813
Other real estate owned		257
Core deposit intangible		19,795
Goodwill		197,648
Deferred tax asset		1,966
Other assets		20,947
Total assets acquired	$	1,734,541
Liabilities:
Deposits	$	1,321,970
Corporate debentures		9,000
Accrued interest payable		1,015
Other liabilities		13,080
Total liabilities assumed	$	1,345,065

In the acquisition, the Company acquired $1,141,672 of loans at fair value, net of $23,118, or 2.0%, estimated discount to the outstanding principal balance, representing 23.9% of the Company’s total loans at December 31, 2017. Of the total loans acquired, management identified $11,432 with credit deficiencies. All loans that were on non-accrual status, impaired loans including TDRs and some substandard loans were considered by management to be credit impaired and are accounted for pursuant to ASC Topic 310-30.

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of September 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	33,687
Non-accretable difference		(20,763	)
Cash flows expected to be collected		12,924
Accretable yield		(1,492	)
Total purchased credit-impaired loans acquired	$	11,432

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	284,505	$	280,200
Commercial real estate		567,506		557,730
Construction/development/land		181,128		178,687
Commercial loans		88,308		87,062
Consumer and other loans		26,221		26,561
Purchased credit-impaired		17,122		11,432
Total earning assets	$	1,164,790	$	1,141,672

In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $19,795, which will be amortized utilizing an accelerated amortization method over an estimated economic life not to exceed ten years. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships.

Pro-forma information

Pro-forma data for the three month period ending September 30, 2017 listed in the table below presents pro-forma information as if the Gateway, Sunshine, Harbor and Charter acquisitions occurred at the beginning of 2017.  Pro-forma data for the nine month period ending September 30, 2017 listed in the table below presents pro-forma information as if the Platinum, Gateway, Sunshine, Harbor and Charter acquisitions occurred at the beginning of 2017.  Pro-forma data for the three and nine month periods ending September 30, 2018 listed in the table below presents pro-forma information as if the Charter acquisition occurred at the beginning of 2017.  

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Net interest income	$	112,182	$	109,779	$	339,786	$	315,211
Net income available to common shareholders	$	51,250	$	32,011	$	131,102	$	89,823
EPS - basic	$	0.54	$	0.34	$	1.38	$	0.96
EPS - diluted	$	0.53	$	0.33	$	1.36	$	0.94

The disclosures regarding the results of operations for Platinum, Gateway, Sunshine, Harbor and Charter subsequent to their respective acquisition dates are omitted as this information is not practical to obtain.  The Company converted Platinum, Gateway and Sunshine’s core systems in the same quarter as their respective acquisition date.  Although the Company did not convert Harbor’s core

system in the first quarter of 2018 or Charter’s core system in the third quarter of 2018, the majority of the fixed costs and purchase accounting entries were booked on the Company’s core system making it impractical to determine Harbor or Charter’s results of operation on a stand-alone basis.

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Interest Rate Swap Derivatives

9 Months Ended

Sep. 30, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Interest Rate Swap Derivatives

NOTE 10:  Interest Rate Swap Derivatives

The Company enters into interest rate swaps in order to provide commercial loan clients the ability to swap from fixed to variable interest rates.  Under these agreements, the Company enters into a fixed-rate loan with a client in addition to a swap agreement.  This swap agreement effectively converts the client’s fixed rate loan into a variable rate.  The Company then enters into a matching swap agreement with a third party dealer in order to offset its exposure on the customer swap.  At September 30, 2018 and December 31, 2017, the notional amount of such arrangements was $5,044,615 and $3,740,430, respectively, and investment securities with a fair value of $0 and $19,048 were pledged as collateral to the third party dealers.  The Company pledged $5,236 and $16,991 of cash as collateral to the third party dealers at September 30, 2018 and December 31, 2017, respectively, in addition to the investment securities pledged.  As the interest rate swaps with the clients and third parties are not designated as hedges under ASC 815, changes in market values are reported in earnings.

Summary information about the interest rate swap derivative instruments is as follows:

	Sep. 30, 2018			Dec. 31, 2017
Notional amount	$	5,044,615		$	3,740,430
Weighted average pay rate on interest-rate swaps		3.49	%		3.00	%
Weighted average receive rate on interest rate swaps		3.48	%		3.00	%
Weighted average maturity (years)		11			11
Fair value of interest rate swap derivatives (asset)	$	87,946		$	42,480
Fair value of interest rate swap derivatives (liability)	$	88,065		$	43,259

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Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2018

Revenue From Contract With Customer [Abstract]

Revenue from Contracts with Customers

NOTE 11:  Revenue from Contracts with Customers

On January 1, 2018, the Company adopted 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). ASU 2014-09 implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

The Company concluded that there is no change to the timing and pattern of revenue recognition for its current revenue streams in scope of Topic 606 or the presentation of revenue as gross versus net. No adjustment to retained earnings was required on the adoption date.  Because there is no change to the timing and pattern of revenue recognition, there are no material changes to the Company’s processes and internal controls.  Expanded disclosures including disaggregation of revenues and descriptions of performance obligations required by ASU 2014-09 are included below. The Company adopted ASU 2014-09 in the first quarter of 2018, and management determined during the assessment of the Company’s revenue streams that the adoption of ASU 2014-09 did not impact the Consolidated Financial Statements of the Company.  

There are two reasons ASU 2014-09 did not have an impact to the Company.  First, the majority of revenues are interest earned and gain on sales of loans, investment securities and other financial instruments, all of which are unaffected as they are outside the scope of ASU 2014-09.  Secondly, the Company’s non-interest income revenue streams such as service charges on deposits, treasury management fees, wealth advisory fees, fixed income sales, and correspondent bank fees, are all within the scope of ASU 2014-09.  However, ASC Topic 606 focuses on revenues from contracts earned over time, but all of these in-scope noninterest income revenue streams are governed by agreements that do not have an enforceable, contractual term.  Given the cancellable-at-will structure, ASC Topic 606 views these contracts as agreements-at-will without a defined term, the revenues of which are immediately recognized.  The revenue recognition timing is identical compared to previous revenue recognition standards.  

All of the Company’s revenue from contracts with customers in the scope of ASC 606 is recognized within Non-Interest Income.  ASU 2014-09 requires disclosure of sufficient information to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.  A description of the Company’s revenue streams accounted for under ASC 606 as well as an explanation of why they are not impacted are as follows:  

Revenues by Operating Segment/Line of Business

Service Charges on Deposit Accounts

The Company earns fees from its deposit customers for transaction-based, account maintenance, and overdraft services.  Transaction-based fees, which include but are not limited to: services such as ATM use fees, stop payment charges, statement rendering, ACH fees, are recognized at the time the transaction is executed as that is the point in time the Company fulfills the customer’s request.  Maintenance fees, which relate primarily to monthly maintenance, are earned over the course of a month, representing the period over which the Company satisfies the performance obligation.  Overdraft fees are recognized at the point in time that the overdraft occurs.  Service charges on deposits are withdrawn from the customer’s account balance.

Treasury Management

The Company earns fees for Treasury Management products and services which include but are not limited to online cash management, remote deposit capture, positive pay, and lockboxes.  Similar to the above service charges on deposit accounts above, these fees are also recognized at either the time the transaction or at the end of the month in the case where service obligations are provided over the course of each month.  Even though a customer’s Treasury Management agreement may provide for services over an indefinite period of time, the customer is free to end the agreement at will without penalty.  This structure is viewed as an at-will agreement under ASC 606, the revenues of which are recognized immediately.  

Wealth Management &Advisory

The Company has contracted with a third party to provide wealth management and investment brokerage services on behalf of the Company.  All fees earned by the Company from Wealth Management and Advisory activities are in the form of a revenue sharing agreement.  The Company acts as agent in this agreement, and as such, ASC 606 deems the third party to be the customer of the Company as opposed to those individual and entities receiving the wealth advisory services.  The agreed-upon portion of revenues generated by the third party for services provided other entities and individuals are owed and remitted to the Company at the end of each month, at which time all performance obligations of the Company are fulfilled.  

Correspondent Banking

The company earns revenues from a variety of services to other financial institutions including but not limited to correspondent banking, cash and clearing, safekeeping, wire transfers, international services, bond accounting, and others.  Fixed income sales are discussed separately.  While there is a significant variety of a la carte services, all (except fixed income sales) are either billed as incurred or are subject to monthly billing, at which point the performance obligation have been fulfilled.  Even though a Correspondent agreement may provide for services over an indefinite period of time, the customer is free to end the agreement at will without penalty.  This structure is viewed as an at-will agreement under ASC 606, the revenues of which are recognized immediately.  

Fixed Income Sales

The company earns commission revenues from the sale of fixed income securities to institutional investors.  These revenues are earned and collected at each individual sale, and the sale is the sole performance obligation.  There are no minimum orders or future performance obligations or deferred recognition requirements.  

Trust

The Company sold its Trust Department in December 2017.  While there would have been ASC Topic 606 revenue recognition timing implications, the sale prior to December 31, 2017 removed these revenues from consideration.  Trust revenues are displayed for prior periods only.  

Prepaid Cards

The Company earns revenues from prepaid card interchange fees and maintenance fees. Interchange fees from cardholder transactions represent a portion of the underlying transaction value and are recognized daily, concurrently with the transaction processing services to the cardholder.  Similar to fees from deposits accounts, maintenance fees are earned over the performance obligation period, after which all obligations have been fulfilled.  

Credit Cards

The Company earns revenues from a revenue sharing agreement with a third party who provides credit card services for Company customers.  Similar to the Wealth Management and Advisory revenue sharing agreement discussed above, the Company is the agent and the third party is the customer.  The revenue sharing agreement calculates fees owed to the Company based on

interchange and application amounts and levels.  These share of fees are remitted to the Company each month, at which time the performance obligation is fulfilled.  

Debit Card Interchange Income

The Company earns interchange fees from debit cardholder transactions through the MasterCard payment network.  Interchange fees form cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder. 

Gains/Losses on Sales of OREO

The Company records a gain or loss form the sale of OREO when control of the property transfers to the buyer, which generally occurs at the time of an executed deed.  There are no ASC 606 implications unless the Company finances the sale of OREO.  There are no instances of the Company financing the sale of one of its OREO properties as of September 30, 2018.  

Contract Balances

The Contract Balances disclosure requirement is not relevant, as no revenues are earned over time that would require the monitoring of contract balances.  The Performance Obligations disclosure requirements call for a description of when performance obligations are satisfied, significant payment terms, nature of goods or services promised, and obligations for returns, refunds, and warranties.  

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Recently Issued Accounting Standards

9 Months Ended

Sep. 30, 2018

Accounting Changes And Error Corrections [Abstract]

Recently Issued Accounting Standards

NOTE 12:  Recently Issued Accounting Standards

In January 2016, the FASB issued ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities." This ASU addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments by making targeted improvements to GAAP as follows: (1) require equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. However, an entity may choose to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer; (2) simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment. When a qualitative assessment indicates that impairment exists, an entity is required to measure the investment at fair value; (3) eliminate the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities; (4) eliminate the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; (5) require public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (6) require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (7) require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; and (8) clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. ASU No. 2016-01 is effective for interim and annual reporting periods beginning after December 15, 2017. Early application is permitted as of the beginning of the fiscal year of adoption only for provisions (3) and (6) above. Early adoption of the other provisions mentioned above is not permitted. Starting with the first quarter of 2018, the Company began using an exit price notion when measuring the fair value of its loan portfolio, excluding loans held for sale, for disclosure purposes.  The new guidance did not impact the Company's Consolidated Financial Statements.

In February 2016, the FASB issued ASU No. 2016-02, "Leases." Under this guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases): 1) a lease liability, which is the present value of a lessee's obligation to make lease payments, and 2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Lessor accounting under the new guidance remains largely unchanged as it is substantially equivalent to existing guidance for sales-type leases, direct financing leases, and operating leases. Leveraged leases have been eliminated, although lessors can continue to account for existing leveraged leases using the current accounting guidance. Other limited changes were made to align lessor accounting with the lessee accounting model and the new revenue recognition standard. All entities will classify leases to determine how to recognize lease-related revenue and expense. Quantitative and qualitative disclosures will be required by lessees and lessors to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. The intention is to require enough information to supplement the amounts recorded in the financial statements so that users can understand more about the nature of an entity’s leasing activities. ASU No. 2016-02 is

effective for interim and annual reporting periods beginning after December 15, 2018; early adoption is permitted. All entities are required to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. Adoption of ASU 2016-02 is not expected to have a material impact on the Company's Consolidated Financial Statements.  The Company leases certain properties and equipment under operating leases that will result in the recognition of lease assets and lease liabilities on the Company’s Consolidated Balance Sheet.

In March 2016, the FASB issued ASU No. 2016-04, “Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products.” The amendments of this ASU narrowly address breakage, which is the monetary amount of the card that ultimately is not redeemed by the cardholder for prepaid stored-value products that are redeemable for monetary values of goods or services but may also be redeemable for cash. Examples of prepaid stored-value products included in this amendment are prepaid gift cards issued by specific payment networks and redeemable at network-accepting merchant locations, prepaid telecommunication cards, and traveler’s checks. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The Company adopted ASU 2016-04 during the first quarter of 2018 but there was no material impact to the financial statements as a result of the adoption of the new standard.

In June 2016, the FASB issued ASU No. 2016-13, “Measurement of Credit Losses on Financial Instruments.” This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that aren’t measured at fair value through net income. In issuing the standard, the FASB is responding to criticism that today’s guidance delays recognition of credit losses. The standard will replace today’s “incurred loss” approach with an “expected loss” model. The new model, referred to as the current expected credit loss (“CECL”) model, will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held-to-maturity securities, loan commitments, and financial guarantees. The CECL model does not apply to available-for-sale (“AFS”) debt securities. For AFS debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. As a result, entities will recognize improvements to estimated credit losses immediately in earnings rather than as interest income over time, as they do today. The ASU also simplifies the accounting model for purchased credit-impaired debt securities and loans. ASU 2016-13 also expands the disclosure requirements regarding an entity’s assumptions, models, and methods for estimating the allowance for loan and lease losses. In addition, entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU No. 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted for interim and annual reporting periods beginning after December 15, 2018. Entities will apply the standard’s provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company formed a CECL committee to assist with the implementation process, selected a vendor to assist with the implementation process, and is currently evaluating the provisions of ASU No. 2016-13 to determine the potential impact the new standard will have on the Company's Consolidated Financial Statements, including different methodologies that may be employed to estimate credit losses as well as additional data gathering that will be needed to adopt the standard.  The standard will add new disclosures related to factors that influenced management’s estimate, including current expected credit losses, the changes in those factors, and reasons for the changes as well as the method applied to revert to historical credit loss experience, and the Company expects to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the beginning of the first reporting period in which the new standard is effective, but has not yet determined the magnitude of any such one-time adjustment or the overall impact on the Company’s Financial Statements.

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in generally accepted accounting principles. The exception has led to diversity in practice and is a source of complexity in financial reporting. FASB decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this update eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments in this update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. The amendments in this update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The new guidance effective January 1, 2018 does not have a material impact on the Consolidated Financial Statements.

In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” The amendments in this update provide a more robust framework to use in determining when a set of assets and activities

is a business. Because the current definition of a business is interpreted broadly and can be difficult to apply, stakeholders indicated that analyzing transactions is inefficient and costly and that the definition does not permit the use of reasonable judgment. The amendments provide more consistency in applying the guidance, reduce the costs of application, and make the definition of a business more operable. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2017. The Company adopted ASU 2017-01 but there was no impact to the financial statements as a result of the adoption of the new standard.

In January 2017, the FASB issued ASU No. 2017-04, “Simplifying the Test for Goodwill Impairment,” to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. In computing the implied fair value of goodwill under Step 2, an entity had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities (including unrecognized assets and liabilities) following the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination. Instead, under the amendments in this update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable.  FASB also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. Therefore, the same impairment assessment applies to all reporting units. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements, but it is not expected to have a material impact.

In May 2017, the FASB issued ASU 2017-09, “Scope of Modification Accounting,” to provide clarity and reduce both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, “Compensation—Stock Compensation,” to a change to the terms or conditions of a share-based payment award.  The amendments in this update provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. An entity should account for the effects of a modification unless all the following are met: (1) the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified. If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification; (2) the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified; (3) the  classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The current disclosure requirements in Topic 718 apply regardless of whether an entity is required to apply modification accounting under the amendments in this update.  For public business entities, the amendments in this update become effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. An entity should apply the amendments in this update prospectively to an award modified on or after the adoption date. The Company adopted the new guidance but it did not have a material impact on the Consolidated Financial Statements.

