10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________________________________________

FORM 10-Q

____________________________________________________

xQuarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended March 31, 2018

or

¨Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Commission File Number: 001-16715

____________________________________________________

First Citizens BancShares, Inc.

(Exact name of Registrant as specified in its charter)

____________________________________________________

Delaware	56-1528994
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)
4300 Six Forks Road, Raleigh, North Carolina	27609
(Address of principle executive offices)	(Zip code)

(919) 716-7000

(Registrant’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 twelve 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 ninety days.    Yes  x   No  ¨

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or such shorter period that the Registrant was required to submit and post such files)    Yes  x    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 “larger accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller 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  x

Class A Common Stock—$1 Par Value—11,005,220 shares

Class B Common Stock—$1 Par Value—1,005,185 shares

(Number of shares outstanding, by class, as of May 2, 2018)

INDEX

		Page No.
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements
	Consolidated Balance Sheets (Unaudited)	3
	Consolidated Statements of Income (Unaudited)	4
	Consolidated Statements of Comprehensive Income (Unaudited)	5
	Consolidated Statements of Changes in Shareholders’ Equity (Unaudited)	6
	Consolidated Statements of Cash Flows (Unaudited)	7
	Notes to Consolidated Financial Statements (Unaudited)	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	38
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	58
Item 4.	Controls and Procedures	58
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	58
Item 1A.	Risk Factors	58
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	59
Item 6.	Exhibits	59

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PART I

Item 1. Financial Statements

First Citizens BancShares, Inc. and Subsidiaries

Consolidated Balance Sheets

(Dollars in thousands, unaudited)	March 31, 2018			December 31, 2017
Assets
Cash and due from banks	$	248,139		$	336,150
Overnight investments	1,946,882			1,387,927
Investment in marketable equity securities	110,107			—
Investment securities available for sale	6,857,740			7,180,180
Investment securities held to maturity	74			76
Loans held for sale	46,660			51,179
Loans and leases	23,611,977			23,596,825
Allowance for loan and lease losses	(223,116		)	(221,893		)
Net loans and leases	23,388,861			23,374,932
Premises and equipment	1,140,820			1,138,431
Other real estate owned	48,089			51,097
Income earned not collected	96,607			95,249
FDIC shared-loss receivable	3,636			2,223
Goodwill	150,601			150,601
Other intangible assets	68,668			73,096
Other assets	329,553			686,371
Total assets	$	34,436,437		$	34,527,512
Liabilities
Deposits:
Noninterest-bearing	$	12,000,741		$	11,237,375
Interest-bearing	17,968,504			18,028,900
Total deposits	29,969,245			29,266,275
Short-term borrowings	554,758			693,807
Long-term obligations	194,413			870,240
FDIC shared-loss payable	102,466			101,342
Other liabilities	243,441			261,784
Total liabilities	31,064,323			31,193,448
Shareholders’ equity
Common stock:
Class A - $1 par value (16,000,000 shares authorized; 11,005,220 shares issued and outstanding at March 31, 2018 and December 31, 2017)	11,005			11,005
Class B - $1 par value (2,000,000 shares authorized; 1,005,185 shares issued and outstanding at March 31, 2018 and December 31, 2017)	1,005			1,005
Preferred stock - $0.01 par value (10,000,000 shares authorized; no shares issued and outstanding at March 31, 2018 and December 31, 2017)	—			—
Surplus	658,918			658,918
Retained earnings	2,931,509			2,785,430
Accumulated other comprehensive loss	(230,323		)	(122,294		)
Total shareholders’ equity	3,372,114			3,334,064
Total liabilities and shareholders’ equity	$	34,436,437		$	34,527,512

See accompanying Notes to Consolidated Financial Statements.

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First Citizens BancShares, Inc. and Subsidiaries

Consolidated Statements of Income

	Three months ended March 31
(Dollars in thousands, except per share data, unaudited)	2018			2017
Interest income
Loans and leases	$	251,982		$	226,630
Investment securities and dividend income	35,020			29,751
Overnight investments	5,599			4,476
Total interest income	292,601			260,857
Interest expense
Deposits	3,756			4,436
Short-term borrowings	1,434			580
Long-term obligations	2,974			5,498
Total interest expense	8,164			10,514
Net interest income	284,437			250,343
Provision for loan and lease losses	7,605			8,231
Net interest income after provision for loan and lease losses	276,832			242,112
Noninterest income
Gain on acquisitions	—			12,017
Cardholder services	14,782			11,907
Merchant services	6,177			6,693
Service charges on deposit accounts	26,543			22,142
Wealth management services	23,569			20,962
Securities losses, net	—			(24		)
Marketable equity securities gains, net	971			—
Other service charges and fees	7,480			7,601
Mortgage income	4,237			7,576
Insurance commissions	3,776			3,558
ATM income	2,171			1,773
Adjustments to FDIC shared-loss receivable	(1,478		)	(1,628		)
Net impact from FDIC shared-loss agreement termination	—			(45		)
Gain on extinguishment of debt	25,814			—
Other	8,642			7,115
Total noninterest income	122,684			99,647
Noninterest expense
Salaries and wages	129,203			116,362
Employee benefits	32,091			27,178
Occupancy expense	27,954			24,762
Equipment expense	24,974			24,588
FDIC insurance expense	5,733			5,593
Collection and foreclosure-related expenses	4,146			3,763
Merger-related expenses	598			833
Other	43,364			33,621
Total noninterest expense	268,063			236,700
Income before income taxes	131,453			105,059
Income taxes	31,222			37,438
Net income	$	100,231		$	67,621
Average shares outstanding	12,010,405			12,010,405
Net income per share	$	8.35		$	5.63

See accompanying Notes to Consolidated Financial Statements.

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First Citizens BancShares, Inc. and Subsidiaries

Consolidated Statements of Comprehensive Income

	Three months ended March 31
(Dollars in thousands, unaudited)	2018			2017
Net income	$	100,231		$	67,621
Other comprehensive (loss) income:
Unrealized (losses) gains on securities available for sale:
Change in unrealized securities available for sale (losses) gains arising during period	(78,634		)	36,096
Tax effect	18,088			(13,419		)
Reclassification adjustment for losses included in income before income taxes	—			24
Tax effect	—			(9		)
Total change in unrealized (losses) gains on securities available for sale, net of tax	(60,546		)	22,692
Change in pension obligation:
Amortization of actuarial losses and prior service cost	3,337			2,500
Tax effect	(768		)	(941		)
Total change in pension obligation, net of tax	2,569			1,559
Other comprehensive (loss) income	(57,977		)	24,251
Total comprehensive income	$	42,254		$	91,872

See accompanying Notes to Consolidated Financial Statements.

5

First Citizens BancShares, Inc. and Subsidiaries

Consolidated Statements of Changes in Shareholders’ Equity

(Dollars in thousands, unaudited)	Class A Common Stock		Class B Common Stock		Surplus		Retained Earnings			Accumulated Other Comprehensive (Loss) Income			Total Shareholders’ Equity
Balance at December 31, 2016	$	11,005	$	1,005	$	658,918	$	2,476,691		$	(135,192	)	$	3,012,427
Net income	—		—		—		67,621			—			67,621
Other comprehensive income, net of tax	—		—		—		—			24,251			24,251
Cash dividends ($0.30 per share)	—		—		—		(3,603		)	—			(3,603		)
Balance at March 31, 2017	$	11,005	$	1,005	$	658,918	$	2,540,709		$	(110,941	)	$	3,100,696
Balance at December 31, 2017	$	11,005	$	1,005	$	658,918	$	2,785,430		$	(122,294	)	$	3,334,064
Cumulative effect of adoption of ASU 2016-01	—		—		—		18,716			(18,716		)	—
Cumulative effect of adoption of ASU 2018-02	—		—		—		31,336			(31,336		)	—
Net income	—		—		—		100,231			—			100,231
Other comprehensive loss, net of tax	—		—		—		—			(57,977		)	(57,977		)
Cash dividends ($0.35 per share)	—		—		—		(4,204		)	—			(4,204		)
Balance at March 31, 2018	$	11,005	$	1,005	$	658,918	$	2,931,509		$	(230,323	)	$	3,372,114

See accompanying Notes to Consolidated Financial Statements.

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First Citizens BancShares, Inc. and Subsidiaries

Consolidated Statements of Cash Flows

	Three months ended March 31
(Dollars in thousands, unaudited)	2018			2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	100,231		$	67,621
Adjustments to reconcile net income to cash provided by operating activities:
Provision for loan and lease losses	7,605			8,231
Deferred tax (benefit) expense	(5,573		)	6,693
Net change in current taxes	33,128			27,462
Depreciation	23,179			22,616
Net increase (decrease) in accrued interest payable	(2,454		)	150
Net increase in income earned not collected	(1,358		)	(617		)
Gain on acquisitions	—			(12,017		)
Securities losses	—			24
Marketable equity securities gains, net	(971		)	—
Gain on extinguishment of debt	(25,814		)	—
Loss on termination of FDIC shared-loss agreements	—			45
Origination of loans held for sale	(131,353		)	(134,932		)
Proceeds from sale of loans held for sale	138,538			162,837
Gain on sale of loans held for sale	(2,666		)	(3,456		)
Gain on sale of portfolio loans	—			(164		)
Net write-downs/losses on other real estate	1,210			1,717
Gain on sales of premises and equipment	—			(156		)
Net accretion of premiums and discounts	(10,323		)	(10,985		)
Amortization of intangible assets	6,049			5,271
Net change in FDIC receivable for shared-loss agreements	(1,834		)	2,591
Net change in FDIC payable for shared-loss agreements	1,124			1,005
Net change in other assets	342,312			(15,078		)
Net change in other liabilities	(12,642		)	8,741
Net cash provided by operating activities	458,388			137,599
CASH FLOWS FROM INVESTING ACTIVITIES
Net increase in loans outstanding	(7,283		)	(105,100		)
Purchases of investment securities available for sale	(374,850		)	(871,698		)
Purchases of marketable equity securities	(2,272		)	—
Proceeds from maturities/calls of investment securities held to maturity	2			15
Proceeds from maturities/calls of investment securities available for sale	503,717			787,182
Proceeds from sales of investment securities available for sale	—			14,162
Proceeds from sales of marketable equity securities	664			—
Net increase in overnight investments	(558,955		)	(856,442		)
Proceeds from sales of portfolio loans	—			32,294
Cash paid to the FDIC for shared-loss agreements	—			(2,760		)
Net cash paid to the FDIC for termination of shared-loss agreements	—			(285		)
Proceeds from sales of other real estate	8,380			8,845
Proceeds from sales of premises and equipment	13			2,205
Purchases of premises and equipment	(24,081		)	(15,459		)
Net cash acquired in business acquisitions	—			25,646
Net cash used in investing activities	(454,665		)	(981,395		)
CASH FLOWS FROM FINANCING ACTIVITIES
Net decrease in time deposits	(92,064		)	(107,339		)
Net increase in demand and other interest-bearing deposits	795,034			827,009
Net (decrease) increase in short-term borrowings	(139,049		)	87,100
Repayment of long-term obligations	(651,451		)	(442		)
Cash dividends paid	(4,204		)	—
Net cash (used in) provided by financing activities	(91,734		)	806,328
Change in cash and due from banks	(88,011		)	(37,468		)
Cash and due from banks at beginning of period	336,150			539,741
Cash and due from banks at end of period	$	248,139		$	502,273
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Transfers of loans to other real estate	$	6,582		$	5,822
Dividends declared but not paid	4,204			3,603
Reclassification of portfolio loans to loans held for sale	—			32,130

See accompanying Notes to Consolidated Financial Statements.

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First Citizens BancShares, Inc. and Subsidiaries

Notes to Unaudited Consolidated Financial Statements

NOTE A - ACCOUNTING POLICIES AND BASIS OF PRESENTATION

First Citizens BancShares, Inc. (BancShares) is a financial holding company organized under the laws of Delaware and conducts operations through its banking subsidiary, First-Citizens Bank & Trust Company (FCB), which is headquartered in Raleigh, North Carolina.

General

These consolidated financial statements and notes thereto are presented in accordance with instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States of America (GAAP). In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and consolidated results of operations have been made. The unaudited interim consolidated financial statements included in this Form 10-Q should be read in conjunction with the consolidated financial statements and notes to consolidated financial statements included in BancShares' Annual Report on Form 10-K for the year ended December 31, 2017.

Reclassifications

In certain instances, amounts reported in prior years' consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders' equity or net income.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates, and different assumptions in the application of these policies could result in material changes in BancShares' consolidated financial position, the consolidated results of its operations or related disclosures. Material estimates that are particularly susceptible to significant change include:

• Allowance for loan and lease losses;

• Fair value of financial instruments, including acquired assets and assumed liabilities;

• Pension plan assumptions;

• Cash flow estimates on purchased credit-impaired loans;

• Goodwill and other intangible assets;

• Federal Deposit Insurance Corporation (FDIC) shared-loss payable; and

• Income tax assets, liabilities and expense

Recently Adopted Accounting Pronouncements

FASB ASU 2018-03, Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10)

The amendments in this ASU provide clarification on certain aspects related to the guidance issued in ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The areas for correction or improvement include (1) equity securities without a readily determinable fair value - discontinuation; (2) equity securities without a readily determinable fair value - adjustments; (3) forward contracts and purchased options; (4) presentation requirements for certain fair value option liabilities; (5) fair value option liabilities denominated in a foreign currency; and (6) transition guidance for equity securities without a readily determinable fair value.

This ASU is effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Early adoption is permitted. We adopted the guidance effective in the first quarter of 2018. The adoption did not have a material impact on our consolidated financial position or consolidated results of operations.

FASB ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

This ASU requires a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 (Tax Act), which

8

was enacted on December 22, 2017. The Tax Act included a reduction to the corporate income tax rate from 35 percent to 21 percent effective January 1, 2018. The amount of the reclassification would be the difference between the historical corporate income tax rate and the newly enacted 21 percent corporate income tax rate.

The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We adopted the guidance effective in the first quarter of 2018. The change in accounting principle was accounted for as a cumulative-effect adjustment to the balance sheet resulting in a $31.3 million increase to retained earnings and a corresponding decrease to AOCI on January 1, 2018.

FASB ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

This ASU requires employers to present the service cost component of the net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Employers will present the other components separately from the line item that includes the service cost. In addition, only the service cost component of net benefit cost is eligible for capitalization.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted the guidance effective in the first quarter of 2018. The adoption did not have a material impact on our consolidated financial position or consolidated results of operations.

FASB ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments

This ASU addresses the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments in this ASU provide guidance on (1) debt prepayment or debt extinguishment costs; (2) settlement of zero-coupon debt instruments; (3) contingent consideration payments made after a business combination; (4) proceeds from the settlement of insurance claims; (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; (6) distributions received from equity method investees; (7) beneficial interests in securitization transactions; and (8) separately identifiable cash flows and application of the predominance principle.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The guidance requires application using a retrospective transition method. We adopted the guidance effective in the first quarter of 2018. The adoption did not have any impact on our Consolidated Statements of Cash Flows.

FASB ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities

This ASU addresses certain aspects of recognition, measurement, presentation and disclosure of certain financial instruments. The amendments in this ASU (1) require most equity investments to be measured at fair value with changes in fair value recognized in net income; (2) simplify the impairment assessment of equity investments without a readily determinable fair value; (3) eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value for financial instruments measured at amortized cost on the balance sheet; (4) require public business entities to use exit price notion, rather than entry prices, when measuring fair value of financial instruments for disclosure purposes; (5) require separate presentation of financial assets and financial liabilities by measurement category and form of financial assets on the balance sheet or the accompanying notes to the financial statements; (6) require separate presentation in other comprehensive income of 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 organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; and (7) state that a valuation allowance on deferred tax assets related to available-for-sale securities should be evaluated in combination with other deferred tax assets.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted the guidance effective in the first quarter of 2018. The change in accounting principle was accounted for as a cumulative-effect adjustment to the balance sheet resulting in an $18.7 million increase to retained earnings and a decrease to AOCI on January 1, 2018. With the adoption of this ASU equity securities can no longer be classified as available for sale, as such marketable equity securities will be disclosed as a separate line item on the balance sheet with changes in the fair value of equity securities reflected in net income.

For equity investments without a readily determinable fair value, BancShares has elected to measure the equity investments using the measurement alternative which requires BancShares to make a qualitative assessment of whether the investment is impaired at each reporting period. Under the measurement alternative these investments will be measured at cost, less any impairment, plus

9

or minus changes resulting from observable price changes in orderly transactions for an identical or similar investment of the same issuer. If a qualitative assessment indicates that the investment is impaired, BancShares will estimate the investment's fair value in accordance with ASC 820 and, if the fair value is less than the investment's carrying value, recognize an impairment loss in net income equal to the difference between carrying value and fair value. Equity investments without a readily determinable fair value are recorded within other assets in the consolidated balance sheets.

FASB ASU 2014-09, Revenue from Contracts with Customers (Topic 606)

In May 2014, the FASB issued a standard on the recognition of revenue from contracts with customers with the core principle being for a company to recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the consideration to which the company expects to be entitled in exchange for those goods or services. The new standard, which provides a five step model to determine when and how revenue is recognized, also results in enhanced disclosures about revenue, provides guidance for transactions that were not previously addressed comprehensively and improves guidance for multiple-element arrangements.

Per ASU 2015-14, Deferral of the Effective Date, this guidance was deferred and is effective for fiscal periods beginning after December 15, 2017, including interim reporting periods within that reporting period. We adopted the guidance effective in the first quarter of 2018. Our revenue is comprised primarily of net interest income on financial assets and liabilities, which is explicitly excluded from the scope of the new guidance, and noninterest income. The contracts that are in scope of the guidance are primarily related to cardholder and merchant services income, service charges on deposit accounts, wealth management services income, other service charges and fees, insurance commissions, ATM income, sales of other real estate and other. Based on our overall assessment of revenue streams and review of related contracts affected by the ASU, the adoption of this guidance did not change the method in which we currently recognize revenue.

We also completed an evaluation of the costs related to these revenue streams to determine whether such costs should be presented as expenses or contra-revenue (i.e., gross vs. net). Based on this evaluation, we determined that the classification of cardholder and merchant processing costs as well as expenses for cardholder reward programs should be netted against cardholder and merchant services income. We used the full retrospective method of adoption and restated the prior financial statements to net the cardholder and merchant processing costs against the related cardholder and merchant services income. These classification changes resulted in changes to both noninterest income and noninterest expense, however, there was no change to previously reported net income. Merchant processing expenses of $18.3 million have been reclassified and reported as a component of merchant services income for the three months ended March 31, 2017. Cardholder processing expenses of $6.8 million and cardholder reward programs expense of $2.5 million have been reclassified and reported as a component of cardholder services income for the three months ended March 31, 2017.

Recently Issued Accounting Pronouncements

FASB ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment

This ASU eliminates Step 2 from the goodwill impairment test. 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 ASU, 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. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative test.

This ASU will be effective for BancShares' annual or interim goodwill impairment tests for fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We expect to adopt the guidance for our annual impairment test in fiscal year 2020. BancShares does not anticipate any impact to our consolidated financial position or consolidated results of operations as a result of the adoption.

FASB ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

This ASU eliminates the delayed recognition of the full amount of credit losses until the loss was probable of occurring and instead will reflect an entity's current estimate of all expected credit losses. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The

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ASU does not specify a method for measuring expected credit losses and allows an entity to apply methods that reasonably reflect its expectations of the credit loss estimate based on the entity's size, complexity and risk profile. In addition, the disclosures of credit quality indicators in relation to the amortized cost of financing receivables, a current disclosure requirement, are further disaggregated by year of origination.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018. We will adopt the guidance by the first quarter of 2020 with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption. For BancShares, the standard will apply to loans, unfunded loan commitments and debt securities. We have formed a cross-functional team co-led by Corporate Finance and Risk Management with executive sponsorship and engaged a third party to assist with the adoption. The implementation team has developed a detailed project plan and is staying informed about the broader industry's perspective and insights, and identifying and researching key decision points. We have completed the readiness assessment and gap analysis related to data, modeling IT, accounting policy, controls and reporting which has enabled us to determine the areas of focus and estimate total body of work. Our current critical activities include model design, accounting policy development, data feasibility analysis, evaluation of reporting and disclosure solutions and completion of specific work stream project plans. We will continue to evaluate the impact the new standard will have on our consolidated financial statements as the final impact will be dependent, among other items, upon the loan portfolio composition and credit quality at the adoption date, as well as economic conditions, financial models used and forecasts at that time.

FASB ASU 2016-02, Leases (Topic 842)

This ASU increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The key difference between existing standards and this ASU is the requirement for lessees to recognize all lease contracts on their balance sheet. This ASU requires lessees to classify leases as either operating or finance leases, which are substantially similar to the current operating and capital leases classifications. The distinction between these two classifications under the new standard does not relate to balance sheet treatment, but relates to treatment in the statements of income and cash flows. Lessor guidance remains largely unchanged with the exception of how a lessor determines the appropriate lease classification for each lease to better align the lessor guidance with revised lessee classification guidance.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We will adopt during the first quarter of 2019. We expect an increase to the Consolidated Balance Sheets for right-of-use assets and associated lease liabilities, as well as resulting depreciation expense of the right-of-use assets and interest expense of the lease liabilities in the Consolidated Statements of Income, for arrangements previously accounted for as operating leases. Additionally, adding these assets to our balance sheet will impact our total risk-weighted assets used to determine our regulatory capital levels. Our impact analysis on this change in accounting principle estimates an increase to the Consolidated Balance Sheets for total lease liability ranging between $65.0 million and $85.0 million, as the initial gross up of both assets and liabilities. Capital is expected to be impacted by an estimated four to six basis points. These are preliminary estimates subject to change and will continue to be refined closer to adoption.

Revenue Recognition

The principles based standard requires disclosure of qualitative and quantitative information surrounding the amount, nature, timing and uncertainty of revenues and cash flows arising from contracts with customers. The core principle of the new standard is that revenue should be recognized when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services.

Descriptions of our noninterest revenue-generating activities that are within the scope of the new revenue ASU is broadly segregated as follows:

Cardholder and Merchant Services - These represent interchange fees from customer debit and credit card transactions that are earned at the time a cardholder engages in a transaction with a merchant as well as fees charged to merchants for providing them the ability to accept and process the debit and credit card transaction. Revenue is recognized when the performance obligation has been met as it is satisfied upon the completion of the card transaction. Additionally, ASU 2014-09 requires us to report costs associated with cardholder and merchant services transactions to be netted against the fees from such transactions.

Service Charges on Deposit Accounts - These deposit account-related fees represent monthly account maintenance and transaction-based service fees such as overdraft fees, stop payment fees and charges for issuing cashier's checks and money orders. For account maintenance services, revenue is recognized at the end of the statement period when our performance obligation has been satisfied. All other revenues from transaction-based services are recognized at a point in time when the performance obligation has been completed.

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Wealth Management Services - These primarily represent annuity fees, sales commissions, management fees, insurance sales, and trust and asset management fees. The performance obligation for wealth management services is the provision of services to place annuity products issued by the counterparty to investors, and the provision of services to manage the client’s assets, including brokerage custodial and other management services. Revenue is recognized over the period in which services are performed, are based on a percentage of the value of the assets under management/administration, and are fixed or variable based on account type, or are transaction-based.

Other Service Charges and Fees - These include, but are not limited to, check cashing fees, international banking fees, internet banking fees, wire transfer fees and safe deposit fees. These fees are charged, and revenue is recognized, at the point in time the service being requested by the customer is provided thus satisfying our performance obligation.

Insurance Commissions - These represent commissions earned on the issuance of insurance products and services. The performance obligation is generally satisfied upon the issuance of the insurance policy and revenue is recognized when the commission payment is remitted by the insurance carrier or policy holder depending on if the billing is performed by FCB or the carrier.

ATM Income - These represent fees imposed on customers and non-customers for engaging in an ATM transaction. Revenue is recognized at the time of the transaction as the performance obligation of rendering the ATM service has been met.

Sales of Other Real Estate - ORE property consists of foreclosed real estate used as collateral for loans, closed branches, land acquired and no longer intended for future use by FCB, and other real estate purchased for resale as ORE. Revenue is generally recognized on the date of sale where the performance obligation of providing access and transferring control of the specified ORE property to the buyer in good faith and good title is satisfied. This is recorded as a component of other noninterest income.

Other - This consists of several forms of recurring revenue such as external rental income, parking income, FHLB dividends, and income earned on changes in the cash surrender value of bank-owned life insurance, all of which are outside the scope of ASU 2014-09. The remaining miscellaneous income is the result of immaterial transactions where revenue is recognized when, or as, the performance obligation is satisfied.

NOTE B - BUSINESS COMBINATIONS

HomeBancorp, Inc.

On May 1, 2018, FCB completed the merger of Tampa, Florida-based HomeBancorp, Inc. (HomeBancorp) and its subsidiary, HomeBanc, into FCB. Under the terms of the merger agreement, cash consideration of $15.03 was paid to the shareholders of HomeBancorp for each share of HomeBancorp's common stock, with total consideration paid of $113.7 million. The merger will allow FCB to expand its footprint in Florida by entering into two new markets in Tampa and Orlando. As of March 31, 2018, HomeBancorp had $912.6 million in consolidated assets, $597.7 million in loans and $647.1 million in deposits. Due to the close proximity of the acquisition date and the date that BancShares' financial statements were issued, preliminary fair value estimates are not available.

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NOTE C - INVESTMENTS

The amortized cost and fair value of investment securities classified as available for sale and held to maturity at March 31, 2018 and December 31, 2017, are as follows:

	March 31, 2018
(Dollars in thousands)	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities available for sale
U.S. Treasury	$	1,557,991	$	—	$	4,098	$	1,553,893
Government agency	32,006		12		109		31,909
Mortgage-backed securities	5,360,251		1,001		154,585		5,206,667
Corporate bonds	59,414		319		80		59,653
Other	5,538		80		—		5,618
Total investment securities available for sale	$	7,015,200	$	1,412	$	158,872	$	6,857,740
	December 31, 2017
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities available for sale
U.S. Treasury	$	1,658,410	$	—	$	546	$	1,657,864
Government agency	8,695		15		40		8,670
Mortgage-backed securities	5,419,379		1,529		80,152		5,340,756
Equity securities	75,471		29,737		—		105,208
Corporate bonds	59,414		557		8		59,963
Other	7,645		256		182		7,719
Total investment securities available for sale	$	7,229,014	$	32,094	$	80,928	$	7,180,180
	March 31, 2018
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities held to maturity
Mortgage-backed securities	$	74	$	5	$	—	$	79
	December 31, 2017
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities held to maturity
Mortgage-backed securities	$	76	$	5	$	—	$	81

As a result of adopting ASU 2016-01 in the first quarter of 2018, investments in marketable equity securities are no longer classified as investments available for sale. At March 31, 2018 and December 31, 2017, we had $110.1 million and $105.2 million, respectively, in marketable equity securities recorded at fair value. Prior to January 1, 2018 equity securities were classified as available for sale and stated at fair value with unrealized gains and losses reported in accumulated other comprehensive income. A cumulative-effect adjustment of $18.7 million was recorded on January 1, 2018 to reclassify the net unrealized gains from accumulated other comprehensive income to retained earnings with subsequent changes in fair value recognized in the Consolidated Statements of Income.

Investments in mortgage-backed securities primarily represent securities issued by the Government National Mortgage Association, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation. Investments in corporate bonds and marketable equity securities represent positions in securities of other financial institutions. Other investments include trust preferred securities of financial institutions. The following table provides the amortized cost and fair value by contractual maturity. Expected maturities will differ from contractual maturities on certain securities because borrowers and issuers may have the right to call or prepay obligations with or without prepayment penalties. Repayments of mortgage-backed securities are dependent on the repayments of the underlying loan balances.

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	March 31, 2018				December 31, 2017
(Dollars in thousands)	Cost		Fair value		Cost		Fair value
Investment securities available for sale
Non-amortizing securities maturing in:
One year or less	$	1,105,460	$	1,103,291	$	808,768	$	808,301
One through five years	453,082		451,152		850,532		850,450
Five through 10 years	60,303		60,546		60,332		60,886
Over 10 years	36,104		36,084		14,532		14,579
Mortgage-backed securities	5,360,251		5,206,667		5,419,379		5,340,756
Equity securities	—		—		75,471		105,208
Total investment securities available for sale	$	7,015,200	$	6,857,740	$	7,229,014	$	7,180,180
Investment securities held to maturity
Mortgage-backed securities held to maturity	$	74	$	79	$	76	$	81

There were no sales of investment securities available for sale for the three months ended March 31, 2018. Gross gains and gross losses on sales of investment securities available for sale were $3 thousand and $27 thousand, respectively for the three months ended March 31, 2017.

The following table provides the realized and unrealized gains or losses on marketable equity securities for the three months ended March 31, 2018.