In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.”  The amendments in this update more closely align the results of cash flow and fair value hedge accounting with risk management activities through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results in the financial statements. The amendments address specific limitations in current GAAP by expanding hedge accounting for both nonfinancial and financial risk components and by refining the measurement of hedge results to better reflect an entity’s hedging strategies. Thus, the amendments will enable an entity to report more faithfully the economic results of hedging activities for certain fair value and cash flow hedges and will avoid mismatches in earnings by allowing for greater precision when measuring changes in fair value of the hedged item for certain fair value hedges. Additionally, by aligning the timing of recognition of hedge results with the earnings effect of the hedged item for cash flow and net investment hedges, and by including the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is presented, the results of an entity’s hedging program and the cost of executing that program will be more visible to users of financial statements. Overall, those amendments are an improvement because an entity’s financial statements will reflect more accurately and comprehensively the intent and outcome of its hedging strategies. The tabular disclosure related to effects on the income statement of fair value and cash flow hedges and the disclosure of cumulative basis adjustments for fair value hedges provide

users with a more complete picture of the effect of hedge accounting on an entity’s income statement and balance sheet. When considered together, the amendments to presentation and disclosures are an improvement because they will provide users with more decision-useful information about the effect of an entity’s risk management activities on the financial statements. Additionally, the amendments in this Update should ease the operational burden of applying hedge accounting by allowing more time to prepare hedge documentation and, allowing effectiveness assessments to be performed on a qualitative basis after hedge inception. For public business entities, the amendments in this update become effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted, including adoption in an interim period. All transition requirements and elections should be applied to hedging relationships existing (that is, hedging relationships in which the hedging instrument has not expired, been sold, terminated, or exercised or the entity has not removed the designation of the hedging relationship) on the date of adoption. The effect of adoption should be reflected as of the beginning of the fiscal year of adoption (that is, the initial application date). For cash flow and net investment hedges existing at the date of adoption, an entity should apply a cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness to accumulated other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the amendments in this Update. The amended presentation and disclosure guidance is required only prospectively. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements.

In February 2018, the FASB issued ASU 2018-02, “Income Statement – Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”.  On December 22, 2017, the U.S. federal government enacted the Tax Act.  Stakeholders in the banking and insurance industries expressed concern about the guidance in current generally accepted accounting principles (GAAP) that requires deferred tax liabilities and assets to be adjusted for the effect of a change in tax laws or rates with the effect included in income from continuing operations in the reporting period that includes the enactment date. That guidance is applicable even in situations in which the related income tax effects of items in accumulated other comprehensive income were originally recognized in other comprehensive income (rather than in income from continuing operations).  Those stakeholders asserted that because the adjustment of deferred taxes due to the reduction of the historical corporate income tax rate to the newly enacted corporate income tax rate is required to be included in income from continuing operations, the tax effects of items within accumulated other comprehensive income (referred to as stranded tax effects) do not reflect the appropriate tax rate. The amendments in this update affect any entity that is required to apply the provisions of Topic 220, Income Statement—Reporting Comprehensive Income, and has items of other comprehensive income for which the related tax effects are presented in other comprehensive income as required by GAAP.  The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Act. Consequently, the amendments eliminate the stranded tax effects resulting from the Tax Act and will improve the usefulness of information reported to financial statement users. The amendments only relate to the reclassification of the income tax effects of the Tax Act; the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected.  The amendments in this update also require certain disclosures about stranded tax effects. The amendments in this update are effective for all entities for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption of the amendments in this update is permitted, including adoption in any interim period, for public business entities for reporting periods for which financial statements have not yet been issued.  The amendments in this update should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Act is recognized. The Company early adopted this update which resulted in a reclassification of $1,241 from accumulated other comprehensive income to retained earnings for stranded tax effects for the year ended December 31, 2017.

In June 2018, the FASB issued ASU No. 2018-07, “Compensation – Stock Compensation (Topic 718) - Improvements to Nonemployee Share-Based Payment Accounting,” to include share based payment transactions for acquiring goods and services from nonemployees. An entity should apply the requirements of Topic 718 to nonemployee awards except for specific guidance on inputs to an option pricing model and the attribution of cost (that is, the period of time over which share-based payment awards vest and the pattern of cost recognition over that period). The amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. The amendments also clarify that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Topic 606, Revenue from Contracts with Customers. The amendments in this update become effective for annual periods and interim periods within those annual periods beginning after December 15, 2018 but no earlier than an entity’s adoption date of Topic 606. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements, but it is not expected to have a material impact.

In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820) - Changes to the Disclosure Requirements for Fair Value Measurement,” to modify the disclosure requirements on fair value measurements in Topic 820 based on the concepts in the Concepts Statement, including the consideration of costs and benefits. The following disclosure requirements were removed from Topic 820: (1) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; (2) the

policy for timing of transfers between levels; (3) the valuation processes for Level 3 fair value measurements; and (4) for nonpublic entities, the changes in unrealized gains and losses for the period included in earnings for recurring Level 3 fair value measurements held at the end of the reporting period.  The following disclosure requirements were modified in Topic 820: (1) in lieu of a rollforward for Level 3 fair value measurements, a nonpublic entity is required to disclose transfers into and out of Level 3 of the fair value hierarchy and purchases and issues of Level 3 assets and liabilities; (2) for investments in certain entities that calculate net asset value, an entity is required to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly; and (3) the amendments clarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The following disclosure requirements were added to Topic 820: (1) the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period; (2) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information (such as the median or arithmetic average) in lieu of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. The amendments in this update are effective for annual periods and interim periods within those annual periods beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. Early adoption is permitted upon issuance of this update. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this update and delay adoption of the additional disclosures until their effective date. The Company is currently evaluating the impact of adopting the new guidance on the Consolidated Financial Statements, but it is not expected to have a material impact.

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Common Stock Outstanding and Earnings Per Share Data (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Factors Used in Earnings Per Share Computations

The following table presents the factors used in the earnings per share computations for the periods indicated.

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Basic
Net income available to common shareholders	$	37,985		$	22,050		$	105,784		$	53,883
Less: Earnings allocated to participating securities		(28	)		(46	)		(84	)		(121	)
Net income allocated to common shareholders	$	37,957		$	22,004		$	105,700		$	53,762
Weighted average common shares outstanding
including participating securities		87,881,806			60,032,804			85,026,929			56,442,506
Less: Participating securities (1)		(68,135	)		(126,194	)		(68,652	)		(126,806	)
Average shares		87,813,671			59,906,610			84,958,277			56,315,700
Basic earnings per common share	$	0.43		$	0.37		$	1.24		$	0.95
Diluted
Net income available to common shareholders	$	37,957		$	22,004		$	105,700		$	53,762
Weighted average common shares outstanding for
basic earnings per common share		87,813,671			59,906,610			84,958,277			56,315,700
Add: Dilutive effects of stock based compensation awards		997,031			1,208,395			1,251,432			1,014,567
Average shares and dilutive potential common shares		88,810,702			61,115,005			86,209,709			57,330,267
Diluted earnings per common share	$	0.43		$	0.36		$	1.23		$	0.94

1. Participating securities are restricted stock awards whereby the stock certificates have been issued, are included in outstanding shares, receive dividends and can be voted, but have not vested.   

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Fair Value (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are summarized below.

			Fair value measurements using
			Quoted prices	Significant
			in active	other		Significant
			markets for	observable		unobservable
	Carrying		identical assets	inputs		inputs
	value		(Level 1)	(Level 2)		(Level 3)
at September 30, 2018
Assets:
Available for sale securities
Corporate debt securities	$	6,361	—	$	6,361	—
Obligations of U.S. government sponsored entities and agencies		39,644	—		39,644	—
Mortgage backed securities		1,412,459	—		1,412,459	—
Municipal securities		78,378	—		78,378	—
Loans held for sale, at fair value		39,554	—		39,554	—
Mortgage banking derivatives		938	—	—			938
Interest rate swap derivatives		87,946	—		87,946	—
Liabilities:
Mortgage banking derivatives		27	—	—			27
Interest rate swap derivatives		88,065	—		88,065	—
at December 31, 2017
Assets:
Trading securities	$	6,777	—	$	6,777	—
Available for sale securities
U.S. Treasury securities		5,200	—		5,200	—
Obligations of U.S. government sponsored entities and agencies		9,574	—		9,574	—
Mortgage backed securities		972,611	—		972,611	—
Municipal securities		72,758	—		72,758	—
Interest rate swap derivatives		42,480	—		42,480	—
Liabilities:
Interest rate swap derivatives		43,259	—		43,259	—

Assets and Liabilities Measured at Fair Value on Non-Recurring Basis

Assets and liabilities measured at fair value on a non-recurring basis are summarized below.

			Fair value measurements using
					Significant
			Quoted prices in		other		Significant
			active markets for		observable		unobservable
	Carrying		identical assets		inputs		inputs
	value		(Level 1)		(Level 2)		(Level 3)
at September 30, 2018
Assets:
Impaired loans
Residential real estate	$	2,312	—		—		$	2,312
Commercial real estate		5,350	—		—			5,350
Land, land development and construction		942	—		—			942
Commercial		251	—		—			251
Consumer		52	—		—			52
Other real estate owned
Residential real estate		117						117
Commercial real estate		261	—		—			261
Land, land development and construction		1,312	—		—			1,312
Bank property held for sale		5,805	—		—			5,805
at December 31, 2017
Assets:
Impaired loans
Residential real estate	$	2,423		—		—	$	2,423
Commercial real estate		6,293		—		—		6,293
Land, land development and construction		292		—		—		292
Commercial		2,131		—		—		2,131
Consumer		57		—		—		57
Other real estate owned
Residential real estate		635		—		—		635
Commercial real estate		261		—		—		261
Land, land development and construction		1,481		—		—		1,481
Bank property held for sale		1,516		—		—		1,516

Carrying Amounts and Estimated Fair Values of Company's Financial Instruments

The following table presents the carry amounts and estimated fair values of the Company’s financial instruments:

			Fair value measurements
at September 30, 2018	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	606,331	$	606,331	$	—	$	—	$	606,331
Investment securities available for sale		1,536,842		—		1,536,842		—		1,536,842
Investment securities held to maturity		219,850		—		211,262		—		211,262
FHLB, FRB and other stock		70,311		—		—		—	n/a
Loans held for sale, at fair value		39,554		—		39,554		—		39,554
Loans, net		8,184,281		—		—		8,125,840		8,125,840
Mortgage banking derivatives		938		—		—		938		938
Interest rate swap derivatives		87,946		—		87,946		—		87,946
Accrued interest receivable		32,972		—		6,798		26,174		32,972
Financial liabilities:
Deposits- without stated maturities	$	7,612,238	$	7,612,238	$	—	$	—	$	7,612,238
Deposits- with stated maturities		1,862,288		—		1,867,827		—		1,867,827
Securities sold under agreement to repurchase		51,311		—		51,311		—		51,311
Federal funds purchased and other borrowings		643,002		—		643,002		—		643,002
Corporate debentures		41,328		—		—		37,928		37,928
Mortgage banking derivatives		27		—		—		27		27
Interest rate swap derivatives		88,065		—		88,065		—		88,065
Accrued interest payable		2,570		—		2,570		—		2,570

			Fair value measurements
at December 31, 2017	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	280,619	$	280,619	$	—	$	—	$	280,619
Trading securities		6,777		—		6,777		—		6,777
Investment securities available for sale		1,060,143		—		1,060,143		—		1,060,143
Investment securities held to maturity		232,399		—		231,615		—		231,615
FHLB and FRB stock		34,876		—		—		—	n/a
Loans held for sale		19,647		—		19,647		—		19,647
Loans, net		4,740,396		—		—		4,731,514		4,731,514
Interest rate swap derivatives		42,480		—		42,480		—		42,480
Accrued interest receivable		18,628		—		5,370		13,258		18,628
Financial liabilities:
Deposits- without stated maturities	$	4,727,840	$	4,727,840	$	—	$	—	$	4,727,840
Deposits- with stated maturities		832,683		—		845,039		—		845,039
Securities sold under agreement to repurchase		52,080		—		52,080		—		52,080
Federal funds purchased and other borrowings		506,490		—		506,490		—		506,490
Corporate debentures		26,192		—		—		22,363		22,363
Interest rate swap derivatives		43,259		—		43,259		—		43,259
Accrued interest payable		1,169		—		1,169		—		1,169

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Reportable Segments (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Reconciliation of Reportable Segment Revenues, Expenses and Profit

The table below is a reconciliation of the reportable segment revenues, expenses, and profit to the Company’s consolidated total for the three and nine month periods ending September 30, 2018 and 2017.

	Three month period ending September 30, 2018
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	110,764		$	3,899		$	—		$	—		$	114,663
Interest expense		(9,992	)		(2,005	)		(813	)		—			(12,810	)
Net interest income (expense)		100,772			1,894			(813	)		—			101,853
Provision for loan losses		(1,965	)		15			—			—			(1,950	)
Non interest income		18,808			8,296			—			—			27,104
Non interest expense		(70,652	)		(5,678	)		(1,009	)		—			(77,339	)
Net income (loss) before taxes		46,963			4,527			(1,822	)		—			49,668
Income tax (provision) benefit		(11,086	)		(1,147	)		550			—			(11,683	)
Net income	$	35,877		$	3,380		$	(1,272	)	$	—		$	37,985
Total assets	$	11,604,329		$	661,880		$	1,969,635		$	(1,961,479	)	$	12,274,365

	Nine month period ending September 30, 2018
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	317,851		$	10,600		$	—		$	—		$	328,451
Interest expense		(23,689	)		(4,734	)		(2,628	)		—			(31,051	)
Net interest income (expense)		294,162			5,866			(2,628	)		—			297,400
Provision for loan losses		(6,039	)		(144	)		—			—			(6,183	)
Non interest income		49,228			23,495			8			—			72,731
Non interest expense		(213,934	)		(16,172	)		(2,841	)		—			(232,947	)
Net income (loss) before taxes		123,417			13,045			(5,461	)		—			131,001
Income tax (provision) benefit		(28,585	)		(3,305	)		6,673			—			(25,217	)
Net income (loss)	$	94,832		$	9,740		$	1,212		$	—		$	105,784
Total assets	$	11,604,329		$	661,880		$	1,969,635		$	(1,961,479	)	$	12,274,365

	Three month period ending September 30, 2017
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	64,410		$	2,647		$	—		$	—		$	67,057
Interest expense		(3,305	)		(819	)		(347	)		—			(4,471	)
Net interest income (expense)		61,105			1,828			(347	)		—			62,586
Provision for loan losses		(1,113	)		17			—			—			(1,096	)
Non interest income		9,528			7,213			—			—			16,741
Non interest expense		(38,432	)		(5,304	)		(886	)		—			(44,622	)
Net income (loss) before taxes		31,088			3,754			(1,233	)		—			33,609
Income tax (provision) benefit		(10,579	)		(1,448	)		468			—			(11,559	)
Net income	$	20,509		$	2,306		$	(765	)	$	—		$	22,050
Total assets	$	6,319,532		$	498,669		$	940,571		$	(935,911	)	$	6,822,861

	Nine month period ending September 30, 2017
				Correspondent			Corporate
	Commercial			banking and			overhead
	and retail			capital markets			and			Elimination
	banking			division			administration			entries			Total
Interest income	$	175,015		$	7,889		$	—		$	—		$	182,904
Interest expense		(7,934	)		(2,048	)		(998	)		—			(10,980	)
Net interest income (expense)		167,081			5,841			(998	)		—			171,924
Provision for loan losses		(4,073	)		83			—			—			(3,990	)
Non interest income		26,493			21,724			—			—			48,217
Non interest expense		(119,304	)		(15,594	)		(2,576	)		—			(137,474	)
Net income (loss) before taxes		70,197			12,054			(3,574	)		—			78,677
Income tax (provision) benefit		(22,900	)		(4,649	)		2,755			—			(24,794	)
Net income (loss)	$	47,297		$	7,405		$	(819	)	$	—		$	53,883
Total assets	$	6,319,532		$	498,669		$	940,571		$	(935,911	)	$	6,822,861

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Investment securities (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value of Available for Sale Securities and Related Gross Unrealized Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss)

The fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:

	September 30, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Corporate debt securities	$	6,265	$	96	$	—	$	6,361
Obligations of U.S. government sponsored entities and agencies		40,882		6		1,244		39,644
Mortgage backed securities		1,460,552		54		48,147		1,412,459
Municipal securities		79,375		151		1,148		78,378
Total available-for-sale	$	1,587,074	$	307	$	50,539	$	1,536,842
	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
U.S. Treasury securities	$	5,000	$	200	$	—	$	5,200
Obligations of U.S. government sponsored entities and agencies		10,000		—		426		9,574
Mortgage backed securities		982,565		752		10,706		972,611
Municipal securities		71,961		863		66		72,758
Total available-for-sale	$	1,069,526	$	1,815	$	11,198	$	1,060,143

Schedule of Sales of Available for Sale Securities

Sales of available for sale securities for the nine months ended September 30, 2018 and 2017 were as follows:

For the nine months ended:	September 30, 2018		September 30, 2017
Proceeds	$	364,152	$	260,824
Gross gains		68		—
Gross losses		90		—

Fair Value of Held to Maturity Securities and Related Gross Unrecognized Gains and Losses

The following reflects the fair value of held-to-maturity securities and the related gross unrecognized gains and losses as of September 30, 2018 and December 31, 2017.

	September 30, 2018
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities	$	87,872	$	—	$	3,627	$	84,245
Municipal securities		131,978		410		5,371		127,017
Total held-to-maturity	$	219,850	$	410	$	8,998	$	211,262
	December 31, 2017
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities	$	100,039	$	—	$	1,068	$	98,971
Municipal securities		132,360		1,781		1,497		132,644
Total held to maturity	$	232,399	$	1,781	$	2,565	$	231,615

Available-for-sale Securities [Member]

Fair Value and Amortized Cost of Investment Securities by Contractual Maturity

The fair value of available for sale securities at September 30, 2018 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately.

	Fair		Amortized
Investment securities available for sale:	Value		Cost
Due one year or less	$	782	$	781
Due after one year through five years		5,537		5,502
Due after five years through ten years		29,657		30,535
Due after ten years through thirty years		88,407		89,704
Mortgage backed securities		1,412,459		1,460,552
Total available-for-sale	$	1,536,842	$	1,587,074

Investments Gross Unrealized Losses and Fair Value

The following tables show the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2018 and December 31, 2017.

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Obligations of U.S. government sponsored entities and agencies	$	27,193	$	352	$	9,108	$	892	$	36,301	$	1,244
Mortgage backed securities		1,047,726		29,046		360,105		19,101		1,407,831		48,147
Municipal securities		70,028		1,148		—		—		70,028		1,148
Total temporarily impaired available-for-sale securities	$	1,144,947	$	30,546	$	369,213	$	19,993	$	1,514,160	$	50,539
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
Obligations of U.S. government sponsored entities and agencies	$	—	$	—	$	9,574	$	426	$	9,574	$	426
Mortgage backed securities		477,925		3,298		316,066		7,408		793,991		10,706
Municipal securities		11,698		66		—		—		11,698		66
Total temporarily impaired available-for-sale securities	$	489,623	$	3,364	$	325,640	$	7,834	$	815,263	$	11,198

Held-to-maturity Securities [Member]

Fair Value and Amortized Cost of Investment Securities by Contractual Maturity

The fair value and amortized cost of held-to-maturity securities at September 30, 2018 by contractual maturity were as follows. Mortgage-backed securities are not due at a single maturity date and are shown separately.

	Fair		Amortized
Investment securities held-to-maturity	Value		Cost
Due after five years through ten years	$	2,039	$	2,048
Due after ten years through thirty years		124,978		129,930
Mortgage backed securities		84,245		87,872
Total held-to-maturity	$	211,262	$	219,850

Investments Gross Unrealized Losses and Fair Value

The following table shows the Company’s held-to-maturity investments’ gross unrecognized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrecognized loss position, at September 30, 2018 and December 31, 2017.

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrecognized		Fair		Unrecognized		Fair		Unrecognized
	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities	$	22,791	$	924	$	61,454	$	2,703	$	84,245	$	3,627
Municipal securities		57,662		1,558		37,428		3,813		95,090		5,371
Total temporarily impaired held-to-maturity securities	$	80,453	$	2,482	$	98,882	$	6,516	$	179,335	$	8,998
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrecognized		Fair		Unrecognized		Fair		Unrecognized
	Value		Losses		Value		Losses		Value		Losses
Mortgage backed securities	$	57,266	$	451	$	41,705	$	617	$	98,971	$	1,068
Municipal securities		13,350		186		37,963		1,311		51,313		1,497
Total temporarily impaired held-to-maturity securities	$	70,616	$	637	$	79,668	$	1,928	$	150,284	$	2,565

XML

Loans (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Summary of Information Concerning Loan Portfolio by Collateral Types

The following table sets forth information concerning the loan portfolio by collateral types as of the dates indicated.

	September 30, 2018			December 31, 2017
Loans excluding PCI loans
Real estate loans
Residential	$	1,713,093		$	1,025,303
Commercial		4,395,351			2,546,143
Land, development and construction		645,885			235,816
Total real estate		6,754,329			3,807,262
Commercial		1,104,392			693,501
Consumer and other loans		194,603			107,480
Loans before unearned fees and deferred cost		8,053,324			4,608,243
Net unearned fees and costs		2,097			820
Total loans excluding PCI loans		8,055,421			4,609,063
PCI loans (note 1)
Real estate loans
Residential		62,507			59,975
Commercial		92,444			92,791
Land, development and construction		6,955			6,656
Total real estate		161,906			159,422
Commercial		5,479			4,444
Consumer and other loans		286			292
Total PCI loans		167,671			164,158
Total loans		8,223,092			4,773,221
Allowance for loan losses for loans that are not PCI loans		(38,595	)		(32,530	)
Allowance for loan losses for PCI loans		(216	)		(295	)
Total loans, net of allowance for loan losses	$	8,184,281		$	4,740,396

Note 1: Purchased credit impaired (“PCI”) loans are being accounted for pursuant to ASC Topic 310-30.

Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio

The table below set forth the activity in the allowance for loan losses for the periods presented.

	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Three months ended September 30, 2018
Balance at beginning of period	$	37,209		$	275		$	37,484
Loans charged-off		(1,178	)		—			(1,178	)
Recoveries of loans previously charged-off		555			—			555
Net charge-offs		(623	)		—			(623	)
Provision for loan losses		2,009			(59	)		1,950
Balance at end of period	$	38,595		$	216		$	38,811
Three months ended September 30, 2017
Balance at beginning of period	$	29,769		$	363		$	30,132
Loans charged-off		(472	)		—			(472	)
Recoveries of loans previously charged-off		1,072			—			1,072
Net recoveries		600			—			600
Provision for loan losses		1,174			(78	)		1,096
Balance at end of period	$	31,543		$	285		$	31,828
	Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
Nine months ended September 30, 2018
Balance at beginning of period	$	32,530		$	295		$	32,825
Loans charged-off		(2,170	)		—			(2,170	)
Recoveries of loans previously charged-off		1,898			75			1,973
Net (charge-offs) recoveries		(272	)		75			(197	)
Provision for loan losses		6,337			(154	)		6,183
Balance at end of period	$	38,595			216		$	38,811
Nine months ended September 30, 2017
Balance at beginning of period	$	26,569		$	472		$	27,041
Loans charged-off		(1,722	)		—			(1,722	)
Recoveries of loans previously charged-off		2,454			65			2,519
Net recoveries		732			65			797
Provision for loan losses		4,242			(252	)		3,990
Balance at end of period	$	31,543		$	285		$	31,828

The following tables present the activity in the allowance for loan losses by portfolio segment for the periods presented.

	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are not PCI loans:
Three months ended September 30, 2018
Beginning of the period	$	5,847		$	21,921		$	1,629		$	5,412		$	2,400		$	37,209
Charge-offs		(283	)		—			(62	)		(327	)		(506	)		(1,178	)
Recoveries		217			113			2			152			71			555
Provision for loan losses		71			916			21			404			597			2,009
Balance at end of period	$	5,852		$	22,950		$	1,590		$	5,641		$	2,562		$	38,595
Three months ended September 30, 2017
Beginning of the period	$	6,134		$	17,238		$	1,175		$	3,590		$	1,632		$	29,769
Charge-offs		(108	)		(8	)		—			(140	)		(216	)	$	(472	)
Recoveries		290			320			353			82			27		$	1,072
Provision for loan losses		(292	)		1,074			(393	)		458			327		$	1,174
Balance at end of period	$	6,024		$	18,624		$	1,135		$	3,990		$	1,770		$	31,543
	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are PCI loans:
Three months ended September 30, 2018
Beginning of the period	$	—		$	59		$	202		$	—		$	14		$	275
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			—			—			—
Provision for loan losses		—			(59	)		—			—			—			(59	)
Balance at end of period	$	—		$	—		$	202		$	—		$	14		$	216
Three months ended September 30, 2017
Beginning of the period	$	50		$	123		$	176		$	—		$	14		$	363
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			—			—			—
Provision for loan losses		(50	)		(65	)		37			—			—			(78	)
Balance at end of period	$	—		$	58		$	213		$	—		$	14		$	285

	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are not PCI loans:
Nine months ended September 30, 2018
Beginning of the period	$	6,003		$	19,304		$	1,179		$	4,130		$	1,914		$	32,530
Charge-offs		(419	)		—			(62	)		(555	)		(1,134	)		(2,170	)
Recoveries		855			569			3			214			257			1,898
Provision for loan losses		(587	)		3,077			470			1,852			1,525			6,337
Balance at end of period	$	5,852		$	22,950		$	1,590		$	5,641		$	2,562		$	38,595
Nine months ended September 30, 2017
Beginning of the period	$	5,640		$	14,713		$	883		$	3,785		$	1,548		$	26,569
Charge-offs		(250	)		(72	)		—			(677	)		(723	)		(1,722	)
Recoveries		816			626			596			254			162			2,454
Provision for loan losses		(182	)		3,357			(344	)		628			783			4,242
Balance at end of period	$	6,024		$	18,624		$	1,135		$	3,990		$	1,770		$	31,543
	Real Estate Loans
	Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
Allowance for loan losses for loans that are PCI loans:
Nine months ended September 30, 2018
Beginning of the period	$	—		$	59		$	222		$	—		$	14		$	295
Charge-offs		—			—			—			—			—			—
Recoveries		—			—			—			75			—			75
Provision for loan losses		—			(59	)		(20	)		(75	)		—			(154	)
Balance at end of period	$	—		$	—		$	202		$	—		$	14		$	216
Nine months ended September 30, 2017
Beginning of the period	$	54		$	92		$	312		$	—		$	14		$	472
Charge-offs		—			—			—			—			—			—
Recoveries		—			65			—			—			—			65
Provision for loan losses		(54	)		(99	)		(99	)		—			—			(252	)
Balance at end of period	$	—		$	58		$	213		$	—		$	14		$	285

Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method

The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 and December 31, 2017. Accrued interest receivable and unearned loan fees and costs are not included in the recorded investment because they are not material.

	Real Estate Loans
As of September 30, 2018	Residential		Commercial		Land, develop., constr.		Comm. & industrial		Consumer & other		Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	417	$	445	$	—	$	546	$	5	$	1,413
Collectively evaluated for impairment		5,435		22,505		1,590		5,095		2,557		37,182
Purchased credit impaired		—		—		202		—		14		216
Total ending allowance balance	$	5,852	$	22,950	$	1,792	$	5,641	$	2,576	$	38,811
Loans:
Individually evaluated for impairment	$	7,055	$	7,686	$	971	$	1,292	$	164	$	17,168
Collectively evaluated for impairment		1,706,038		4,387,665		644,914		1,103,100		194,439		8,036,156
Purchased credit impaired		62,507		92,444		6,955		5,479		286		167,671
Total ending loan balances	$	1,775,600	$	4,487,795	$	652,840	$	1,109,871	$	194,889	$	8,220,995

	Real Estate Loans
As of December 31, 2017		Residential		Commercial		Land, develop., constr.		Comm. & industrial		Consumer & other		Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment		$	586	$	—	$	4	$	206	$	8	$	804
Collectively evaluated for impairment			5,417		19,304		1,175		3,924		1,906		31,726
Purchased credit impaired			—		59		222		—		14		295
Total ending allowance balance		$	6,003	$	19,363	$	1,401	$	4,130	$	1,928	$	32,825
Loans:
Individually evaluated for impairment		$	8,101	$	8,218	$	331	$	3,497	$	198	$	20,345
Collectively evaluated for impairment			1,017,202		2,537,925		235,485		690,004		107,282		4,587,898
Purchased credit impaired			59,975		92,791		6,656		4,444		292		164,158
Total ending loan balance		$	1,085,278	$	2,638,934	$	242,472	$	697,945	$	107,772	$	4,772,401

Summary of Impaired Loans

The table below summarizes impaired loan data for the periods presented.

	Sep. 30, 2018		Dec. 31, 2017
Performing TDRs (these are not included in nonperforming loans ("NPLs"))	$	9,204	$	12,081
Nonperforming TDRs (these are included in NPLs)		1,284		698
Total TDRs (these are included in impaired loans)		10,488		12,779
Impaired loans that are not TDRs		6,680		7,566
Total impaired loans	$	17,168	$	20,345

Troubled Debt Restructured Loans by Loans Type

TDRs as of September 30, 2018 and December 31, 2017 quantified by loan type classified separately as accrual (performing loans) and non-accrual (non performing loans) are presented in the tables below.

As of September 30, 2018	Accruing		Non-Accrual		Total
Real estate loans:
Residential	$	6,525	$	530	$	7,055
Commercial		1,855		687		2,542
Land, development, construction		81		41		122
Total real estate loans		8,461		1,258		9,719
Commercial		605		—		605
Consumer and other		138		26		164
Total TDRs	$	9,204	$	1,284	$	10,488
As of December 31, 2017	Accruing		Non-Accrual		Total
Real estate loans:
Residential	$	7,737	$	364	$	8,101
Commercial		3,286		306		3,592
Land, development, construction		332		—		332
Total real estate loans		11,355		670		12,025
Commercial		556		—		556
Consumer and other		170		28		198
Total TDRs	$	12,081	$	698	$	12,779

Summary of Loans by Class Modified

The following table presents loans by class modified and for which there was a payment default within twelve months following the modification during the periods ending September 30, 2018 and 2017.

	Period ending				Period ending
	September 30, 2018				September 30, 2017
	Number		Recorded		Number		Recorded
	of loans		investment		of loans		investment
Residential		1	$	191		1	$	72
Commercial real estate		1		116		2		616
Land, development, construction		—		—		—		—
Commercial and Industrial		—		—		—		—
Consumer and other		—		—		—		—
Total		2	$	307		3	$	688

Summary of Loans Individually Evaluated for Impairment by Class of Loans

The following tables present loans individually evaluated for impairment by class of loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30. The recorded investment is less than the unpaid principal balance due to partial charge-offs.

As of September 30, 2018	Unpaid principal balance		Recorded investment		Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate	$	4,105	$	3,977	$	—
Commercial real estate		6,634		6,090		—
Land, development, construction		1,009		971		—
Commercial and industrial		427		416		—
Consumer, other		111		111		—
With an allowance recorded:
Residential real estate		3,235		3,078		417
Commercial real estate		1,600		1,596		445
Land, development, construction		—		—		—
Commercial and industrial		880		876		546
Consumer, other		72		53		5
Total	$	18,073	$	17,168	$	1,413

As of December 31, 2017	Unpaid principal balance		Recorded investment		Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate	$	4,945	$	4,818	$	—
Commercial real estate		8,973		8,218		—
Land, development, construction		260		210		—
Commercial and industrial		3,374		2,968		—
Consumer, other		142		127		—
With an allowance recorded:
Residential real estate		3,426		3,283		586
Commercial real estate		—		—		—
Land, development, construction		140		121		4
Commercial and industrial		531		529		206
Consumer, other		78		71		8
Total	$	21,869	$	20,345	$	804

Summary of Impairment by Class of Loans

Three months ended September 30, 2018	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,328	$	79	$	—
Commercial		7,674		25		—
Land, development, construction		961		2		—
Total real estate loans		15,963		106		—
Commercial and industrial		1,596		9		—
Consumer and other loans		165		2		—
Total	$	17,724	$	117	$	—
Nine months ended September 30, 2018	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	15,306	$	308	$	—
Commercial		2,586		25		—
Land, development, construction		324		2		—
Total real estate loans		18,216		335		—
Commercial and industrial		538		9		—
Consumer and other loans		56		2		—
Total	$	18,810	$	346	$	—

Three months ended September 30, 2017	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,536	$	70	$	—
Commercial		9,200		35		—
Land, development, construction		343		5		—
Total real estate loans		17,079		110		—
Commercial and industrial		1,859		7		—
Consumer and other loans		262		3		—
Total	$	19,200	$	120	$	—
Nine months ended September 30, 2017	Average of impaired loans		Interest income recognized during impairment		Cash basis interest income recognized
Real estate loans:
Residential	$	7,767	$	207	$	—
Commercial		8,979		104		—
Land, development, construction		465		13		—
Total real estate loans		17,211		324		—
Commercial and industrial		1,702		22		—
Consumer and other loans		245		8		—
Total	$	19,158	$	354	$	—

Summary of Nonperforming Loans

Nonperforming loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30.