(Dollars in thousands)	Three months ended March 31, 2018
Marketable equity securities gains, net	$	971
Less net gains recognized on marketable equity securities sold	96
Unrealized gains recognized on marketable equity securities held	$	875

The following table provides information regarding securities available for sale with unrealized losses as of March 31, 2018 and December 31, 2017.

	March 31, 2018
	Less than 12 months				12 months or more				Total
(Dollars in thousands)	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Investment securities available for sale:
U.S. Treasury	$	1,453,968	$	4,049	$	99,925	$	49	$	1,553,893	$	4,098
Government agency	12,059		81		2,159		28		14,218		109
Mortgage-backed securities	2,404,338		58,606		2,535,662		95,979		4,940,000		154,585
Corporate bonds	9,950		80		—		—		9,950		80
Total	$	3,880,315	$	62,816	$	2,637,746	$	96,056	$	6,518,061	$	158,872
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Investment securities available for sale:
U.S. Treasury	$	1,408,166	$	345	$	249,698	$	201	$	1,657,864	$	546
Government agency	848		12		2,527		28		3,375		40
Mortgage-backed securities	2,333,254		20,911		2,723,406		59,241		5,056,660		80,152
Corporate bonds	5,025		8		—		—		5,025		8
Other	5,349		182		—		—		5,349		182
Total	$	3,752,642	$	21,458	$	2,975,631	$	59,470	$	6,728,273	$	80,928

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Investment securities available for sale with an aggregate fair value of $2.64 billion and $2.98 billion had continuous unrealized losses for more than 12 months with a corresponding aggregate unrealized loss of $96.1 million and $59.5 million as of March 31, 2018 and December 31, 2017, respectively. As of March 31, 2018, 224 of these are government sponsored enterprise-issued mortgage-backed securities or government agency securities and 1 is a U.S. Treasury security.

None of the unrealized losses identified as of March 31, 2018 or December 31, 2017 relate to the marketability of the securities or the issuers' ability to honor redemption obligations. Rather, the unrealized losses relate to changes in interest rates relative to when the debt securities were purchased. For all periods presented, BancShares had the ability and intent to retain these securities for a period of time sufficient to recover all unrealized losses. Therefore, none of the securities were deemed to be other than temporarily impaired.

Debt securities having an aggregate carrying value of $3.83 billion at March 31, 2018 and $4.59 billion at December 31, 2017 were pledged as collateral to secure public funds on deposit and certain short-term borrowings, and for other purposes as required by law.

On May 1, 2018, mortgage-backed securities with an amortized cost of $2.49 billion were transferred from investments available for sale to the held to maturity portfolio. At the time of transfer, the mortgage-backed securities had a fair value of $2.38 billion and a weighted average maturity of 13 years. FCB has the intent and ability to retain these securities until maturity.

NOTE D - LOANS AND LEASES

BancShares' accounting methods for loans and leases differ depending on whether they are purchased credit-impaired (PCI) or non-PCI. Non-PCI loans and leases include originated commercial and noncommercial, purchased non-impaired loans, purchased leases and certain purchased revolving credit. For purchased non-impaired loans to be included as non-PCI, it must be determined that the loans do not have any credit deterioration at the time of acquisition. Conversely, loans for which it is probable at acquisition that all required payments will not be collected in accordance with contractual terms are considered impaired and, therefore, classified as PCI loans. PCI loans are accounted for under the guidance in ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. PCI loans are recorded at fair value at the date of acquisition. No allowance for loan and lease losses is recorded on the acquisition date as the fair value of the acquired assets incorporates assumptions regarding credit risk over the life of the loans. An allowance is recorded if there is additional credit deterioration after the acquisition date.

BancShares reports PCI and non-PCI loan portfolios separately, and each portfolio is further divided into commercial and non-commercial based on the type of borrower, purpose, collateral, and/or our underlying credit management processes. Additionally, commercial and non-commercial loans are assigned to loan classes, which further disaggregate loans based upon common risk characteristics.

Commercial –Commercial loan classes include construction and land development, commercial mortgage, other commercial real estate, commercial and industrial, lease financing and other.

Construction and land development – Construction and land development consists of loans to finance land for development, investment, and use in a commercial business enterprise; multifamily apartments; and other commercial buildings that may be owner-occupied or income generating investments for the owner.

Commercial mortgage – Commercial mortgage consists of loans to purchase or refinance owner-occupied nonresidential and investment properties. Investment properties include office buildings and other facilities that are rented or leased to unrelated parties.

Other commercial real estate – Other commercial real estate consists of loans secured by farmland (including residential farms and other improvements) and multifamily (5 or more) residential properties.

Commercial and industrial – Commercial and industrial consists of loans or lines of credit to finance corporate credit cards, accounts receivable, inventory and other general business purposes.

Lease financing – Lease financing consists solely of lease financing agreements for business equipment, vehicles and other assets.

Other – Other consists of all other commercial loans not classified in one of the preceding classes. These typically include loans to non-profit organizations such as churches, hospitals, educational and charitable organizations, and certain loans repurchased with government guarantees.

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Noncommercial – Noncommercial loan classes consist of residential and revolving mortgage, construction and land development, and consumer loans.

Residential mortgage – Residential real estate consists of loans to purchase, construct or refinance the borrower's primary dwelling, second residence or vacation home.

Revolving mortgage – Revolving mortgage consists of home equity lines of credit that are secured by first or second liens on the borrower's primary residence.

Construction and land development – Construction and land development consists of loans to construct the borrower's primary or secondary residence or vacant land upon which the owner intends to construct a dwelling at a future date.

Consumer – Consumer loans consist of installment loans to finance purchases of vehicles, unsecured home improvements, student loans and revolving lines of credit that can be secured or unsecured, including personal credit cards.

Loans and leases outstanding included the following at March 31, 2018 and December 31, 2017:

(Dollars in thousands)	March 31, 2018		December 31, 2017
Non-PCI loans and leases:
Commercial:
Construction and land development	$	738,413	$	669,215
Commercial mortgage	9,859,136		9,729,022
Other commercial real estate	386,734		473,433
Commercial and industrial	2,695,205		2,730,407
Lease financing	910,589		894,801
Other	281,485		302,176
Total commercial loans	14,871,562		14,799,054
Noncommercial:
Residential mortgage	3,587,791		3,523,786
Revolving mortgage	2,651,648		2,701,525
Construction and land development	243,114		248,289
Consumer	1,554,025		1,561,173
Total noncommercial loans	8,036,578		8,034,773
Total non-PCI loans and leases	22,908,140		22,833,827
PCI loans:
Commercial:
Construction and land development	9,316		10,135
Commercial mortgage	325,073		358,103
Other commercial real estate	16,179		17,124
Commercial and industrial	3,732		6,374
Other	1,628		1,683
Total commercial loans	355,928		393,419
Noncommercial:
Residential mortgage	282,338		299,318
Revolving mortgage	60,388		63,908
Construction and land development	3,006		4,163
Consumer	2,177		2,190
Total noncommercial loans	347,909		369,579
Total PCI loans	703,837		762,998
Total loans and leases	$	23,611,977	$	23,596,825

At March 31, 2018, $65.5 million of total residential loans and leases were covered under shared-loss agreements with the FDIC, compared to $67.8 million at December 31, 2017. The shared-loss agreements, for their terms, protect BancShares from a substantial portion of the credit and asset quality risk that would otherwise be incurred.

At March 31, 2018, $9.11 billion in noncovered loans with a lendable collateral value of $6.26 billion were used to secure $85.2 million in Federal Home Loan Bank (FHLB) of Atlanta advances, resulting in additional borrowing capacity of $6.17 billion. At December 31, 2017, $8.75 billion in noncovered loans with a lendable collateral value of $6.08 billion were used to secure $835.2 million in FHLB of Atlanta advances, resulting in additional borrowing capacity of $5.24 billion. At March 31, 2018, $2.86 billion in noncovered loans with a lendable collateral value of $2.16 billion were used to secure additional borrowing capacity at the

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Federal Reserve Bank (FRB). At December 31, 2017, $2.77 billion in noncovered loans with a lendable collateral value of $2.08 billion were used to secure additional borrowing capacity at the FRB.

Certain residential real estate loans are originated to be sold to investors and are recorded in loans held for sale at fair value. Loans held for sale totaled $46.7 million and $51.2 million at March 31, 2018 and December 31, 2017, respectively. In addition, we may change our strategy for certain portfolio loans and sell them in the secondary market. At that time, portfolio loans are transferred to loans held for sale at the lower of amortized cost or market. During the first quarter of 2018, total proceeds from sales of loans held for sale were $138.5 million and there were no transfers to loans held for sale from the residential mortgage portfolio. During the first quarter of 2017, total proceeds from sales of loans held for sale were $195.1 million of which $32.3 million in sales were transferred to loans held for sale from the residential mortgage portfolio, resulting in a gain of $164 thousand.

Net deferred fees on originated non-PCI loans and leases, including unearned income as well as unamortized costs and fees, were $1.5 million and $1.7 million at March 31, 2018 and December 31, 2017, respectively. The unamortized discount related to purchased non-PCI loans and leases in the Guaranty Bank (Guaranty), Cordia Bancorp Inc. (Cordia) and First Citizens Bancorporation, Inc. (Bancorporation) acquisitions was $13.3 million, $2.5 million and $16.4 million, respectively, at March 31, 2018. At December 31, 2017, the unamortized discount related to purchased non-PCI loans and leases from the Guaranty, Cordia and Bancorporation acquisitions was $14.2 million, $2.7 million and $18.1 million, respectively. During the three months ended March 31, 2018 and March 31, 2017, accretion income on purchased non-PCI loans and leases was $2.9 million and $3.2 million, respectively.

Credit quality indicators

Loans and leases are monitored for credit quality on a recurring basis. The credit quality indicators used are dependent on the portfolio segment to which the loan relates. Commercial and noncommercial loans and leases have different credit quality indicators as a result of the unique characteristics of the loan segment being evaluated. The credit quality indicators for non-PCI and PCI commercial loans and leases are developed through a review of individual borrowers on an ongoing basis. Commercial loans are evaluated periodically with more frequent evaluations done on more severely criticized loans or leases. The credit quality indicators for non-PCI and PCI noncommercial loans are based on the delinquency status of the borrower. As the borrower becomes more delinquent, the likelihood of loss increases. The indicators represent the rating for loans or leases as of the date presented based on the most recent assessment performed. These credit quality indicators are defined as follows:

Pass – A pass rated asset is not adversely classified because it does not display any of the characteristics for adverse classification.

Special mention – A special mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, such potential weaknesses may result in deterioration of the repayment prospects or collateral position at some future date. Special mention assets are not adversely classified and do not warrant adverse classification.

Substandard – A substandard asset is inadequately protected by the current net worth and paying capacity of the borrower or of the collateral pledged, if any. Assets classified as substandard generally have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt. These assets are characterized by the distinct possibility of loss if the deficiencies are not corrected.

Doubtful – An asset classified as doubtful has all the weaknesses inherent in an asset classified substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable on the basis of currently existing facts, conditions and values.

Loss – Assets classified as loss are considered uncollectible and of such little value that it is inappropriate to be carried as an asset. This classification is not necessarily equivalent to any potential for recovery or salvage value, but rather that it is not appropriate to defer a full charge-off even though partial recovery may be affected in the future.

Ungraded – Ungraded loans represent loans that are not included in the individual credit grading process due to their relatively small balances or borrower type. The majority of ungraded loans at March 31, 2018 and December 31, 2017 relate to business credit cards. Business credit card loans are subject to automatic charge-off when they become 120 days past due in the same manner as unsecured consumer lines of credit. The remaining balance is comprised of a small amount of commercial mortgage, lease financing and other commercial real estate loans.

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Non-PCI loans and leases outstanding at March 31, 2018 and December 31, 2017 by credit quality indicator are provided below:

	March 31, 2018
(Dollars in thousands)	Non-PCI commercial loans and leases
Grade:	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	733,253	$	9,661,079	$	382,679	$	2,476,337	$	900,464	$	278,367	$	14,432,179
Special mention	483		81,680		1,187		37,571		3,347		1,107		125,375
Substandard	4,639		115,039		2,868		19,357		6,734		1,889		150,526
Doubtful	—		1,338		—		836		—		72		2,246
Ungraded	38		—		—		161,104		44		50		161,236
Total	$	738,413	$	9,859,136	$	386,734	$	2,695,205	$	910,589	$	281,485	$	14,871,562
	December 31, 2017
	Non-PCI commercial loans and leases
	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	665,197	$	9,521,019	$	468,942	$	2,511,307	$	883,779	$	298,064	$	14,348,308
Special mention	691		78,643		1,260		44,130		4,340		2,919		131,983
Substandard	3,327		128,848		3,224		18,617		6,585		1,193		161,794
Doubtful	—		262		—		385		—		—		647
Ungraded	—		250		7		155,968		97		—		156,322
Total	$	669,215	$	9,729,022	$	473,433	$	2,730,407	$	894,801	$	302,176	$	14,799,054

	March 31, 2018
	Non-PCI noncommercial loans and leases
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	3,542,327	$	2,628,122	$	239,107	$	1,541,749	$	7,951,305
30-59 days past due	23,833		9,364		2,885		6,935		43,017
60-89 days past due	2,429		3,636		—		2,440		8,505
90 days or greater past due	19,202		10,526		1,122		2,901		33,751
Total	$	3,587,791	$	2,651,648	$	243,114	$	1,554,025	$	8,036,578
	December 31, 2017
	Non-PCI noncommercial loans and leases
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	3,465,935	$	2,674,390	$	239,648	$	1,546,473	$	7,926,446
30-59 days past due	27,886		13,428		7,154		8,812		57,280
60-89 days past due	8,064		3,485		108		2,893		14,550
90 days or greater past due	21,901		10,222		1,379		2,995		36,497
Total	$	3,523,786	$	2,701,525	$	248,289	$	1,561,173	$	8,034,773

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PCI loans outstanding at March 31, 2018 and December 31, 2017 by credit quality indicator are provided below:

	March 31, 2018
(Dollars in thousands)	PCI commercial loans
Grade:	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	3,691	$	157,187	$	12,739	$	1,642	$	254	$	175,513
Special mention	338		61,443		307		488		928		63,504
Substandard	4,231		101,734		2,615		1,492		446		110,518
Doubtful	1,056		4,709		518		81		—		6,364
Ungraded	—		—		—		29		—		29
Total	$	9,316	$	325,073	$	16,179	$	3,732	$	1,628	$	355,928
	December 31, 2017
	PCI commercial loans
	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	1,817	$	181,353	$	13,830	$	4,057	$	275	$	201,332
Special mention	320		61,295		323		374		945		63,257
Substandard	5,792		106,807		2,163		1,843		463		117,068
Doubtful	2,206		8,648		808		73		—		11,735
Ungraded	—		—		—		27		—		27
Total	$	10,135	$	358,103	$	17,124	$	6,374	$	1,683	$	393,419

	March 31, 2018
	PCI noncommercial loans
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total PCI noncommercial loans
Current	$	249,443	$	53,885	$	2,420	$	2,095	$	307,843
30-59 days past due	9,196		1,662		19		40		10,917
60-89 days past due	1,436		851		—		—		2,287
90 days or greater past due	22,263		3,990		567		42		26,862
Total	$	282,338	$	60,388	$	3,006	$	2,177	$	347,909
	December 31, 2017
	PCI noncommercial loans
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total PCI noncommercial loans
Current	$	257,166	$	55,871	$	3,521	$	2,074	$	318,632
30-59 days past due	10,525		2,767		—		51		13,343
60-89 days past due	4,846		701		642		23		6,212
90 days or greater past due	26,781		4,569		—		42		31,392
Total	$	299,318	$	63,908	$	4,163	$	2,190	$	369,579

19

The aging of the outstanding non-PCI loans and leases, by class, at March 31, 2018 and December 31, 2017 is provided in the table below.

The calculation of days past due begins on the day after payment is due and includes all days through which all required interest or principal has not been paid. Loans and leases 30 days or less past due are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.

	March 31, 2018
(Dollars in thousands)	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	2,011	$	771	$	357	$	3,139	$	735,274	$	738,413
Commercial mortgage	9,813		4,738		7,058		21,609		9,837,527		9,859,136
Other commercial real estate	94		22		73		189		386,545		386,734
Commercial and industrial	8,273		1,844		1,503		11,620		2,683,585		2,695,205
Lease financing	3,677		45		1,512		5,234		905,355		910,589
Residential mortgage	23,833		2,429		19,202		45,464		3,542,327		3,587,791
Revolving mortgage	9,364		3,636		10,526		23,526		2,628,122		2,651,648
Construction and land development - noncommercial	2,885		—		1,122		4,007		239,107		243,114
Consumer	6,935		2,440		2,901		12,276		1,541,749		1,554,025
Other	46		47		129		222		281,263		281,485
Total non-PCI loans and leases	$	66,931	$	15,972	$	44,383	$	127,286	$	22,780,854	$	22,908,140
	December 31, 2017
	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	491	$	442	$	357	$	1,290	$	667,925	$	669,215
Commercial mortgage	12,288		2,375		6,490		21,153		9,707,869		9,729,022
Other commercial real estate	107		—		75		182		473,251		473,433
Commercial and industrial	6,694		1,510		1,266		9,470		2,720,937		2,730,407
Lease financing	2,983		167		973		4,123		890,678		894,801
Residential mortgage	27,886		8,064		21,901		57,851		3,465,935		3,523,786
Revolving mortgage	13,428		3,485		10,222		27,135		2,674,390		2,701,525
Construction and land development - noncommercial	7,154		108		1,379		8,641		239,648		248,289
Consumer	8,812		2,893		2,995		14,700		1,546,473		1,561,173
Other	188		6		133		327		301,849		302,176
Total non-PCI loans and leases	$	80,031	$	19,050	$	45,791	$	144,872	$	22,688,955	$	22,833,827

20

The recorded investment, by class, in loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at March 31, 2018 and December 31, 2017 for non-PCI loans and leases, were as follows:

	March 31, 2018				December 31, 2017
(Dollars in thousands)	Nonaccrual loans and leases		Loans and leases > 90 days and accruing		Nonaccrual loans and leases		Loans and leases > 90 days and accruing
Non-PCI loans and leases:
Construction and land development - commercial	$	1,059	$	—	$	1,040	$	—
Commercial mortgage	20,505		32		22,625		397
Other commercial real estate	616		—		916		—
Commercial and industrial	2,928		721		2,884		428
Lease financing	1,687		—		1,992		—
Residential mortgage	37,038		—		38,942		—
Revolving mortgage	21,421		—		19,990		—
Construction and land development - noncommercial	1,722		—		1,989		—
Consumer	2,082		2,277		1,992		2,153
Other	202		—		164		—
Total non-PCI loans and leases	$	89,260	$	3,030	$	92,534	$	2,978

The following table provides changes in the carrying value of PCI loans during the three months ended March 31, 2018 and March 31, 2017:

(Dollars in thousands)	2018			2017
Balance at January 1	$	762,998		$	809,169
Fair value of acquired loans	—			85,149
Accretion	17,973			19,351
Payments received and other changes, net	(77,134		)	(64,853		)
Balance at March 31	$	703,837		$	848,816
Unpaid principal balance at March 31	$	1,108,379		$	1,155,034

The carrying value of loans on the cost recovery method was $1.3 million at March 31, 2018 and $1.1 million at December 31, 2017. The cost recovery method is applied to loans when the timing of future cash flows is not reasonably estimable due to borrower nonperformance or uncertainty in the ultimate disposition of the asset. The recorded investment of PCI loans on nonaccrual status was $1.6 million and $624 thousand at March 31, 2018 and December 31, 2017, respectively.

During the three months ended March 31, 2018 and March 31, 2017, accretion income on PCI loans was $18.0 million and $19.4 million, respectively.

For PCI loans, improved credit loss expectations generally result in the reclassification of nonaccretable difference to accretable yield. Changes in expected cash flow not related to credit improvements or deterioration do not affect the nonaccretable difference.

The following table documents changes to the amount of accretable yield for the first three months of 2018 and 2017.

(Dollars in thousands)	2018			2017
Balance at January 1	$	316,679		$	335,074
Additions from acquisitions	—			16,653
Accretion	(17,973		)	(19,351		)
Reclassifications (to) from nonaccretable difference	(929		)	11,277
Changes in expected cash flows that do not affect nonaccretable difference	11,568			(2,179		)
Balance at March 31	$	309,345		$	341,474

21

NOTE E - ALLOWANCE FOR LOAN AND LEASE LOSSES (ALLL)

The following tables present the activity in the ALLL for non-PCI loan and lease losses by loan class for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Lease financing			Other			Residential mortgage			Revolving mortgage			Construction and land development - non- commercial			Consumer			Total
Balance at January 1	$	24,470		$	45,005		$	4,571		$	53,697		$	6,127		$	4,689		$	15,706		$	22,436		$	3,962		$	31,204		$	211,867
Provision	2,225			(1,365		)	(1,293		)	(425		)	987			114			1,512			466			107			2,923			5,251
Charge-offs	—			(46		)	—			(1,475		)	(854		)	(3		)	(806		)	(992		)	(182		)	(5,255		)	(9,613		)
Recoveries	23			239			145			1,219			41			42			77			194			26			1,309			3,315
Balance at March 31	$	26,718		$	43,833		$	3,423		$	53,016		$	6,301		$	4,842		$	16,489		$	22,104		$	3,913		$	30,181		$	210,820
	Three months ended March 31, 2017
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Lease financing			Other			Residential mortgage			Revolving mortgage			Construction and land development - non- commercial			Consumer			Total
Balance at January 1	$	28,877		$	48,278		$	3,269		$	50,225		$	5,907		$	3,127		$	14,447		$	21,013		$	1,596		$	28,287		$	205,026
Provision	2,536			6			304			3,592			575			517			1,351			550			(83		)	1,728			11,076
Charge-offs	(77		)	(37		)	(5		)	(3,253		)	(173		)	(123		)	(250		)	(825		)	—			(3,966		)	(8,709		)
Recoveries	55			364			4			265			6			13			287			552			—			1,080			2,626
Balance at March 31	$	31,391		$	48,611		$	3,572		$	50,829		$	6,315		$	3,534		$	15,835		$	21,290		$	1,513		$	27,129		$	210,019

22

The following tables present the allowance for non-PCI loan and lease losses and the recorded investment in loans, by loan class, based on impairment method as of March 31, 2018 and December 31, 2017:

	March 31, 2018
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Lease financing		Other		Residential mortgage		Revolving mortgage		Construction and land development - non-commercial		Consumer		Total
Allowance for loan and lease losses:
ALLL for loans and leases individually evaluated for impairment	$	171	$	3,521	$	306	$	621	$	494	$	—	$	2,905	$	1,053	$	82	$	713	$	9,866
ALLL for loans and leases collectively evaluated for impairment	26,547		40,312		3,117		52,395		5,807		4,842		13,584		21,051		3,831		29,468		200,954
Total allowance for loan and lease losses	$	26,718	$	43,833	$	3,423	$	53,016	$	6,301	$	4,842	$	16,489	$	22,104	$	3,913	$	30,181	$	210,820
Loans and leases:
Loans and leases individually evaluated for impairment	$	1,131	$	70,277	$	1,499	$	7,611	$	2,166	$	—	$	41,347	$	25,525	$	3,803	$	2,591	$	155,950
Loans and leases collectively evaluated for impairment	737,282		9,788,859		385,235		2,687,594		908,423		281,485		3,546,444		2,626,123		239,311		1,551,434		22,752,190
Total loan and leases	$	738,413	$	9,859,136	$	386,734	$	2,695,205	$	910,589	$	281,485	$	3,587,791	$	2,651,648	$	243,114	$	1,554,025	$	22,908,140
	December 31, 2017
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Lease financing		Other		Residential mortgage		Revolving mortgage		Construction and land development - non-commercial		Consumer		Total
Allowance for loan and lease losses:
ALLL for loans and leases individually evaluated for impairment	$	185	$	3,648	$	209	$	665	$	397	$	—	$	2,733	$	1,085	$	68	$	738	$	9,728
ALLL for loans and leases collectively evaluated for impairment	24,285		41,357		4,362		53,032		5,730		4,689		12,973		21,351		3,894		30,466		202,139
Total allowance for loan and lease losses	$	24,470	$	45,005	$	4,571	$	53,697	$	6,127	$	4,689	$	15,706	$	22,436	$	3,962	$	31,204	$	211,867
Loans and leases:
Loans and leases individually evaluated for impairment	$	788	$	73,655	$	1,857	$	7,974	$	1,914	$	521	$	37,842	$	23,770	$	4,551	$	2,774	$	155,646
Loans and leases collectively evaluated for impairment	668,427		9,655,367		471,576		2,722,433		892,887		301,655		3,485,944		2,677,755		243,738		1,558,399		22,678,181
Total loan and leases	$	669,215	$	9,729,022	$	473,433	$	2,730,407	$	894,801	$	302,176	$	3,523,786	$	2,701,525	$	248,289	$	1,561,173	$	22,833,827

23

The following tables show the activity in the allowance for PCI loan losses by loan class for the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31, 2018
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Residential mortgage			Revolving mortgage			Construction and land development - noncommercial			Consumer and other			Total
Balance at January 1	$	142		$	6,564		$	221		$	306		$	2,117		$	259		$	193		$	224		$	10,026
Provision	310			1,608			(46		)	13			264			209			(50		)	46			2,354
Charge-offs	—			(84		)	—			—			—			—			—			—			(84		)
Recoveries	—			—			—			—			—			—			—			—			—
Balance at March 31	$	452		$	8,088		$	175		$	319		$	2,381		$	468		$	143		$	270		$	12,296
	Three months ended March 31, 2017
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Residential mortgage			Revolving mortgage			Construction and land development - noncommercial			Consumer and other			Total
Balance at January 1	$	483		$	6,423		$	502		$	504		$	4,818		$	956		$	—		$	83		$	13,769
Provision	(186		)	(1,230		)	(158		)	(142		)	(545		)	(550		)	—			(34		)	(2,845		)
Charge-offs	—			—			—			—			—			—			—			—			—
Recoveries	—			—			—			—			—			—			—			—			—
Balance at March 31	$	297		$	5,193		$	344		$	362		$	4,273		$	406		$	—		$	49		$	10,924

The following tables show the ending balances of PCI loans and related allowance by class of loans as of March 31, 2018 and December 31, 2017:

	March 31, 2018
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Residential mortgage		Revolving mortgage		Construction and land development - noncommercial		Consumer and other		Total
ALLL for loans acquired with deteriorated credit quality	$	452	$	8,088	$	175	$	319	$	2,381	$	468	$	143	$	270	$	12,296
Loans acquired with deteriorated credit quality	9,316		325,073		16,179		3,732		282,338		60,388		3,006		3,805		703,837
	December 31, 2017
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Residential mortgage		Revolving mortgage		Construction and land development - noncommercial		Consumer and other		Total
ALLL for loans acquired with deteriorated credit quality	$	142	$	6,564	$	221	$	306	$	2,117	$	259	$	193	$	224	$	10,026
Loans acquired with deteriorated credit quality	10,135		358,103		17,124		6,374		299,318		63,908		4,163		3,873		762,998

As of March 31, 2018 and December 31, 2017, $170.4 million and $279.8 million, respectively, in PCI loans experienced an adverse change in expected cash flows since the date of acquisition.

24

The following tables provide information on non-PCI impaired loans and leases individually evaluated as of March 31, 2018 and December 31, 2017 including interest income recognized in the period during which the loans and leases were considered impaired.

	March 31, 2018
(Dollars in thousands)	With a recorded allowance		With no recorded allowance		Total		Unpaid principal balance		Related allowance recorded
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	740	$	391	$	1,131	$	1,461	$	171
Commercial mortgage	37,100		33,177		70,277		75,584		3,521
Other commercial real estate	1,086		413		1,499		1,614		306
Commercial and industrial	5,514		2,097		7,611		10,882		621
Lease financing	1,896		270		2,166		3,610		494
Residential mortgage	23,417		17,930		41,347		44,065		2,905
Revolving mortgage	9,998		15,527		25,525		27,948		1,053
Construction and land development - noncommercial	1,294		2,509		3,803		4,620		82
Consumer	1,744		847		2,591		2,872		713
Total non-PCI impaired loans and leases	$	82,789	$	73,161	$	155,950	$	172,656	$	9,866
	December 31, 2017
(Dollars in thousands)	With a recorded allowance		With no recorded allowance		Total		Unpaid principal balance		Related allowance recorded
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	788	$	—	$	788	$	1,110	$	185
Commercial mortgage	39,135		34,520		73,655		78,936		3,648
Other commercial real estate	1,351		506		1,857		2,267		209
Commercial and industrial	6,326		1,648		7,974		10,475		665
Lease financing	1,890		24		1,914		2,571		397
Other	—		521		521		521		—
Residential mortgage	19,135		18,707		37,842		39,946		2,733
Revolving mortgage	5,875		17,895		23,770		25,941		1,085
Construction and land development - noncommercial	592		3,959		4,551		5,224		68
Consumer	2,107		667		2,774		3,043		738
Total non-PCI impaired loans and leases	$	77,199	$	78,447	$	155,646	$	170,034	$	9,728

Non-PCI impaired loans less than $500,000 that are collectively evaluated were $46.9 million and $49.1 million at March 31, 2018 and December 31, 2017, respectively.