Nonperforming loans were as follows:	Sep. 30, 2018		Dec. 31, 2017
Non accrual loans	$	23,450	$	17,288
Loans past due over 90 days and still accruing interest		—		—
Total non performing loans	$	23,450	$	17,288

Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due Over 90 Days Still on Accrual by Class of Loans

The following table presents the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans:  

As of September 30, 2018	Nonaccrual		Loans past due over 90 days still accruing
Residential real estate	$	9,234	$	—
Commercial real estate		9,108		—
Land, development, construction		2,441		—
Commercial		2,237		—
Consumer, other		430		—
Total	$	23,450	$	—
As of December 31, 2017	Nonaccrual		Loans past due over 90 days still accruing
Residential real estate	$	7,107	$	—
Commercial real estate		6,549		—
Land, development, construction		138		—
Commercial		3,121		—
Consumer, other		373		—
Total	$	17,288	$	—

Summary Aging of Recorded Investment in Past Due Loans

The following table presents the aging of the recorded investment in past due loans as of September 30, 2018 and December 31, 2017, excluding purchased credit impaired loans:  

					Accruing Loans
	Total		30 - 59 days past due		60 - 89 days past due		Greater than 90 days past due		Total Past Due		Loans Not Past Due		Nonaccrual Loans
As of September 30, 2018
Residential real estate	$	1,713,093	$	4,011	$	4,177	$	—	$	8,188	$	1,695,671	$	9,234
Commercial real estate		4,395,351		8,556		5,907		—		14,463		4,371,780		9,108
Land/dev/construction		645,885		796		526		—		1,322		642,122		2,441
Commercial		1,104,392		2,327		970		—		3,297		1,098,858		2,237
Consumer		194,603		929		191		—		1,120		193,053		430
	$	8,053,324	$	16,619	$	11,771	$	—	$	28,390	$	8,001,484	$	23,450
					Accruing Loans
	Total		30 - 59 days past due		60 - 89 days past due		Greater than 90 days past due		Total Past Due		Loans Not Past Due		Nonaccrual Loans
As of December 31, 2017
Residential real estate	$	1,025,303	$	3,568	$	1,821	$	—	$	5,389	$	1,012,807	$	7,107
Commercial real estate		2,546,143		1,158		2,272		—		3,430		2,536,164		6,549
Land/dev/construction		235,816		2,807		189		—		2,996		232,682		138
Commercial		693,501		568		763		—		1,331		689,049		3,121
Consumer		107,480		471		48		—		519		106,588		373
	$	4,608,243	$	8,572	$	5,093	$	—	$	13,665	$	4,577,290	$	17,288

Risk Category of Loans by Class of Loans, Excluding Purchased Credit Impaired Loans

			As of September 30, 2018
Loan Category	Pass		Special Mention		Substandard		Doubtful
Residential real estate	$	1,639,770	$	46,373	$	26,950	$	—
Commercial real estate		4,181,026		167,606		46,719		—
Land/dev/construction		604,023		36,933		4,929		—
Commercial		1,076,627		23,896		3,869		—
Consumer		193,671		263		669		—
Total	$	7,695,117	$	275,071	$	83,136	$	—
			As of December 31, 2017
Loan Category	Pass		Special Mention		Substandard		Doubtful
Residential real estate	$	987,472	$	20,435	$	17,396	$	—
Commercial real estate		2,411,085		115,942		19,116		—
Land/dev/construction		217,555		17,699		562		—
Commercial		674,764		14,186		4,551		—
Consumer		106,735		139		606		—
Total	$	4,397,611	$	168,401	$	42,231	$	—

Investment in Residential and Consumer Loans, Excluding Loans from Purchased Credit Impaired Loans

The following table presents the recorded investment in residential and consumer loans, excluding purchased credit impaired loans, based on payment activity as of September 30, 2018 and December 31, 2017:

As of September 30, 2018	Residential		Consumer
Performing	$	1,703,859	$	194,173
Nonperforming		9,234		430
Total	$	1,713,093	$	194,603
As of December 31, 2017	Residential		Consumer
Performing	$	1,018,196	$	107,107
Nonperforming		7,107		373
Total	$	1,025,303	$	107,480

Summary of Total Contractually Required Principal and Interest Cash Payments, Management's Estimate of Expected Total Cash Payments and Carrying Value of Loans

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans as of September 30, 2018 and December 31, 2017. Contractually required principal and interest payments have been adjusted for estimated prepayments.

	Sep. 30, 2018			Dec. 31, 2017
Contractually required principal and interest	$	294,278		$	248,283
Non-accretable difference		(59,433	)		(13,183	)
Cash flows expected to be collected		234,845			235,100
Accretable yield		(67,174	)		(70,942	)
Carrying value of acquired loans		167,671			164,158
Allowance for loan losses		(216	)		(295	)
Carrying value less allowance for loan losses	$	167,455		$	163,863

Summary of Changes in Total Contractually Required Principal and Interest Cash Payments

The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three and nine month periods ending September 30, 2018 and 2017.

Activity during the				Effect of			income		all other
three month period ending September 30, 2018	Jun. 30, 2018			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	285,576		$	33,687		$	—	$	(24,985	)	$	294,278
Non-accretable difference		(44,166	)		(20,763	)		—		5,496			(59,433	)
Cash flows expected to be collected		241,410			12,924			—		(19,489	)		234,845
Accretable yield		(67,460	)		(1,492	)		7,682		(5,904	)		(67,174	)
Carry value of acquired loans	$	173,950		$	11,432		$	7,682	$	(25,393	)	$	167,671
Activity during the				Effect of			income		all other
nine month period ending September 30, 2018	Dec. 31, 2017			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	248,283		$	122,392		$	—	$	(76,397	)	$	294,278
Non-accretable difference		(13,183	)		(58,927	)		—		12,677			(59,433	)
Cash flows expected to be collected		235,100			63,465			—		(63,720	)		234,845
Accretable yield		(70,942	)		(7,770	)		26,496		(14,958	)		(67,174	)
Carry value of acquired loans	$	164,158		$	55,695		$	26,496	$	(78,678	)	$	167,671
Activity during the				Effect of			income		all other
three month period ending September 30, 2017	Jun. 30, 2017			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	280,114		$	—		$	—	$	(21,776	)	$	258,338
Non-accretable difference		(14,047	)		—			—		1,148			(12,899	)
Cash flows expected to be collected		266,067			—			—		(20,628	)		245,439
Accretable yield		(86,703	)		—			7,696		(2,457	)		(81,464	)
Carry value of acquired loans	$	179,364		$	—		$	7,696	$	(23,085	)	$	163,975
Activity during the				Effect of			income		all other
nine month period ending September 30, 2017	Dec. 31, 2016			acquisitions			accretion		adjustments			Sep. 30, 2018
Contractually required principal and interest	$	297,821		$	20,729		$	—	$	(60,212	)	$	258,338
Non-accretable difference		(18,372	)		(6,347	)		—		11,820			(12,899	)
Cash flows expected to be collected		279,449			14,382			—		(48,392	)		245,439
Accretable yield		(93,525	)		(3,266	)		24,780		(9,453	)		(81,464	)
Carry value of acquired loans	$	185,924		$	11,116		$	24,780	$	(57,845	)	$	163,975

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Loans Held for Sale (Tables)

9 Months Ended

Sep. 30, 2018

Loans Receivable Held For Sale Net [Abstract]

Summary of Activity in Mortgage Loans Held for Sale

The table below summarizes the activity in mortgage loans held for sale during the three month periods ending September 30, 2018 and 2017.

	Three month periods ended						Nine month periods ended
	Sep. 30, 2018			Sep. 30, 2017			Sep. 30, 2018			Sep. 30, 2017
Beginning balance	$	36,366		$	8,959		$	19,647		$	2,285
Effect from acquisitions		2,835			—			8,959			—
Loans originated		91,910			23,444			242,226			53,806
Proceeds from sales		(94,226	)		(20,564	)		(238,613	)		(44,780	)
Change in fair value		1			—			723			—
Net realized gain on sales		2,668		404				6,612			932
Ending balance	$	39,554		$	12,243		$	39,554		$	12,243

Summary of Notional Amounts for Interest Rate Lock Commitments and Best Efforts Forward Trades and MBS Forward Trades Pertaining to Loans Held for Sale

The table below summarizes the notional amounts for interest rate lock commitments, best efforts forward trades and MBS forward trades pertaining to loans held for sale at September 30, 2018.

	Notional
Interest rate lock commitments	$	75,811
Best efforts forward trades		66,425
MBS forward trades		27,000
Total derivative instruments	$	169,236

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Securities Sold Under Agreement to Repurchase (Tables)

9 Months Ended

Sep. 30, 2018

Banking And Thrift [Abstract]

Summary of Repurchase Agreement

The following table provides additional details for the periods presented.

	MBS			Municipal
As of September 30, 2018	Securities			Securities			Total
Market value of securities pledged	$	66,849		$	434		$	67,283
Borrowings related to pledged amounts		51,195		116				51,311
Market value pledged as a % of borrowings		131	%		374	%		131	%
As of December 31, 2017
Market value of securities pledged	$	59,239		$	443		$	59,682
Borrowings related to pledged amounts		52,030		50				52,080
Market value pledged as a % of borrowings		114	%		886	%		115	%

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Business Combinations (Tables)

9 Months Ended

Sep. 30, 2018

Pro-Forma Financial Information of Acquisition

Pro-forma data for the three month period ending September 30, 2017 listed in the table below presents pro-forma information as if the Gateway, Sunshine, Harbor and Charter acquisitions occurred at the beginning of 2017.  Pro-forma data for the nine month period ending September 30, 2017 listed in the table below presents pro-forma information as if the Platinum, Gateway, Sunshine, Harbor and Charter acquisitions occurred at the beginning of 2017.  Pro-forma data for the three and nine month periods ending September 30, 2018 listed in the table below presents pro-forma information as if the Charter acquisition occurred at the beginning of 2017.  

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Net interest income	$	112,182	$	109,779	$	339,786	$	315,211
Net income available to common shareholders	$	51,250	$	32,011	$	131,102	$	89,823
EPS - basic	$	0.54	$	0.34	$	1.38	$	0.96
EPS - diluted	$	0.53	$	0.33	$	1.36	$	0.94

Platinum Bank Holding Company [Member]

Summary of Purchase Price Calculation

The table below summarizes the purchase price calculation.

Number of shares of Platinum common stock outstanding at March 31, 2017		1,131,134
Per share exchange ratio	3.7832
Number of shares of CenterState common stock less 51 of fractional shares		4,279,255
Multiplied by CenterState common stock price per share on March 31, 2017	$	25.90
Fair value of CenterState common stock issued	$	110,833
Total Platinum common shares		1,131,134
Multiplied by the cash consideration each Platinum share is entitled to receive	$	7.60
Total cash consideration, not including cash for fractional shares	$	8,597
Total stock consideration	$	110,833
Total cash consideration plus $1 for 51 of fractional shares	$	8,598
Total purchase price	$	119,431

Summary of Fair Value of Assets Purchased, Including Goodwill and Liabilities Assumed

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the April 1, 2017 purchase date.

	April 1, 2017
Assets:
Cash and cash equivalents	$	106,537
Loans, held for investment		442,366
Purchased credit impaired loans		12,218
Investments		28,873
Accrued interest receivable		1,216
Branch real estate		9,600
Furniture and fixtures		402
Bank property held for sale		4,382
FHLB stock		2,220
Other repossessed real estate owned		272
Core deposit intangible		3,992
Goodwill		73,829
Deferred tax asset		227
Other assets		29
Total assets acquired	$	686,163
Liabilities:
Deposits	$	520,423
Federal Home Loan Bank advances		40,546
Securities sold under agreement to repurchase		5,569
Accrued interest payable		94
Other liabilities		100
Total liabilities assumed	$	566,732

Summary of Contractually Required Principal and Interest Cash Payments for Purchased Credit Impaired Loans

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of April 1, 2017 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	18,811
Non-accretable difference		(4,639	)
Cash flows expected to be collected		14,172
Accretable yield		(1,954	)
Total purchased credit-impaired loans acquired	$	12,218

Summary of Fair Value of Acquired Loans and Unpaid Principal Balance

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	37,206	$	37,419
Commercial real estate		262,612		259,727
Construction/development/land		47,675		46,618
Commercial loans		96,587		95,701
Consumer and other loans		2,954		2,901
Purchased credit-impaired		16,530		12,218
Total earning assets	$	463,564	$	454,584

Gateway Financial Holdings Of Florida Inc [Member]

Summary of Purchase Price Calculation

The table below summarizes the purchase price calculation.

Number of shares of Gateway common stock outstanding at April 30, 2017		5,463,764
Gateway preferred shares that converted to Gateway common shares upon a change in control		919,236
Total Gateway common shares including conversion of preferred shares		6,383,000
Number of shares of Gateway common shares exchanged for CenterState common stock		4,468,100
Per share exchange ratio	0.95
Number of shares of CenterState common stock less 254 of fractional shares		4,244,441
Multiplied by CenterState common stock price per share on April 30, 2017	$	25.23
Fair value of CenterState common stock issued	$	107,087
Number of shares of Gateway common shares exchanged for cash		1,914,900
Multiplied by the cash consideration each Gateway share is entitled to receive	$	18.00
Total cash consideration, not including cash for fractional shares	$	34,468
Total stock consideration	$	107,087
Total cash consideration plus $6 for 254 of fractional shares	$	34,474
Total consideration paid to Gateway common shareholders	$	141,561
Fair value of Gateway stock options converted to CenterState stock options	$	15,811
Total purchase price	$	157,372

Summary of Fair Value of Assets Purchased, Including Goodwill and Liabilities Assumed

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the May 1, 2017 purchase date.

	May 1, 2017
Assets:
Cash and cash equivalents	$	23,065
Loans, held for investment		560,413
Purchased credit impaired loans		7,827
Investments		231,951
Accrued interest receivable		2,422
Branch real estate		18,160
Furniture and fixtures		702
Bank property held for sale		1,087
Federal Reserve Bank and Federal Home Loan Bank stock		4,640
Other repossessed real estate owned		134
Bank owned life insurance		15,475
Servicing asset		271
Core deposit intangible		8,432
Goodwill		77,826
Deferred tax asset		7,246
Other assets		1,217
Total assets acquired	$	960,868
Liabilities:
Deposits	$	708,209
Federal Home Loan Bank advances		90,598
Federal funds purchased		3,588
Accrued interest payable		304
Other liabilities		797
Total liabilities assumed	$	803,496

Summary of Contractually Required Principal and Interest Cash Payments for Purchased Credit Impaired Loans

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of May 1, 2017 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	12,523
Non-accretable difference		(2,465	)
Cash flows expected to be collected		10,058
Accretable yield		(2,231	)
Total purchased credit-impaired loans acquired	$	7,827

Summary of Fair Value of Acquired Loans and Unpaid Principal Balance

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	142,881	$	142,468
Commercial real estate		321,262		317,578
Construction/development/land		47,727		46,489
Commercial loans		46,953		46,274
Consumer and other loans		7,803		7,604
Purchased credit-impaired		11,093		7,827
Total earning assets	$	577,719	$	568,240

Sunshine Bancorp, Inc. [Member]

Summary of Purchase Price Calculation

The table below summarizes the purchase price calculation.

Number of shares of Sunshine common stock outstanding at December 31, 2017		7,922,479
Per share exchange ratio	0.89
Number of shares of CenterState common stock less 361 of fractional shares		7,050,645
CenterState common stock price per share on December 29, 2017	$	25.73
Fair value of CenterState common stock issued	$	181,413
Cash consideration paid for 361 of fractional shares		7
Total consideration to be paid to Sunshine common shareholders	$	181,420
Fair value of Sunshine stock options converted to CenterState stock options		6,432
Total Purchase Price for Sunshine	$	187,852

Summary of Fair Value of Assets Purchased, Including Goodwill and Liabilities Assumed

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the January 1, 2018 purchase date.

	January 1, 2018
Assets:
Cash and cash equivalents	$	47,056
Loans, held for investment		676,090
Purchased credit impaired loans		8,232
Loans held for sale		430
Investments		93,006
Accrued interest receivable		2,170
Branch real estate		9,375
Furniture and fixtures		916
Bank property held for sale		9,503
FHLB stock		4,875
Bank owned life insurance		23,101
Core deposit intangible		8,525
Goodwill		114,228
Deferred tax asset		11,670
Other assets		6,135
Total assets acquired	$	1,015,312
Liabilities:
Deposits	$	719,039
Federal Home Loan Bank advances		95,001
Securities sold under agreement to repurchase		353
Subordinated notes		11,000
Accrued interest payable		457
Other liabilities		1,610
Total liabilities assumed	$	827,460

Summary of Contractually Required Principal and Interest Cash Payments for Purchased Credit Impaired Loans

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of January 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	21,598
Non-accretable difference		(12,213	)
Cash flows expected to be collected		9,385
Accretable yield		(1,153	)
Total purchased credit-impaired loans acquired	$	8,232

Summary of Fair Value of Acquired Loans and Unpaid Principal Balance

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	148,342	$	146,057
Commercial real estate		375,377		371,323
Construction/development/land		58,530		57,331
Commercial loans		104,811		99,650
Consumer and other loans		1,770		1,729
Purchased credit-impaired		18,149		8,232
Total earning assets	$	706,979	$	684,322

HCBF Holding Company, Inc. [Member]

Summary of Purchase Price Calculation

The table below summarizes the purchase price calculation.

Number of shares of Harbor common stock outstanding at December 31, 2017		22,299,082
Per share exchange ratio		0.675
Number of shares of CenterState common stock less 241 of fractional shares		15,051,639
CenterState common stock price per share on December 29, 2017	$	25.73
Fair value of CenterState common stock issued	$	387,279
Number of shares of Harbor common stock outstanding at December 31, 2017		22,299,082
Cash consideration each Harbor share is entitled to receive	$	1.925
Total Cash Consideration plus $6 for 241 of fractional shares	$	42,932
Total Stock Consideration	$	387,279
Total Cash Consideration		42,932
Total consideration to be paid to Harbor common shareholders	$	430,211
Fair value of Harbor stock options converted to CenterState stock options	$	18,025
Total Purchase Price for Harbor	$	448,236

Summary of Fair Value of Assets Purchased, Including Goodwill and Liabilities Assumed

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the January 1, 2018 purchase date.

	January 1, 2018
Assets:
Cash and cash equivalents	$	77,176
Loans, held for investment		1,290,004
Purchased credit impaired loans		36,031
Loans held for sale		5,694
Investments		585,297
Accrued interest receivable		5,847
Branch real estate		34,035
Furniture and fixtures		3,571
Bank property held for sale		14,140
FHLB and other stock		9,488
Bank owned life insurance		39,089
Other real estate owned		5,144
Core deposit intangible		23,625
Goodwill		233,321
Deferred tax asset		14,071
Other assets		2,536
Total assets acquired	$	2,379,069
Liabilities:
Deposits	$	1,755,155
Federal Home Loan Bank advances		157,919
Corporate debentures		5,872
Accrued interest payable		478
Other liabilities		11,409
Total liabilities assumed	$	1,930,833

Summary of Contractually Required Principal and Interest Cash Payments for Purchased Credit Impaired Loans

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of January 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	67,107
Non-accretable difference		(25,951	)
Cash flows expected to be collected		41,156
Accretable yield		(5,125	)
Total purchased credit-impaired loans acquired	$	36,031

Summary of Fair Value of Acquired Loans and Unpaid Principal Balance

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	370,611	$	363,559
Commercial real estate		636,517		627,900
Construction/development/land		149,547		146,639
Commercial loans		113,818		110,630
Consumer and other loans		41,660		41,276
Purchased credit-impaired		54,320		36,031
Total earning assets	$	1,366,473	$	1,326,035

Charter Financial Corporation [Member]

Summary of Purchase Price Calculation

The table below summarizes the purchase price calculation.

Number of shares of Charter common stock outstanding at August 31, 2018		15,480,776
Per share exchange ratio		0.738
Number of shares of CenterState common stock less 599 of fractional shares		11,424,214
CenterState common stock price per share on August 31, 2018	$	30.62
Fair value of CenterState common stock issued	$	349,809
Number of shares of Charter common stock outstanding at August 31, 2018		15,480,776
Cash consideration each Charter share is entitled to receive	$	2.300
Total Cash Consideration plus $17 for 599 of fractional shares	$	35,624
Total Stock Consideration	$	349,809
Total Cash Consideration		35,624
Total consideration to be paid to Charter common shareholders	$	385,433
Cash out of Charter stock options		4,043
Total Purchase Price for Charter	$	389,476

Summary of Fair Value of Assets Purchased, Including Goodwill and Liabilities Assumed

The list below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the September 1, 2018 purchase date.

	September 1, 2018
Assets:
Cash and cash equivalents	$	184,020
Loans, held for investment		1,130,240
Purchased credit impaired loans		11,432
Loans held for sale		2,835
Investments		73,808
Accrued interest receivable		3,684
Branch real estate		27,930
Furniture and fixtures		1,988
Bank property held for sale		1,695
FHLB and other stock		1,483
Bank owned life insurance		54,813
Other real estate owned		257
Core deposit intangible		19,795
Goodwill		197,648
Deferred tax asset		1,966
Other assets		20,947
Total assets acquired	$	1,734,541
Liabilities:
Deposits	$	1,321,970
Corporate debentures		9,000
Accrued interest payable		1,015
Other liabilities		13,080
Total liabilities assumed	$	1,345,065

Summary of Contractually Required Principal and Interest Cash Payments for Purchased Credit Impaired Loans

The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of September 1, 2018 for purchased credit impaired loans. Contractually required principal and interest payments have been adjusted for estimated prepayments.

Contractually required principal and interest	$	33,687
Non-accretable difference		(20,763	)
Cash flows expected to be collected		12,924
Accretable yield		(1,492	)
Total purchased credit-impaired loans acquired	$	11,432

Summary of Fair Value of Acquired Loans and Unpaid Principal Balance

The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date.

	Book		Fair
	Balance		Value
Loans:
Single family residential real estate	$	284,505	$	280,200
Commercial real estate		567,506		557,730
Construction/development/land		181,128		178,687
Commercial loans		88,308		87,062
Consumer and other loans		26,221		26,561
Purchased credit-impaired		17,122		11,432
Total earning assets	$	1,164,790	$	1,141,672

XML

Interest Rate Swap Derivatives (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summary Information about the Interest Rate Swap Derivative Instruments

Summary information about the interest rate swap derivative instruments is as follows:

	Sep. 30, 2018			Dec. 31, 2017
Notional amount	$	5,044,615		$	3,740,430
Weighted average pay rate on interest-rate swaps		3.49	%		3.00	%
Weighted average receive rate on interest rate swaps		3.48	%		3.00	%
Weighted average maturity (years)		11			11
Fair value of interest rate swap derivatives (asset)	$	87,946		$	42,480
Fair value of interest rate swap derivatives (liability)	$	88,065		$	43,259

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Common Stock Outstanding and Earnings Per Share Data - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Anti dilutive stock options	0	0	0	0

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Common Stock Outstanding and Earnings Per Share Data - Factors Used in Earnings Per Share Computations (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic
Net income available to common shareholders		$ 37,985	$ 22,050	$ 105,784	$ 53,883
Less: Earnings allocated to participating securities		(28)	(46)	(84)	(121)
Net income allocated to common shareholders		$ 37,957	$ 22,004	$ 105,700	$ 53,762
Weighted average common shares outstanding including participating securities		87,881,806	60,032,804	85,026,929	56,442,506
Less: Participating securities	[1]	(68,135)	(126,194)	(68,652)	(126,806)
Average shares	[2]	87,813,671	59,906,610	84,958,277	56,315,700
Basic earnings per common share		$ 0.43	$ 0.37	$ 1.24	$ 0.95
Diluted
Net income available to common shareholders		$ 37,957	$ 22,004	$ 105,700	$ 53,762
Weighted average common shares outstanding for basic earnings per common share	[2]	87,813,671	59,906,610	84,958,277	56,315,700
Add: Dilutive effects of stock based compensation awards		997,031	1,208,395	1,251,432	1,014,567
Average shares and dilutive potential common shares	[2]	88,810,702	61,115,005	86,209,709	57,330,267
Diluted earnings per common share		$ 0.43	$ 0.36	$ 1.23	$ 0.94

[1] Participating securities are restricted stock awards whereby the stock certificates have been issued, are included in outstanding shares, receive dividends and can be voted, but have not vested.

[2] Excludes participating shares.

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Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Trading securities, at fair value		$ 6,777
Available for sale securities	$ 1,536,842	1,060,143
Loans held for sale, at fair value, carrying amount	39,554	19,647
Mortgage banking derivatives, carrying amount assets	938
Interest rate swap derivatives, carrying amount assets	87,946	42,480
Liabilities:
Mortgage banking derivatives, carrying amount liability	27
Interest rate swap derivatives, carrying amount liability	88,065	43,259
Mortgage Backed Securities [Member]
Assets:
Available for sale securities	1,412,459	972,611
Municipal Securities [Member]
Assets:
Available for sale securities	78,378	72,758
U.S. Treasury Securities [Member]
Assets:
Available for sale securities		5,200
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Trading securities, at fair value		6,777
Available for sale securities	1,536,842	1,060,143
Fair Value Measurements on Recurring [Member] | Carrying value [Member]
Assets:
Trading securities, at fair value		6,777
Loans held for sale, at fair value, carrying amount	39,554
Mortgage banking derivatives, carrying amount assets	938
Interest rate swap derivatives, carrying amount assets	87,946	42,480
Liabilities:
Mortgage banking derivatives, carrying amount liability	27
Interest rate swap derivatives, carrying amount liability	88,065	43,259
Fair Value Measurements on Recurring [Member] | Carrying value [Member] | Corporate Debt Securities [Member]
Assets:
Available for sale securities	6,361
Fair Value Measurements on Recurring [Member] | Carrying value [Member] | Obligations of U.S. Government Sponsored Entities and Agencies [Member]
Assets:
Available for sale securities	39,644	9,574
Fair Value Measurements on Recurring [Member] | Carrying value [Member] | Mortgage Backed Securities [Member]
Assets:
Available for sale securities	1,412,459	972,611
Fair Value Measurements on Recurring [Member] | Carrying value [Member] | Municipal Securities [Member]
Assets:
Available for sale securities	78,378	72,758
Fair Value Measurements on Recurring [Member] | Carrying value [Member] | U.S. Treasury Securities [Member]
Assets:
Available for sale securities		5,200
Fair Value Measurements on Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Trading securities, at fair value		6,777
Loans held for sale, at fair value, carrying amount	39,554
Interest rate swap derivatives, carrying amount assets	87,946	42,480
Liabilities:
Interest rate swap derivatives, carrying amount liability	88,065	43,259
Fair Value Measurements on Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member]
Assets:
Available for sale securities	6,361
Fair Value Measurements on Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Obligations of U.S. Government Sponsored Entities and Agencies [Member]
Assets:
Available for sale securities	39,644	9,574
Fair Value Measurements on Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage Backed Securities [Member]
Assets:
Available for sale securities	1,412,459	972,611
Fair Value Measurements on Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Municipal Securities [Member]
Assets:
Available for sale securities	78,378	72,758
Fair Value Measurements on Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury Securities [Member]
Assets:
Available for sale securities		$ 5,200
Fair Value Measurements on Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Mortgage banking derivatives, carrying amount assets	938
Liabilities:
Mortgage banking derivatives, carrying amount liability	$ 27

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Fair Value - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans with allocated allowance for loan losses	$ 10,102		$ 10,102		$ 11,673
Impaired valuation allowance	1,195		1,195		$ 477
Provision for loan loss expense on impaired loans	1,950	$ 1,096	6,183	$ 3,990
Repossessed real estate owned valuation write down	170	141	464	612
Impairment on bank property held for sale	247	0	2,587	507
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Provision for loan loss expense on impaired loans	$ 682	$ 384	$ 1,026	$ 779
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rates to determine fair value of collateral	7.00%		7.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rates to determine fair value of collateral	10.00%		10.00%

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Fair Value - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value Measurements on Non-Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans on Residential real estate at Carrying value	$ 2,312	$ 2,423
Impaired loans on Commercial real estate at Carrying value	5,350	6,293
Impaired loans on Land, land development and construction at Carrying value	942	292
Impaired loans on Commercial at Carrying value	251	2,131
Impaired loans on Consumer at Carrying value	52	57
Other real estate owned on Residential real estate at Carrying value	117	635
Other real estate owned on Commercial real estate at Carrying value	261	261
Other real estate owned on Land, land development and construction at Carrying value	1,312	1,481
Bank owned real estate held for sale	5,805	1,516
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bank owned real estate held for sale	5,805	1,516
Impaired loans on Residential real estate	2,312	2,423
Impaired loans on Commercial real estate	5,350	6,293
Impaired loans on Land, land development and construction	942	292
Impaired loans on Commercial	251	2,131
Impaired loans on Consumer	52	57
Other real estate owned on Residential real estate	117	635
Other real estate owned on Commercial real estate	261	261
Other real estate owned on Land, land development and construction	$ 1,312	$ 1,481

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Fair Value - Carrying Amounts and Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Financial assets:
Cash and cash equivalents	$ 606,331		$ 280,619
Cash and cash equivalents, fair value	606,331		280,619
Trading securities, at fair value			6,777
Investment securities available for sale, at fair value	1,536,842		1,060,143
Investment securities held to maturity, carrying amount	219,850		232,399
Investment securities held to maturity, at fair value	211,262		231,615
Federal Home Loan Bank, Federal Reserve Bank and other stock, at cost	70,311		34,876
Loans held for sale, at fair value, carrying amount	39,554		19,647
Loans held for sale, fair value	39,554	$ 36,366	19,647	$ 12,243	$ 8,959	$ 2,285
Loans, net, carrying amount	8,184,281		4,740,396
Loans, net, fair value	8,125,840		4,731,514
Mortgage banking derivatives, carrying amount assets	938
Interest rate swap derivatives, carrying amount assets	87,946		42,480
Interest rate swap derivatives, assets fair value	87,946		42,480
Accrued interest receivable, carrying amount	32,972		18,628
Accrued interest receivable, fair value	32,972		18,628
Mortgage banking derivatives, assets fair value	938
Financial liabilities:
Deposits- without stated maturities, carrying amount	7,612,238		4,727,840
Deposits- without stated maturities, fair value	7,612,238		4,727,840
Deposits- with stated maturities, carrying amount	1,862,288		832,683
Deposits- with stated maturities, fair value	1,867,827		845,039
Securities sold under agreement to repurchase, fair value	51,311		52,080
Securities sold under agreement to repurchase	51,311		52,080
Federal funds purchased and other borrowings, carrying amount	643,002		506,490
Corporate debentures, carrying amount	41,328		26,192
Federal funds purchased and other borrowings, fair value	643,002		506,490
Mortgage banking derivatives, carrying amount liability	27
Interest rate swap derivatives, carrying amount	88,065		43,259
Corporate debentures, fair value	37,928		22,363
Accrued interest payable, carrying amount	2,570		1,169
Interest rate swap derivatives, fair value	88,065		43,259
Accrued interest payable, fair value	2,570		1,169
Mortgage banking derivatives, liability fair value	27
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets:
Cash and cash equivalents, fair value	606,331		280,619
Financial liabilities:
Deposits- without stated maturities, fair value	7,612,238		4,727,840
Significant Other Observable Inputs (Level 2) [Member]
Financial assets:
Trading securities, at fair value			6,777
Investment securities available for sale, at fair value	1,536,842		1,060,143
Investment securities held to maturity, at fair value	211,262		231,615
Loans held for sale, fair value	39,554		19,647
Interest rate swap derivatives, assets fair value	87,946		42,480
Accrued interest receivable, fair value	6,798		5,370
Financial liabilities:
Deposits- with stated maturities, fair value	1,867,827		845,039
Securities sold under agreement to repurchase, fair value	51,311		52,080
Federal funds purchased and other borrowings, fair value	643,002		506,490
Interest rate swap derivatives, fair value	88,065		43,259
Accrued interest payable, fair value	2,570		1,169
Significant Unobservable Inputs (Level 3) [Member]
Financial assets:
Loans, net, fair value	8,125,840		4,731,514
Accrued interest receivable, fair value	26,174		13,258
Mortgage banking derivatives, assets fair value	938
Financial liabilities:
Corporate debentures, fair value	37,928		$ 22,363
Mortgage banking derivatives, liability fair value	$ 27

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Reportable Segments - Reconciliation of Reportable Segment Revenues, Expenses and Profit (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Interest income	$ 114,663	$ 67,057	$ 328,451	$ 182,904
Interest expense	(12,810)	(4,471)	(31,051)	(10,980)
Net interest income	101,853	62,586	297,400	171,924
Provision for loan losses	(1,950)	(1,096)	(6,183)	(3,990)
Non interest income	27,104	16,741	72,731	48,217
Non interest expense	(77,339)	(44,622)	(232,947)	(137,474)
Income before provision for income taxes	49,668	33,609	131,001	78,677
Income tax (provision) benefit	(11,683)	(11,559)	(25,217)	(24,794)
Net income	37,985	22,050	105,784	53,883
Total assets	12,274,365	6,822,861	12,274,365	6,822,861	$ 7,123,975
Operating Segments [Member] | Commercial and Retail Banking [Member]
Segment Reporting Information [Line Items]
Interest income	110,764	64,410	317,851	175,015
Interest expense	(9,992)	(3,305)	(23,689)	(7,934)
Net interest income	100,772	61,105	294,162	167,081
Provision for loan losses	(1,965)	(1,113)	(6,039)	(4,073)
Non interest income	18,808	9,528	49,228	26,493
Non interest expense	(70,652)	(38,432)	(213,934)	(119,304)
Income before provision for income taxes	46,963	31,088	123,417	70,197
Income tax (provision) benefit	(11,086)	(10,579)	(28,585)	(22,900)
Net income	35,877	20,509	94,832	47,297
Total assets	11,604,329	6,319,532	11,604,329	6,319,532
Operating Segments [Member] | Correspondent Banking And Capital Markets Division [Member]
Segment Reporting Information [Line Items]
Interest income	3,899	2,647	10,600	7,889
Interest expense	(2,005)	(819)	(4,734)	(2,048)
Net interest income	1,894	1,828	5,866	5,841
Provision for loan losses	15	17	(144)	83
Non interest income	8,296	7,213	23,495	21,724
Non interest expense	(5,678)	(5,304)	(16,172)	(15,594)
Income before provision for income taxes	4,527	3,754	13,045	12,054
Income tax (provision) benefit	(1,147)	(1,448)	(3,305)	(4,649)
Net income	3,380	2,306	9,740	7,405
Total assets	661,880	498,669	661,880	498,669
Corporate Overhead and Administration [Member]
Segment Reporting Information [Line Items]
Interest expense	(813)	(347)	(2,628)	(998)
Net interest income	(813)	(347)	(2,628)	(998)
Non interest income			8
Non interest expense	(1,009)	(886)	(2,841)	(2,576)
Income before provision for income taxes	(1,822)	(1,233)	(5,461)	(3,574)
Income tax (provision) benefit	550	468	6,673	2,755
Net income	(1,272)	(765)	1,212	(819)
Total assets	1,969,635	940,571	1,969,635	940,571
Elimination Entries [Member]
Segment Reporting Information [Line Items]
Total assets	$ (1,961,479)	$ (935,911)	$ (1,961,479)	$ (935,911)