The following tables show the average non-PCI impaired loan balance and the interest income recognized by loan class for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018				Three months ended March 31, 2017
(Dollars in thousands)	Average balance		Interest income recognized		Average balance		Interest income recognized
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	1,155	$	11	$	1,055	$	12
Commercial mortgage	72,267		711		75,310		642
Other commercial real estate	1,713		11		1,584		8
Commercial and industrial	7,524		76		11,529		104
Lease financing	2,238		11		1,568		14
Other	—		—		196		2
Residential mortgage	38,724		275		32,963		253
Revolving mortgage	24,792		201		7,969		57
Construction and land development - noncommercial	4,104		48		2,605		33
Consumer	2,508		28		1,900		23
Total non-PCI impaired loans and leases	$	155,025	$	1,372	$	136,679	$	1,148

25

Troubled Debt Restructurings

BancShares accounts for certain loan modifications or restructurings as troubled debt restructurings (TDRs). In general, the modification or restructuring of a loan is considered a TDR if, for economic reasons or legal reasons related to a borrower's financial difficulties, a concession is granted to the borrower that creditors would not otherwise consider. Concessions may relate to the contractual interest rate, maturity date, payment structure or other actions. In accordance with GAAP, loans acquired under ASC 310-30, excluding pooled loans, are not initially considered to be TDRs, but can be classified as such if a modification is made subsequent to acquisition. Subsequent modification of a PCI loan accounted for in a pool that would otherwise meet the definition of a TDR is not reported, or accounted for, as a TDR since pooled PCI loans are excluded from the scope of TDR accounting.

The following table provides a summary of total TDRs by accrual status.

	March 31, 2018						December 31, 2017
(Dollars in thousands)	Accruing		Nonaccruing		Total		Accruing		Nonaccruing		Total
Commercial loans
Construction and land development - commercial	$	948	$	253	$	1,201	$	4,089	$	483	$	4,572
Commercial mortgage	61,444		12,964		74,408		62,358		15,863		78,221
Other commercial real estate	950		491		1,441		1,012		788		1,800
Commercial and industrial	7,000		1,049		8,049		7,598		910		8,508
Lease financing	902		1,066		1,968		722		1,048		1,770
Other	—		—		—		521		—		521
Total commercial TDRs	71,244		15,823		87,067		76,300		19,092		95,392
Noncommercial
Residential mortgage	36,432		9,651		46,083		34,067		9,475		43,542
Revolving mortgage	19,267		5,364		24,631		17,673		5,180		22,853
Construction and land development - noncommercial	2,914		183		3,097		—		—		—
Consumer and other	2,063		529		2,592		2,351		423		2,774
Total noncommercial TDRs	60,676		15,727		76,403		54,091		15,078		69,169
Total TDRs	$	131,920	$	31,550	$	163,470	$	130,391	$	34,170	$	164,561

The majority of TDRs are included in the special mention, substandard or doubtful credit grading categories, which results in more elevated loss expectations when projecting the expected cash flows that are used to determine the allowance for loan losses associated with these loans. When a restructured loan subsequently defaults, it is evaluated and downgraded if appropriate. The more severely graded the loan, the lower the estimated expected cash flows and the greater the allowance recorded. Further, all TDRs are individually evaluated for impairment through a review of collateral values or analysis of cash flows at least annually.

The following table shows the accrual status of non-PCI and PCI TDRs.

(Dollars in thousands)	March 31, 2018		December 31, 2017
Accruing TDRs:
PCI	$	18,380	$	18,163
Non-PCI	113,540		112,228
Total accruing TDRs	131,920		130,391
Nonaccruing TDRs:
PCI	250		272
Non-PCI	31,300		33,898
Total nonaccruing TDRs	31,550		34,170
All TDRs:
PCI	18,630		18,435
Non-PCI	144,840		146,126
Total TDRs	$	163,470	$	164,561

26

The following table provides the types of non-PCI TDRs made during the three months ended March 31, 2018 and March 31, 2017, as well as a summary of loans that were modified as a TDR during the twelve month periods ended March 31, 2018 and March 31, 2017 that subsequently defaulted during the three months ended March 31, 2018 and March 31, 2017. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 90 days past due for TDRs, foreclosure or charge-off, whichever occurs first.

	Three months ended March 31, 2018						Three months ended March 31, 2017
	All restructurings			Restructurings with payment default			All restructurings			Restructurings with payment default
(Dollars in thousands)	Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end
Non-PCI loans and leases
Loan term extension
Commercial mortgage	1	$	305	1	$	305	—	$	—	—	$	—
Other commercial real estate	—	—		—	—		—	—		1	530
Commercial and industrial	3	549		—	—		2	94		—	—
Residential mortgage	—	—		—	—		1	32		1	47
Revolving mortgage	1	57		—	—		—	—		—	—
Consumer	1	21		—	—		2	14		—	—
Total loan term extension	6	932		1	305		5	140		2	577
Below market interest rate
Construction and land development - commercial	—	—		—	—		1	60		—	—
Commercial mortgage	6	1,380		2	47		10	2,512		1	92
Other commercial real estate	—	—		—	—		1	4		—	—
Commercial and industrial	8	361		4	11		3	108		1	—
Lease financing	—	—		—	—		3	839		2	769
Residential mortgage	22	2,189		10	1,277		30	1,543		15	824
Revolving mortgage	25	1,659		11	431		—	—		—	—
Construction and land development - noncommercial	—	—		—	—		2	412		—	—
Consumer	5	71		3	48		2	14		—	—
Other	—	—		—	—		1	143		—	—
Total below market interest rate	66	5,660		30	1,814		53	5,635		19	1,685
Discharged from bankruptcy
Commercial mortgage	1	140		2	502		—	—		1	190
Commercial and industrial	14	474		16	177		—	—		—	—
Lease financing	5	304		2	73		16	227		—	—
Residential mortgage	8	566		6	417		3	140		1	978
Revolving mortgage	5	440		4	193		4	99		9	649
Consumer	13	262		11	183		18	193		10	128
Total discharged from bankruptcy	46	2,186		41	1,545		41	659		21	1,945
Total non-PCI restructurings	118	$	8,778	72	$	3,664	99	$	6,434	42	$	4,207

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The following table provides the types of PCI TDRs made during the three months ended March 31, 2018 and March 31, 2017, as well as a summary of loans that were modified as a TDR during the twelve month periods ended March 31, 2018 and March 31, 2017 that subsequently defaulted during the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31, 2018						Three months ended March 31, 2017
	All restructurings			Restructurings with payment default			All restructurings			Restructurings with payment default
(Dollars in thousands)	Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end
PCI loans
Interest only period provided
Commercial and industrial	1	$	644	—	$	—	—	$	—	—	$	—
Total interest only	1	644		—	—		—	—		—	—
Below market interest rate
Residential mortgage	—	—		—	—		2	181		1	73
Total below market interest rate	—	—		—	—		2	181		1	73
Discharged from bankruptcy
Commercial mortgage	2	1,627		2	1,627		—	—		—	—
Total discharged from bankruptcy	2	1,627		2	1,627		—	—		—	—
Total PCI restructurings	3	$	2,271	2	$	1,627	2	$	181	1	$	73

For the three months ended March 31, 2018 and March 31, 2017, the pre-modification and post-modification outstanding recorded investments of loans modified as TDRs were not materially different.

NOTE F - OTHER REAL ESTATE OWNED (OREO)

The following table explains changes in other real estate owned during the three months ended March 31, 2018 and March 31, 2017.

(Dollars in thousands)	Total
Balance at December 31, 2016	$	61,231
Additions	5,822
Sales	(8,845		)
Write-downs	(1,717		)
Balance at March 31, 2017	$	56,491
Balance at December 31, 2017	$	51,097
Additions	6,582
Sales	(8,380		)
Write-downs	(1,210		)
Balance at March 31, 2018	$	48,089

At March 31, 2018 and December 31, 2017, BancShares had $16.5 million and $19.8 million, respectively, of foreclosed residential real estate property in OREO. The recorded investment in consumer mortgage loans collateralized by residential real estate property in the process of foreclosure was $30.6 million and $26.9 million at March 31, 2018 and December 31, 2017, respectively.

NOTE G - FDIC SHARED-LOSS RECEIVABLE AND PAYABLE

BancShares completed six FDIC-assisted transactions with shared-loss agreements during the period beginning in 2009 through 2011. Prior to its merger into BancShares, Bancorporation completed three FDIC-assisted transactions with shared-loss agreements: Georgian Bank (acquired in 2009); Williamsburg First National Bank (acquired in 2010); and Atlantic Bank & Trust (acquired in 2011).

In 2016 and 2017, FCB entered into agreements with the FDIC to terminate the shared-loss agreements for Venture Bank, Temecula Valley Bank, Sun American Bank, Williamsburg First National Bank, Atlantic Bank & Trust and Colorado Capital Bank. As of

28

March 31, 2018, shared-loss agreements are still active for First Regional Bank (FRB), Georgian Bank (GB) and United Western Bank (UWB). Shared-loss protection remains for single family residential loans acquired from UWB and GB in the amount of $65.5 million. FRB remained in a recovery period, where any recoveries were shared with the FDIC, through March 2018.

BancShares has a receivable from the FDIC for the expected reimbursement of losses on assets covered under the various shared-loss agreements. The shared-loss agreements are subject to interpretation by both the FDIC and BancShares, and disagreements may arise regarding coverage of losses, expenses and contingencies and requests for reimbursement may be delayed or disallowed for noncompliance.

The following table provides changes in the FDIC shared-loss receivable for the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31
(Dollars in thousands)	2018			2017
Beginning balance	$	2,223		$	4,172
Accretion	(421		)	(600		)
Net cash payments to FDIC	—			2,760
Post-acquisition adjustments	1,834			(2,591		)
Termination of FDIC shared-loss agreements	—			240
Ending balance	$	3,636		$	3,981

The shared-loss agreements for two FDIC-assisted transactions, FRB and UWB, include provisions related to payments that may be owed to the FDIC at the termination of the agreements (clawback liability). The clawback liability represents a payment by BancShares to the FDIC if actual cumulative losses on acquired covered assets are lower than the cumulative losses originally estimated by the FDIC at the time of acquisition and is recorded in the Consolidated Balance Sheets as a payable to the FDIC under the relevant shared-loss agreements. As of March 31, 2018 and December 31, 2017, the estimated clawback liability was $102.5 million and $101.3 million, respectively. The clawback liability payment dates for FRB and UWB are March 2020 and March 2021, respectively.

The following table provides changes in the FDIC shared-loss payable for the three months ended March 31, 2018 and March 31, 2017

	Three months ended March 31
(Dollars in thousands)	2018		2017
Beginning balance	$	101,342	$	97,008
Accretion	992		954
Adjustments related to changes in assumptions	132		51
Ending balance	$	102,466	$	98,013

NOTE H - MORTGAGE SERVICING RIGHTS

Our portfolio of residential mortgage loans serviced for third parties was $2.85 billion and $2.81 billion as of March 31, 2018 and December 31, 2017, respectively.  These loans were originated by BancShares and sold to third parties on a non-recourse basis with servicing rights retained.  These retained servicing rights are recorded as a servicing asset and reported in other intangible assets on the Consolidated Balance Sheets. The mortgage servicing rights are initially recorded at fair value and then carried at the lower of amortized cost or fair market value.

The activity of the servicing asset for the three months ended March 31, 2018 and 2017 is presented in the following table:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Beginning balance	$	21,945		$	20,415
Servicing rights originated	1,200			1,702
Amortization	(1,486		)	(1,350		)
Valuation allowance reversal	—			4
Ending balance	$	21,659		$	20,771

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The amortization expense related to mortgage servicing rights, included as a reduction of mortgage income in the Consolidated Statements of Income was $1.5 million and $1.4 million for the three months ended March 31, 2018 and 2017, respectively. Mortgage income for the three months ended March 31, 2018 did not include any impairment compared to an impairment reversal of $4 thousand for the three months ended March 31, 2017.

Contractually specified mortgage servicing fees, late fees, and ancillary fees earned for the three months ended March 31, 2018 and 2017 were $1.9 million and $1.7 million, respectively, and reported in mortgage income in the Consolidated Statements of Income.

Valuation of mortgage servicing rights is performed using a pooling methodology. Similar loans are pooled together and evaluated on a discounted earnings basis to determine the present value of future earnings. Key economic assumptions used to value mortgage servicing rights as of March 31, 2018 and December 31, 2017 were as follows:

	March 31, 2018			December 31, 2017
Discount rate - conventional fixed loans	9.74		%	9.41		%
Discount rate - all loans excluding conventional fixed loans	10.74		%	10.41		%
Weighted average constant prepayment rate	9.15		%	10.93		%
Weighted average cost to service a loan	$	72.8		$	64.03

The discount rate is based on the 10-year U.S. Treasury rate plus 700 basis points for conventional fixed loans and 800 basis points for all other loans. The 700 and 800 basis points are used as a risk premium when calculating the discount rate. The repayment rate is derived from the Public Securities Association Standard Prepayment model. The average cost to service a loan is based on the number of loans serviced and the total costs to service the loans.

NOTE I - REPURCHASE AGREEMENTS

BancShares utilizes securities sold under agreements to repurchase to facilitate the needs of customers and secure wholesale funding needs. Repurchase agreements are transactions whereby BancShares offers to sell to a counterparty an undivided interest in an eligible security at an agreed upon purchase price, and which obligates BancShares to repurchase the security on an agreed upon date at an agreed upon repurchase price plus interest at an agreed upon rate. Securities sold under agreements to repurchase are recorded at the amount of cash received in connection with the transaction and are generally reflected as short-term borrowings on the Consolidated Balance Sheets.

BancShares monitors collateral levels on a continuous basis and maintains records of each transaction specifically describing the applicable security and the counterparty’s fractional interest in that security, and segregates the security from general assets in accordance with regulations governing custodial holdings of securities. The primary risk with repurchase agreements is market risk associated with the investments securing the transactions, as additional collateral may be required based on fair value changes of the underlying investments. Securities pledged as collateral under repurchase agreements are maintained with safekeeping agents. The carrying value of available for sale investment securities pledged as collateral under repurchase agreements was $535.6 million and $684.2 million at March 31, 2018 and December 31, 2017, respectively.

The remaining contractual maturity of the securities sold under agreements to repurchase by class of collateral pledged included in borrowings on the Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017 is presented in the following tables.

	March 31, 2018
	Remaining Contractual Maturity of the Agreements
(Dollars in thousands)	Overnight and continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
U.S. Treasury	$	522,207	$	—	$	—	$	—	$	522,207
Gross amount of recognized liabilities for repurchase agreements									$	522,207
	December 31, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
U.S. Treasury	$	556,171	$	—	$	30,000	$	—	$	586,171
Gross amount of recognized liabilities for repurchase agreements									$	586,171

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NOTE J - ESTIMATED FAIR VALUES

Fair value estimates are intended to represent the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. Where there is no active market for a financial instrument, BancShares has made estimates using discounted cash flows or other valuation techniques. Inputs used in these valuation techniques are subjective in nature, involve uncertainties and require significant judgment and therefore can only be derived within a range of precision. Accordingly, the derived fair value estimates presented below are not necessarily indicative of the amounts BancShares would realize in a current market exchange.

ASC 820, Fair Value Measurements and Disclosures, indicates that assets and liabilities are recorded at fair value according to a fair value hierarchy comprised of three levels. The levels are based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The level within the fair value hierarchy for an asset or liability is based on the highest level of input that is significant to the fair value measurement (with Level 1 considered highest and Level 3 considered lowest). A brief description of each level follows:

• Level 1 values are based on quoted prices for identical instruments in active markets.

• Level 2 values are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market.

• Level 3 values are derived from valuation techniques in which one or more significant inputs or assumptions are not observable in the market. These unobservable inputs and assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation techniques include the use of discounted cash flow models and similar techniques.

BancShares' management reviews any changes to its valuation methodologies to ensure they are appropriate and justified, and refines valuation methodologies as more market-based data becomes available. Transfers between levels of the fair value hierarchy are recognized at the end of the reporting period. There have been no changes during the three months ended March 31, 2018 and March 31, 2017.

The methodologies used to estimate the fair value of financial assets and financial liabilities are discussed below:

Investment securities available for sale. Investment securities available for sale are carried at fair value. U.S. Treasury, government agency and mortgage-backed securities are generally measured at fair value using a third party pricing service. The third party provider evaluates securities based on market data and utilizes pricing models that use a variety of inputs, such as benchmark yields, reported trades, broker-dealer quotes, issuer spreads, benchmark securities, bids and offers. These securities are generally classified as Level 2. Corporate bonds and trust preferred securities are generally measured at fair value based on indicative bids from broker-dealers and are not directly observable. These securities are considered Level 3.

Marketable equity securities. Equity securities are measured at fair value using observable closing prices and the valuation also considers the amount of market activity by examining the trade volume of each security. Equity securities are classified as Level 1 if they are traded on a heavily active market and as Level 2 if the observable closing price is from a less than active market.

Loans held for sale. Certain residential real estate loans are originated to be sold to investors are carried at fair value based on quoted market prices for similar types of loans. Accordingly, the inputs used to calculate fair value of originated residential real estate loans held for sale are classified as Level 2 inputs. Portfolio loans that are subsequently transferred to held for sale to be sold in the secondary market are carried at the lower of amortized cost or fair value. The fair value of the transferred portfolio loans is based on the quoted prices and is considered a Level 1 input.

Net loans and leases (PCI and Non-PCI). Fair value is estimated based on discounted future cash flows using the current interest rates at which loans with similar terms would be made to borrowers of similar credit quality. The inputs used in the fair value measurements for loans and leases are considered Level 3 inputs.

FHLB stock. The carrying amount of FHLB stock is a reasonable estimate of fair value as these securities are not readily marketable and are evaluated for impairment based on the ultimate recoverability of the par value. BancShares considers positive and negative evidence, including the profitability and asset quality of the issuer, dividend payment history and recent redemption experience, when determining the ultimate recoverability of the par value. BancShares believes its investment in FHLB stock is ultimately recoverable at par. The inputs used in the fair value measurement for the FHLB stock are considered Level 2 inputs.

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Mortgage servicing rights. Mortgage servicing rights are carried at the lower of amortized cost or market and are, therefore, carried at fair value only when fair value is less than the asset cost. The fair value of mortgage servicing rights is performed using a pooling methodology. Similar loans are pooled together and a model that relies on discount rates, estimates of prepayment rates and the weighted average cost to service the loans is used to determine the fair value. The inputs used in the fair value measurement for mortgage servicing rights are considered Level 3 inputs.

Deposits. For non-time deposits, carrying value is a reasonable estimate of fair value. The fair value of time deposits is estimated by discounting future cash flows using the interest rates currently offered for deposits of similar remaining maturities. The inputs used in the fair value measurement for deposits are considered Level 2 inputs.    

Long-term obligations. For fixed rate trust preferred securities, the fair values are determined based on recent trades of the actual security if available. For other long-term obligations, fair values are estimated by discounting future cash flows using current interest rates for similar financial instruments. The inputs used in the fair value measurement for long-term obligations are considered Level 2 inputs.

Payable to the FDIC for shared-loss agreements. The fair value of the payable to the FDIC for shared-loss agreements is determined by the projected cash flows based on expected payments to the FDIC in accordance with the shared-loss agreements. Cash flows are discounted using current discount rates to reflect the timing of the estimated amounts due to the FDIC. The inputs used in the fair value measurement for the payable to the FDIC are considered Level 3 inputs.

Off-balance-sheet commitments and contingencies. Carrying amounts are reasonable estimates of the fair values for such financial instruments. Carrying amounts include unamortized fee income and, in some cases, reserves for any credit losses from those financial instruments. These amounts are not material to BancShares' financial position.

For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of March 31, 2018 and December 31, 2017. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk that would cause the fair value to differ from the carrying value. Cash and due from banks is classified on the fair value hierarchy as Level 1. Overnight investments, income earned not collected, short-term borrowings and accrued interest payable are considered Level 2. Lastly, the receivable from the FDIC for shared-loss agreements is designated as Level 3.

(Dollars in thousands)	March 31, 2018				December 31, 2017
	Carrying value		Fair value		Carrying value		Fair value
Cash and due from banks	$	248,139	$	248,139	$	336,150	$	336,150
Overnight investments	1,946,882		1,946,882		1,387,927		1,387,927
Investment securities available for sale	6,857,740		6,857,740		7,180,180		7,180,180
Investment securities held to maturity	74		79		76		81
Marketable equity securities	110,107		110,107		—		—
Loans held for sale	46,660		46,660		51,179		51,179
Net loans and leases	23,388,861		22,672,287		23,374,932		22,257,803
Receivable from the FDIC for shared-loss agreements	3,636		3,636		2,223		2,223
Income earned not collected	96,607		96,607		95,249		95,249
Federal Home Loan Bank stock	20,810		20,810		52,685		52,685
Mortgage servicing rights	21,659		27,512		21,945		26,170
Deposits	29,969,245		29,924,950		29,266,275		29,230,768
Short-term borrowings	554,758		554,758		693,807		693,807
Long-term obligations	194,413		203,061		870,240		852,112
Payable to the FDIC for shared-loss agreements	102,466		103,440		101,342		102,684
Accrued interest payable	1,498		1,498		3,952		3,952

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Among BancShares' assets and liabilities, investment securities available for sale, marketable equity securities and loans held for sale are reported at their fair values on a recurring basis. For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of March 31, 2018 and December 31, 2017.

	March 31, 2018
			Fair value measurements using:
(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	1,553,893	$	—	$	1,553,893	$	—
Government agency	31,909		—		31,909		—
Mortgage-backed securities	5,206,667		—		5,206,667		—
Corporate bonds	59,653		—		—		59,653
Other	5,618		—		—		5,618
Total investment securities available for sale	$	6,857,740	$	—	$	6,792,469	$	65,271
Marketable equity securities	$	110,107	$	21,749	$	88,358	$	—
Loans held for sale	$	46,660	$	—	$	46,660	$	—
	December 31, 2017
			Fair value measurements using:
	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	1,657,864	$	—	$	1,657,864	$	—
Government agency	8,670		—		8,670		—
Mortgage-backed securities	5,340,756		—		5,340,756		—
Equity securities	105,208		19,341		85,867		—
Corporate bonds	59,963		—		59,963		—
Other	7,719		—		7,719		—
Total investment securities available for sale	$	7,180,180	$	19,341	$	7,160,839	$	—
Loans held for sale	$	51,179	$	—	$	51,179	$	—

For the three months ended March 31, 2018, there were transfers from Level 2 to Level 3 of $59.7 million and $5.6 million for corporate bonds and other investment securities available for sale, respectively. The transfers were due to a lack of observable inputs and trade activity for those securities. There were no transfers between levels for the three months ended March 31, 2017.

The following table presents quantitative information about Level 3 fair value measurements for fair value on a recurring basis at March 31, 2018 and December 31, 2017.

(Dollars in thousands)			March 31, 2018
Level 3 assets	Valuation technique	Significant unobservable input	Fair Value
Corporate bonds	Indicative bid provided by broker	Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company	$	59,653
Other	Indicative bid provided by broker	Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company	5,618

Fair Value Option

BancShares has elected the fair value option for residential real estate loans originated to be sold. This election reduces certain timing differences in the Consolidated Statement of Income and better aligns with the management of the portfolio from a business perspective. The changes in fair value are recorded as a component of mortgage income and were a loss of $455 thousand and a gain of $3.2 million for the three months ended March 31, 2018 and March 31, 2017, respectively.

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The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for residential real estate originated for sale measured at fair value as of March 31, 2018 and December 31, 2017.

	March 31, 2018
(Dollars in thousands)	Fair Value		Aggregate Unpaid Principal Balance		Difference
Originated loans held for sale	$	46,660	$	45,732	$	928
	December 31, 2017
	Fair Value		Aggregate Unpaid Principal Balance		Difference
Originated loans held for sale	$	51,179	$	49,796	$	1,383

No originated loans held for sale were 90 or more days past due or on nonaccrual status as of March 31, 2018 or December 31, 2017.

Certain other assets are adjusted to their fair value on a nonrecurring basis, including impaired loans, OREO, and goodwill, which are periodically tested for impairment, and mortgage servicing rights, which are carried at the lower of amortized cost or market. Non-impaired loans held for investment, deposits, short-term borrowings and long-term obligations are not reported at fair value.

Impaired loans are deemed to be at fair value if an associated allowance or current period charge-off has been recorded. The value of impaired loans is determined by either collateral valuations or discounted present value of the expected cash flow calculations. Collateral values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 6 and 11 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Expected cash flows are determined using expected payment information at the individual loan level, discounted using the effective interest rate. The effective interest rate generally ranges between 2 and 18 percent.

OREO that has been acquired or written down in the current year is deemed to be at fair value, which uses asset valuations. Asset values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 6 and 11 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Changes to the value of the assets between scheduled valuation dates are monitored through continued communication with brokers and monthly reviews by the asset manager assigned to each asset. If there are any significant changes in the market or the subject property, valuations are adjusted or new appraisals ordered to ensure the reported values reflect the most current information.

Mortgage servicing rights are carried at the lower of cost or market and are, therefore, carried at fair value only when fair value is less than the amortized asset cost. The fair value of mortgage servicing rights is performed using a pooling methodology. Similar loans are pooled together and a discounted cash flow model, which takes into consideration discount rates, prepayment rates, and the weighted average cost to service the loans, is used to determine the fair value.

For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of March 31, 2018 and December 31, 2017.

	March 31, 2018
			Fair value measurements using:
(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Impaired loans	$	73,892	$	—	$	—	$	73,892
Other real estate remeasured during current year	11,695		—		—		11,695
	December 31, 2017
			Fair value measurements using:
	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Impaired loans	$	72,539	$	—	$	—	$	72,539
Other real estate remeasured during current year	40,167		—		—		40,167

No financial liabilities were carried at fair value on a nonrecurring basis as of March 31, 2018 and December 31, 2017.

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NOTE K - EMPLOYEE BENEFIT PLANS

BancShares sponsors noncontributory defined benefit pension plans for its qualifying employees (BancShares Plan) and former First Citizens Bancorporation, Inc. employees (Bancorporation Plan). The service cost component of net periodic benefit cost is included in salaries and wages while all other non-service cost components are included in other noninterest expense.

BancShares Plan

For the three months ended March 31, 2018 and 2017, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Service cost	$	3,429		$	3,376
Interest cost	7,057			7,380
Expected return on assets	(11,957		)	(10,698		)
Amortization of prior service cost	20			52
Amortization of net actuarial loss	3,246			2,234
Net periodic benefit cost	$	1,795		$	2,344

Bancorporation Plan

For the three months ended March 31, 2018 and 2017, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Service cost	$	662		$	671
Interest cost	1,587			1,683
Expected return on assets	(3,106		)	(2,796		)
Amortization of net actuarial loss	71			214
Net periodic benefit cost	$	(786	)	$	(228	)

No contributions were made during the three months ended March 31, 2018 to the BancShares or Bancorporation pension plans. Management evaluates the need for its pension plan contributions on a periodic basis based upon numerous factors including, but not limited to, the funded status of and returns to the BancShares Plan and Bancorporation Plan, discount rates and the current economic environment.

NOTE L - COMMITMENTS AND CONTINGENCIES

To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments include commitments to extend credit, standby letters of credit and recourse obligations on mortgage loans sold. These instruments involve elements of credit, interest rate or liquidity risk.

Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires that collateral be pledged to secure the commitment, including cash deposits, securities and other assets.

Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those commitments are primarily issued to support public and private borrowing arrangements, and the fair value of those commitments is not material. To mitigate its risk, BancShares’ credit policies govern the issuance of standby letters of credit. The credit risk related to the issuance of these letters of credit is essentially the same as that involved in extending loans to clients and, therefore, these letters of credit are collateralized when necessary.

The following table presents the commitments to extend credit and unfunded commitments as of March 31, 2018 and December 31, 2017:

(Dollars in thousands)	March 31, 2018		December 31, 2017
Unused commitments to extend credit	$	9,994,802	$	9,629,365
Standby letters of credit	81,059		81,530
Unfunded commitments for investments in affordable housing projects	63,803		61,819

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Affordable housing project investments were $134.4 million and $128.0 million as of March 31, 2018 and December 31, 2017, respectively, and are included in other assets on the Consolidated Balance Sheets.