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Investment Securities Available for Sale - Fair Value of Available for Sale Securities and Related Gross Unrealized Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,587,074	$ 1,069,526
Gross Unrealized Gains	307	1,815
Gross Unrealized Losses	50,539	11,198
Fair Value	1,536,842	1,060,143
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,460,552	982,565
Gross Unrealized Gains	54	752
Gross Unrealized Losses	48,147	10,706
Fair Value	1,412,459	972,611
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	79,375	71,961
Gross Unrealized Gains	151	863
Gross Unrealized Losses	1,148	66
Fair Value	78,378	72,758
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		5,000
Gross Unrealized Gains		200
Gross Unrealized Losses		0
Fair Value		5,200
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,265
Gross Unrealized Gains	96
Gross Unrealized Losses	0
Fair Value	6,361
Obligations of U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	40,882	10,000
Gross Unrealized Gains	6	0
Gross Unrealized Losses	1,244	426
Fair Value	$ 39,644	$ 9,574

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Investment Securities Available for Sale - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Security	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) Security
Schedule of Available-for-sale Securities [Line Items]
Tax provision related to net realized gains	$ 0	$ 0	$ (6,000)	$ 0
Securities estimated fair value	$ 884,542,000		$ 884,542,000		$ 255,788,000
Debt securities, held-to-maturity, restricted [extensible list]	us-gaap:CollateralPledgedMember		us-gaap:CollateralPledgedMember		us-gaap:CollateralPledgedMember
Percentage of AFS securities held by any one issuer as a percentage of stockholders' equity	10.00%		10.00%		10.00%
Number of securities representing specified criteria | Security			0		0
Percentage of mortgage-backed securities held from U.S. government-sponsored entities and agencies	100.00%		100.00%
Sunshine Bancorp, Inc. [Member]
Schedule of Available-for-sale Securities [Line Items]
Gain (loss) on sale of securities acquired through acquisition			$ 0
HCBF Holding Company, Inc. [Member]
Schedule of Available-for-sale Securities [Line Items]
Gain (loss) on sale of securities acquired through acquisition			$ 0

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Investment Securities Available for Sale - Schedule of Sales of Available for Sale Securities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Investments Debt And Equity Securities [Abstract]
Proceeds	$ 364,152	$ 260,824
Gross gains	68	0
Gross losses	$ 90	$ 0

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Investment Securities Available for Sale - Fair Value and Amortized Cost of Investment Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
Investment securities available for sale, Due one year or less, Amortized Cost	$ 781
Investment securities available for sale, Due after one year through five years, Amortized Cost	5,502
Investment securities available for sale, Due after five years through ten years, Amortized Cost	30,535
Investment securities available for sale, Due after ten years through thirty years, Amortized Cost	89,704
Investment securities available for sale, Mortgage backed securities, Amortized Cost	1,460,552
Amortized Cost	1,587,074	$ 1,069,526
Investment securities available for sale, Due one or less, Fair Value	782
Investment securities available for sale, Due after one year through five years, Fair Value	5,537
Investment securities available for sale, Due after five years through ten years, Fair Value	29,657
Investment securities available for sale, Due after ten years through thirty years, Fair Value	88,407
Investment securities available for sale, Mortgage backed securities, Fair Value	1,412,459
Fair Value	$ 1,536,842	$ 1,060,143

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Investment Securities Available for Sale - Investments Gross Unrealized Losses and Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 1,144,947	$ 489,623
Less than 12 months, Unrealized Losses	30,546	3,364
12 months or more, Fair Value	369,213	325,640
12 months or more, Unrealized Losses	19,993	7,834
Total, Fair Value	1,514,160	815,263
Total, Unrealized Losses	50,539	11,198
Obligations of U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	27,193	0
Less than 12 months, Unrealized Losses	352	0
12 months or more, Fair Value	9,108	9,574
12 months or more, Unrealized Losses	892	426
Total, Fair Value	36,301	9,574
Total, Unrealized Losses	1,244	426
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	1,047,726	477,925
Less than 12 months, Unrealized Losses	29,046	3,298
12 months or more, Fair Value	360,105	316,066
12 months or more, Unrealized Losses	19,101	7,408
Total, Fair Value	1,407,831	793,991
Total, Unrealized Losses	48,147	10,706
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	70,028	11,698
Less than 12 months, Unrealized Losses	1,148	66
12 months or more, Fair Value	0	0
12 months or more, Unrealized Losses	0	0
Total, Fair Value	70,028	11,698
Total, Unrealized Losses	$ 1,148	$ 66

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Investment Securities Held to Maturity - Fair Value of Held to Maturity Securities and Related Gross Unrecognized Gains and Losses (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 219,850	$ 232,399
Gross Unrecognized Gains	410	1,781
Gross Unrecognized Losses	8,998	2,565
Held-to-maturity securities, fair value	211,262	231,615
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	87,872	100,039
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	3,627	1,068
Held-to-maturity securities, fair value	84,245	98,971
Municipal Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	131,978	132,360
Gross Unrecognized Gains	410	1,781
Gross Unrecognized Losses	5,371	1,497
Held-to-maturity securities, fair value	$ 127,017	$ 132,644

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Investment Securities Held to Maturity - Additional Information (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) Security	Dec. 31, 2017 USD ($) Security
Schedule of Held-to-maturity Securities [Line Items]
Number of securities representing specified criteria	0	0
Percentage of HTM securities held by any one issuer as a percentage of stockholders' equity	10.00%
Held to maturity securities pledged, carrying amount | $	$ 104,650	$ 97,389
Debt securities, available-for-sale, restriction type [extensible list]	us-gaap:CollateralPledgedMember	us-gaap:CollateralPledgedMember
Percentage of mortgage-backed securities held from U.S. government-sponsored entities and agencies	100.00%
Held-to-maturity Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Number of securities representing specified criteria	0
Percentage of mortgage-backed securities held from U.S. government-sponsored entities and agencies	100.00%

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Investment Securities Held to Maturity - Fair Value and Amortized Cost of Investment Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Investments Debt And Equity Securities [Abstract]
Investment securities held-to-maturity, Due after five years through ten years, Fair Value	$ 2,039
Investment securities held-to-maturity, Due after ten years through thirty years, Fair Value	124,978
Investment securities held-to-maturity, Mortgage backed securities, Fair Value	84,245
Investment securities held-to- maturity, Fair Value	211,262	$ 231,615
Investment securities held-to-maturity, Due after five years through ten years, Amortized Cost	2,048
Investment securities held-to-maturity, Due after ten years through thirty years, Amortized Cost	129,930
Investment securities held-to-maturity, Mortgage backed securities, Amortized Cost	87,872
Amortized Cost	$ 219,850	$ 232,399

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Investment Securities Held to Maturity - Investments Gross Unrecognized Losses and Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	$ 80,453	$ 70,616
Less than 12 months, Unrecognized Losses	2,482	637
12 months or more, Fair Value	98,882	79,668
12 months or more, Unrealized Losses	6,516	1,928
Total, Fair Value	179,335	150,284
Total, Unrecognized Losses	8,998	2,565
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	22,791	57,266
Less than 12 months, Unrecognized Losses	924	451
12 months or more, Fair Value	61,454	41,705
12 months or more, Unrealized Losses	2,703	617
Total, Fair Value	84,245	98,971
Total, Unrecognized Losses	3,627	1,068
Municipal Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	57,662	13,350
Less than 12 months, Unrecognized Losses	1,558	186
12 months or more, Fair Value	37,428	37,963
12 months or more, Unrealized Losses	3,813	1,311
Total, Fair Value	95,090	51,313
Total, Unrecognized Losses	$ 5,371	$ 1,497

XML

Loans - Summary of Information Concerning Loan Portfolio by Collateral Types (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Receivables with Imputed Interest [Line Items]
Total loans excluding purchased credit impaired loans	$ 8,055,421	$ 4,609,063
Total PCI loans	167,671	164,158
Total loans	8,223,092	4,773,221
Allowance for loan losses for loans that are not PCI loans	(38,595)	(32,530)
Net Loans	8,184,281	4,740,396
Allowance for loan losses for loans that are not PCI loans [Member]
Receivables with Imputed Interest [Line Items]
Real estate loans, Residential	1,713,093	1,025,303
Real estate loans, Commercial	4,395,351	2,546,143
Land, development and construction	645,885	235,816
Total real estate	6,754,329	3,807,262
Commercial	1,104,392	693,501
Consumer and other loans	194,603	107,480
Loans before unearned fees and deferred cost	8,053,324	4,608,243
Net unearned fees and costs	2,097	820
Allowance for loan losses on PCI loans [Member]
Receivables with Imputed Interest [Line Items]
Real estate loans, Residential	62,507	59,975
Real estate loans, Commercial	92,444	92,791
Land, development and construction	6,955	6,656
Total real estate	161,906	159,422
Commercial	5,479	4,444
Consumer and other loans	286	292
Allowance for loan losses for PCI loans	$ (216)	$ (295)

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Loans - Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolios (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 37,484	$ 30,132	$ 32,825	$ 27,041
Loans charged-off	(1,178)	(472)	(2,170)	(1,722)
Recoveries of loans previously charged-off	555	1,072	1,973	2,519
Net (charge-offs) recoveries	(623)	600	(197)	797
Provision for loan losses	1,950	1,096	6,183	3,990
Balance at end of period	38,811	31,828	38,811	31,828
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			6,003
Balance at end of period	5,852		5,852
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			19,363
Balance at end of period	22,950		22,950
Land, Development, Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			1,401
Balance at end of period	1,792		1,792
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			4,130
Balance at end of period	5,641		5,641
Consumer and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			1,928
Balance at end of period	2,576		2,576
Allowance for loan losses for loans that are not PCI loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	37,209	29,769	32,530	26,569
Loans charged-off	(1,178)	(472)	(2,170)	(1,722)
Recoveries of loans previously charged-off	555	1,072	1,898	2,454
Net (charge-offs) recoveries	(623)	600	(272)	732
Provision for loan losses	2,009	1,174	6,337	4,242
Balance at end of period	38,595	31,543	38,595	31,543
Allowance for loan losses for loans that are not PCI loans [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	5,847	6,134	6,003	5,640
Loans charged-off	(283)	(108)	(419)	(250)
Recoveries of loans previously charged-off	217	290	855	816
Provision for loan losses	71	(292)	(587)	(182)
Balance at end of period	5,852	6,024	5,852	6,024
Allowance for loan losses for loans that are not PCI loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	21,921	17,238	19,304	14,713
Loans charged-off		(8)		(72)
Recoveries of loans previously charged-off	113	320	569	626
Provision for loan losses	916	1,074	3,077	3,357
Balance at end of period	22,950	18,624	22,950	18,624
Allowance for loan losses for loans that are not PCI loans [Member] | Land, Development, Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	1,629	1,175	1,179	883
Loans charged-off	(62)		(62)
Recoveries of loans previously charged-off	2	353	3	596
Provision for loan losses	21	(393)	470	(344)
Balance at end of period	1,590	1,135	1,590	1,135
Allowance for loan losses for loans that are not PCI loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	5,412	3,590	4,130	3,785
Loans charged-off	(327)	(140)	(555)	(677)
Recoveries of loans previously charged-off	152	82	214	254
Provision for loan losses	404	458	1,852	628
Balance at end of period	5,641	3,990	5,641	3,990
Allowance for loan losses for loans that are not PCI loans [Member] | Consumer and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	2,400	1,632	1,914	1,548
Loans charged-off	(506)	(216)	(1,134)	(723)
Recoveries of loans previously charged-off	71	27	257	162
Provision for loan losses	597	327	1,525	783
Balance at end of period	2,562	1,770	2,562	1,770
Allowance for loan losses on PCI loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	275	363	295	472
Recoveries of loans previously charged-off			75	65
Net (charge-offs) recoveries			75	65
Provision for loan losses	(59)	(78)	(154)	(252)
Balance at end of period	216	285	216	285
Allowance for loan losses on PCI loans [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		50		54
Provision for loan losses		(50)		(54)
Allowance for loan losses on PCI loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	59	123	59	92
Recoveries of loans previously charged-off				65
Provision for loan losses	(59)	(65)	(59)	(99)
Balance at end of period		58		58
Allowance for loan losses on PCI loans [Member] | Land, Development, Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	202	176	222	312
Provision for loan losses		37	(20)	(99)
Balance at end of period	202	213	202	213
Allowance for loan losses on PCI loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recoveries of loans previously charged-off			75
Provision for loan losses			(75)
Allowance for loan losses on PCI loans [Member] | Consumer and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	14	14	14	14
Balance at end of period	$ 14	$ 14	$ 14	$ 14

XML

Loans - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Allowance for loan losses:
Individually evaluated for impairment	$ 1,413		$ 804
Collectively evaluated for impairment	37,182		31,726
Purchased credit impaired	216		295
Total ending allowance balance	38,811	$ 37,484	32,825	$ 31,828	$ 30,132	$ 27,041
Loans:
Individually evaluated for impairment	17,168		20,345
Collectively evaluated for impairment	8,036,156		4,587,898
Purchased credit impaired	167,671		164,158
Total ending loan balances	8,220,995		4,772,401
Residential Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	417		586
Collectively evaluated for impairment	5,435		5,417
Total ending allowance balance	5,852		6,003
Loans:
Individually evaluated for impairment	7,055		8,101
Collectively evaluated for impairment	1,706,038		1,017,202
Purchased credit impaired	62,507		59,975
Total ending loan balances	1,775,600		1,085,278
Commercial Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	445
Collectively evaluated for impairment	22,505		19,304
Purchased credit impaired			59
Total ending allowance balance	22,950		19,363
Loans:
Individually evaluated for impairment	7,686		8,218
Collectively evaluated for impairment	4,387,665		2,537,925
Purchased credit impaired	92,444		92,791
Total ending loan balances	4,487,795		2,638,934
Land, Development, Construction [Member]
Allowance for loan losses:
Individually evaluated for impairment			4
Collectively evaluated for impairment	1,590		1,175
Purchased credit impaired	202		222
Total ending allowance balance	1,792		1,401
Loans:
Individually evaluated for impairment	971		331
Collectively evaluated for impairment	644,914		235,485
Purchased credit impaired	6,955		6,656
Total ending loan balances	652,840		242,472
Commercial and Industrial [Member]
Allowance for loan losses:
Individually evaluated for impairment	546		206
Collectively evaluated for impairment	5,095		3,924
Total ending allowance balance	5,641		4,130
Loans:
Individually evaluated for impairment	1,292		3,497
Collectively evaluated for impairment	1,103,100		690,004
Purchased credit impaired	5,479		4,444
Total ending loan balances	1,109,871		697,945
Consumer and Other [Member]
Allowance for loan losses:
Individually evaluated for impairment	5		8
Collectively evaluated for impairment	2,557		1,906
Purchased credit impaired	14		14
Total ending allowance balance	2,576		1,928
Loans:
Individually evaluated for impairment	164		198
Collectively evaluated for impairment	194,439		107,282
Purchased credit impaired	286		292
Total ending loan balances	$ 194,889		$ 107,772

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Loans - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Mortgage Loans On Real Estate [Line Items]
Total TDRs (these are included in impaired loans)	$ 10,488	$ 12,779
Impaired loans that are not TDRs	6,680	7,566
Total impaired loans	17,168	20,345
Performing TDRs [Member]
Mortgage Loans On Real Estate [Line Items]
Total TDRs (these are included in impaired loans)	9,204	12,081
Nonperforming TDRs [Member]
Mortgage Loans On Real Estate [Line Items]
Total TDRs (these are included in impaired loans)	$ 1,284	$ 698

XML

Loans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Receivables [Abstract]
Loans modification, modified terms allowance period minimum			12 months
Loans modification, modified terms allowance period maximum			24 months
Provision for loan loss expense	$ 54	$ 20	$ 82	$ 264
Partial charge offs for troubled debt restructured	11	13	$ 32	55
Percentage of troubled debt restructured current pursuant to modified terms			88.00%
Non performing TDRs	1,284		$ 1,284
Percentage of troubled debt restructured not performing pursuant to their modified terms			12.00%
Loans modified as TDRs	616	85	$ 1,838	784
Loan loss provision modified as TDRs	16	0	33	8
Provision for loan loss expense within twelve months	18	8	24	24
Partial charge offs for troubled debt restructured	5	8	10	24
Reclassification from non-accretable difference	$ 4,529	$ 2,286	$ 8,443	$ 8,364

XML

Loans - Troubled Debt Restructured Loans by Loans Type (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
TDRs	$ 10,488	$ 12,779
Total Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
TDRs	9,719	12,025
Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	9,204	12,081
Accruing [Member] | Total Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
TDRs	8,461	11,355
Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	1,284	698
Non Accrual [Member] | Total Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
TDRs	1,258	670
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs	7,055	8,101
Residential Real Estate [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	6,525	7,737
Residential Real Estate [Member] | Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	530	364
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs	2,542	3,592
Commercial Real Estate [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	1,855	3,286
Commercial Real Estate [Member] | Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	687	306
Land, Development, Construction [Member]
Financing Receivable, Modifications [Line Items]
TDRs	122	332
Land, Development, Construction [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	81	332
Land, Development, Construction [Member] | Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	41
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
TDRs	605	556
Commercial and Industrial [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	605	556
Consumer and Other [Member]
Financing Receivable, Modifications [Line Items]
TDRs	164	198
Consumer and Other [Member] | Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	138	170
Consumer and Other [Member] | Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	$ 26	$ 28