Pursuant to standard representations and warranties relating to residential mortgage loan sales sold on a non-recourse basis, contingent obligations exist for various events that may occur following the loan sale. If underwriting or documentation deficiencies are discovered at any point in the life of the loan or if the loan fails to perform per the terms of the loan purchase agreement, typically within 180 days from the date of sale, the investor may require BancShares to repurchase the loan or to repay a portion of the sale proceeds. Other liabilities included reserves of $867 thousand and $882 thousand as of March 31, 2018 and December 31, 2017, respectively, for estimated losses arising from these standard representation and warranty provisions.

BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts are claimed. BancShares is also exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various merger transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements.

NOTE M - ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME

Accumulated other comprehensive loss included the following as of March 31, 2018 and December 31, 2017:

	March 31, 2018									December 31, 2017
(Dollars in thousands)	Accumulated other comprehensive loss			Deferred tax benefit			Accumulated other comprehensive loss, net of tax			Accumulated other comprehensive loss			Deferred tax benefit			Accumulated other comprehensive loss, net of tax
Unrealized losses on securities available for sale	$	(157,460	)	$	(36,217	)	$	(121,243	)	$	(48,834	)	$	(17,889	)	$	(30,945	)
Funded status of defined benefit plans	(141,662		)	(32,582		)	(109,080		)	(144,999		)	(53,650		)	(91,349		)
Total	$	(299,122	)	$	(68,799	)	$	(230,323	)	$	(193,833	)	$	(71,539	)	$	(122,294	)

The following table highlights changes in accumulated other comprehensive (loss) income by component for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018
(Dollars in thousands)	Unrealized (losses) gains on securities available for sale1			Defined benefit pension items1			Total
Beginning balance	$	(30,945	)	$	(91,349	)	$	(122,294	)
Cumulative effect adjustments	(29,752		)	(20,300		)	(50,052		)
Other comprehensive loss before reclassifications	(60,546		)	—			(60,546		)
Amounts reclassified from accumulated other comprehensive (loss) income	—			2,569			2,569
Net current period other comprehensive (loss) income	(60,546		)	2,569			(57,977		)
Ending balance	$	(121,243	)	$	(109,080	)	$	(230,323	)
	Three months ended March 31, 2017
	Unrealized (losses) gains on securities available for sale1			Defined benefit pension items1			Total
Beginning balance	$	(45,875	)	$	(89,317	)	$	(135,192	)
Other comprehensive income before reclassifications	22,677			—			22,677
Amounts reclassified from accumulated other comprehensive (loss) income	15			1,559			1,574
Net current period other comprehensive income	22,692			1,559			24,251
Ending balance	$	(23,183	)	$	(87,758	)	$	(110,941	)

¹ All amounts are net of tax. Amounts in parentheses indicate debits.

36

The following table presents the amounts reclassified from accumulated other comprehensive (loss) income and the line item affected in the statement where net income is presented for the three months ended March 31, 2018 and March 31, 2017:

(Dollars in thousands)	Three months ended March 31, 2018
Details about accumulated other comprehensive income (loss)	Amounts reclassified from accumulated other comprehensive income (loss)1			Affected line item in the statement where net income is presented
Amortization of defined benefit pension items
Prior service costs	$	(20	)	Salaries and wages
Actuarial losses	(3,317		)	Other
	(3,337		)	Income before income taxes
	768			Income taxes
	$	(2,569	)	Net income
Total reclassifications for the period	$	(2,569	)
	Three months ended March 31, 2017
Details about accumulated other comprehensive income (loss)	Amounts reclassified from accumulated other comprehensive income (loss)1			Affected line item in the statement where net income is presented
Unrealized gains and losses on securities available for sale	$	(24	)	Securities losses, net
	9			Income taxes
	$	(15	)	Net income
Amortization of defined benefit pension items
Prior service costs	$	(52	)	Salaries and wages
Actuarial losses	(2,448		)	Other
	(2,500		)	Income before income taxes
	941			Income taxes
	$	(1,559	)	Net income
Total reclassifications for the period	$	(1,574	)

¹ Amounts in parentheses indicate debits to profit/loss.

37

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Management’s discussion and analysis (MD&A) of earnings and related financial data are presented to assist in understanding the financial condition and results of operations of First Citizens BancShares, Inc. and Subsidiaries (BancShares). This discussion and analysis should be read in conjunction with the unaudited consolidated financial statements and related notes presented within this report along with our financial statements and related MD&A of financial condition and results of operations included in our 2017 Annual Report on Form 10-K. Intercompany accounts and transactions have been eliminated. Although certain amounts for prior years have been reclassified to conform to statement presentations for 2018, the reclassifications had no effect on shareholders’ equity or net income as previously reported. Unless otherwise noted, the terms “we,” “us” and “BancShares” refer to the consolidated financial position and consolidated results of operations for BancShares.

EXECUTIVE OVERVIEW

BancShares’ earnings and cash flows are primarily derived from our commercial and retail banking activities. We gather deposits from retail and commercial customers and also secure funding through various non-deposit sources. We invest the liquidity generated from these funding sources in interest-earning assets, including loans and leases, investment securities and overnight investments. We also invest in bank premises, hardware, software, furniture and equipment used to conduct our commercial and retail banking business. We provide treasury services products, cardholder and merchant services, wealth management services and various other products and services typically offered by commercial banks.

BancShares conducts its banking operations through its wholly-owned subsidiary First-Citizens Bank & Trust Company (FCB), a state-chartered bank organized under the laws of the state of North Carolina.

Interest rates have presented significant challenges to commercial banks' efforts to generate earnings and shareholder value. Our strategy continues to focus on maintaining an interest rate risk profile that will benefit net interest income in a rising rate environment. Management drives to this goal by focusing on core customer deposits and loans in the targeted interest rate risk profile. Additionally, our initiatives focus on growth of noninterest income sources, control of noninterest expenses, optimization of our branch network, and further enhancements to our technology and delivery channels. Refer to our Form 10-K for the year ended December 31, 2017 for further discussion of our strategy.

Significant Events in 2018

On May 1, 2018, FCB completed the merger of Tampa, Florida-based HomeBancorp, Inc. (HomeBancorp) and its subsidiary, HomeBanc, into FCB. Under the terms of the merger agreement, cash consideration of $15.03 was paid to the shareholders of HomeBancorp for each share of HomeBancorp's common stock, with total consideration paid of $113.7 million. As of March 31, 2018, HomeBancorp had $912.6 million in consolidated assets, $597.7 million in loans and $647.1 million in deposits.

RECENT ECONOMIC AND INDUSTRY DEVELOPMENTS

Various external factors influence the focus of our business efforts and the results of our operations can change significantly based on those external factors. First quarter2018 national economic results indicate solid labor market conditions and strong gains in employment, counterpoised by moderated growth rates in household spending and business capital spending. The national unemployment rate in March 2018 remained unchanged at 4.1 percent compared to December 2017. According to the U.S. Department of Labor, the U.S. economy added approximately 605,000 new nonfarm payroll jobs during the first quarter of 2018. The U.S. housing market remains stable as a result of solid housing demand fueled by low mortgage interest rates, economic growth and job creation.

The Federal Reserve’s Federal Open Market Committee (FOMC) indicated in the first quarter that the U.S. labor market continued to strengthen and economic activity has been rising at a moderate rate. In view of realized and expected labor market conditions and inflation, the FOMC decided to raise the target range for the federal funds rate by 25 basis points. In determining the timing and size of future adjustments to the target range for the federal funds rates, the FOMC will assess realized and expected economic conditions relative to its objectives of maximum employment and 2.0 percent inflation. The FOMC expects that economic activity will expand at a moderate pace and labor market conditions will remain strong with further gradual increases in the federal funds rate.

The trends in the banking industry are similar to those of the broader economy as shown in the latest national banking results from the fourth quarter of 2017. FDIC-insured institutions reported a 40.9 percent decrease in net income compared to the fourth quarter of 2016 as a result of higher income taxes, reflecting income tax effects from the Tax Cuts and Jobs Act of 2017, higher noninterest expense and increased loan-loss provisions. Excluding changes from the income tax effects, estimated net income for the fourth quarter of 2017 would have decreased 2.3 percent compared to the same period in 2016. Banking industry average net interest margin was 3.31 percent in the fourth quarter of 2017, up from 3.16 percent in the fourth quarter of 2016. This is the highest quarterly net interest margin for the industry since fourth quarter of 2012. Total loans and leases increased by 1.7 percent

38

from the third quarter of 2017 due to growth in all major loan categories with the largest increases seen in credit cards, commercial and industrial loans and residential mortgage loans.

EARNINGS PERFORMANCE SUMMARY

BancShares' consolidated net income for the first quarter of 2018 was $100.2 million, or $8.35 per share, compared to $54.4 million, or $4.53 per share, for the fourth quarter of 2017, and $67.6 million, or $5.63 per share, for the corresponding period of 2017. BancShares’ current quarter results generated an annualized return on average assets of 1.19 percent and an annualized return on average equity of 12.20 percent, compared to respective returns of 0.62 percent and 6.48 percent for the fourth quarter of 2017, and 0.82 percent and 8.96 percent for the first quarter of 2017. Net interest margin for the first quarter of 2018 was 3.57 percent, compared to 3.34 percent for the fourth quarter of 2017 and 3.25 percent for the first quarter of the prior year.

Earnings improvement for the comparative quarters was primarily driven by loan growth and improved loan and investment securities yields contributing to improved interest income and margins. Growth in several noninterest income categories also contributed to this quarter's strong results. Noninterest income for the first quarter of 2018 included a pre-tax gain of $25.7 million resulting from extinguishment of eight Federal Home Loan Bank (FHLB) debt obligations totaling $675.0 million. Current quarter earnings also benefited from a reduction in the statutory federal tax rate to 21% effective January 1, 2018 as a result of the Tax Cuts and Jobs Act of 2017 (Tax Act), which was enacted on December 22, 2017. The Tax Act resulted in additional income tax expense of $25.8 million for the fourth quarter of 2017 primarily related to the re-measurement of deferred taxes. Earnings for the first quarter of 2017 included a pre-tax acquisition gain of $12.0 million recognized in connection with the January 13, 2017, FDIC-assisted transaction involving certain assets and liabilities assumed of Harvest Community Bank (HCB) of Pennsville, New Jersey.

Key highlights in the first quarter of 2018 include:

• Since December 31, 2017, originated loans increased $74.3 million, or by 1.32% on an annualized basis, primarily due to growth in the commercial mortgage portfolio.

• Deposits increased $703.0 million, or by 9.7 percent on an annualized basis, from December 31, 2017, primarily due to organic growth in demand deposit and interest-bearing savings and checking account balances.

• Net interest income increased $9.7 million, or by 3.5 percent, compared to the fourth quarter of 2017. The increase was primarily due to higher non-purchased credit impaired (non-PCI) loan balances, higher loan and investment yields and a decline in interest expense.

• The taxable-equivalent net interest margin increased 23 basis points to 3.57 percent, compared to the fourth quarter of 2017, primarily due to improved loan and investment yields and higher loan balances.

• BancShares remained well capitalized under Basel III capital requirements with a Tier 1 risk-based capital ratio and common equity Tier 1 ratio of 13.38 percent, total risk-based capital ratio of 14.70 percent and leverage capital ratio of 10.02 percent at March 31, 2018.

39

Table 1

Selected Quarterly Data

	2018			2017
	First			Fourth				Third			Second			First
(Dollars in thousands, except share data)	Quarter			Quarter				Quarter			Quarter			Quarter
SUMMARY OF OPERATIONS
Interest income	$	292,601		$	285,958			$	284,333		$	272,542		$	260,857
Interest expense	8,164			11,189				11,158			10,933			10,514
Net interest income	284,437			274,769				273,175			261,609			250,343
Provision (credit) for loan and lease losses	7,605			(2,809		)		7,946			12,324			8,231
Net interest income after provision for loan and lease losses	276,832			277,578				265,229			249,285			242,112
Gain on acquisitions	—			—				—			122,728			12,017
Noninterest income excluding gain on acquisitions	122,684			108,606				95,850			95,132			87,630
Noninterest expense	268,063			263,073				257,430			255,266			236,700
Income before income taxes	131,453			123,111				103,649			211,879			105,059
Income taxes	31,222			68,704				36,585			77,219			37,438
Net income	$	100,231		$	54,407			$	67,064		$	134,660		$	67,621
Net interest income, taxable equivalent	$	285,248		$	276,002			$	274,272		$	262,549		$	251,593
PER SHARE DATA
Net income	$	8.35		$	4.53			$	5.58		$	11.21		$	5.63
Cash dividends	0.35			0.35				0.30			0.30			0.30
Market price at period end (Class A)	413.24			403.00				373.89			372.70			335.37
Book value at period end	280.77			277.60				275.91			269.75			258.17
SELECTED QUARTERLY AVERAGE BALANCES
Total assets	$	34,267,495		$	34,864,720			$	34,590,503		$	34,243,527		$	33,494,500
Investment securities	7,053,001			7,044,534				6,906,345			7,112,267			7,084,986
Loans and leases (1)	23,666,098			23,360,235				22,997,195			22,575,323			21,951,444
Interest-earning assets	32,320,431			32,874,233				32,555,597			32,104,717			31,298,970
Deposits	29,472,125			29,525,843				29,319,384			29,087,852			28,531,166
Long-term obligations	404,065			866,198				887,948			799,319			816,953
Interest-bearing liabilities	19,031,404			19,425,404				19,484,663			19,729,956			19,669,075
Shareholders' equity	$	3,333,114		$	3,329,562			$	3,284,044		$	3,159,004		$	3,061,099
Shares outstanding	12,010,405			12,010,405				12,010,405			12,010,405			12,010,405
SELECTED QUARTER-END BALANCES
Total assets	$	34,436,437		$	34,527,512			$	34,584,154		$	34,769,850		$	33,928,405
Investment securities	6,967,921			7,180,256				6,992,955			6,596,530			7,029,944
Loans and leases:
PCI	703,837			762,998				834,167			894,863			848,816
Non-PCI	22,908,140			22,833,827				22,314,906			21,976,602			21,057,633
Deposits	29,969,245			29,266,275				29,333,949			29,456,338			29,002,768
Long-term obligations	194,413			870,240				866,123			879,957			727,500
Shareholders' equity	$	3,372,114		$	3,334,064			$	3,313,831		$	3,239,851		$	3,100,696
Shares outstanding	12,010,405			12,010,405				12,010,405			12,010,405			12,010,405
SELECTED RATIOS AND OTHER DATA
Rate of return on average assets (annualized)	1.19		%	0.62			%	0.77		%	1.58		%	0.82
Rate of return on average shareholders' equity (annualized)	12.20			6.48				8.10			17.10			8.96
Net yield on interest-earning assets (taxable equivalent)	3.57			3.34				3.35			3.28			3.25
Allowance for loan and lease losses to total loans and leases:
PCI	1.75			1.31				1.55			1.51			1.29
Non-PCI	0.92			0.93				0.98			0.98			1.00
Total	0.94			0.94				1.00			1.00			1.01
Ratio of total nonperforming assets to total loans, leases and other real estate owned	0.59			0.61				0.63			0.65			0.66
Tier 1 risk-based capital ratio	13.38			12.88				12.95			12.69			12.57
Common equity Tier 1 ratio	13.38			12.88				12.95			12.69			12.57
Total risk-based capital ratio	14.70			14.21				14.34			14.07			13.99
Leverage capital ratio	10.02			9.47				9.43			9.33			9.15
Dividend payout ratio	4.19			7.73				5.38			2.68			5.33
Average loans and leases to average deposits	80.30			79.12				78.44			77.61			76.94

⁽¹⁾ Average loan and lease balances include PCI loans, non-PCI loans and leases, loans held for sale and nonaccrual loans and leases.

40

BUSINESS COMBINATIONS

On May 1,2018, FCB completed the merger of Tampa, Florida-based HomeBancorp, Inc. (HomeBancorp) and its subsidiary, HomeBanc, into FCB. Under the terms of the merger agreement, cash consideration of $15.03 was paid to the shareholders of HomeBancorp for each share of HomeBancorp's common stock, with total consideration paid of $113.7 million. The merger will allow FCB to expand its footprint in Florida by entering into two new markets in Tampa and Orlando. As of March 31, 2018, HomeBancorp had $912.6 million in consolidated assets, $597.7 million in loans and $647.1 million in deposits. Due to the close proximity of the acquisition date and the date that BancShares' financial statements were issued, preliminary fair value estimates are not available.

FDIC-Assisted Transactions

BancShares completed eleven FDIC-assisted transactions during the period beginning in 2009 through 2017. These transactions provided us significant contributions to capital and earnings. Prior to its merger into BancShares in 2014, First Citizens Bancorporation, Inc. (Bancorporation) completed three FDIC-assisted transactions: Georgian Bank of Atlanta, Georgia (acquired in 2009); Williamsburg First National Bank of Williamsburg, South Carolina (acquired in 2010); and Atlantic Bank & Trust of Charleston, South Carolina (acquired in 2011). Nine of the fourteen FDIC-assisted transactions (including the three completed by Bancorporation) included shared-loss agreements that, for their terms, protect us from a substantial portion of the credit and asset quality risk we would otherwise incur.

In 2016 and 2017, FCB entered into agreements with the FDIC to terminate the shared-loss agreements for Venture Bank, Temecula Valley Bank, Sun American Bank, Williamsburg First National Bank, Atlantic Bank & Trust and Colorado Capital Bank. As of March 31, 2018, shared-loss agreements are still active for First Regional Bank (FRB), Georgian Bank (GB) and United Western Bank (UWB). Shared-loss protection remains for single family residential loans acquired from UWB and GB in the amount of $65.5 million. FRB remained in a recovery period, where any recoveries were shared with the FDIC, through March 2020.

41

Table 2

Consolidated Quarter-to-Date Average Taxable-Equivalent Balance Sheets

	Three months ended
	March 31, 2018							December 31, 2017							March 31, 2017
				Interest							Interest							Interest
	Average			Income/		Yield/		Average			Income/		Yield/		Average			Income/		Yield/
(Dollars in thousands)	Balance			Expense		Rate		Balance			Expense		Rate		Balance			Expense		Rate
Assets
Loans and leases	$	23,666,098		$	252,627	4.32	%	$	23,360,235		$	248,151	4.22	%	$	21,951,444		$	227,792	4.20	%
Investment securities:
U. S. Treasury	1,567,388			6,774		1.75		1,627,968			4,784		1.17		1,644,598			4,199		1.04
Government agency	14,952			100		2.67		9,659			69		2.85		53,545			205		1.53
Mortgage-backed securities	5,295,273			27,093		2.05		5,233,293			25,351		1.94		5,241,296			24,322		1.86
Corporate bonds and other	66,009			1,010		6.12		63,911			991		6.20		57,104			980		6.87
Marketable equity securities	109,379			209		0.77		109,703			246		0.89		88,443			133		0.61
Total investment securities	7,053,001			35,186		2.00		7,044,534			31,441		1.78		7,084,986			29,839		1.69
Overnight investments	1,601,332			5,599		1.42		2,469,464			7,599		1.22		2,262,540			4,476		0.80
Total interest-earning assets	32,320,431			$	293,412	3.67	%	32,874,233			$	287,191	3.47	%	31,298,970			$	262,107	3.39	%
Cash and due from banks	299,052							316,851							496,929
Premises and equipment	1,142,704							1,137,075							1,130,049
FDIC shared-loss receivable	3,376							5,104							5,456
Allowance for loan and lease losses	(221,690		)					(232,653		)					(220,811		)
Other real estate owned	49,568							52,103							60,034
Other assets	674,054							712,007							723,873
Total assets	$	34,267,495						$	34,864,720						$	33,494,500
Liabilities
Interest-bearing deposits:
Checking with interest	$	5,091,670		$	293	0.02	%	$	5,028,978		$	262	0.02	%	$	4,834,779		$	252	0.02	%
Savings	2,378,499			171		0.03		2,337,993			172		0.03		2,160,689			184		0.03
Money market accounts	8,139,405			1,749		0.09		8,047,691			1,732		0.09		8,343,092			1,859		0.09
Time deposits	2,340,698			1,543		0.27		2,421,749			1,623		0.27		2,815,682			2,141		0.31
Total interest-bearing deposits	17,950,272			3,756		0.08		17,836,411			3,789		0.08		18,154,242			4,436		0.10
Repurchase agreements	585,627			548		0.37		615,244			622		0.40		669,923			404		0.24
Other short-term borrowings	91,440			886		3.88		107,551			1,031		3.77		27,957			176		2.51
Long-term obligations	404,065			2,974		2.94		866,198			5,747		2.61		816,953			5,498		2.69
Total interest-bearing liabilities	19,031,404			8,164		0.17		19,425,404			11,189		0.23		19,669,075			10,514		0.22
Noninterest-bearing deposits	11,521,853							11,689,432							10,376,924
Other liabilities	381,124							420,322							387,402
Shareholders' equity	3,333,114							3,329,562							3,061,099
Total liabilities and shareholders' equity	$	34,267,495						$	34,864,720						$	33,494,500
Interest rate spread						3.50	%						3.24	%						3.17	%
Net interest income and net yield on interest-earning assets				$	285,248	3.57	%				$	276,002	3.34	%				$	251,593	3.25	%

Loans and leases include PCI loans, non-PCI loans, nonaccrual loans and loans held for sale. Yields related to loans, leases and securities exempt from both federal and state income taxes, federal income taxes only, or state income taxes only are stated on a taxable-equivalent basis assuming statutory federal income tax rates of 21.0 percent, 35.0 percent and 35.0 percent as well as state income tax rates of 3.4 percent, 3.1 percent and 3.1 percent for the three months ended March 31, 2018, December 31, 2017 and March 31, 2017, respectively. The taxable-equivalent adjustment was $811, $1,233 and $1,250 for the three months ended March 31, 2018, December 31, 2017 and March 31, 2017, respectively.

42

Table 3

Changes in Consolidated Taxable Equivalent Net Interest Income

	Three months ended March 31, 2018
	Change from prior year period due to:
(Dollars in thousands)	Volume			Yield/Rate			Total Change
Assets
Loans and leases	$	18,049		$	6,786		$	24,835
Investment securities:
U. S. Treasury	(251		)	2,826			2,575
Government agency	(203		)	98			(105		)
Mortgage-backed securities	266			2,505			2,771
Corporate bonds and other	145			(115		)	30
Marketable equity securities	36			40			76
Total investment securities	(7		)	5,354			5,347
Overnight investments	(1,820		)	2,943			1,123
Total interest-earning assets	$	16,222		$	15,083		$	31,305
Liabilities
Interest-bearing deposits:
Checking with interest	$	27		$	14		$	41
Savings	2			(15		)	(13		)
Money market accounts	(78		)	(32		)	(110		)
Time deposits	(342		)	(256		)	(598		)
Total interest-bearing deposits	(391		)	(289		)	(680		)
Repurchase agreements	(60		)	204			144
Other short-term borrowings	504			206			710
Long-term obligations	(2,906		)	382			(2,524		)
Total interest-bearing liabilities	(2,853		)	503			(2,350		)
Change in net interest income	$	19,075		$	14,580		$	33,655

The rate/volume variance is allocated equally between the changes in volume and rate.

RESULTS OF OPERATIONS

Net Interest Income and Margin

First Quarter 2018

Compared to the fourth quarter of 2017, net interest income increased $9.7 million, or by 3.5 percent, to $284.4 million for the first quarter of 2018. On a taxable-equivalent basis, net interest income increased $9.2 million, or by 3.3 percent, to $285.2 million during the first quarter of 2017. The increase was primarily due to higher non-PCI loan interest income of $4.7 million from improved yields and higher loan balances and an increase in investment securities interest income of $3.7 million resulting from higher investment yields. A $3.0 million decrease in interest expense as a result of lower borrowing balances and lower interest bearing deposit costs also contributed to the improvement in net interest income. These favorable impacts were offset by a decrease in interest income earned on overnight investments of $2.0 million primarily due to lower balances.

Compared to the first quarter of 2017, net interest income increased $34.1 million, or by 13.6 percent. On a taxable-equivalent basis, net interest income increased $33.7 million, or by 13.4 percent, to $285.2 million during the first quarter of 2017. The increase was primarily due to a $26.8 million increase in non-PCI loan interest income resulting from originated loan growth and improved yields as well as the contribution from the Guaranty Bank of Milwaukee, Wisconsin (Guaranty) acquisition in the second quarter of 2017. Also contributing to the improvement in net interest income was an increase in investment securities interest income of $5.3 million due to improved yields, an increase in overnight investments interest income of $1.1 million and a decline in interest expense of $2.4 million. These positive impacts were partially offset by a decline in PCI loan interest income of $1.5 million as a result of continued PCI loan portfolio run-off.

The taxable-equivalent net interest margin was 3.57 percent for the first quarter of 2018, an increase of 23 basis points from the fourth quarter of 2017 and an increase of 32 basis points from the same quarter in the prior year. The margin improvement for both periods was primarily due to improved loan and investment yields and higher loan balances.

For the first quarter of 2018, average interest earning assets decreased by $553.8 million since the fourth quarter of 2017, reflecting a $868.1 million decrease in average overnight investments primarily related to the use of funds for the extinguishment of eight

43

FHLB debt obligations totaling $675.0 million, offset by a $305.9 million increase in average loans outstanding, due to originated loan growth, and a $8.4 million increase in average investment securities. For the first quarter of 2018, average interest earning assets increased by $1.02 billion compared to the same quarter in the prior year. Within interest-earning assets, loans experienced a $1.71 billion net increase primarily due to originated loan growth and the Guaranty transaction. Offsetting this increase were decreases in average overnight investments of $661.2 million primarily related to the use of funds for the extinguishment of debt obligations and average investment securities of $32.0 million. The rate on interest-earning assets was 3.67 percent, an increase from 3.47 percent and 3.39 percent for the fourth and first quarters of 2017, respectively.

For the first quarter of 2018, average interest-bearing liabilities decreased by $393.9 million since the fourth quarter of 2017, due to a $462.1 million decrease in average long-term obligations resulting from the extinguishment of eight FHLB debt obligations totaling $675.0 million in the first quarter of 2018 and a $45.7 million decrease in average short-term borrowings. These decreases were offset by a $113.9 million increase in average interest-bearing deposits resulting from organic growth. For the first quarter of 2018, average interest-bearing liabilities decreased $637.7 million compared to the same quarter in the prior year due to decreases in average long-term obligations of $412.9 million, average interest-bearing deposits of $204.0 million and average short-term borrowings of $20.8 million. The rate on interest-bearing liabilities was 0.17 percent, a decrease from 0.23 percent and 0.22 percent for the fourth and first quarters of 2017, respectively.

Noninterest Income

Table 4

Noninterest Income

	Three months ended
(Dollars in thousands)	March 31, 2018			December 31, 2017			March 31, 2017
Gain on acquisitions	$	—		$	—		$	12,017
Cardholder services	14,782			14,728			11,907
Merchant services	6,177			5,593			6,693
Service charges on deposit accounts	26,543			27,246			22,142
Wealth management services	23,569			22,603			20,962
Debt securities losses, net	—			(371		)	(24		)
Marketable equity securities gains, net	971			—			—
Other service charges and fees	7,480			7,019			7,601
Mortgage income	4,237			3,934			7,576
Insurance commissions	3,776			3,450			3,558
ATM income	2,171			2,261			1,773
Adjustments to FDIC receivable for shared-loss agreements	(1,478		)	(1,561		)	(1,628		)
Net impact from FDIC shared-loss termination	—			—			(45		)
Recoveries of PCI loans previously charged off	5,693			6,342			5,224
Gain on extinguishment of debt	25,814			—			—
Other	2,949			17,362			1,891
Total noninterest income	$	122,684		$	108,606		$	99,647

Noninterest income is an essential component of our total revenue and is critical to our ability to sustain adequate profitability levels. The primary sources of noninterest income have traditionally consisted of gains on acquisitions, gains on the sale of investment securities as well as fees and service charges generated from cardholder services, merchant services, deposit accounts, wealth management services and mortgage lending and servicing. Recoveries on PCI loans that have been previously charged-off are additional sources of noninterest income.

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Total noninterest income for the first quarter of 2018 was $122.7 million, compared to $108.6 million for the fourth quarter of 2017, an increase of $14.1 million, or by 12.96%. The most significant components of the change were as follows:

• Gain on extinguishment of debt was $25.8 million for the first quarter of 2018, primarily due to a $25.7 million gain resulting from extinguishment of eight Federal Home Loan Bank debt obligations totaling $675.0 million.

• Wealth management fees increased by $1.0 million primarily due to higher volume.

• Gain related to the early termination of two forward-starting advances was $12.5 million in the fourth quarter of 2017.