XML

Loans - Summary of Loans by Class Modified (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) SecurityLoan	Sep. 30, 2017 USD ($) SecurityLoan
Mortgage Loans On Real Estate [Line Items]
Number of loans | SecurityLoan	2	3
Recorded investment | $	$ 307	$ 688
Residential Real Estate [Member]
Mortgage Loans On Real Estate [Line Items]
Number of loans | SecurityLoan	1	1
Recorded investment | $	$ 191	$ 72
Commercial Real Estate [Member]
Mortgage Loans On Real Estate [Line Items]
Number of loans | SecurityLoan	1	2
Recorded investment | $	$ 116	$ 616

XML

Loans - Summary of Loans Individually Evaluated for Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 18,073	$ 21,869
Total impaired loans	17,168	20,345
Amount of allowance for loan losses allocated to impaired loans	1,413	804
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	4,105	4,945
Unpaid principal balance, With an allowance recorded	3,235	3,426
Recorded investment, With no related allowance	3,977	4,818
Recorded investment, With an allowance recorded	3,078	3,283
Total impaired loans	7,055	8,101
Amount of allowance for loan losses allocated to impaired loans	417	586
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	6,634	8,973
Unpaid principal balance, With an allowance recorded	1,600
Recorded investment, With no related allowance	6,090	8,218
Recorded investment, With an allowance recorded	1,596
Total impaired loans	7,686	8,218
Amount of allowance for loan losses allocated to impaired loans	445
Land, Development, Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	1,009	260
Unpaid principal balance, With an allowance recorded		140
Recorded investment, With no related allowance	971	210
Recorded investment, With an allowance recorded		121
Total impaired loans	971	331
Amount of allowance for loan losses allocated to impaired loans		4
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	427	3,374
Unpaid principal balance, With an allowance recorded	880	531
Recorded investment, With no related allowance	416	2,968
Recorded investment, With an allowance recorded	876	529
Total impaired loans	1,292	3,497
Amount of allowance for loan losses allocated to impaired loans	546	206
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	111	142
Unpaid principal balance, With an allowance recorded	72	78
Recorded investment, With no related allowance	111	127
Recorded investment, With an allowance recorded	53	71
Total impaired loans	164	198
Amount of allowance for loan losses allocated to impaired loans	$ 5	$ 8

XML

Loans - Summary of Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	$ 17,724	$ 19,200	$ 18,810	$ 19,158
Interest income recognized during impairment	117	120	346	354
Total Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	15,963	17,079	18,216	17,211
Interest income recognized during impairment	106	110	335	324
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	7,328	7,536	15,306	7,767
Interest income recognized during impairment	79	70	308	207
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	7,674	9,200	2,586	8,979
Interest income recognized during impairment	25	35	25	104
Land, Development, Construction [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	961	343	324	465
Interest income recognized during impairment	2	5	2	13
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	1,596	1,859	538	1,702
Interest income recognized during impairment	9	7	9	22
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	165	262	56	245
Interest income recognized during impairment	$ 2	$ 3	$ 2	$ 8

XML

Loans - Summary of Nonperforming Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Non accrual loans	$ 23,450	$ 17,288
Loans past due over 90 days and still accruing interest	0	0
Total non performing loans	$ 23,450	$ 17,288

XML

Loans - Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due Over 90 Days Still on Accrual by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 23,450	$ 17,288
Loans past due over 90 days still accruing	0	0
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	9,234	7,107
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	9,108	6,549
Land, Development, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	2,441	138
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	2,237	3,121
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 430	$ 373

XML

Loans - Summary Aging of Recorded Investment in Past Due Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 8,053,324	$ 4,608,243
Total Past Due	28,390	13,665
Loans Not Past Due	8,001,484	4,577,290
Non accrual loans	23,450	17,288
30 - 59 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16,619	8,572
60 - 89 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,771	5,093
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	1,713,093	1,025,303
Total Past Due	8,188	5,389
Loans Not Past Due	1,695,671	1,012,807
Non accrual loans	9,234	7,107
Residential Real Estate [Member] | 30 - 59 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,011	3,568
Residential Real Estate [Member] | 60 - 89 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,177	1,821
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	4,395,351	2,546,143
Total Past Due	14,463	3,430
Loans Not Past Due	4,371,780	2,536,164
Non accrual loans	9,108	6,549
Commercial Real Estate [Member] | 30 - 59 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,556	1,158
Commercial Real Estate [Member] | 60 - 89 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,907	2,272
Land, Development, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	645,885	235,816
Total Past Due	1,322	2,996
Loans Not Past Due	642,122	232,682
Non accrual loans	2,441	138
Land, Development, Construction [Member] | 30 - 59 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	796	2,807
Land, Development, Construction [Member] | 60 - 89 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	526	189
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	1,104,392	693,501
Total Past Due	3,297	1,331
Loans Not Past Due	1,098,858	689,049
Non accrual loans	2,237	3,121
Commercial and Industrial [Member] | 30 - 59 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,327	568
Commercial and Industrial [Member] | 60 - 89 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	970	763
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	194,603	107,480
Total Past Due	1,120	519
Loans Not Past Due	193,053	106,588
Non accrual loans	430	373
Consumer and Other [Member] | 30 - 59 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	929	471
Consumer and Other [Member] | 60 - 89 days past due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 191	$ 48

XML

Loans - Risk Category of Loans by Class of Loans, Excluding Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,713,093	$ 1,025,303
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	194,603	107,480
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	7,695,117	4,397,611
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,639,770	987,472
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,181,026	2,411,085
Pass [Member] | Land, Development, Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	604,023	217,555
Pass [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,076,627	674,764
Pass [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	193,671	106,735
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	275,071	168,401
Special Mention [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	46,373	20,435
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	167,606	115,942
Special Mention [Member] | Land, Development, Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	36,933	17,699
Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	23,896	14,186
Special Mention [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	263	139
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	83,136	42,231
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	26,950	17,396
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	46,719	19,116
Substandard [Member] | Land, Development, Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,929	562
Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,869	4,551
Substandard [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 669	$ 606

XML

Loans - Investment in Residential and Consumer Loans, Excluding Loans from Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,713,093	$ 1,025,303
Residential Real Estate [Member] | Performing TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,703,859	1,018,196
Residential Real Estate [Member] | Nonperforming TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	9,234	7,107
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	194,603	107,480
Consumer and Other [Member] | Performing TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	194,173	107,107
Consumer and Other [Member] | Nonperforming TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 430	$ 373

XML

Loans - Summary of Total Contractually Required Principal and Interest Cash Payments, Management's Estimate of Expected Total Cash Payments and Carrying Value of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Contractually required principal and interest	$ 294,278	$ 248,283
Non-accretable difference	(59,433)	(13,183)
Cash flows expected to be collected	234,845	235,100
Accretable yield	(67,174)	(70,942)
Carrying value of acquired loans	167,671	164,158
Allowance for loan losses	(216)	(295)
Carrying value less allowance for loan losses	$ 167,455	$ 163,863

XML

Loans - Summary of Changes in Total Contractually Required Principal and Interest Cash Payments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Contractually required principal and interest, beginning balance			$ 248,283
Non-accretable difference, beginning balance			(13,183)
Cash flows expected to be collected, beginning balance			235,100
Accretable yield, beginning balance			(70,942)
Carrying value of acquired loans, beginning balance			164,158
Contractually required principal and interest, ending balance	$ 294,278		294,278
Non-accretable difference, ending balance	(59,433)		(59,433)
Cash flows expected to be collected, ending balance	234,845		234,845
Accretable yield, ending balance	(67,174)		(67,174)
Carrying value of acquired loans, ending balance	167,671		167,671
Contractually Required Principal and Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Contractually required principal and interest, beginning balance	285,576	$ 280,114	248,283	$ 297,821
Effect of acquisitions	33,687		122,392	20,729
All other adjustments	(24,985)	(21,776)	(76,397)	(60,212)
Contractually required principal and interest, ending balance	294,278	258,338	294,278	258,338
Non-Accretable Difference [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-accretable difference, beginning balance	(44,166)	(14,047)	(13,183)	(18,372)
Effect of acquisitions	(20,763)		(58,927)	(6,347)
All other adjustments	5,496	1,148	12,677	11,820
Non-accretable difference, ending balance	(59,433)	(12,899)	(59,433)	(12,899)
Cash Flows Expected to be Collected [Member]
Financing Receivable, Recorded Investment [Line Items]
Cash flows expected to be collected, beginning balance	241,410	266,067	235,100	279,449
Effect of acquisitions	12,924		63,465	14,382
All other adjustments	(19,489)	(20,628)	(63,720)	(48,392)
Cash flows expected to be collected, ending balance	234,845	245,439	234,845	245,439
Accretable Yield [Member]
Financing Receivable, Recorded Investment [Line Items]
Accretable yield, beginning balance	(67,460)	(86,703)	(70,942)	(93,525)
Effect of acquisitions	(1,492)		(7,770)	(3,266)
Income accretion	7,682	7,696	26,496	24,780
All other adjustments	(5,904)	(2,457)	(14,958)	(9,453)
Accretable yield, ending balance	(67,174)	(81,464)	(67,174)	(81,464)
Carry Value of Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Carrying value of acquired loans, beginning balance	173,950	179,364	164,158	185,924
Effect of acquisitions	11,432		55,695	11,116
Income accretion	7,682	7,696	26,496	24,780
All other adjustments	(25,393)	(23,085)	(78,678)	(57,845)
Carrying value of acquired loans, ending balance	$ 167,671	$ 163,975	$ 167,671	$ 163,975

XML

Loans Held for Sale - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)
Loans Receivable Held For Sale Net [Abstract]
Net gains from changes in estimated fair value of mortgage loans held for sale	$ 1,000	$ 723,000
Loans held for sale, past due	0	0
Loans held for sale, on nonaccrual	$ 0	$ 0

XML

Loans Held for Sale - Summary of Activity in Mortgage Loans Held for Sale (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Loans Receivable Held For Sale Net [Abstract]
Beginning balance	$ 36,366	$ 8,959	$ 19,647	$ 2,285
Effect from acquisitions	2,835		8,959
Loans originated	91,910	23,444	242,226	53,806
Proceeds from sales	(94,226)	(20,564)	(238,613)	(44,780)
Change in fair value	1		723
Net realized gain on sales	2,668	404	6,612	932
Ending balance	$ 39,554	$ 12,243	$ 39,554	$ 12,243

XML

Loans Held for Sale - Schedule of Summarizes The Notional Amounts For Interest Rate Lock Commitments And Best Efforts Forward Trades and MBS Forward Trades Pertaining To Loans Held For Sale (Detail) - Loans Held for Sale [Member] $ in Thousands	Sep. 30, 2018 USD ($)
Loans Held For Sale [Line Items]
Total derivative instruments	$ 169,236
Interest Rate Lock Commitments [Member]
Loans Held For Sale [Line Items]
Total derivative instruments	75,811
Best Efforts Forward Trades [Member]
Loans Held For Sale [Line Items]
Total derivative instruments	66,425
MBS Forward Trades [Member]
Loans Held For Sale [Line Items]
Total derivative instruments	$ 27,000

XML

Securities Sold Under Agreement to Repurchase - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Banking And Thrift [Abstract]
Securities sold under agreement to repurchase	$ 51,311	$ 52,080

XML

Securities Sold Under Agreement to Repurchase - Summary of Repurchase Agreement (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets Sold Under Agreements To Repurchase [Line Items]
Market value of securities pledged	$ 67,283	$ 59,682
Securities sold under agreement to repurchase	$ 51,311	$ 52,080
Market value pledged as a % of borrowings	131.00%	115.00%
Mortgage Backed Securities [Member]
Assets Sold Under Agreements To Repurchase [Line Items]
Market value of securities pledged	$ 66,849	$ 59,239
Securities sold under agreement to repurchase	$ 51,195	$ 52,030
Market value pledged as a % of borrowings	131.00%	114.00%
Municipal Securities [Member]
Assets Sold Under Agreements To Repurchase [Line Items]
Market value of securities pledged	$ 434	$ 443
Securities sold under agreement to repurchase	$ 116	$ 50
Market value pledged as a % of borrowings	374.00%	886.00%

XML

Business Combinations - Additional Information (Detail) $ / shares in Units, $ in Thousands					3 Months Ended		9 Months Ended
	Sep. 01, 2018 USD ($) $ / shares	Jan. 01, 2018 USD ($) $ / shares	May 01, 2017 USD ($) $ / shares	Apr. 01, 2017 USD ($) $ / shares	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill on the acquisition					$ 802,880		$ 802,880		$ 257,683
Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Effective date of acquisition							Apr. 01, 2017
Increase in total assets				14.00%
Increase in total deposits				13.00%
Merger and acquisition related expenses					0	$ 0	$ 0	$ 3,927
Goodwill on the acquisition				$ 73,829
Multiplied by the cash consideration each Platinum share is entitled to receive | $ / shares				$ 7.60
Per share exchange ratio				3.7832
Total purchase consideration				$ 119,431
Loans at fair value				454,584
Estimated discount on loans acquired				$ 8,980
Estimated discount to outstanding principal balance				1.90%
Percentage of loan acquired										13.30%
Platinum Bank Holding Company [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Deposit intangible asset				$ 3,992
Platinum Bank Holding Company [Member] | Core Deposits [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated economic life							10 years
Platinum Bank Holding Company [Member] | Purchased Credit-Impaired [Member]
Business Acquisition [Line Items]
Loans with credit deficiencies				$ 12,218
Platinum Bank Holding Company [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Percentage of outstanding stock acquired				100.00%
Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Effective date of acquisition							May 01, 2017
Increase in total assets			19.00%
Increase in total deposits			17.00%
Merger and acquisition related expenses					0	0	$ 149	6,401
Goodwill on the acquisition			$ 77,826
Multiplied by the cash consideration each Platinum share is entitled to receive | $ / shares			$ 18.00
Per share exchange ratio			0.95
Total purchase consideration			$ 157,372
Loans at fair value			568,240
Estimated discount on loans acquired			$ 9,479
Estimated discount to outstanding principal balance			1.60%
Percentage of loan acquired										16.60%
Gateway Financial Holdings Of Florida Inc [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Deposit intangible asset			$ 8,432
Gateway Financial Holdings Of Florida Inc [Member] | Core Deposits [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated economic life							10 years
Gateway Financial Holdings Of Florida Inc [Member] | Purchased Credit-Impaired [Member]
Business Acquisition [Line Items]
Loans with credit deficiencies			$ 7,827
Gateway Financial Holdings Of Florida Inc [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Percentage of outstanding stock acquired			100.00%
Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Effective date of acquisition							Jan. 01, 2018
Increase in total assets		14.00%
Increase in total deposits		13.00%
Merger and acquisition related expenses					0		$ 10,474
Goodwill on the acquisition		$ 114,228
Per share exchange ratio		0.89
Total purchase consideration		$ 187,852
Loans at fair value		684,322
Estimated discount on loans acquired		$ 22,657
Estimated discount to outstanding principal balance		3.20%
Percentage of loan acquired									14.30%
Goodwill, period decrease					4,114		4,114
Income tax expense, related to goodwill					1,397		$ 1,397
Determination period for fair value estimates		1 year
Sunshine Bancorp, Inc. [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Deposit intangible asset		$ 8,525
Sunshine Bancorp, Inc. [Member] | Core Deposits [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated economic life							10 years
Sunshine Bancorp, Inc. [Member] | Purchased Credit-Impaired [Member]
Business Acquisition [Line Items]
Loans with credit deficiencies		$ 8,232
Sunshine Bancorp, Inc. [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Percentage of outstanding stock acquired		100.00%
HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Effective date of acquisition							Jan. 01, 2018
Increase in total assets		33.00%
Increase in total deposits		32.00%
Merger and acquisition related expenses					0	$ 11,527	$ 0	$ 11,527
Goodwill on the acquisition		$ 233,321
Multiplied by the cash consideration each Platinum share is entitled to receive | $ / shares		$ 1.925
Per share exchange ratio		0.675
Total purchase consideration		$ 448,236
Loans at fair value		1,326,035
Estimated discount on loans acquired		$ 40,438
Estimated discount to outstanding principal balance		3.00%
Percentage of loan acquired									27.80%
Determination period for fair value estimates		1 year
HCBF Holding Company, Inc. [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Deposit intangible asset		$ 23,625
HCBF Holding Company, Inc. [Member] | Core Deposits [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated economic life							10 years
HCBF Holding Company, Inc. [Member] | Purchased Credit-Impaired [Member]
Business Acquisition [Line Items]
Loans with credit deficiencies		$ 36,031
HCBF Holding Company, Inc. [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Percentage of outstanding stock acquired		100.00%
Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Effective date of acquisition							Sep. 01, 2018
Increase in total assets	24.00%
Increase in total deposits	24.00%
Merger and acquisition related expenses					$ 10,395		$ 10,630
Goodwill on the acquisition	$ 197,648
Multiplied by the cash consideration each Platinum share is entitled to receive | $ / shares	$ 2.30
Per share exchange ratio	0.738
Total purchase consideration	$ 389,476
Loans at fair value	1,141,672
Estimated discount on loans acquired	$ 23,118
Estimated discount to outstanding principal balance	2.00%
Percentage of loan acquired									23.90%
Determination period for fair value estimates	1 year
Charter Financial Corporation [Member] | Core Deposits [Member]
Business Acquisition [Line Items]
Deposit intangible asset	$ 19,795
Charter Financial Corporation [Member] | Core Deposits [Member] | Maximum [Member]
Business Acquisition [Line Items]
Estimated economic life							10 years
Charter Financial Corporation [Member] | Purchased Credit-Impaired [Member]
Business Acquisition [Line Items]
Loans with credit deficiencies	$ 11,432
Charter Financial Corporation [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Percentage of outstanding stock acquired	100.00%