Noninterest income for the first quarter of 2018 was $122.7 million, compared to $99.6 million for the same period of 2017, an increase of $23.0 million, or by 23.12%. Excluding acquisition gains of $12.0 million on the Guaranty acquisition in the first quarter of 2017, total noninterest income increased $35.1 million, or by 40.00%. The increase was primarily attributable to the following drivers:

• Gain on extinguishment of debt was $25.8 million for the first quarter of 2018, primarily due to a $25.7 million gain resulting from extinguishment of eight Federal Home Loan Bank debt obligations totaling $675.0 million.

• Service charges on deposit accounts increased by $4.4 million primarily related to the Guaranty acquisition.

• Wealth management income increased by $2.6 million primarily due to higher trust income and growth in assets under management.

• Cardholder and merchant income increased by $2.4 million due to higher sales volume and customer growth within those business lines.

• Mortgage income decreased by $3.3 million resulting from lower hedge income primarily due to higher interest rates related to lock commitments, partially offset by higher pipeline balances.

Noninterest Expense

The primary components of noninterest expense are salaries and related employee benefits, occupancy costs, facilities and equipment expense.

Table 5

Noninterest Expense

	Three months ended
(Dollars in thousands)	March 31, 2018		December 31, 2017		March 31, 2017
Salaries and wages	$	129,203	$	127,534	$	116,362
Employee benefits	32,091		28,000		27,178
Occupancy expense	27,954		27,275		24,762
Equipment expense	24,974		24,349		24,588
FDIC insurance expense	5,733		5,444		5,593
Collection and foreclosure-related expenses	4,146		4,825		3,763
Merger-related expenses	598		767		833
Processing fees paid to third parties	8,196		6,749		4,316
Telecommunications	2,690		2,109		3,612
Consultant expense	3,006		5,750		1,879
Advertising expense	2,551		2,991		2,500
Core deposit intangible amortization	4,142		4,337		3,921
Other	22,779		22,943		17,393
Total noninterest expense	$	268,063	$	263,073	$	236,700

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Noninterest expense was $268.1 million in the first quarter of 2018, compared to $263.1 million for the fourth quarter of 2017, an increase of $5.0 million, or by 1.90%. The change was attributable to the following drivers:

• Personnel expense, which includes salaries, wages and employee benefits, increased by $5.8 million primarily driven by payroll incentive plans, higher payroll taxes and 401(K) matching expense.

• Processing fees paid to third parties increased by $1.4 million largely due to core processing expenses related to the acquisition of Guaranty.

• Consultant services decreased by $2.7 million primarily due to regulatory, accounting and compliance-related services that were completed in the fourth quarter of 2017.

Noninterest expense was $268.1 million in the first quarter of 2018, compared to $236.7 million for the same period in 2017, an increase of $31.4 million, or by 13.25%. The change was attributable to the following drivers:

• Personnel expense increased by $17.8 million largely due to higher wages and benefits from the Guaranty acquisition, increased headcount, merit and incentive increases and an increase in benefit costs.

• Processing fees paid to third parties increased by $3.9 million primarily related to the Guaranty acquisition and growth in the bill pay service provided to customers.

• Occupancy expense increased by $3.2 million due to higher building maintenance and new expenses related to the Guaranty acquisition.

• Consultant services increased by $1.1 million due to regulatory, accounting and compliance-related projects initiated in 2018.

• Other expense increased by $5.4 million, primarily resulting from a $1.5 million reversal of a repurchase reserve on a Small Business Administration (SBA) guaranteed loan recorded in the first quarter of 2017, higher legal costs and operational loss increases.

Income Taxes

Income tax expense was $31.2 million, $68.7 million and $37.4 million for the first quarter of 2018, fourth quarter of 2017 and first quarter of 2017, representing effective tax rates of 23.8 percent, 55.8 percent and 35.6 percent during the respective periods. The income tax expense and effective tax rate increases during the fourth quarter of 2017 and subsequent decreases during the first quarter of 2018 were primarily due to the impact of the Tax Act. The reduction in the statutory federal tax rate to 21.0 percent on January 1, 2018 resulted in additional income tax expense of $25.8 million for the fourth quarter of 2017 primarily related to the re-measurement of deferred taxes.

We monitor and evaluate the potential impact of current events on the estimates used to establish income tax expenses and income tax liabilities. On a periodic basis, we evaluate our income tax positions based on current tax law, positions taken by various tax auditors within the jurisdictions where BancShares is required to file income tax returns, as well as potential or pending audits or assessments by tax auditors.

INTEREST-EARNING ASSETS

Interest-earning assets include loans and leases, investment securities, and overnight investments, all of which reflect varying interest rates based on the risk level and repricing characteristics of the underlying asset. Riskier investments typically carry a higher interest rate but expose us to higher levels of market risk.

We have historically focused on maintaining high-asset quality, which results in a loan and lease portfolio subjected to strenuous underwriting and monitoring procedures. We avoid high-risk industry concentrations, but we do maintain a concentration of owner-occupied real estate loans to borrowers in medical and medical-related fields. Our focus on asset quality also influences the composition of our investment securities portfolio.

Interest-earning assets averaged $32.32 billion and $32.87 billion for the quarters ended March 31, 2018 and December 31, 2017, respectively. The $553.8 million decrease from December 31, 2017 was composed of an $868.1 million decline in overnight investments primarily related to the use of funds for the extinguishment of eight FHLB debt obligations totaling $675.0 million, offset by a $305.9 million increase in loans and leases as a result of originated loan growth and an $8.4 million increase in investment securities.

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Investment Securities

The primary objective of the investment portfolio is to generate incremental income by deploying excess funds into securities that have minimal liquidity and credit risk and low to moderate interest rate risk. Other objectives include acting as a stable source of liquidity, serving as a tool for asset and liability management and maintaining an interest rate risk profile compatible with BancShares' objectives. Additionally, purchases of equities and corporate bonds in other financial institutions have been made largely under a long-term earnings optimization strategy. Changes in the total balance of our investment securities portfolio result from trends in balance sheet funding and market performance. Generally, when inflows arising from deposit and treasury services products exceed loan and lease demand, we invest excess funds into the securities portfolio or into overnight investments. Conversely, when loan demand exceeds growth in deposits and short-term borrowings, we allow any overnight investments to decline and use proceeds from maturing securities and prepayments to fund loan demand. See Note C in the Notes to Consolidated Financial Statements for additional disclosures regarding investment securities.

With the adoption of Accounting Standard Update (ASU) 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, in the first quarter of 2018, marketable equity investments are no long classified as investments available for sale and the fair value changes in those investments is reflected in earnings. We recorded a cumulative-effect adjustment to the balance sheet resulting in an $18.7 million increase to retained earnings and a decrease to AOCI on January 1, 2018. This applied to the equity securities held in our investment portfolio.

The fair value of total investment securities was $6.97 billion at March 31, 2018, a decrease of $212.3 million, when compared to $7.18 billion at December 31, 2017. The decrease in the portfolio from December 31, 2017 was primarily attributable to only reinvesting a portion of the proceeds from sales, maturities and pay downs into the investment portfolio and a rise in unrealized losses on the available for sale portfolio. Investment securities decreased $57.8 million from March 31, 2017 to March 31, 2018 primarily due to an increase in the unrealized losses on the available for sale portfolio.

As of March 31, 2018, investment securities available for sale had a net pre-tax unrealized loss of $157.5 million, compared to a net pre-tax unrealized loss of $48.8 million as of December 31, 2017 and a net pre-tax unrealized loss of $58.8 million as of March 31, 2017. Available for sale securities are reported at fair value and unrealized gains and losses are included as a component of other comprehensive income, net of deferred taxes. Per the adoption of ASU 2016-01, our equity securities were no longer considered available for sale at March 31, 2018 and any unrealized gain or loss on equity securities is recorded on the Consolidated Statements of Income. The fair value of equity securities was $110.1 million at March 31, 2018. After evaluating the securities with unrealized losses, management concluded that no other than temporary impairment existed as of March 31, 2018.

There were no sales of investment securities available for sale for the three months ended March 31, 2018 compared to a net loss of $371 thousand and $24 thousand on sales of securities for the three months ended December 31, 2017 and March 31, 2017, respectively. The net marketable equity securities gains was $971 thousand for the three months ended March 31, 2018 and is recorded on the Consolidated Statements of Income.

At March 31, 2018, mortgage-backed securities represented 74.7 percent of total investment securities, compared to U.S. Treasury, government agency securities, corporate bonds, other investments and marketable equity securities, which represented 22.3 percent, 0.5 percent, 0.9 percent, 0.1 percent and 1.5 percent of the total investment securities, respectively. Overnight investments are with the Federal Reserve Bank and other financial institutions.

Due primarily due to rising market rates in mortgage-backed securities products since December 31, 2017, the carrying value of mortgage-backed securities has decreased by $134.1 million. U.S. Treasury securities decreased $104.0 million primarily due to maturities with only a portion of the proceeds reinvested back into U.S. Treasury securities. Government agency securities increased $23.2 million due to new purchases during the first quarter of 2018. Equity securities, comprised of investments in other financial institutions, increased $4.9 million since December 31, 2017 primarily due to higher market prices at March 31, 2018.

On May 1, 2018, mortgage-backed securities with an amortized cost of $2.49 billion were transferred from investments available for sale to the held to maturity portfolio. At the time of transfer, the mortgage-backed securities had a fair value of $2.38 billion and a weighted average maturity of 13 years. FCB has the intent and ability to retain these securities until maturity.

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Table 6

Investment Securities

	March 31, 2018				December 31, 2017				March 31, 2017
(Dollars in thousands)	Cost		Fair value		Cost		Fair value		Cost		Fair Value
Investment securities available for sale:
U.S. Treasury	$	1,557,991	$	1,553,893	$	1,658,410	$	1,657,864	$	1,619,380	$	1,618,168
Government agency	32,006		31,909		8,695		8,670		40,185		40,221
Mortgage-backed securities	5,360,251		5,206,667		5,419,379		5,340,756		5,363,747		5,306,107
Equity securities	—		—		75,471		105,208		72,064		94,265
Corporate bonds	59,414		59,653		59,414		59,963		49,370		49,565
Other	5,538		5,618		7,645		7,719		11,702		11,535
Total investment securities available for sale	7,015,200		6,857,740		7,229,014		7,180,180		7,084,384		7,025,596
Investment in marketable equity securities	79,458		110,107		—		—		—		—
Investment securities held to maturity:
Mortgage-backed securities	74		79		76		81		83		89
Total investment securities	$	7,094,732	$	6,967,926	$	7,229,090	$	7,180,261	$	7,084,467	$	7,025,685

Loans and Leases

Loans and leases were $23.61 billion at March 31, 2018, a net increase of $15.1 million compared to December 31, 2017, representing growth of 0.2 percent on an annualized basis. Originated loans increased by $74.3 million, or by 1.32 percent on an annualized basis, primarily related to growth in the commercial mortgage portfolio. Originated loan growth was offset by a decline in purchased credit impaired (PCI) loans of $59.2 million primarily due to continued PCI loan portfolio run-off.

BancShares reports non-PCI and PCI loan portfolios separately and each portfolio is further divided into commercial and non-commercial. Additionally, loans are assigned to loan classes, which further disaggregate loans based upon common risk characteristics, such as commercial real estate, commercial and industrial or residential mortgage. Table 7 provides the composition of non-PCI and PCI loans and leases.

Non-PCI Loans and Leases

The non-PCI portfolio includes loans that management has the intent and ability to hold and is reported at the principal balance outstanding, net of deferred loan fees and costs. Non-PCI loans include originated commercial, originated noncommercial, purchased non-credit impaired loans and leases and certain purchased revolving credit. Purchased non-credit impaired loans included as non-PCI do not have evidence of credit deterioration at acquisition. Purchased non-impaired loans are initially recorded at their fair value at the date of acquisition.

Non-PCI loans and leases at March 31, 2018 were $22.91 billion, representing 97.0 percent of total loans and leases, compared to $22.83 billion and $21.06 billion at December 31, 2017 and March 31, 2017, respectively.

The non-PCI commercial loan portfolio is composed of Commercial Mortgage, Commercial and Industrial, Construction and Land Development, Lease Financing, Other Commercial Real Estate and Other Commercial loans. Non-PCI commercial loans were $14.87 billion at March 31, 2018, an increase of $72.5 million and $1.01 billion compared to December 31, 2017 and March 31, 2017, respectively, primarily resulting from originated loan growth.

The non-PCI noncommercial loan portfolio is composed of Residential Mortgage, Revolving Mortgage, Consumer and Construction and Land Development loans. Non-PCI noncommercial loans were $8.04 billion at March 31, 2018, an increase of $1.8 million and $840.3 million compared to December 31, 2017 and March 31, 2017, respectively, primarily resulting from originated loan growth. The increase from March 31, 2017 was also attributable to the impact of the Guaranty acquisition which contributed $413.9 million to the non-PCI noncommercial loan portfolio at March 31, 2018.

PCI Loans

The PCI portfolio includes loans acquired in a transfer, including business combinations, where there is evidence of credit deterioration since origination and it is probable at the date of acquisition that we will not collect all contractually required principal and interest payments. All nonrevolving loans are evaluated at acquisition and where a discount is required at least in part due to credit quality, the loans are accounted for under the guidance in ASC Topic 310-30. PCI loans are valued at fair value at the date of acquisition.

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PCI loans at March 31, 2018 were $703.8 million, representing 3.0 percent of total loans and leases, compared to $763.0 million and $848.8 million at December 31, 2017 and March 31, 2017, respectively.

PCI commercial loans were $355.9 million at March 31, 2018, a decrease of $37.5 million since December 31, 2017 and $173.9 million since March 31, 2017, reflecting continued loan run-off. At March 31, 2018, PCI noncommercial loans were $347.9 million, a decrease of $21.7 million since December 31, 2017 and an increase of $28.9 million since March 31, 2017. The decrease from December 31, 2017 was due to continued loan run-off. The increase from March 31, 2017 reflects net loans acquired from Guaranty, offset by continued loan run-off.

Table 7

Loans and Leases

(Dollars in thousands)	March 31, 2018		December 31, 2017		March 31, 2017
Non-PCI loans and leases:
Commercial:
Construction and land development	$	738,413	$	669,215	$	683,415
Commercial mortgage	9,859,136		9,729,022		9,173,612
Other commercial real estate	386,734		473,433		364,862
Commercial and industrial	2,695,205		2,730,407		2,477,911
Lease financing	910,589		894,801		840,201
Other	281,485		302,176		321,352
Total commercial loans	14,871,562		14,799,054		13,861,353
Noncommercial:
Residential mortgage	3,587,791		3,523,786		2,945,361
Revolving mortgage	2,651,648		2,701,525		2,604,156
Construction and land development	243,114		248,289		218,103
Consumer	1,554,025		1,561,173		1,428,660
Total noncommercial loans	8,036,578		8,034,773		7,196,280
Total non-PCI loans and leases	22,908,140		22,833,827		21,057,633
PCI loans:
Commercial:
Construction and land development	9,316		10,135		26,542
Commercial mortgage	325,073		358,103		455,551
Other commercial real estate	16,179		17,124		18,723
Commercial and industrial	3,732		6,374		27,794
Other	1,628		1,683		1,244
Total commercial loans	355,928		393,419		529,854
Noncommercial:
Residential mortgage	282,338		299,318		275,904
Revolving mortgage	60,388		63,908		40,345
Construction and land development	3,006		4,163		—
Consumer	2,177		2,190		2,713
Total noncommercial loans	347,909		369,579		318,962
Total PCI loans	703,837		762,998		848,816
Total loans and leases	$	23,611,977	$	23,596,825	$	21,906,449

Allowance for Loan and Lease Losses (ALLL)

The ALLL was $223.1 million at March 31, 2018, representing an increase of $1.2 million and $2.2 million since December 31, 2017 and March 31, 2017, respectively. The ALLL as a percentage of total loans and leases was 0.94 percent at March 31, 2018, compared to 0.94 percent and 1.01 percent at December 31, 2017 and March 31, 2017, respectively.

At March 31, 2018, the ALLL allocated to total non-PCI loans and leases was $210.8 million, or 0.92 percent of non-PCI loans and leases, compared to $211.9 million, or 0.93 percent, at December 31, 2017 and $210.0 million, or 1.00 percent, at March 31, 2017. The ALLL for total non-PCI loans and leases decreased from December 31, 2017 primarily due to improvements in qualitative factors across multiple products and credit quality improvements within the commercial construction and land development as well as commercial real estate non-healthcare portfolios. The ALLL for total non-PCI loans and leases increased from March 31, 2017 primarily due to organic loan growth.

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The ALLL allocated to originated non-PCI loans and leases was 0.98 percent of originated non-PCI loans and leases at March 31, 2018, compared to 1.00 percent and 1.09 percent at December 31, 2017 and March 31, 2017, respectively. Originated non-PCI loans were $21.36 billion, $21.13 billion and $19.24 billion at March 31, 2018, December 31, 2017 and March 31, 2017, respectively, and do not include purchased revolving, purchased non-PCI loans or PCI loans.

The remaining ALLL of $12.3 million relates to PCI loans at March 31, 2018, compared to $10.0 million and $10.9 million at December 31, 2017 and March 31, 2017, respectively. The ALLL on the PCI loan portfolio increased from December 31, 2017 and March 31, 2017 primarily due to updated cash flow estimates.

BancShares recorded a net provision expense of $7.6 million for loan and lease losses for the first quarter of 2018, compared to a net provision credit of $2.8 million for the fourth quarter of 2017. The $10.4 million increase in net provision expense was primarily due to higher PCI provision expense based on updated cash flow estimates and a decline in the magnitude of favorable experiences in certain loan loss factors that occurred during the fourth quarter of 2017, partially offset by lower loan growth in the current quarter. Net provision expense for the three months ended March 31, 2018 remained relatively flat compared to $8.2 million for the same period of 2017.

On an annualized basis, total net charge-offs as a percentage of total average loans and leases for the first quarter of 2018 was 0.11 percent, compared to 0.12 percent in the fourth quarter of 2017 and 0.11 percent in the first quarter of 2017. Net charge-offs for non-PCI loans and leases were $6.3 million during the first quarter of 2018, compared to $6.8 million and $6.1 million during the fourth quarter of 2017 and first quarter of 2017, respectively. On an annualized basis, non-PCI net charge-offs as a percentage of non-PCI average loans and leases during the first quarter of 2018 were 0.11 percent, compared to 0.12 percent in both the fourth quarter of 2017 and first quarter of 2017.

The unamortized discount related to non-PCI loans and leases at March 31, 2018, December 31, 2017 and March 31, 2017 was $32.1 million, $35.0 million and $28.4 million, respectively. The unamortized discount related to PCI loans at March 31, 2018, December 31, 2017 and March 31, 2017 was $104.9 million, $111.3 million and $120.9 million, respectively.

Management considers the ALLL adequate to absorb estimated inherent losses that relate to loans and leases outstanding at March 31, 2018, although future adjustments may be necessary based on changes in economic conditions and other factors. In addition, various regulatory agencies periodically review the ALLL as part of their exam process which could result in adjustments to the ALLL based on information available to them at the time of their examination.

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Table 8

Allowance for Loan and Lease Losses Components by Loan Class

	2018			2017
	First			Fourth			Third			Second			First
(Dollars in thousands)	Quarter			Quarter			Quarter			Quarter			Quarter
Allowance for loan and lease losses at beginning of period	$	221,893		$	231,842		$	228,798		$	220,943		$	218,795
Non-PCI provision (credit) for loan and lease losses
Total commercial	243			(8,615		)	2,233			3,984			7,530
Total noncommercial	5,008			8,443			6,250			5,768			3,546
Non-PCI provision (credit) for loan and lease losses	5,251			(172		)	8,483			9,752			11,076
PCI provision (credit) for loan losses	2,354			(2,637		)	(537		)	2,572			(2,845		)
Non-PCI Charge-offs:
Commercial:
Construction and land development	—			(100		)	(9		)	(413		)	(77		)
Commercial mortgage	(46		)	(110		)	(39		)	(235		)	(37		)
Other commercial real estate	—			—			—			—			(5		)
Commercial and industrial	(1,475		)	(3,277		)	(1,275		)	(3,121		)	(3,253		)
Lease financing	(854		)	(38		)	(687		)	(97		)	(173		)
Other	(3		)	(59		)	(666		)	(64		)	(123		)
Total commercial	(2,378		)	(3,584		)	(2,676		)	(3,930		)	(3,668		)
Noncommercial:
Residential mortgage	(806		)	(300		)	(604		)	(222		)	(250		)
Revolving mortgage	(992		)	(1,045		)	(218		)	(280		)	(825		)
Consumer	(5,255		)	(4,769		)	(4,996		)	(4,991		)	(3,966		)
Total noncommercial	(7,235		)	(6,114		)	(5,818		)	(5,493		)	(5,041		)
Total non-PCI charge-offs	(9,613		)	(9,698		)	(8,494		)	(9,423		)	(8,709		)
Non-PCI Recoveries:
Commercial:
Construction and land development	23			201			56			209			55
Commercial mortgage	239			301			1,446			731			364
Other commercial real estate	145			8			8			7			4
Commercial and industrial	1,219			650			433			2,392			265
Lease financing	41			240			3			—			6
Other	42			41			123			46			13
Total commercial	1,709			1,441			2,069			3,385			707
Noncommercial:
Residential mortgage	77			85			92			75			287
Revolving mortgage	194			101			228			401			552
Construction and land development	26			—			—			—			—
Consumer	1,309			1,227			1,203			1,093			1,080
Total noncommercial	1,606			1,413			1,523			1,569			1,919
Total non-PCI recoveries	3,315			2,854			3,592			4,954			2,626
Non-PCI loans and leases charged off, net	(6,298		)	(6,844		)	(4,902		)	(4,469		)	(6,083		)
PCI loans charged off, net	(84		)	(296		)	—			—			—
Allowance for loan and lease losses at end of period	$	223,116		$	221,893		$	231,842		$	228,798		$	220,943
Reserve for unfunded commitments	$	1,116		$	1,032		$	1,309		$	1,133		$	1,198

First Quarter 2018 to Fourth Quarter 2017

Provision expense for non-PCI commercial loans was $243 thousand in the first quarter of 2018, compared to provision credit of $8.6 million for the fourth quarter of 2017. This increase of $8.9 million was primarily due to organic loan growth in the construction and land development as well as commercial mortgage loan portfolios and a decline in the magnitude of favorable experiences in certain loan loss factors that occurred during the fourth quarter of 2017.

Provision expense for non-PCI noncommercial loans was $5.0 million in the first quarter of 2018, compared to $8.4 million for the fourth quarter of 2017. This decrease of $3.4 million was primarily due to declines in provision for construction and land development as well as consumer portfolios resulting from updated loan loss factors given a decrease in loss experience. Declines in loan balances also contributed to the provision decrease.

First Quarter 2018 to First Quarter 2017

Provision expense in the first quarter of 2018 for non-PCI commercial loans was $243 thousand, down $7.3 million from $7.5 million in the first quarter of 2017 resulting from declines in the commercial mortgage, other commercial real estate, as well as commercial and industrial portfolios due to updated loan loss factors given a decrease in loss experience, offset by loan growth.

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Provision expense in the first quarter of 2018 for non-PCI noncommercial loans was $5.0 million, an increase of $1.5 million from $3.5 million in the first quarter of 2017 primarily due to organic loan growth in the consumer portfolio as well as an increase in the loss rate as a result of updating loan loss factors in the fourth quarter of 2017.

Table 9

Allowance for Loan and Lease Losses Metrics and Ratios

	2018			2017
	First			Fourth			Third			Second			First
(Dollars in thousands)	Quarter			Quarter			Quarter			Quarter			Quarter
Average loans and leases:
PCI	$	733,830		$	799,399		$	865,580		$	858,053		$	857,501
Non-PCI	22,932,268			22,560,836			22,131,615			21,717,270			21,093,943
Loans and leases at period-end:
PCI	703,837			762,998			834,167			894,863			848,816
Non-PCI	22,908,140			22,833,827			22,314,906			21,976,602			21,057,633
Allowance for loan and lease losses allocated to loans and leases:
PCI	12,296			10,026			12,959			13,496			10,924
Non-PCI	210,820			211,867			218,883			215,302			210,019
Total	$	223,116		$	221,893		$	231,842		$	228,798		$	220,943
Net charge-offs (annualized) to average loans and leases:
PCI	0.05		%	0.15		%	—		%	—		%	—		%
Non-PCI	0.11			0.12			0.09			0.08			0.12
Total	0.11			0.12			0.08			0.08			0.11
ALLL to total loans and leases:
PCI	1.75			1.31			1.55			1.51			1.29
Non-PCI	0.92			0.93			0.98			0.98			1.00
Total	0.94			0.94			1.00			1.00			1.01

Nonperforming Assets

Nonperforming assets include nonaccrual loans and leases and OREO resulting from both non-PCI and PCI loans. At March 31, 2018, BancShares’ nonperforming assets were $138.9 million, down from $144.3 million and $144.0 million at December 31, 2017 at March 31, 2017, respectively.

At March 31, 2018, OREO totaled $48.1 million, representing declines of $3.0 million and $8.4 million since December 31, 2017 and March 31, 2017, respectively, as sales and write-downs outpaced additions. Nonaccrual non-PCI loans and leases at March 31, 2018 decreased $3.2 million to $89.3 million compared to $92.5 million at December 31, 2017 primarily due to commercial and residential mortgage loans returning to accrual status. Nonaccrual non-PCI loans and leases increased $3.2 million from $86.1 million at March 31, 2017 as a result of an increase in revolving mortgage loans moving to nonaccrual status, offset by problem asset resolutions in the commercial mortgage loans portfolio. Nonaccrual PCI loans at March 31, 2018 were up $1.0 million and $122 thousand from December 31, 2017 and March 31, 2017, respectively.

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Table 10

Nonperforming Assets

	2018			2017
	First			Fourth			Third			Second			First
(Dollars in thousands)	Quarter			Quarter			Quarter			Quarter			Quarter
Nonaccrual loans and leases:
Non-PCI	$	89,260		$	92,534		$	90,064		$	88,067		$	86,086
PCI	1,580			624			1,017			1,312			1,458
Other real estate	48,089			51,097			53,988			60,781			56,491
Total nonperforming assets	$	138,929		$	144,255		$	145,069		$	150,160		$	144,035
Loans and leases:
Non-PCI	$	22,908,140		$	22,833,827		$	22,314,906		$	21,976,602		$	21,057,633
PCI	703,837			762,998			834,167			894,863			848,816
Total loans and leases	$	23,611,977		$	23,596,825		$	23,149,073		$	22,871,465		$	21,906,449
Accruing loans and leases 90 days or more past due
Non-PCI	$	3,030		$	2,978		$	3,449		$	4,192		$	2,982
PCI	48,229			58,740			64,801			72,586			75,576
Ratio of total nonperforming assets to total loans, leases and other real estate owned	0.59		%	0.61		%	0.63		%	0.65		%	0.66		%

Troubled Debt Restructurings (TDRs)

We have selectively agreed to modify existing loan terms to provide relief to customers who are experiencing financial difficulties or other circumstances that could affect their ability to meet debt obligations. Typical modifications include short-term deferral of interest or modification of payment terms. Nonperforming TDRs that are not accruing interest are included as nonperforming assets within nonaccrual loans and leases. TDRs that are accruing at the time of restructure and continue to perform based on the restructured terms are considered performing.

Table 11

Troubled Debt Restructurings

(Dollars in thousands)	March 31, 2018		December 31, 2017		March 31, 2017
Accruing TDRs:
PCI	$	18,380	$	18,163	$	20,296
Non-PCI	113,540		112,228		102,460
Total accruing TDRs	131,920		130,391		122,756
Nonaccruing TDRs:
PCI	250		272		298
Non-PCI	31,300		33,898		25,989
Total nonaccruing TDRs	31,550		34,170		26,287
All TDRs:
PCI	18,630		18,435		20,594
Non-PCI	144,840		146,126		128,449
Total TDRs	$	163,470	$	164,561	$	149,043

INTEREST-BEARING LIABILITIES

Interest-bearing liabilities include interest-bearing deposits, short-term borrowings and long-term obligations. Interest-bearing liabilities were $18.72 billion and $19.59 billion at March 31, 2018 and December 31, 2017, respectively. The $875.2 million decline from December 31, 2017 was due to decreases in long-term obligations, shot-term borrowings and interest-bearing deposits of $675.8 million, $139.0 million and $60.4 million, respectively. Interest-bearing liabilities decreased $1.01 billion to $18.72 billion at March 31, 2018 from $19.73 billion at March 31, 2017 due to a $533.1 million decrease in long-term obligations, a $240.8 million decrease in short-term borrowings and a decrease of $236.7 million in interest-bearing deposits.

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Deposits

At March 31, 2018, total deposits were $29.97 billion, an increase of $703.0 million, or 2.4 percent, compared to December 31, 2017 and an increase of $966.5 million, or 3.3 percent, when compared to March 31, 2017. The increase from both periods was primarily the result of organic growth in demand deposit and interest-bearing savings and checking account balances, offset by run-off in time deposits and lower money market account balances.