XML

Business Combinations - Summary of Purchase Price Calculation (Detail) $ / shares in Units, $ in Thousands	Sep. 01, 2018 USD ($) $ / shares shares	Jan. 01, 2018 USD ($) $ / shares shares	May 01, 2017 USD ($) $ / shares shares	Apr. 01, 2017 USD ($) $ / shares shares
Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Number of shares of common stock outstanding | shares				1,131,134
Per share exchange ratio				3.7832
Number of shares of CenterState common stock less fractional shares | shares				4,279,255
Multiplied by CenterState common stock price per share | $ / shares				$ 25.90
Fair value of CenterState common stock issued				$ 110,833
Multiplied by the cash consideration each share is entitled to receive | $ / shares				$ 7.60
Total cash consideration, not including cash for fractional shares				$ 8,597
Total cash consideration				8,598
Total purchase price				$ 119,431
Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Number of shares of common stock outstanding | shares			5,463,764
Preferred shares that converted to common shares upon a change in control | shares			919,236
Total common shares including conversion of preferred shares | shares			6,383,000
Number of shares of common shares exchanged for CenterState common stock | shares			4,468,100
Per share exchange ratio			0.95
Number of shares of CenterState common stock less fractional shares | shares			4,244,441
Multiplied by CenterState common stock price per share | $ / shares			$ 25.23
Fair value of CenterState common stock issued			$ 107,087
Number of shares of Gateway common shares exchanged for cash | shares			1,914,900
Multiplied by the cash consideration each share is entitled to receive | $ / shares			$ 18.00
Total cash consideration, not including cash for fractional shares			$ 34,468
Total cash consideration			34,474
Total consideration paid to common shareholders			141,561
Fair value of stock options converted to CenterState stock options			15,811
Total purchase price			$ 157,372
Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Number of shares of common stock outstanding | shares		7,922,479
Per share exchange ratio		0.89
Number of shares of CenterState common stock less fractional shares | shares		7,050,645
Multiplied by CenterState common stock price per share | $ / shares		$ 25.73
Fair value of CenterState common stock issued		$ 181,413
Total cash consideration		7
Total consideration paid to common shareholders		181,420
Fair value of stock options converted to CenterState stock options		6,432
Total purchase price		$ 187,852
HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Number of shares of common stock outstanding | shares		22,299,082
Per share exchange ratio		0.675
Number of shares of CenterState common stock less fractional shares | shares		15,051,639
Multiplied by CenterState common stock price per share | $ / shares		$ 25.73
Fair value of CenterState common stock issued		$ 387,279
Multiplied by the cash consideration each share is entitled to receive | $ / shares		$ 1.925
Total cash consideration, not including cash for fractional shares		$ 42,932
Total cash consideration		42,932
Total consideration paid to common shareholders		430,211
Fair value of stock options converted to CenterState stock options		18,025
Total purchase price		$ 448,236
Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Number of shares of common stock outstanding | shares	15,480,776
Per share exchange ratio	0.738
Number of shares of CenterState common stock less fractional shares | shares	11,424,214
Multiplied by CenterState common stock price per share | $ / shares	$ 30.62
Fair value of CenterState common stock issued	$ 349,809
Multiplied by the cash consideration each share is entitled to receive | $ / shares	$ 2.30
Total cash consideration, not including cash for fractional shares	$ 35,624
Total cash consideration	35,624
Total consideration paid to common shareholders	385,433
Cash out of Charter stock options	4,043
Total purchase price	$ 389,476

XML

Business Combinations - Summary of Purchase Price Calculation (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 01, 2018	Jan. 01, 2018	May 01, 2017	Apr. 01, 2017
Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Fractional shares				51
Fractional shares amount				$ 1
Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Fractional shares			254
Fractional shares amount			$ 6
Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Fractional shares		361
HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Fractional shares		241
Fractional shares amount		$ 6
Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Fractional shares	599
Fractional shares amount	$ 17

XML

Business Combinations - Summary of Fair Value of Assets Purchased, Including Goodwill and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 01, 2018	Jan. 01, 2018	Dec. 31, 2017	May 01, 2017	Apr. 01, 2017
Assets:
Goodwill	$ 802,880			$ 257,683
Platinum Bank Holding Company [Member]
Assets:
Cash and cash equivalents						$ 106,537
Loans, held for investment						442,366
Purchased credit impaired loans						12,218
Investments						28,873
Accrued interest receivable						1,216
Branch real estate						9,600
Furniture and fixtures						402
Bank property held for sale						4,382
FHLB stock						2,220
Other repossessed real estate owned						272
Core deposit intangible						3,992
Goodwill						73,829
Deferred tax asset						227
Other assets						29
Total assets acquired						686,163
Liabilities:
Deposits						520,423
Federal Home Loan Bank advances						40,546
Securities sold under agreement to repurchase						5,569
Accrued interest payable						94
Other liabilities						100
Total liabilities assumed						$ 566,732
Gateway Financial Holdings Of Florida Inc [Member]
Assets:
Cash and cash equivalents					$ 23,065
Loans, held for investment					560,413
Purchased credit impaired loans					7,827
Investments					231,951
Accrued interest receivable					2,422
Branch real estate					18,160
Furniture and fixtures					702
Bank property held for sale					1,087
Federal Reserve Bank and Federal Home Loan Bank stock					4,640
Other repossessed real estate owned					134
Bank owned life insurance					15,475
Servicing asset intangible					271
Core deposit intangible					8,432
Goodwill					77,826
Deferred tax asset					7,246
Other assets					1,217
Total assets acquired					960,868
Liabilities:
Deposits					708,209
Federal Home Loan Bank advances					90,598
Federal funds purchased					3,588
Accrued interest payable					304
Other liabilities					797
Total liabilities assumed					$ 803,496
Sunshine Bancorp, Inc. [Member]
Assets:
Cash and cash equivalents			$ 47,056
Loans, held for investment			676,090
Purchased credit impaired loans			8,232
Loans held for sale			430
Investments			93,006
Accrued interest receivable			2,170
Branch real estate			9,375
Furniture and fixtures			916
Bank property held for sale			9,503
Federal Reserve Bank and Federal Home Loan Bank stock			4,875
Bank owned life insurance			23,101
Core deposit intangible			8,525
Goodwill			114,228
Deferred tax asset			11,670
Other assets			6,135
Total assets acquired			1,015,312
Liabilities:
Deposits			719,039
Federal Home Loan Bank advances			95,001
Securities sold under agreement to repurchase			353
Subordinated notes			11,000
Accrued interest payable			457
Other liabilities			1,610
Total liabilities assumed			827,460
HCBF Holding Company, Inc. [Member]
Assets:
Cash and cash equivalents			77,176
Loans, held for investment			1,290,004
Purchased credit impaired loans			36,031
Loans held for sale			5,694
Investments			585,297
Accrued interest receivable			5,847
Branch real estate			34,035
Furniture and fixtures			3,571
Bank property held for sale			14,140
FHLB and other stock			9,488
Other repossessed real estate owned			5,144
Bank owned life insurance			39,089
Core deposit intangible			23,625
Goodwill			233,321
Deferred tax asset			14,071
Other assets			2,536
Total assets acquired			2,379,069
Liabilities:
Deposits			1,755,155
Federal Home Loan Bank advances			157,919
Corporate debentures			5,872
Accrued interest payable			478
Other liabilities			11,409
Total liabilities assumed			$ 1,930,833
Charter Financial Corporation [Member]
Assets:
Cash and cash equivalents		$ 184,020
Loans, held for investment		1,130,240
Purchased credit impaired loans		11,432
Loans held for sale		2,835
Investments		73,808
Accrued interest receivable		3,684
Branch real estate		27,930
Furniture and fixtures		1,988
Bank property held for sale		1,695
FHLB and other stock		1,483
Other repossessed real estate owned		257
Bank owned life insurance		54,813
Core deposit intangible		19,795
Goodwill		197,648
Deferred tax asset		1,966
Other assets		20,947
Total assets acquired		1,734,541
Liabilities:
Deposits		1,321,970
Corporate debentures		9,000
Accrued interest payable		1,015
Other liabilities		13,080
Total liabilities assumed		$ 1,345,065

XML

Business Combinations - Summary of Contractually Required Principal and Interest Cash Payments for Purchased Credit Impaired Loans (Detail) - Purchased Credit-Impaired [Member] - USD ($) $ in Thousands	Sep. 01, 2018	Jan. 01, 2018	May 01, 2017	Apr. 01, 2017
Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Contractually required principal and interest				$ 18,811
Non-accretable difference				(4,639)
Cash flows expected to be collected				14,172
Accretable yield				(1,954)
Total purchased credit-impaired loans acquired				$ 12,218
Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Contractually required principal and interest			$ 12,523
Non-accretable difference			(2,465)
Cash flows expected to be collected			10,058
Accretable yield			(2,231)
Total purchased credit-impaired loans acquired			$ 7,827
Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Contractually required principal and interest		$ 21,598
Non-accretable difference		(12,213)
Cash flows expected to be collected		9,385
Accretable yield		(1,153)
Total purchased credit-impaired loans acquired		8,232
HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Contractually required principal and interest		67,107
Non-accretable difference		(25,951)
Cash flows expected to be collected		41,156
Accretable yield		(5,125)
Total purchased credit-impaired loans acquired		$ 36,031
Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Contractually required principal and interest	$ 33,687
Non-accretable difference	(20,763)
Cash flows expected to be collected	12,924
Accretable yield	(1,492)
Total purchased credit-impaired loans acquired	$ 11,432

XML

Business Combinations - Summary of Fair Value of Acquired Loans and Unpaid Principal Balance (Detail) - USD ($) $ in Thousands	Sep. 01, 2018	Jan. 01, 2018	May 01, 2017	Apr. 01, 2017
Book Balance [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				$ 463,564
Book Balance [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			$ 577,719
Book Balance [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		$ 706,979
Book Balance [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		1,366,473
Book Balance [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	$ 1,164,790
Book Balance [Member] | Residential Real Estate [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				37,206
Book Balance [Member] | Residential Real Estate [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			142,881
Book Balance [Member] | Residential Real Estate [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		148,342
Book Balance [Member] | Residential Real Estate [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		370,611
Book Balance [Member] | Residential Real Estate [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	284,505
Book Balance [Member] | Commercial Real Estate [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				262,612
Book Balance [Member] | Commercial Real Estate [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			321,262
Book Balance [Member] | Commercial Real Estate [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		375,377
Book Balance [Member] | Commercial Real Estate [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		636,517
Book Balance [Member] | Commercial Real Estate [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	567,506
Book Balance [Member] | Land, Development, Construction [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				47,675
Book Balance [Member] | Land, Development, Construction [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			47,727
Book Balance [Member] | Land, Development, Construction [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		58,530
Book Balance [Member] | Land, Development, Construction [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		149,547
Book Balance [Member] | Land, Development, Construction [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	181,128
Book Balance [Member] | Commercial and Industrial [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				96,587
Book Balance [Member] | Commercial and Industrial [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			46,953
Book Balance [Member] | Commercial and Industrial [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		104,811
Book Balance [Member] | Commercial and Industrial [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		113,818
Book Balance [Member] | Commercial and Industrial [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	88,308
Book Balance [Member] | Consumer and Other [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				2,954
Book Balance [Member] | Consumer and Other [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			7,803
Book Balance [Member] | Consumer and Other [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		1,770
Book Balance [Member] | Consumer and Other [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		41,660
Book Balance [Member] | Consumer and Other [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	26,221
Book Balance [Member] | Purchased Credit-Impaired [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				16,530
Book Balance [Member] | Purchased Credit-Impaired [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			11,093
Book Balance [Member] | Purchased Credit-Impaired [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		18,149
Book Balance [Member] | Purchased Credit-Impaired [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		54,320
Book Balance [Member] | Purchased Credit-Impaired [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	17,122
Fair Value [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				454,584
Fair Value [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			568,240
Fair Value [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		684,322
Fair Value [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		1,326,035
Fair Value [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	1,141,672
Fair Value [Member] | Residential Real Estate [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				37,419
Fair Value [Member] | Residential Real Estate [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			142,468
Fair Value [Member] | Residential Real Estate [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		146,057
Fair Value [Member] | Residential Real Estate [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		363,559
Fair Value [Member] | Residential Real Estate [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	280,200
Fair Value [Member] | Commercial Real Estate [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				259,727
Fair Value [Member] | Commercial Real Estate [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			317,578
Fair Value [Member] | Commercial Real Estate [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		371,323
Fair Value [Member] | Commercial Real Estate [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		627,900
Fair Value [Member] | Commercial Real Estate [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	557,730
Fair Value [Member] | Land, Development, Construction [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				46,618
Fair Value [Member] | Land, Development, Construction [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			46,489
Fair Value [Member] | Land, Development, Construction [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		57,331
Fair Value [Member] | Land, Development, Construction [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		146,639
Fair Value [Member] | Land, Development, Construction [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	178,687
Fair Value [Member] | Commercial and Industrial [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				95,701
Fair Value [Member] | Commercial and Industrial [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			46,274
Fair Value [Member] | Commercial and Industrial [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		99,650
Fair Value [Member] | Commercial and Industrial [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		110,630
Fair Value [Member] | Commercial and Industrial [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	87,062
Fair Value [Member] | Consumer and Other [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				2,901
Fair Value [Member] | Consumer and Other [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			7,604
Fair Value [Member] | Consumer and Other [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		1,729
Fair Value [Member] | Consumer and Other [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		41,276
Fair Value [Member] | Consumer and Other [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	26,561
Fair Value [Member] | Purchased Credit-Impaired [Member] | Platinum Bank Holding Company [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans				$ 12,218
Fair Value [Member] | Purchased Credit-Impaired [Member] | Gateway Financial Holdings Of Florida Inc [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans			$ 7,827
Fair Value [Member] | Purchased Credit-Impaired [Member] | Sunshine Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		8,232
Fair Value [Member] | Purchased Credit-Impaired [Member] | HCBF Holding Company, Inc. [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans		$ 36,031
Fair Value [Member] | Purchased Credit-Impaired [Member] | Charter Financial Corporation [Member]
Business Acquisition [Line Items]
Book Balance and Fair Value of acquired loans	$ 11,432

XML

Business Combinations - Pro-Forma Financial Information And Actual Results of Acquisition (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Combinations [Abstract]
Net interest income	$ 112,182	$ 109,779	$ 339,786	$ 315,211
Net income available to common shareholders	$ 51,250	$ 32,011	$ 131,102	$ 89,823
EPS - basic	$ 0.54	$ 0.34	$ 1.38	$ 0.96
EPS - diluted	$ 0.53	$ 0.33	$ 1.36	$ 0.94

XML

Interest Rate Swap Derivatives - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative Instruments Notional And Fair Value [Line Items]
Market value of securities pledged	$ 67,283	$ 59,682
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments Notional And Fair Value [Line Items]
Derivative, Notional Amount	5,044,615	3,740,430
Market value of securities pledged	0	19,048
Collateral reserve for derivatives	$ 5,236	$ 16,991

XML

Interest Rate Swap Derivatives - Summary Information about the Interest Rate Swap Derivative Instruments (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Fair value of interest rate swap derivatives (asset)	$ 87,946	$ 42,480
Fair value of interest rate swap derivatives (liability)	88,065	43,259
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount	$ 5,044,615	$ 3,740,430
Weighted average pay rate on interest-rate swaps	3.49%	3.00%
Weighted average receive rate on interest rate swaps	3.48%	3.00%
Weighted average maturity (years)	11 years	11 years
Fair value of interest rate swap derivatives (asset)	$ 87,946	$ 42,480
Fair value of interest rate swap derivatives (liability)	$ 88,065	$ 43,259

XML

Revenue from Contracts with Customers - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 252,695	$ 173,248
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 0
Revenue, performance obligation, description	There are no minimum orders or future performance obligations or deferred recognition requirements.
Contract revenues	$ 0

XML

Recently Issued Accounting Standards - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Retained Earnings [Member]
Recently Issued Accounting Standards [Line Items]
Reclassification of the stranded tax effects on unrealized losses on AFS securities resulting from the change in federal tax rate	$ 1,241
Accumulated Other Comprehensive Income (Loss) [Member]
Recently Issued Accounting Standards [Line Items]
Reclassification of the stranded tax effects on unrealized losses on AFS securities resulting from the change in federal tax rate	$ (1,241)