Due to our focus on maintaining a strong liquidity position, core deposit retention remains a key business objective. We believe that traditional bank deposit products remain an attractive option for many customers but, as economic conditions improve, we recognize that our liquidity position could be adversely affected as bank deposits are withdrawn and invested elsewhere. Our ability to fund future loan growth is significantly dependent on our success at retaining existing deposits and generating new deposits at a reasonable cost.

Short-Term Borrowings

At March 31, 2018, short-term borrowings were $554.8 million compared to $693.8 million and $795.6 million at December 31, 2017 and March 31, 2017, respectively. The $139.0 million decrease from December 31, 2017 was due to FHLB borrowing maturities of $75.0 million, the maturity of a $30.0 million repurchase agreement and lower customer repurchase agreement balances. The $240.8 million decrease from March 31, 2017 was due to FHLB borrowing maturities of $85.1 million, the maturity of a $30.0 million repurchase agreement and lower customer repurchase agreement balances, offset by reclassifications of $15.0 million in FHLB borrowings and subordinated notes payable of $15.0 million from long-term obligations.

Long-Term Obligations

Long-term obligations were $194.4 million at March 31, 2018, down $675.8 million from December 31, 2017 primarily due to prepayments on FHLB borrowings totaling $675.0 million and a redemption of $2.0 million aggregate principal amount of Trust Preferred Securities issued by FCB/NC Capital Trust III, partially offset by the addition of a capital lease for $1.5 million. Long-term obligations decreased $533.1 million from March 31, 2017 primarily due to prepayments on FHLB borrowings totaling $675.0 million, reclassifications of $15.0 million in FHLB borrowings and subordinated notes payable of $15.0 million from long-term obligations to short-term borrowings, as well as redemptions of $5.0 million and $2.0 million aggregate principal amount of Trust Preferred Securities issued by FCB/SC Capital Trust II and FCB/NC Capital Trust III, respectively. These decreases were partially offset by new FHLB borrowings of $175.0 million coupled with the addition of a capital lease for $1.5 million.

BancShares owns three special purpose entities – FCB/NC Capital Trust III, FCB/SC Capital Trust II and SCB Capital Trust I (the Trusts). Long-term obligations included junior subordinated debentures representing obligations to the Trusts, which may be redeemed at par in whole or in part at any time. BancShares has guaranteed all obligations of the Trusts. BancShares had the following issues of trust preferred securities and subordinated debentures owed to the Trusts:

Table 12

Trust Preferred Securities and Subordinated Debentures

	March 31, 2018				December 31, 2017				March 31, 2017
(Dollars in thousands)	Subordinated Debentures Owed to Trust		Trust Preferred Securities of the Trusts		Subordinated Debentures Owed to Trust		Trust Preferred Securities of the Trusts		Subordinated Debentures Owed to Trust		Trust Preferred Securities of the Trusts		Maturity Date
FCB/NC Capital Trust III	$	88,145	$	85,500	$	90,207	$	87,500	$	90,206	$	87,500	June 30, 2036
FCB/SC Capital Trust II	19,588		19,000		19,588		19,000		24,743		24,000		June 15, 2034
SCB Capital Trust I	10,310		10,000		10,310		10,000		10,310		10,000		April 7, 2034
	$	118,043	$	114,500	$	120,105	$	116,500	$	125,259	$	121,500

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Shareholders' Equity and Capital Adequacy

BancShares and FCB are required to meet minimum capital requirements set forth by regulatory authorities. Failure to meet minimum capital requirements may result in certain actions by regulators that could have a direct material effect on the consolidated financial statements.

In accordance with accounting principles generally accepted in the United States of America (GAAP), the unrealized gains and losses on certain assets and liabilities, net of deferred taxes, are included in accumulated other comprehensive income (AOCI) within shareholders' equity. These amounts are excluded from shareholders' equity in the calculation of our capital ratios under current regulatory guidelines. Shareholders' equity for the first quarter of 2018 was also impacted by cumulative effect adjustments of $50.0 million related to the adoption of ASU 2016-01 for the accounting of equity investments and ASU 2018-02 for the accounting of stranded tax effects in AOCI resulting from the 2017 Tax Act. In the aggregate, the unrealized gains and losses and cumulative effect adjustments represented a net reduction in shareholders' equity of $230.3 million at March 31, 2018, compared to a net reduction of $122.3 million at December 31, 2017 and $110.9 million at March 31, 2017. The $108.0 million decrease in AOCI from December 31, 2017 was primarily driven by an increase in unrealized losses on investment securities as a result of lower market interest rates as well as the cumulative effect adjustments recorded in the current quarter. The $119.4 million decrease in AOCI from March 31, 2017 was primarily driven by the change in the discount rate used in our defined benefit pension plans, the unrealized loss position on our investment securities available for sale portfolio at March 31, 2018 as a result of higher market interest rates and the cumulative effect adjustments recorded in the current quarter.

Table 13

Analysis of Capital Adequacy

	March 31, 2018		December 31, 2017		March 31, 2017		Regulatory minimum		Well-capitalized requirement
BancShares
Risk-based capital ratios
Tier 1 risk-based capital	13.38	%	12.88	%	12.57	%	6.00	%	8.00	%
Common equity Tier 1	13.38		12.88		12.57		4.50		6.50
Total risk-based capital	14.70		14.21		13.99		8.00		10.00
Tier 1 leverage ratio	10.02		9.47		9.15		4.00		5.00
Bank
Risk-based capital ratios
Tier 1 risk-based capital	13.00	%	12.54	%	12.41	%	6.00	%	8.00	%
Common equity Tier 1	13.00		12.54		12.41		4.50		6.50
Total risk-based capital	13.92		13.46		13.37		8.00		10.00
Tier 1 leverage ratio	9.74		9.22		9.04		4.00		5.00

Bank regulatory agencies approved regulatory capital guidelines (Basel III) aimed at strengthening existing capital requirements for banking organizations. The final rules set minimum requirements for both the quantity and quality of capital held by BancShares and FCB and included a common equity Tier 1 capital to risk-weighted assets ratio. A capital conservation buffer was also established and was phased in beginning January 1, 2016 at 0.625 percent above minimum risk-based capital requirements and will increase each subsequent year by an additional 0.625 percent until reaching its final level of 2.50 percent on January 1, 2019. As such, the capital conservation buffer requirement was 1.88% percent effective January 1, 2018. BancShares and FCB had capital conservation buffers above minimum risk-based capital requirements of 6.70 percent and 5.92 percent, respectively, at March 31, 2018. The buffers exceeded the 1.88% percent requirement and, therefore, resulted in no limit on distributions.

As of March 31, 2018, BancShares and FCB continued to exceed minimum capital standards and remained well-capitalized under Basel III guidelines. BancShares had no trust preferred capital securities included in Tier 1 capital at March 31, 2018 and December 31, 2017 under Basel III guidelines. Trust preferred capital securities continue to be a component of total risk-based capital.

RISK MANAGEMENT

Risk is inherent in any business. Senior management has primary responsibility for day-to-day management of the risks we face with accountability of and support from all company associates.  The Board of Directors strives to ensure that risk management is part of the business culture and that policies and procedures for identifying, assessing, measuring, monitoring, and managing risk are part of the decision-making process. The Board of Director’s role in risk oversight is an integral part of our overall Enterprise

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Risk Management Framework.  The Board of Directors administers its risk oversight function primarily through the Board Risk Committee.

The Board Risk Committee structure is designed to allow for information flow and timely escalation of risk related issues. The Board Risk Committee is directed to monitor and advise the Board of Directors regarding risk exposures, including credit, market, capital, liquidity, operational, compliance, strategic, legal, and reputational risks; review, approve and monitor adherence to the risk appetite and supporting risk tolerance levels; and evaluate, monitor and oversee the adequacy and effectiveness of the Enterprise Risk Management Framework. The Board Risk Committee also reviews reports of examination by and communications from regulatory agencies; the results of internal and third party testing and assessments related to risk management; and any other matters within the scope of the Committee’s oversight responsibilities. The Board Risk Committee monitors management's response to certain risk related regulatory or audit issues. In addition, the Board Risk Committee may coordinate with the Audit Committee for the review of financial statements and related risks, information security and other areas of joint responsibility.

In combination with other risk management and monitoring practices, the results of enterprise wide stress testing activities are considered a key part of our risk management program. One key component of enterprise wide stress testing includes stress tests as mandated in the Dodd-Frank Act. The Dodd-Frank Act requires that stress tests be developed and performed to ensure that financial institutions have sufficient capital to absorb losses and support operations during multiple economic and bank scenarios. Bank holding companies with total consolidated assets between $10 billion and $50 billion, including BancShares, will undergo annual company-run stress tests. As directed by the Federal Reserve, summaries of BancShares’ results in the severely adverse stress tests are available to the public.

Credit risk management. Credit risk is the risk of not collecting payments pursuant to the contractual terms of loans, leases and certain investment securities. Loans and leases, other than acquired loans, are underwritten in accordance with our credit policies and procedures and are subject to periodic ongoing reviews. Acquired loans, regardless of whether PCI or non-PCI, are recorded at fair value as of the acquisition date and are subject to periodic reviews to identify any further credit deterioration. Our independent credit review function conducts risk reviews and analyses of both acquired and originated loans to ensure compliance with credit policies and to monitor asset quality trends and borrower financial strength. The risk reviews include portfolio analysis by geographic location, industry, collateral type and product. We strive to identify potential problem loans as early as possible, to record charge-offs or write-downs as appropriate and to maintain an adequate ALLL that accounts for losses that are inherent in the loan and lease portfolio.

Interest rate risk management. Interest rate risk (IRR) results principally from assets and liabilities maturing or repricing at different points in time, from assets and liabilities repricing at the same point in time but in different amounts, and from short-term and long-term interest rates changing in different magnitudes.

We assess our short-term IRR by forecasting net interest income over 24 months under various interest rate scenarios and comparing those results to forecast net interest income assuming stable rates. Rate shock scenarios represent an instantaneous and parallel shift in rates, up or down, from a base yield curve. Despite the current increase in market interest rates, the overall rate on interest-bearing deposits remains relatively low and as such, it is unlikely that the rates on most interest-bearing deposits can decline materially from current levels. Our shock projections incorporate assumptions of likely customer migration from low rate deposit instruments to intermediate term fixed rate instruments, such as certificates of deposit, as rates rise. Various other IRR scenarios are modeled to supplement shock scenarios. This may include interest rate ramps, changes in the shape of the yield curve and changes in the relationships of FCB rates to market rates.

Table 14

Net Interest Income Sensitivity Simulation Analysis

This table provides the impact on net interest income over 24 months resulting from various instantaneous interest rate shock scenarios as of March 31, 2018 and December 31, 2017.

	Estimated percentage increase (decrease) in net interest income
Change in interest rate (basis points)	March 31, 2018		December 31, 2017
-100	(11.04	)%	(12.25	)%
+100	3.76		3.66
+200	4.89		4.61
+300	2.92		2.43

Net interest income sensitivity metrics at March 31, 2018 compared to December 31, 2017 for all scenarios remained relatively stable with the slight increases primarily driven by an increase in overnight investments and a favorable change in the deposit mix from growth in non-interest bearing deposits.

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Table 15

Economic Value of Equity Modeling Analysis

Long-term interest rate risk exposure is measured using the economic value of equity (EVE) sensitivity analysis to study the impact of long-term cash flows on earnings and capital. EVE represents the difference between the sum of the present value of all asset cash flows and the sum of the present value of the liability cash flows. EVE sensitivity analysis involves discounting cash flows of balance sheet items under different interest rate scenarios. Cash flows will vary by interest rate scenario, resulting in variations in EVE. The base-case measurement and its sensitivity to shifts in the yield curve allow management to measure longer-term repricing and option risk in the balance sheet. This table presents the EVE profile as of March 31, 2018 and December 31, 2017.

	Estimated percentage increase (decrease) in EVE
Change in interest rate (basis points)	March 31, 2018		December 31, 2017
-100	(13.25	)%	(15.44	)%
+100	2.57		3.38
+200	(0.33	)	1.06
+300	(7.56	)	(5.52	)

The economic value of equity metrics at March 31, 2018 compared to December 31, 2017 declined in the +100 bps, +200 bps and +300 bps scenarios primarily due to prepayment of eight FHLB debt obligations totaling $675.0 million in the first quarter of 2018. While the extinguishment of debt did have a negative impact on the EVE in rising shock scenarios, it did remove the impact of the associated interest expense on the FHLB debt obligations.

We do not typically utilize interest rate swaps, floors, collars or other derivative financial instruments to attempt to hedge our overall balance sheet rate sensitivity and interest rate risk.

Liquidity risk management. Liquidity risk is the risk that an institution is unable to generate or obtain sufficient cash or its equivalents on a cost-effective basis to meet commitments as they fall due. The most common sources of liquidity risk arise from mismatches in the timing and value of on-balance sheet and off-balance sheet cash inflows and outflows. In general, on-balance sheet mismatches generate liquidity risk when the effective maturity of assets exceeds the effective maturity of liabilities. A commonly cited example of a balance sheet liquidity mismatch is when long-term loans (assets) are funded with short-term deposits (liabilities). Other forms of liquidity risk include market constraints on the ability to convert assets into cash at expected levels, an inability to access funding sources at sufficient levels at a reasonable cost, and changes in economic conditions or exposure to credit, market, operational, legal and reputation risks that can affect an institution’s liquidity risk profile.

We utilize various limit-based measures to monitor, measure and control liquidity risk across three different types of liquidity:

• Tactical liquidity measures the risk of a negative cash flow position whereby cash outflows exceed cash inflows over a short-term horizon out to nine weeks;

• Structural liquidity measures the amount by which illiquid assets are supported by long-term funding; and

• Contingent liquidity utilizes cash flow stress testing across three crisis scenarios to determine the adequacy of our liquidity.

We aim to maintain a diverse mix of liquidity sources to support the liquidity management function, while aiming to avoid funding concentrations by diversifying our external funding with respect to maturities, counterparties and nature. Our primary source of liquidity is our retail deposit book due to the generally stable balances and low cost it offers. Additional sources include cash in excess of our reserve requirement at the Federal Reserve Bank, and various other corresponding bank accounts and unencumbered securities, which totaled $4.63 billion at March 31, 2018 compared to $3.70 billion at December 31, 2017. Another source of available funds is advances from the FHLB of Atlanta. Outstanding FHLB advances were $85.2 million as of March 31, 2018, and we had sufficient collateral pledged to secure $6.17 billion of additional borrowings. Also, at March 31, 2018, $2.86 billion in noncovered loans with a lendable collateral value of $2.16 billion were used to create additional borrowing capacity at the Federal Reserve Bank. We also maintain Federal Funds lines and other borrowing facilities which had $665.0 million of available capacity at March 31, 2018.

CRITICAL ACCOUNTING POLICIES

There have been no significant changes in our Critical Accounting Policies as described in our 2017 Annual Report on Form 10-K.

FORWARD-LOOKING STATEMENTS

Statements in this Report and exhibits relating to plans, strategies, economic performance and trends, projections of results of specific activities or investments, expectations or beliefs about future events or results and other statements that are not descriptions

57

of historical facts may be forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934.

Forward-looking information is inherently subject to risks and uncertainties, and actual results could differ materially from those currently anticipated due to a number of factors which include, but are not limited to, factors discussed in our Annual Report on Form 10-K and in other documents filed by us from time to time with the Securities and Exchange Commission.

Forward-looking statements may be identified by terms such as “may,” “will,” “should,” “could,” “expects,” “plans,” “intends,” “anticipates,” “believes,” “estimates,” “predicts,” “forecasts,” “projects,” “potential” or “continue,” or similar terms or the negative of these terms, or other statements concerning opinions or judgments of BancShares’ management about future events.

Factors that could influence the accuracy of those forward-looking statements include, but are not limited to, the financial success or changing strategies of our customers, customer acceptance of our services, products and fee structure, the competitive nature of the financial services industry, our ability to compete effectively against other financial institutions in our banking markets, actions of government regulators, the level of market interest rates and our ability to manage our interest rate risk, changes in general economic conditions that affect our loan and lease portfolio, the abilities of our borrowers to repay their loans and leases, the values of real estate and other collateral, the impact of the FDIC-assisted transactions, the risks discussed in Part II, Item 1A. Risk Factors and other developments or changes in our business that we do not expect.

Actual results may differ materially from those expressed in or implied by any forward-looking statements. Except to the extent required by applicable law or regulation, BancShares undertakes no obligation to revise or update publicly any forward-looking statements for any reason.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Market risk is the potential economic loss resulting from changes in market prices and interest rates. This risk can either result in diminished current fair values of financial instruments or reduced net interest income in future periods. As of March 31, 2018, BancShares’ market risk profile has not changed significantly from December 31, 2017, as discussed in the Form 10-K. Changes in fair value that result from movement in market rates cannot be predicted with any degree of certainty. Therefore, the impact that future changes in market rates will have on the fair values of financial instruments is uncertain.

Item 4.    Controls and Procedures

BancShares' management, with the participation of its Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the design and operation of BancShares' disclosure controls and procedures as of the end of the period covered by this Quarterly Report, in accordance with Rule 13a-15 of the Securities Exchange Act of 1934 (Exchange Act). Based upon that evaluation, as of the end of the period covered by this report, the Chief Executive Officer and the Chief Financial Officer concluded that BancShares' disclosure controls and procedures were effective to provide reasonable assurance that it is able to record, process, summarize and report in a timely manner the information required to be disclosed in the reports it files under the Exchange Act.

No changes in BancShares' internal control over financial reporting occurred during the first quarter of 2018 that have materially affected, or are reasonably likely to materially affect, BancShares' internal control over financial reporting.

PART II

Item 1. Legal Proceedings

BancShares and various subsidiaries have been named as defendants in various legal actions arising from our normal business activities in which damages in various amounts are claimed. Although the amount of any ultimate liability with respect to those matters cannot be determined, in the opinion of management, no legal actions currently exist that are expected to have a material effect on BancShares’ consolidated financial statements. Additional information relating to legal proceedings is set forth in Note L of BancShares' Notes to Unaudited Consolidated Financial Statements.

Item 1A. Risk Factors

There have been no material changes from the risk factors previously disclosed in our Form 10-K for the year ended December 31, 2017.

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

None

Item 6. Exhibits

31.1	Certification of Chief Executive Officer (filed herewith)
31.2	Certification of Chief Financial Officer (filed herewith)
32.1	Certification of Chief Executive Officer (filed herewith)
32.2	Certification of Chief Financial Officer (filed herewith)
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

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SIGNATURES

Pursuant to 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.

Date:	May 3, 2018		FIRST CITIZENS BANCSHARES, INC.
			(Registrant)
		By:	/s/ CRAIG L. NIX
			Craig L. Nix
			Chief Financial Officer

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, Frank B. Holding, Jr., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of First Citizens BancShares, Inc.;

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.

5. The registrant’s other certifying officer(s) 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: May 3, 2018

/s/ Frank B. Holding, Jr.

Frank B. Holding, Jr.

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Craig L. Nix, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of First Citizens BancShares, Inc.;

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.

5. The registrant’s other certifying officer(s) 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: May 3, 2018

/s/ Craig L. Nix

Craig L. Nix

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION

The undersigned hereby certifies that (i) the Form 10-Q filed by First Citizens BancShares, Inc. (the “Issuer”) for the period ended March 31, 2018, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and (ii) the information contained in that report fairly presents, in all material respects, the financial condition and results of operations of the Issuer on the dates and for the periods presented therein.

May 3, 2018

/s/ Frank B. Holding, Jr.

Frank B. Holding, Jr.

Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION

The undersigned hereby certifies that (i) the Form 10-Q filed by First Citizens BancShares, Inc. (the “Issuer”) for the period ended March 31, 2018, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and (ii) the information contained in that report fairly presents, in all material respects, the financial condition and results of operations of the Issuer on the dates and for the periods presented therein.

May 3, 2018

/s/ Craig L. Nix

Craig L. Nix

Chief Financial Officer

XML

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 03, 2018
Entity Registrant Name	FIRST CITIZENS BANCSHARES INC /DE/
Entity Central Index Key	0000798941
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A Common Stock
Entity Common Stock, Shares Outstanding		11,005,220
Class B Common Stock
Entity Common Stock, Shares Outstanding		1,005,185

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 248,139	$ 336,150
Overnight investments	1,946,882	1,387,927
Marketable equity securities	110,107	0
Investment securities available for sale	6,857,740	7,180,180
Investment securities held to maturity	74	76
Loans held for sale	46,660	51,179
Loans and Leases	23,611,977	23,596,825
Less allowance for loan and lease losses	(223,116)	(221,893)
Net loans and leases	23,388,861	23,374,932
Premises and equipment	1,140,820	1,138,431
Other real estate	48,089	51,097
Income earned not collected	96,607	95,249
FDIC shared-loss receivable	3,636	2,223
Goodwill	150,601	150,601
Other intangible assets	68,668	73,096
Other assets	329,553	686,371
Total assets	34,436,437	34,527,512
Liabilities
Noninterest-bearing deposits	12,000,741	11,237,375
Interest-bearing deposits	17,968,504	18,028,900
Total deposits	29,969,245	29,266,275
Short-term borrowings	554,758	693,807
Long-term obligations	194,413	870,240
FDIC shared-loss payable	102,466	101,342
Other liabilities	243,441	261,784
Total liabilities	31,064,323	31,193,448
Shareholders' Equity
Surplus	658,918	658,918
Retained earnings	2,931,509	2,785,430
Accumulated other comprehensive loss	(230,323)	(122,294)
Total shareholders' equity	3,372,114	3,334,064
Total liabilities and shareholders' equity	34,436,437	34,527,512
Class A Common Stock
Shareholders' Equity
Common stock	11,005	11,005
Class B Common Stock
Shareholders' Equity
Common stock	$ 1,005	$ 1,005

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shared authorized	16,000,000	16,000,000
Common stock, shares issued	11,005,220	11,005,220
Common stock, shares outstanding	11,005,220	11,005,220
Class B Common Stock
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shared authorized	2,000,000	2,000,000
Common stock, shares issued	1,005,185	1,005,185
Common stock, shares outstanding	1,005,185	1,005,185
Loans Held For Sale
Fair value of originated loans held for sale	$ 46,660	$ 51,179

XML

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income
Loans and leases	$ 251,982	$ 226,630
Investment securities:
Total investment securities interest and dividend income	35,020	29,751
Overnight investments	5,599	4,476
Total interest income	292,601	260,857
Interest expense
Deposits	3,756	4,436
Short-term borrowings	1,434	580
Long-term obligations	2,974	5,498
Total interest expense	8,164	10,514
Net interest income	284,437	250,343
Provision (credit) for loan and lease losses	7,605	8,231
Net interest income after provision for loan and lease losses	276,832	242,112
Noninterest income
Gain on acquisitions	0	12,017
Cardholder services	14,782	11,907
Merchant services	6,177	6,693
Service charges on deposit accounts	26,543	22,142
Wealth management services	23,569	20,962
Securities gains (losses), net	0	(24)
Marketable equity securities gain (loss), net	971	0
Other service charges and fees	7,480	7,601
Mortgage income	4,237	7,576
Insurance commissions	3,776	3,558
ATM income	2,171	1,773
Adjustments for FDIC shared-loss receivable	(1,478)	(1,628)
Net Impact from FDIC shared-loss termination	0	(45)
Gain (Loss) on Extinguishment of Debt	25,814	0
Other	8,642	7,115
Total noninterest income	122,684	99,647
Noninterest expense
Salaries and wages	129,203	116,362
Employee benefits	32,091	27,178
Occupancy expense	27,954	24,762
Equipment expense	24,974	24,588
Merchant processing		18,300
Cardholder processing		6,800
FDIC insurance expense	5,733	5,593
Foreclosure-related expenses	4,146	3,763
Merger-related expenses	598	833
Other	43,364	33,621
Total noninterest expense	268,063	236,700
Income before income taxes	131,453	105,059
Income taxes	31,222	37,438
Net income	$ 100,231	$ 67,621
Average shares outstanding (in shares)	12,010,405	12,010,405
Net income per share	$ 8.35	$ 5.63

XML

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 100,231	$ 67,621
Unrealized gains and losses on securities:
Change in unrealized securities gains (losses) arising during period	(78,634)	36,096
Tax effect	18,088	(13,419)
Reclassification adjustment for net gains realized and included in income before income taxes	0	24
Tax effect	0	(9)
Total change in unrealized gains and losses on securities, net of tax	(60,546)	22,692
Change in fair value of cash flow hedges:
Change in unrecognized loss on cash flow hedges	0	0
Tax effect	0	0
Total change in unrecognized loss on cash flow hedges, net of tax	0	0
Change in pension obligation:
Amortization of actuarial losses and prior service cost	3,337	2,500
Tax effect	(768)	(941)
Total change in pension obligation, net of tax	2,569	1,559
Net current period other comprehensive income	(57,977)	24,251
Total comprehensive income	$ 42,254	$ 91,872

XML

Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Surplus	Retained Earnings	Accumulated Other Comprehensive Loss	Financial Instruments ASU cumulative effect adjustment	Financial Instruments ASU cumulative effect adjustment Retained Earnings	Financial Instruments ASU cumulative effect adjustment Accumulated Other Comprehensive Loss	Income tax ASU cumulative effect adjustment	Income tax ASU cumulative effect adjustment Retained Earnings	Income tax ASU cumulative effect adjustment Accumulated Other Comprehensive Loss
Shareholders' equity	$ 3,012,427	$ 11,005	$ 1,005	$ 658,918	$ 2,476,691	$ (135,192)
Net income	67,621	0	0	0	67,621	0
Other comprehensive income, net of tax	24,251	0	0	0	0	24,251
Cash dividends	(3,603)	0	0	0	(3,603)	0
Shareholders' equity	3,100,696	11,005	1,005	658,918	2,540,709	(110,941)
Shareholders' equity	3,334,064	11,005	1,005	658,918	2,785,430	(122,294)
Net income	100,231	0	0	0	100,231	0
Other comprehensive income, net of tax	(57,977)	0	0	0	0	(57,977)
Cash dividends	(4,204)	0	0	0	(4,204)	0
Cumulative Effect of New Accounting Principle in Period of Adoption							$ 18,700	$ 18,700	$ (18,700)	$ 31,300	$ 31,300	$ (31,300)
Shareholders' equity	$ 3,372,114	$ 11,005	$ 1,005	$ 658,918	$ 2,931,509	$ (230,323)

XML

Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 0.35	$ 0.30

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Net income	$ 100,231	$ 67,621
Adjustments to reconcile net income to cash provided by operating activities:
Provision (credit) for loan and lease losses	7,605	8,231
Deferred tax expense (benefit)	(5,573)	6,693
Net change in current taxes	33,128	27,462
Depreciation	23,179	22,616
Net increase (decrease) in accrued interest payable	(2,454)	150
Net (increase) decrease in income earned not collected	(1,358)	(617)
Gain on acquisitions	0	(12,017)
Securities (gains) losses, net	0	24
Marketable equity securities gain (loss), net	(971)	0
Gain on extinguishment of debt	(25,814)	0
Loss on termination of FDIC shared-loss agreements	0	45
Origination of loans held for sale	(131,353)	(134,932)
Proceeds from sale of loans held for sale	138,538	162,837
Gain on sale of loans held for sale	(2,666)	(3,456)
(Gain) loss on sale of portfolio loans	0	(164)
Net writedowns/losses on other real estate	1,210	1,717
(Gain) loss on sales of premises and equipment	0	(156)
Net accretion of premiums and discounts	(10,323)	(10,985)
Amortization of intangible assets	6,049	5,271
Reduction FDIC receivable for shared-loss agreements	(1,834)	2,591
Net increase (decrease) in FDIC payable for shared-loss agreements	1,124	1,005
Net change in other assets	342,312	(15,078)
Net change in other liabilities	(12,642)	8,741
Net cash provided by operating activities	458,388	137,599
INVESTING ACTIVITIES
Net change in loans outstanding	(7,283)	(105,100)
Purchases of investment securities available for sale	(374,850)	(871,698)
Payments to Acquire Marketable Securities	(2,272)	0
Proceeds from maturities of investment securities held to maturity	2	15
Proceeds from maturities of investment securities available for sale	503,717	787,182
Proceeds from sales of investment securities available for sale	0	14,162
Proceeds from Sale and Maturity of Marketable Securities	664	0
Net change in overnight investments	(558,955)	(856,442)
Proceeds from sales of portfolio loans	0	32,294
Cash (paid to) received from the FDIC for shared-loss agreements	0	(2,760)
Net payment to the FDIC for termination of shared-loss agreements	0	(285)
Proceeds from sale of other real estate	8,380	8,845
Proceeds fro sales of premises and equipment	13	2,205
Additions to premises and equipment	(24,081)	(15,459)
Net cash acquired in business acquisitions	0	25,646
Net cash (used) provided by investing activities	(454,665)	(981,395)
FINANCING ACTIVITIES
Net change in time deposits	(92,064)	(107,339)
Net change in demand and other interest-bearing deposits	795,034	827,009
Net change in short-term borrowings	(139,049)	87,100
Repayment of long-term obligations	(651,451)	(442)
Cash dividends paid	(4,204)	0
Net cash provided (used) by financing activities	(91,734)	806,328
Change in cash and due from banks	(88,011)	(37,468)
Cash and due from banks at beginning of period	336,150	539,741
Cash and due from banks at end of period	248,139	502,273
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Transfers of loans to other real estate	6,582	5,822
Dividends declared but not paid	4,204	3,603
Transfer of Portfolio Loans and Leases to Held-for-sale	$ 0	$ 32,130

XML

Accounting Policies and Basis of Presentation

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Accounting Policies and Basis of Presentation

ACCOUNTING POLICIES AND BASIS OF PRESENTATION

First Citizens BancShares, Inc. (BancShares) is a financial holding company organized under the laws of Delaware and conducts operations through its banking subsidiary, First-Citizens Bank & Trust Company (FCB), which is headquartered in Raleigh, North Carolina.

General

These consolidated financial statements and notes thereto are presented in accordance with instructions for Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States of America (GAAP). In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and consolidated results of operations have been made. The unaudited interim consolidated financial statements included in this Form 10-Q should be read in conjunction with the consolidated financial statements and notes to consolidated financial statements included in BancShares' Annual Report on Form 10-K for the year ended December 31, 2017.

Reclassifications

In certain instances, amounts reported in prior years' consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders' equity or net income.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates, and different assumptions in the application of these policies could result in material changes in BancShares' consolidated financial position, the consolidated results of its operations or related disclosures. Material estimates that are particularly susceptible to significant change include:

• Allowance for loan and lease losses;

• Fair value of financial instruments, including acquired assets and assumed liabilities;

• Pension plan assumptions;

• Cash flow estimates on purchased credit-impaired loans;

• Goodwill and other intangible assets;

• Federal Deposit Insurance Corporation (FDIC) shared-loss payable; and

• Income tax assets, liabilities and expense

Recently Adopted Accounting Pronouncements

FASB ASU 2018-03, Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10)

The amendments in this ASU provide clarification on certain aspects related to the guidance issued in ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The areas for correction or improvement include (1) equity securities without a readily determinable fair value - discontinuation; (2) equity securities without a readily determinable fair value - adjustments; (3) forward contracts and purchased options; (4) presentation requirements for certain fair value option liabilities; (5) fair value option liabilities denominated in a foreign currency; and (6) transition guidance for equity securities without a readily determinable fair value.

This ASU is effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Early adoption is permitted. We adopted the guidance effective in the first quarter of 2018. The adoption did not have a material impact on our consolidated financial position or consolidated results of operations.

FASB ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

This ASU requires a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 (Tax Act), which was enacted on December 22, 2017. The Tax Act included a reduction to the corporate income tax rate from 35 percent to 21 percent effective January 1, 2018. The amount of the reclassification would be the difference between the historical corporate income tax rate and the newly enacted 21 percent corporate income tax rate.

The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We adopted the guidance effective in the first quarter of 2018. The change in accounting principle was accounted for as a cumulative-effect adjustment to the balance sheet resulting in a $31.3 million increase to retained earnings and a corresponding decrease to AOCI on January 1, 2018.

FASB ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

This ASU requires employers to present the service cost component of the net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Employers will present the other components separately from the line item that includes the service cost. In addition, only the service cost component of net benefit cost is eligible for capitalization.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted the guidance effective in the first quarter of 2018. The adoption did not have a material impact on our consolidated financial position or consolidated results of operations.

FASB ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments

This ASU addresses the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments in this ASU provide guidance on (1) debt prepayment or debt extinguishment costs; (2) settlement of zero-coupon debt instruments; (3) contingent consideration payments made after a business combination; (4) proceeds from the settlement of insurance claims; (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; (6) distributions received from equity method investees; (7) beneficial interests in securitization transactions; and (8) separately identifiable cash flows and application of the predominance principle.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The guidance requires application using a retrospective transition method. We adopted the guidance effective in the first quarter of 2018. The adoption did not have any impact on our Consolidated Statements of Cash Flows.

FASB ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities

This ASU addresses certain aspects of recognition, measurement, presentation and disclosure of certain financial instruments. The amendments in this ASU (1) require most equity investments to be measured at fair value with changes in fair value recognized in net income; (2) simplify the impairment assessment of equity investments without a readily determinable fair value; (3) eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value for financial instruments measured at amortized cost on the balance sheet; (4) require public business entities to use exit price notion, rather than entry prices, when measuring fair value of financial instruments for disclosure purposes; (5) require separate presentation of financial assets and financial liabilities by measurement category and form of financial assets on the balance sheet or the accompanying notes to the financial statements; (6) require separate presentation in other comprehensive income of 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 organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; and (7) state that a valuation allowance on deferred tax assets related to available-for-sale securities should be evaluated in combination with other deferred tax assets.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted the guidance effective in the first quarter of 2018. The change in accounting principle was accounted for as a cumulative-effect adjustment to the balance sheet resulting in an $18.7 million increase to retained earnings and a decrease to AOCI on January 1, 2018. With the adoption of this ASU equity securities can no longer be classified as available for sale, as such marketable equity securities will be disclosed as a separate line item on the balance sheet with changes in the fair value of equity securities reflected in net income.

For equity investments without a readily determinable fair value, BancShares has elected to measure the equity investments using the measurement alternative which requires BancShares to make a qualitative assessment of whether the investment is impaired at each reporting period. Under the measurement alternative these investments will be measured at cost, less any impairment, plus or minus changes resulting from observable price changes in orderly transactions for an identical or similar investment of the same issuer. If a qualitative assessment indicates that the investment is impaired, BancShares will estimate the investment's fair value in accordance with ASC 820 and, if the fair value is less than the investment's carrying value, recognize an impairment loss in net income equal to the difference between carrying value and fair value. Equity investments without a readily determinable fair value are recorded within other assets in the consolidated balance sheets.

FASB ASU 2014-09, Revenue from Contracts with Customers (Topic 606)

In May 2014, the FASB issued a standard on the recognition of revenue from contracts with customers with the core principle being for a company to recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the consideration to which the company expects to be entitled in exchange for those goods or services. The new standard, which provides a five step model to determine when and how revenue is recognized, also results in enhanced disclosures about revenue, provides guidance for transactions that were not previously addressed comprehensively and improves guidance for multiple-element arrangements.

Per ASU 2015-14, Deferral of the Effective Date, this guidance was deferred and is effective for fiscal periods beginning after December 15, 2017, including interim reporting periods within that reporting period. We adopted the guidance effective in the first quarter of 2018. Our revenue is comprised primarily of net interest income on financial assets and liabilities, which is explicitly excluded from the scope of the new guidance, and noninterest income. The contracts that are in scope of the guidance are primarily related to cardholder and merchant services income, service charges on deposit accounts, wealth management services income, other service charges and fees, insurance commissions, ATM income, sales of other real estate and other. Based on our overall assessment of revenue streams and review of related contracts affected by the ASU, the adoption of this guidance did not change the method in which we currently recognize revenue.

We also completed an evaluation of the costs related to these revenue streams to determine whether such costs should be presented as expenses or contra-revenue (i.e., gross vs. net). Based on this evaluation, we determined that the classification of cardholder and merchant processing costs as well as expenses for cardholder reward programs should be netted against cardholder and merchant services income. We used the full retrospective method of adoption and restated the prior financial statements to net the cardholder and merchant processing costs against the related cardholder and merchant services income. These classification changes resulted in changes to both noninterest income and noninterest expense, however, there was no change to previously reported net income. Merchant processing expenses of $18.3 million have been reclassified and reported as a component of merchant services income for the three months ended March 31, 2017. Cardholder processing expenses of $6.8 million and cardholder reward programs expense of $2.5 million have been reclassified and reported as a component of cardholder services income for the three months ended March 31, 2017.

Recently Issued Accounting Pronouncements

FASB ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment

This ASU eliminates Step 2 from the goodwill impairment test. 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 ASU, 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. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative test.

This ASU will be effective for BancShares' annual or interim goodwill impairment tests for fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We expect to adopt the guidance for our annual impairment test in fiscal year 2020. BancShares does not anticipate any impact to our consolidated financial position or consolidated results of operations as a result of the adoption.

FASB ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

This ASU eliminates the delayed recognition of the full amount of credit losses until the loss was probable of occurring and instead will reflect an entity's current estimate of all expected credit losses. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The ASU does not specify a method for measuring expected credit losses and allows an entity to apply methods that reasonably reflect its expectations of the credit loss estimate based on the entity's size, complexity and risk profile. In addition, the disclosures of credit quality indicators in relation to the amortized cost of financing receivables, a current disclosure requirement, are further disaggregated by year of origination.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018. We will adopt the guidance by the first quarter of 2020 with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption. For BancShares, the standard will apply to loans, unfunded loan commitments and debt securities. We have formed a cross-functional team co-led by Corporate Finance and Risk Management with executive sponsorship and engaged a third party to assist with the adoption. The implementation team has developed a detailed project plan and is staying informed about the broader industry's perspective and insights, and identifying and researching key decision points. We have completed the readiness assessment and gap analysis related to data, modeling IT, accounting policy, controls and reporting which has enabled us to determine the areas of focus and estimate total body of work. Our current critical activities include model design, accounting policy development, data feasibility analysis, evaluation of reporting and disclosure solutions and completion of specific work stream project plans. We will continue to evaluate the impact the new standard will have on our consolidated financial statements as the final impact will be dependent, among other items, upon the loan portfolio composition and credit quality at the adoption date, as well as economic conditions, financial models used and forecasts at that time.

FASB ASU 2016-02, Leases (Topic 842)

This ASU increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The key difference between existing standards and this ASU is the requirement for lessees to recognize all lease contracts on their balance sheet. This ASU requires lessees to classify leases as either operating or finance leases, which are substantially similar to the current operating and capital leases classifications. The distinction between these two classifications under the new standard does not relate to balance sheet treatment, but relates to treatment in the statements of income and cash flows. Lessor guidance remains largely unchanged with the exception of how a lessor determines the appropriate lease classification for each lease to better align the lessor guidance with revised lessee classification guidance.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We will adopt during the first quarter of 2019. We expect an increase to the Consolidated Balance Sheets for right-of-use assets and associated lease liabilities, as well as resulting depreciation expense of the right-of-use assets and interest expense of the lease liabilities in the Consolidated Statements of Income, for arrangements previously accounted for as operating leases. Additionally, adding these assets to our balance sheet will impact our total risk-weighted assets used to determine our regulatory capital levels. Our impact analysis on this change in accounting principle estimates an increase to the Consolidated Balance Sheets for total lease liability ranging between $65.0 million and $85.0 million, as the initial gross up of both assets and liabilities. Capital is expected to be impacted by an estimated four to six basis points. These are preliminary estimates subject to change and will continue to be refined closer to adoption.

Revenue Recognition

The principles based standard requires disclosure of qualitative and quantitative information surrounding the amount, nature, timing and uncertainty of revenues and cash flows arising from contracts with customers. The core principle of the new standard is that revenue should be recognized when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services.

Descriptions of our noninterest revenue-generating activities that are within the scope of the new revenue ASU is broadly segregated as follows:

Cardholder and Merchant Services - These represent interchange fees from customer debit and credit card transactions that are earned at the time a cardholder engages in a transaction with a merchant as well as fees charged to merchants for providing them the ability to accept and process the debit and credit card transaction. Revenue is recognized when the performance obligation has been met as it is satisfied upon the completion of the card transaction. Additionally, ASU 2014-09 requires us to report costs associated with cardholder and merchant services transactions to be netted against the fees from such transactions.

Service Charges on Deposit Accounts - These deposit account-related fees represent monthly account maintenance and transaction-based service fees such as overdraft fees, stop payment fees and charges for issuing cashier's checks and money orders. For account maintenance services, revenue is recognized at the end of the statement period when our performance obligation has been satisfied. All other revenues from transaction-based services are recognized at a point in time when the performance obligation has been completed.

Wealth Management Services - These primarily represent annuity fees, sales commissions, management fees, insurance sales, and trust and asset management fees. The performance obligation for wealth management services is the provision of services to place annuity products issued by the counterparty to investors, and the provision of services to manage the client’s assets, including brokerage custodial and other management services. Revenue is recognized over the period in which services are performed, are based on a percentage of the value of the assets under management/administration, and are fixed or variable based on account type, or are transaction-based.

Other Service Charges and Fees - These include, but are not limited to, check cashing fees, international banking fees, internet banking fees, wire transfer fees and safe deposit fees. These fees are charged, and revenue is recognized, at the point in time the service being requested by the customer is provided thus satisfying our performance obligation.

Insurance Commissions - These represent commissions earned on the issuance of insurance products and services. The performance obligation is generally satisfied upon the issuance of the insurance policy and revenue is recognized when the commission payment is remitted by the insurance carrier or policy holder depending on if the billing is performed by FCB or the carrier.

ATM Income - These represent fees imposed on customers and non-customers for engaging in an ATM transaction. Revenue is recognized at the time of the transaction as the performance obligation of rendering the ATM service has been met.

Sales of Other Real Estate - ORE property consists of foreclosed real estate used as collateral for loans, closed branches, land acquired and no longer intended for future use by FCB, and other real estate purchased for resale as ORE. Revenue is generally recognized on the date of sale where the performance obligation of providing access and transferring control of the specified ORE property to the buyer in good faith and good title is satisfied. This is recorded as a component of other noninterest income.

Other - This consists of several forms of recurring revenue such as external rental income, parking income, FHLB dividends, and income earned on changes in the cash surrender value of bank-owned life insurance, all of which are outside the scope of ASU 2014-09. The remaining miscellaneous income is the result of immaterial transactions where revenue is recognized when, or as, the performance obligation is satisfied.

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Business Combinations

3 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

Business Combinations

NOTE B - BUSINESS COMBINATIONS

HomeBancorp, Inc.

On May 1, 2018, FCB completed the merger of Tampa, Florida-based HomeBancorp, Inc. (HomeBancorp) and its subsidiary, HomeBanc, into FCB. Under the terms of the merger agreement, cash consideration of $15.03 was paid to the shareholders of HomeBancorp for each share of HomeBancorp's common stock, with total consideration paid of $113.7 million. The merger will allow FCB to expand its footprint in Florida by entering into two new markets in Tampa and Orlando. As of March 31, 2018, HomeBancorp had $912.6 million in consolidated assets, $597.7 million in loans and $647.1 million in deposits. Due to the close proximity of the acquisition date and the date that BancShares' financial statements were issued, preliminary fair value estimates are not available.

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Loans and Leases

3 Months Ended

Mar. 31, 2018

Loans and Leases Receivable Disclosure [Abstract]

Loans and Leases

LOANS AND LEASES

BancShares' accounting methods for loans and leases differ depending on whether they are purchased credit-impaired (PCI) or non-PCI. Non-PCI loans and leases include originated commercial and noncommercial, purchased non-impaired loans, purchased leases and certain purchased revolving credit. For purchased non-impaired loans to be included as non-PCI, it must be determined that the loans do not have any credit deterioration at the time of acquisition. Conversely, loans for which it is probable at acquisition that all required payments will not be collected in accordance with contractual terms are considered impaired and, therefore, classified as PCI loans. PCI loans are accounted for under the guidance in ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. PCI loans are recorded at fair value at the date of acquisition. No allowance for loan and lease losses is recorded on the acquisition date as the fair value of the acquired assets incorporates assumptions regarding credit risk over the life of the loans. An allowance is recorded if there is additional credit deterioration after the acquisition date.

BancShares reports PCI and non-PCI loan portfolios separately, and each portfolio is further divided into commercial and non-commercial based on the type of borrower, purpose, collateral, and/or our underlying credit management processes. Additionally, commercial and non-commercial loans are assigned to loan classes, which further disaggregate loans based upon common risk characteristics.

Commercial –Commercial loan classes include construction and land development, commercial mortgage, other commercial real estate, commercial and industrial, lease financing and other.

Construction and land development – Construction and land development consists of loans to finance land for development, investment, and use in a commercial business enterprise; multifamily apartments; and other commercial buildings that may be owner-occupied or income generating investments for the owner.

Commercial mortgage – Commercial mortgage consists of loans to purchase or refinance owner-occupied nonresidential and investment properties. Investment properties include office buildings and other facilities that are rented or leased to unrelated parties.

Other commercial real estate – Other commercial real estate consists of loans secured by farmland (including residential farms and other improvements) and multifamily (5 or more) residential properties.

Commercial and industrial – Commercial and industrial consists of loans or lines of credit to finance corporate credit cards, accounts receivable, inventory and other general business purposes.

Lease financing – Lease financing consists solely of lease financing agreements for business equipment, vehicles and other assets.

Other – Other consists of all other commercial loans not classified in one of the preceding classes. These typically include loans to non-profit organizations such as churches, hospitals, educational and charitable organizations, and certain loans repurchased with government guarantees.

Noncommercial – Noncommercial loan classes consist of residential and revolving mortgage, construction and land development, and consumer loans.

Residential mortgage – Residential real estate consists of loans to purchase, construct or refinance the borrower's primary dwelling, second residence or vacation home.

Revolving mortgage – Revolving mortgage consists of home equity lines of credit that are secured by first or second liens on the borrower's primary residence.

Construction and land development – Construction and land development consists of loans to construct the borrower's primary or secondary residence or vacant land upon which the owner intends to construct a dwelling at a future date.

Consumer – Consumer loans consist of installment loans to finance purchases of vehicles, unsecured home improvements, student loans and revolving lines of credit that can be secured or unsecured, including personal credit cards.

Loans and leases outstanding included the following at March 31, 2018 and December 31, 2017:

(Dollars in thousands)	March 31, 2018		December 31, 2017
Non-PCI loans and leases:
Commercial:
Construction and land development	$	738,413	$	669,215
Commercial mortgage	9,859,136		9,729,022
Other commercial real estate	386,734		473,433
Commercial and industrial	2,695,205		2,730,407
Lease financing	910,589		894,801
Other	281,485		302,176
Total commercial loans	14,871,562		14,799,054
Noncommercial:
Residential mortgage	3,587,791		3,523,786
Revolving mortgage	2,651,648		2,701,525
Construction and land development	243,114		248,289
Consumer	1,554,025		1,561,173
Total noncommercial loans	8,036,578		8,034,773
Total non-PCI loans and leases	22,908,140		22,833,827
PCI loans:
Commercial:
Construction and land development	9,316		10,135
Commercial mortgage	325,073		358,103
Other commercial real estate	16,179		17,124
Commercial and industrial	3,732		6,374
Other	1,628		1,683
Total commercial loans	355,928		393,419
Noncommercial:
Residential mortgage	282,338		299,318
Revolving mortgage	60,388		63,908
Construction and land development	3,006		4,163
Consumer	2,177		2,190
Total noncommercial loans	347,909		369,579
Total PCI loans	703,837		762,998
Total loans and leases	$	23,611,977	$	23,596,825

At March 31, 2018, $65.5 million of total residential loans and leases were covered under shared-loss agreements with the FDIC, compared to $67.8 million at December 31, 2017. The shared-loss agreements, for their terms, protect BancShares from a substantial portion of the credit and asset quality risk that would otherwise be incurred.

At March 31, 2018, $9.11 billion in noncovered loans with a lendable collateral value of $6.26 billion were used to secure $85.2 million in Federal Home Loan Bank (FHLB) of Atlanta advances, resulting in additional borrowing capacity of $6.17 billion. At December 31, 2017, $8.75 billion in noncovered loans with a lendable collateral value of $6.08 billion were used to secure $835.2 million in FHLB of Atlanta advances, resulting in additional borrowing capacity of $5.24 billion. At March 31, 2018, $2.86 billion in noncovered loans with a lendable collateral value of $2.16 billion were used to secure additional borrowing capacity at the Federal Reserve Bank (FRB). At December 31, 2017, $2.77 billion in noncovered loans with a lendable collateral value of $2.08 billion were used to secure additional borrowing capacity at the FRB.

Certain residential real estate loans are originated to be sold to investors and are recorded in loans held for sale at fair value. Loans held for sale totaled $46.7 million and $51.2 million at March 31, 2018 and December 31, 2017, respectively. In addition, we may change our strategy for certain portfolio loans and sell them in the secondary market. At that time, portfolio loans are transferred to loans held for sale at the lower of amortized cost or market. During the first quarter of 2018, total proceeds from sales of loans held for sale were $138.5 million and there were no transfers to loans held for sale from the residential mortgage portfolio. During the first quarter of 2017, total proceeds from sales of loans held for sale were $195.1 million of which $32.3 million in sales were transferred to loans held for sale from the residential mortgage portfolio, resulting in a gain of $164 thousand.

Net deferred fees on originated non-PCI loans and leases, including unearned income as well as unamortized costs and fees, were $1.5 million and $1.7 million at March 31, 2018 and December 31, 2017, respectively. The unamortized discount related to purchased non-PCI loans and leases in the Guaranty Bank (Guaranty), Cordia Bancorp Inc. (Cordia) and First Citizens Bancorporation, Inc. (Bancorporation) acquisitions was $13.3 million, $2.5 million and $16.4 million, respectively, at March 31, 2018. At December 31, 2017, the unamortized discount related to purchased non-PCI loans and leases from the Guaranty, Cordia and Bancorporation acquisitions was $14.2 million, $2.7 million and $18.1 million, respectively. During the three months ended March 31, 2018 and March 31, 2017, accretion income on purchased non-PCI loans and leases was $2.9 million and $3.2 million, respectively.

Credit quality indicators

Loans and leases are monitored for credit quality on a recurring basis. The credit quality indicators used are dependent on the portfolio segment to which the loan relates. Commercial and noncommercial loans and leases have different credit quality indicators as a result of the unique characteristics of the loan segment being evaluated. The credit quality indicators for non-PCI and PCI commercial loans and leases are developed through a review of individual borrowers on an ongoing basis. Commercial loans are evaluated periodically with more frequent evaluations done on more severely criticized loans or leases. The credit quality indicators for non-PCI and PCI noncommercial loans are based on the delinquency status of the borrower. As the borrower becomes more delinquent, the likelihood of loss increases. The indicators represent the rating for loans or leases as of the date presented based on the most recent assessment performed. These credit quality indicators are defined as follows:

Pass – A pass rated asset is not adversely classified because it does not display any of the characteristics for adverse classification.

Special mention – A special mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, such potential weaknesses may result in deterioration of the repayment prospects or collateral position at some future date. Special mention assets are not adversely classified and do not warrant adverse classification.

Substandard – A substandard asset is inadequately protected by the current net worth and paying capacity of the borrower or of the collateral pledged, if any. Assets classified as substandard generally have a well-defined weakness, or weaknesses, that jeopardize the liquidation of the debt. These assets are characterized by the distinct possibility of loss if the deficiencies are not corrected.

Doubtful – An asset classified as doubtful has all the weaknesses inherent in an asset classified substandard with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable on the basis of currently existing facts, conditions and values.

Loss – Assets classified as loss are considered uncollectible and of such little value that it is inappropriate to be carried as an asset. This classification is not necessarily equivalent to any potential for recovery or salvage value, but rather that it is not appropriate to defer a full charge-off even though partial recovery may be affected in the future.

Ungraded – Ungraded loans represent loans that are not included in the individual credit grading process due to their relatively small balances or borrower type. The majority of ungraded loans at March 31, 2018 and December 31, 2017 relate to business credit cards. Business credit card loans are subject to automatic charge-off when they become 120 days past due in the same manner as unsecured consumer lines of credit. The remaining balance is comprised of a small amount of commercial mortgage, lease financing and other commercial real estate loans.

Non-PCI loans and leases outstanding at March 31, 2018 and December 31, 2017 by credit quality indicator are provided below:

	March 31, 2018
(Dollars in thousands)	Non-PCI commercial loans and leases
Grade:	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	733,253	$	9,661,079	$	382,679	$	2,476,337	$	900,464	$	278,367	$	14,432,179
Special mention	483		81,680		1,187		37,571		3,347		1,107		125,375
Substandard	4,639		115,039		2,868		19,357		6,734		1,889		150,526
Doubtful	—		1,338		—		836		—		72		2,246
Ungraded	38		—		—		161,104		44		50		161,236
Total	$	738,413	$	9,859,136	$	386,734	$	2,695,205	$	910,589	$	281,485	$	14,871,562
	December 31, 2017
	Non-PCI commercial loans and leases
	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	665,197	$	9,521,019	$	468,942	$	2,511,307	$	883,779	$	298,064	$	14,348,308
Special mention	691		78,643		1,260		44,130		4,340		2,919		131,983
Substandard	3,327		128,848		3,224		18,617		6,585		1,193		161,794
Doubtful	—		262		—		385		—		—		647
Ungraded	—		250		7		155,968		97		—		156,322
Total	$	669,215	$	9,729,022	$	473,433	$	2,730,407	$	894,801	$	302,176	$	14,799,054

	March 31, 2018
	Non-PCI noncommercial loans and leases
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	3,542,327	$	2,628,122	$	239,107	$	1,541,749	$	7,951,305
30-59 days past due	23,833		9,364		2,885		6,935		43,017
60-89 days past due	2,429		3,636		—		2,440		8,505
90 days or greater past due	19,202		10,526		1,122		2,901		33,751
Total	$	3,587,791	$	2,651,648	$	243,114	$	1,554,025	$	8,036,578
	December 31, 2017
	Non-PCI noncommercial loans and leases
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	3,465,935	$	2,674,390	$	239,648	$	1,546,473	$	7,926,446
30-59 days past due	27,886		13,428		7,154		8,812		57,280
60-89 days past due	8,064		3,485		108		2,893		14,550
90 days or greater past due	21,901		10,222		1,379		2,995		36,497
Total	$	3,523,786	$	2,701,525	$	248,289	$	1,561,173	$	8,034,773

PCI loans outstanding at March 31, 2018 and December 31, 2017 by credit quality indicator are provided below:

	March 31, 2018
(Dollars in thousands)	PCI commercial loans
Grade:	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	3,691	$	157,187	$	12,739	$	1,642	$	254	$	175,513
Special mention	338		61,443		307		488		928		63,504
Substandard	4,231		101,734		2,615		1,492		446		110,518
Doubtful	1,056		4,709		518		81		—		6,364
Ungraded	—		—		—		29		—		29
Total	$	9,316	$	325,073	$	16,179	$	3,732	$	1,628	$	355,928
	December 31, 2017
	PCI commercial loans
	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	1,817	$	181,353	$	13,830	$	4,057	$	275	$	201,332
Special mention	320		61,295		323		374		945		63,257
Substandard	5,792		106,807		2,163		1,843		463		117,068
Doubtful	2,206		8,648		808		73		—		11,735
Ungraded	—		—		—		27		—		27
Total	$	10,135	$	358,103	$	17,124	$	6,374	$	1,683	$	393,419

	March 31, 2018
	PCI noncommercial loans
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total PCI noncommercial loans
Current	$	249,443	$	53,885	$	2,420	$	2,095	$	307,843
30-59 days past due	9,196		1,662		19		40		10,917
60-89 days past due	1,436		851		—		—		2,287
90 days or greater past due	22,263		3,990		567		42		26,862
Total	$	282,338	$	60,388	$	3,006	$	2,177	$	347,909
	December 31, 2017
	PCI noncommercial loans
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total PCI noncommercial loans
Current	$	257,166	$	55,871	$	3,521	$	2,074	$	318,632
30-59 days past due	10,525		2,767		—		51		13,343
60-89 days past due	4,846		701		642		23		6,212
90 days or greater past due	26,781		4,569		—		42		31,392
Total	$	299,318	$	63,908	$	4,163	$	2,190	$	369,579

The aging of the outstanding non-PCI loans and leases, by class, at March 31, 2018 and December 31, 2017 is provided in the table below.

The calculation of days past due begins on the day after payment is due and includes all days through which all required interest or principal has not been paid. Loans and leases 30 days or less past due are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.

	March 31, 2018
(Dollars in thousands)	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	2,011	$	771	$	357	$	3,139	$	735,274	$	738,413
Commercial mortgage	9,813		4,738		7,058		21,609		9,837,527		9,859,136
Other commercial real estate	94		22		73		189		386,545		386,734
Commercial and industrial	8,273		1,844		1,503		11,620		2,683,585		2,695,205
Lease financing	3,677		45		1,512		5,234		905,355		910,589
Residential mortgage	23,833		2,429		19,202		45,464		3,542,327		3,587,791
Revolving mortgage	9,364		3,636		10,526		23,526		2,628,122		2,651,648
Construction and land development - noncommercial	2,885		—		1,122		4,007		239,107		243,114
Consumer	6,935		2,440		2,901		12,276		1,541,749		1,554,025
Other	46		47		129		222		281,263		281,485
Total non-PCI loans and leases	$	66,931	$	15,972	$	44,383	$	127,286	$	22,780,854	$	22,908,140
	December 31, 2017
	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	491	$	442	$	357	$	1,290	$	667,925	$	669,215
Commercial mortgage	12,288		2,375		6,490		21,153		9,707,869		9,729,022
Other commercial real estate	107		—		75		182		473,251		473,433
Commercial and industrial	6,694		1,510		1,266		9,470		2,720,937		2,730,407
Lease financing	2,983		167		973		4,123		890,678		894,801
Residential mortgage	27,886		8,064		21,901		57,851		3,465,935		3,523,786
Revolving mortgage	13,428		3,485		10,222		27,135		2,674,390		2,701,525
Construction and land development - noncommercial	7,154		108		1,379		8,641		239,648		248,289
Consumer	8,812		2,893		2,995		14,700		1,546,473		1,561,173
Other	188		6		133		327		301,849		302,176
Total non-PCI loans and leases	$	80,031	$	19,050	$	45,791	$	144,872	$	22,688,955	$	22,833,827

The recorded investment, by class, in loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at March 31, 2018 and December 31, 2017 for non-PCI loans and leases, were as follows:

	March 31, 2018				December 31, 2017
(Dollars in thousands)	Nonaccrual loans and leases		Loans and leases > 90 days and accruing		Nonaccrual loans and leases		Loans and leases > 90 days and accruing
Non-PCI loans and leases:
Construction and land development - commercial	$	1,059	$	—	$	1,040	$	—
Commercial mortgage	20,505		32		22,625		397
Other commercial real estate	616		—		916		—
Commercial and industrial	2,928		721		2,884		428
Lease financing	1,687		—		1,992		—
Residential mortgage	37,038		—		38,942		—
Revolving mortgage	21,421		—		19,990		—
Construction and land development - noncommercial	1,722		—		1,989		—
Consumer	2,082		2,277		1,992		2,153
Other	202		—		164		—
Total non-PCI loans and leases	$	89,260	$	3,030	$	92,534	$	2,978

The following table provides changes in the carrying value of PCI loans during the three months ended March 31, 2018 and March 31, 2017:

(Dollars in thousands)	2018			2017
Balance at January 1	$	762,998		$	809,169
Fair value of acquired loans	—			85,149
Accretion	17,973			19,351
Payments received and other changes, net	(77,134		)	(64,853		)
Balance at March 31	$	703,837		$	848,816
Unpaid principal balance at March 31	$	1,108,379		$	1,155,034

The carrying value of loans on the cost recovery method was $1.3 million at March 31, 2018 and $1.1 million at December 31, 2017. The cost recovery method is applied to loans when the timing of future cash flows is not reasonably estimable due to borrower nonperformance or uncertainty in the ultimate disposition of the asset. The recorded investment of PCI loans on nonaccrual status was $1.6 million and $624 thousand at March 31, 2018 and December 31, 2017, respectively.

During the three months ended March 31, 2018 and March 31, 2017, accretion income on PCI loans was $18.0 million and $19.4 million, respectively.

For PCI loans, improved credit loss expectations generally result in the reclassification of nonaccretable difference to accretable yield. Changes in expected cash flow not related to credit improvements or deterioration do not affect the nonaccretable difference.

The following table documents changes to the amount of accretable yield for the first three months of 2018 and 2017.

(Dollars in thousands)	2018			2017
Balance at January 1	$	316,679		$	335,074
Additions from acquisitions	—			16,653
Accretion	(17,973		)	(19,351		)
Reclassifications (to) from nonaccretable difference	(929		)	11,277
Changes in expected cash flows that do not affect nonaccretable difference	11,568			(2,179		)
Balance at March 31	$	309,345		$	341,474

XML

Allowance for Loan and Lease Losses

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Allowance

NOTE E - ALLOWANCE FOR LOAN AND LEASE LOSSES (ALLL)

The following tables present the activity in the ALLL for non-PCI loan and lease losses by loan class for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Lease financing			Other			Residential mortgage			Revolving mortgage			Construction and land development - non- commercial			Consumer			Total
Balance at January 1	$	24,470		$	45,005		$	4,571		$	53,697		$	6,127		$	4,689		$	15,706		$	22,436		$	3,962		$	31,204		$	211,867
Provision	2,225			(1,365		)	(1,293		)	(425		)	987			114			1,512			466			107			2,923			5,251
Charge-offs	—			(46		)	—			(1,475		)	(854		)	(3		)	(806		)	(992		)	(182		)	(5,255		)	(9,613		)
Recoveries	23			239			145			1,219			41			42			77			194			26			1,309			3,315
Balance at March 31	$	26,718		$	43,833		$	3,423		$	53,016		$	6,301		$	4,842		$	16,489		$	22,104		$	3,913		$	30,181		$	210,820
	Three months ended March 31, 2017
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Lease financing			Other			Residential mortgage			Revolving mortgage			Construction and land development - non- commercial			Consumer			Total
Balance at January 1	$	28,877		$	48,278		$	3,269		$	50,225		$	5,907		$	3,127		$	14,447		$	21,013		$	1,596		$	28,287		$	205,026
Provision	2,536			6			304			3,592			575			517			1,351			550			(83		)	1,728			11,076
Charge-offs	(77		)	(37		)	(5		)	(3,253		)	(173		)	(123		)	(250		)	(825		)	—			(3,966		)	(8,709		)
Recoveries	55			364			4			265			6			13			287			552			—			1,080			2,626
Balance at March 31	$	31,391		$	48,611		$	3,572		$	50,829		$	6,315		$	3,534		$	15,835		$	21,290		$	1,513		$	27,129		$	210,019

The following tables present the allowance for non-PCI loan and lease losses and the recorded investment in loans, by loan class, based on impairment method as of March 31, 2018 and December 31, 2017:

	March 31, 2018
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Lease financing		Other		Residential mortgage		Revolving mortgage		Construction and land development - non-commercial		Consumer		Total
Allowance for loan and lease losses:
ALLL for loans and leases individually evaluated for impairment	$	171	$	3,521	$	306	$	621	$	494	$	—	$	2,905	$	1,053	$	82	$	713	$	9,866
ALLL for loans and leases collectively evaluated for impairment	26,547		40,312		3,117		52,395		5,807		4,842		13,584		21,051		3,831		29,468		200,954
Total allowance for loan and lease losses	$	26,718	$	43,833	$	3,423	$	53,016	$	6,301	$	4,842	$	16,489	$	22,104	$	3,913	$	30,181	$	210,820
Loans and leases:
Loans and leases individually evaluated for impairment	$	1,131	$	70,277	$	1,499	$	7,611	$	2,166	$	—	$	41,347	$	25,525	$	3,803	$	2,591	$	155,950
Loans and leases collectively evaluated for impairment	737,282		9,788,859		385,235		2,687,594		908,423		281,485		3,546,444		2,626,123		239,311		1,551,434		22,752,190
Total loan and leases	$	738,413	$	9,859,136	$	386,734	$	2,695,205	$	910,589	$	281,485	$	3,587,791	$	2,651,648	$	243,114	$	1,554,025	$	22,908,140
	December 31, 2017
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Lease financing		Other		Residential mortgage		Revolving mortgage		Construction and land development - non-commercial		Consumer		Total
Allowance for loan and lease losses:
ALLL for loans and leases individually evaluated for impairment	$	185	$	3,648	$	209	$	665	$	397	$	—	$	2,733	$	1,085	$	68	$	738	$	9,728
ALLL for loans and leases collectively evaluated for impairment	24,285		41,357		4,362		53,032		5,730		4,689		12,973		21,351		3,894		30,466		202,139
Total allowance for loan and lease losses	$	24,470	$	45,005	$	4,571	$	53,697	$	6,127	$	4,689	$	15,706	$	22,436	$	3,962	$	31,204	$	211,867
Loans and leases:
Loans and leases individually evaluated for impairment	$	788	$	73,655	$	1,857	$	7,974	$	1,914	$	521	$	37,842	$	23,770	$	4,551	$	2,774	$	155,646
Loans and leases collectively evaluated for impairment	668,427		9,655,367		471,576		2,722,433		892,887		301,655		3,485,944		2,677,755		243,738		1,558,399		22,678,181
Total loan and leases	$	669,215	$	9,729,022	$	473,433	$	2,730,407	$	894,801	$	302,176	$	3,523,786	$	2,701,525	$	248,289	$	1,561,173	$	22,833,827

The following tables show the activity in the allowance for PCI loan losses by loan class for the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31, 2018
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Residential mortgage			Revolving mortgage			Construction and land development - noncommercial			Consumer and other			Total
Balance at January 1	$	142		$	6,564		$	221		$	306		$	2,117		$	259		$	193		$	224		$	10,026
Provision	310			1,608			(46		)	13			264			209			(50		)	46			2,354
Charge-offs	—			(84		)	—			—			—			—			—			—			(84		)
Recoveries	—			—			—			—			—			—			—			—			—
Balance at March 31	$	452		$	8,088		$	175		$	319		$	2,381		$	468		$	143		$	270		$	12,296
	Three months ended March 31, 2017
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Residential mortgage			Revolving mortgage			Construction and land development - noncommercial			Consumer and other			Total
Balance at January 1	$	483		$	6,423		$	502		$	504		$	4,818		$	956		$	—		$	83		$	13,769
Provision	(186		)	(1,230		)	(158		)	(142		)	(545		)	(550		)	—			(34		)	(2,845		)
Charge-offs	—			—			—			—			—			—			—			—			—
Recoveries	—			—			—			—			—			—			—			—			—
Balance at March 31	$	297		$	5,193		$	344		$	362		$	4,273		$	406		$	—		$	49		$	10,924

The following tables show the ending balances of PCI loans and related allowance by class of loans as of March 31, 2018 and December 31, 2017:

	March 31, 2018
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Residential mortgage		Revolving mortgage		Construction and land development - noncommercial		Consumer and other		Total
ALLL for loans acquired with deteriorated credit quality	$	452	$	8,088	$	175	$	319	$	2,381	$	468	$	143	$	270	$	12,296
Loans acquired with deteriorated credit quality	9,316		325,073		16,179		3,732		282,338		60,388		3,006		3,805		703,837
	December 31, 2017
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Residential mortgage		Revolving mortgage		Construction and land development - noncommercial		Consumer and other		Total
ALLL for loans acquired with deteriorated credit quality	$	142	$	6,564	$	221	$	306	$	2,117	$	259	$	193	$	224	$	10,026
Loans acquired with deteriorated credit quality	10,135		358,103		17,124		6,374		299,318		63,908		4,163		3,873		762,998

As of March 31, 2018 and December 31, 2017, $170.4 million and $279.8 million, respectively, in PCI loans experienced an adverse change in expected cash flows since the date of acquisition.

The following tables provide information on non-PCI impaired loans and leases individually evaluated as of March 31, 2018 and December 31, 2017 including interest income recognized in the period during which the loans and leases were considered impaired.

	March 31, 2018
(Dollars in thousands)	With a recorded allowance		With no recorded allowance		Total		Unpaid principal balance		Related allowance recorded
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	740	$	391	$	1,131	$	1,461	$	171
Commercial mortgage	37,100		33,177		70,277		75,584		3,521
Other commercial real estate	1,086		413		1,499		1,614		306
Commercial and industrial	5,514		2,097		7,611		10,882		621
Lease financing	1,896		270		2,166		3,610		494
Residential mortgage	23,417		17,930		41,347		44,065		2,905
Revolving mortgage	9,998		15,527		25,525		27,948		1,053
Construction and land development - noncommercial	1,294		2,509		3,803		4,620		82
Consumer	1,744		847		2,591		2,872		713
Total non-PCI impaired loans and leases	$	82,789	$	73,161	$	155,950	$	172,656	$	9,866
	December 31, 2017
(Dollars in thousands)	With a recorded allowance		With no recorded allowance		Total		Unpaid principal balance		Related allowance recorded
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	788	$	—	$	788	$	1,110	$	185
Commercial mortgage	39,135		34,520		73,655		78,936		3,648
Other commercial real estate	1,351		506		1,857		2,267		209
Commercial and industrial	6,326		1,648		7,974		10,475		665
Lease financing	1,890		24		1,914		2,571		397
Other	—		521		521		521		—
Residential mortgage	19,135		18,707		37,842		39,946		2,733
Revolving mortgage	5,875		17,895		23,770		25,941		1,085
Construction and land development - noncommercial	592		3,959		4,551		5,224		68
Consumer	2,107		667		2,774		3,043		738
Total non-PCI impaired loans and leases	$	77,199	$	78,447	$	155,646	$	170,034	$	9,728

Non-PCI impaired loans less than $500,000 that are collectively evaluated were $46.9 million and $49.1 million at March 31, 2018 and December 31, 2017, respectively.

The following tables show the average non-PCI impaired loan balance and the interest income recognized by loan class for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018				Three months ended March 31, 2017
(Dollars in thousands)	Average balance		Interest income recognized		Average balance		Interest income recognized
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	1,155	$	11	$	1,055	$	12
Commercial mortgage	72,267		711		75,310		642
Other commercial real estate	1,713		11		1,584		8
Commercial and industrial	7,524		76		11,529		104
Lease financing	2,238		11		1,568		14
Other	—		—		196		2
Residential mortgage	38,724		275		32,963		253
Revolving mortgage	24,792		201		7,969		57
Construction and land development - noncommercial	4,104		48		2,605		33
Consumer	2,508		28		1,900		23
Total non-PCI impaired loans and leases	$	155,025	$	1,372	$	136,679	$	1,148

Troubled Debt Restructurings

BancShares accounts for certain loan modifications or restructurings as troubled debt restructurings (TDRs). In general, the modification or restructuring of a loan is considered a TDR if, for economic reasons or legal reasons related to a borrower's financial difficulties, a concession is granted to the borrower that creditors would not otherwise consider. Concessions may relate to the contractual interest rate, maturity date, payment structure or other actions. In accordance with GAAP, loans acquired under ASC 310-30, excluding pooled loans, are not initially considered to be TDRs, but can be classified as such if a modification is made subsequent to acquisition. Subsequent modification of a PCI loan accounted for in a pool that would otherwise meet the definition of a TDR is not reported, or accounted for, as a TDR since pooled PCI loans are excluded from the scope of TDR accounting.

The following table provides a summary of total TDRs by accrual status.

	March 31, 2018						December 31, 2017
(Dollars in thousands)	Accruing		Nonaccruing		Total		Accruing		Nonaccruing		Total
Commercial loans
Construction and land development - commercial	$	948	$	253	$	1,201	$	4,089	$	483	$	4,572
Commercial mortgage	61,444		12,964		74,408		62,358		15,863		78,221
Other commercial real estate	950		491		1,441		1,012		788		1,800
Commercial and industrial	7,000		1,049		8,049		7,598		910		8,508
Lease financing	902		1,066		1,968		722		1,048		1,770
Other	—		—		—		521		—		521
Total commercial TDRs	71,244		15,823		87,067		76,300		19,092		95,392
Noncommercial
Residential mortgage	36,432		9,651		46,083		34,067		9,475		43,542
Revolving mortgage	19,267		5,364		24,631		17,673		5,180		22,853
Construction and land development - noncommercial	2,914		183		3,097		—		—		—
Consumer and other	2,063		529		2,592		2,351		423		2,774
Total noncommercial TDRs	60,676		15,727		76,403		54,091		15,078		69,169
Total TDRs	$	131,920	$	31,550	$	163,470	$	130,391	$	34,170	$	164,561

The majority of TDRs are included in the special mention, substandard or doubtful credit grading categories, which results in more elevated loss expectations when projecting the expected cash flows that are used to determine the allowance for loan losses associated with these loans. When a restructured loan subsequently defaults, it is evaluated and downgraded if appropriate. The more severely graded the loan, the lower the estimated expected cash flows and the greater the allowance recorded. Further, all TDRs are individually evaluated for impairment through a review of collateral values or analysis of cash flows at least annually.

The following table shows the accrual status of non-PCI and PCI TDRs.

(Dollars in thousands)	March 31, 2018		December 31, 2017
Accruing TDRs:
PCI	$	18,380	$	18,163
Non-PCI	113,540		112,228
Total accruing TDRs	131,920		130,391
Nonaccruing TDRs:
PCI	250		272
Non-PCI	31,300		33,898
Total nonaccruing TDRs	31,550		34,170
All TDRs:
PCI	18,630		18,435
Non-PCI	144,840		146,126
Total TDRs	$	163,470	$	164,561

The following table provides the types of non-PCI TDRs made during the three months ended March 31, 2018 and March 31, 2017, as well as a summary of loans that were modified as a TDR during the twelve month periods ended March 31, 2018 and March 31, 2017 that subsequently defaulted during the three months ended March 31, 2018 and March 31, 2017. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 90 days past due for TDRs, foreclosure or charge-off, whichever occurs first.

	Three months ended March 31, 2018						Three months ended March 31, 2017
	All restructurings			Restructurings with payment default			All restructurings			Restructurings with payment default
(Dollars in thousands)	Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end
Non-PCI loans and leases
Loan term extension
Commercial mortgage	1	$	305	1	$	305	—	$	—	—	$	—
Other commercial real estate	—	—		—	—		—	—		1	530
Commercial and industrial	3	549		—	—		2	94		—	—
Residential mortgage	—	—		—	—		1	32		1	47
Revolving mortgage	1	57		—	—		—	—		—	—
Consumer	1	21		—	—		2	14		—	—
Total loan term extension	6	932		1	305		5	140		2	577
Below market interest rate
Construction and land development - commercial	—	—		—	—		1	60		—	—
Commercial mortgage	6	1,380		2	47		10	2,512		1	92
Other commercial real estate	—	—		—	—		1	4		—	—
Commercial and industrial	8	361		4	11		3	108		1	—
Lease financing	—	—		—	—		3	839		2	769
Residential mortgage	22	2,189		10	1,277		30	1,543		15	824
Revolving mortgage	25	1,659		11	431		—	—		—	—
Construction and land development - noncommercial	—	—		—	—		2	412		—	—
Consumer	5	71		3	48		2	14		—	—
Other	—	—		—	—		1	143		—	—
Total below market interest rate	66	5,660		30	1,814		53	5,635		19	1,685
Discharged from bankruptcy
Commercial mortgage	1	140		2	502		—	—		1	190
Commercial and industrial	14	474		16	177		—	—		—	—
Lease financing	5	304		2	73		16	227		—	—
Residential mortgage	8	566		6	417		3	140		1	978
Revolving mortgage	5	440		4	193		4	99		9	649
Consumer	13	262		11	183		18	193		10	128
Total discharged from bankruptcy	46	2,186		41	1,545		41	659		21	1,945
Total non-PCI restructurings	118	$	8,778	72	$	3,664	99	$	6,434	42	$	4,207

The following table provides the types of PCI TDRs made during the three months ended March 31, 2018 and March 31, 2017, as well as a summary of loans that were modified as a TDR during the twelve month periods ended March 31, 2018 and March 31, 2017 that subsequently defaulted during the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31, 2018						Three months ended March 31, 2017
	All restructurings			Restructurings with payment default			All restructurings			Restructurings with payment default
(Dollars in thousands)	Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end
PCI loans
Interest only period provided
Commercial and industrial	1	$	644	—	$	—	—	$	—	—	$	—
Total interest only	1	644		—	—		—	—		—	—
Below market interest rate
Residential mortgage	—	—		—	—		2	181		1	73
Total below market interest rate	—	—		—	—		2	181		1	73
Discharged from bankruptcy
Commercial mortgage	2	1,627		2	1,627		—	—		—	—
Total discharged from bankruptcy	2	1,627		2	1,627		—	—		—	—
Total PCI restructurings	3	$	2,271	2	$	1,627	2	$	181	1	$	73

For the three months ended March 31, 2018 and March 31, 2017, the pre-modification and post-modification outstanding recorded investments of loans modified as TDRs were not materially different.

XML

Other Real Estate Owned

3 Months Ended

Mar. 31, 2018

Banking and Thrift [Abstract]

Real Estate Owned [Text Block]

NOTE F - OTHER REAL ESTATE OWNED (OREO)

The following table explains changes in other real estate owned during the three months ended March 31, 2018 and March 31, 2017.

(Dollars in thousands)	Total
Balance at December 31, 2016	$	61,231
Additions	5,822
Sales	(8,845		)
Write-downs	(1,717		)
Balance at March 31, 2017	$	56,491
Balance at December 31, 2017	$	51,097
Additions	6,582
Sales	(8,380		)
Write-downs	(1,210		)
Balance at March 31, 2018	$	48,089

At March 31, 2018 and December 31, 2017, BancShares had $16.5 million and $19.8 million, respectively, of foreclosed residential real estate property in OREO. The recorded investment in consumer mortgage loans collateralized by residential real estate property in the process of foreclosure was $30.6 million and $26.9 million at March 31, 2018 and December 31, 2017, respectively.

XML

FDIC Shared-Loss Receivable

3 Months Ended

Mar. 31, 2018

FDIC Shared-Loss Receivable [Abstract]

FDIC Shared-Loss Receivable

FDIC SHARED-LOSS RECEIVABLE AND PAYABLE

BancShares completed six FDIC-assisted transactions with shared-loss agreements during the period beginning in 2009 through 2011. Prior to its merger into BancShares, Bancorporation completed three FDIC-assisted transactions with shared-loss agreements: Georgian Bank (acquired in 2009); Williamsburg First National Bank (acquired in 2010); and Atlantic Bank & Trust (acquired in 2011).

In 2016 and 2017, FCB entered into agreements with the FDIC to terminate the shared-loss agreements for Venture Bank, Temecula Valley Bank, Sun American Bank, Williamsburg First National Bank, Atlantic Bank & Trust and Colorado Capital Bank. As of March 31, 2018, shared-loss agreements are still active for First Regional Bank (FRB), Georgian Bank (GB) and United Western Bank (UWB). Shared-loss protection remains for single family residential loans acquired from UWB and GB in the amount of $65.5 million. FRB remained in a recovery period, where any recoveries were shared with the FDIC, through March 2018.

BancShares has a receivable from the FDIC for the expected reimbursement of losses on assets covered under the various shared-loss agreements. The shared-loss agreements are subject to interpretation by both the FDIC and BancShares, and disagreements may arise regarding coverage of losses, expenses and contingencies and requests for reimbursement may be delayed or disallowed for noncompliance.

The following table provides changes in the FDIC shared-loss receivable for the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31
(Dollars in thousands)	2018			2017
Beginning balance	$	2,223		$	4,172
Accretion	(421		)	(600		)
Net cash payments to FDIC	—			2,760
Post-acquisition adjustments	1,834			(2,591		)
Termination of FDIC shared-loss agreements	—			240
Ending balance	$	3,636		$	3,981

The shared-loss agreements for two FDIC-assisted transactions, FRB and UWB, include provisions related to payments that may be owed to the FDIC at the termination of the agreements (clawback liability). The clawback liability represents a payment by BancShares to the FDIC if actual cumulative losses on acquired covered assets are lower than the cumulative losses originally estimated by the FDIC at the time of acquisition and is recorded in the Consolidated Balance Sheets as a payable to the FDIC under the relevant shared-loss agreements. As of March 31, 2018 and December 31, 2017, the estimated clawback liability was $102.5 million and $101.3 million, respectively. The clawback liability payment dates for FRB and UWB are March 2020 and March 2021, respectively.

The following table provides changes in the FDIC shared-loss payable for the three months ended March 31, 2018 and March 31, 2017

	Three months ended March 31
(Dollars in thousands)	2018		2017
Beginning balance	$	101,342	$	97,008
Accretion	992		954
Adjustments related to changes in assumptions	132		51
Ending balance	$	102,466	$	98,013

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Mortgage Servicing Rights

3 Months Ended

Mar. 31, 2018

Mortgage Servicing Rights [Abstract]

Transfers and Servicing of Financial Assets [Text Block]

MORTGAGE SERVICING RIGHTS

Our portfolio of residential mortgage loans serviced for third parties was $2.85 billion and $2.81 billion as of March 31, 2018 and December 31, 2017, respectively.  These loans were originated by BancShares and sold to third parties on a non-recourse basis with servicing rights retained.  These retained servicing rights are recorded as a servicing asset and reported in other intangible assets on the Consolidated Balance Sheets. The mortgage servicing rights are initially recorded at fair value and then carried at the lower of amortized cost or fair market value.

The activity of the servicing asset for the three months ended March 31, 2018 and 2017 is presented in the following table:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Beginning balance	$	21,945		$	20,415
Servicing rights originated	1,200			1,702
Amortization	(1,486		)	(1,350		)
Valuation allowance reversal	—			4
Ending balance	$	21,659		$	20,771

The amortization expense related to mortgage servicing rights, included as a reduction of mortgage income in the Consolidated Statements of Income was $1.5 million and $1.4 million for the three months ended March 31, 2018 and 2017, respectively. Mortgage income for the three months ended March 31, 2018 did not include any impairment compared to an impairment reversal of $4 thousand for the three months ended March 31, 2017.

Contractually specified mortgage servicing fees, late fees, and ancillary fees earned for the three months ended March 31, 2018 and 2017 were $1.9 million and $1.7 million, respectively, and reported in mortgage income in the Consolidated Statements of Income.

Valuation of mortgage servicing rights is performed using a pooling methodology. Similar loans are pooled together and evaluated on a discounted earnings basis to determine the present value of future earnings. Key economic assumptions used to value mortgage servicing rights as of March 31, 2018 and December 31, 2017 were as follows:

	March 31, 2018			December 31, 2017
Discount rate - conventional fixed loans	9.74		%	9.41		%
Discount rate - all loans excluding conventional fixed loans	10.74		%	10.41		%
Weighted average constant prepayment rate	9.15		%	10.93		%
Weighted average cost to service a loan	$	72.8		$	64.03

The discount rate is based on the 10-year U.S. Treasury rate plus 700 basis points for conventional fixed loans and 800 basis points for all other loans. The 700 and 800 basis points are used as a risk premium when calculating the discount rate. The repayment rate is derived from the Public Securities Association Standard Prepayment model. The average cost to service a loan is based on the number of loans serviced and the total costs to service the loans.

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Repurchase Agreements

3 Months Ended

Mar. 31, 2018

Repurchase Agreements [Abstract]

Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]

REPURCHASE AGREEMENTS

BancShares utilizes securities sold under agreements to repurchase to facilitate the needs of customers and secure wholesale funding needs. Repurchase agreements are transactions whereby BancShares offers to sell to a counterparty an undivided interest in an eligible security at an agreed upon purchase price, and which obligates BancShares to repurchase the security on an agreed upon date at an agreed upon repurchase price plus interest at an agreed upon rate. Securities sold under agreements to repurchase are recorded at the amount of cash received in connection with the transaction and are generally reflected as short-term borrowings on the Consolidated Balance Sheets.

BancShares monitors collateral levels on a continuous basis and maintains records of each transaction specifically describing the applicable security and the counterparty’s fractional interest in that security, and segregates the security from general assets in accordance with regulations governing custodial holdings of securities. The primary risk with repurchase agreements is market risk associated with the investments securing the transactions, as additional collateral may be required based on fair value changes of the underlying investments. Securities pledged as collateral under repurchase agreements are maintained with safekeeping agents. The carrying value of available for sale investment securities pledged as collateral under repurchase agreements was $535.6 million and $684.2 million at March 31, 2018 and December 31, 2017, respectively.

The remaining contractual maturity of the securities sold under agreements to repurchase by class of collateral pledged included in borrowings on the Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017 is presented in the following tables.

	March 31, 2018
	Remaining Contractual Maturity of the Agreements
(Dollars in thousands)	Overnight and continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
U.S. Treasury	$	522,207	$	—	$	—	$	—	$	522,207
Gross amount of recognized liabilities for repurchase agreements									$	522,207
	December 31, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
U.S. Treasury	$	556,171	$	—	$	30,000	$	—	$	586,171
Gross amount of recognized liabilities for repurchase agreements									$	586,171

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Estimated Fair Values

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Estimated Fair Values

ESTIMATED FAIR VALUES

Fair value estimates are intended to represent the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. Where there is no active market for a financial instrument, BancShares has made estimates using discounted cash flows or other valuation techniques. Inputs used in these valuation techniques are subjective in nature, involve uncertainties and require significant judgment and therefore can only be derived within a range of precision. Accordingly, the derived fair value estimates presented below are not necessarily indicative of the amounts BancShares would realize in a current market exchange.

ASC 820, Fair Value Measurements and Disclosures, indicates that assets and liabilities are recorded at fair value according to a fair value hierarchy comprised of three levels. The levels are based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The level within the fair value hierarchy for an asset or liability is based on the highest level of input that is significant to the fair value measurement (with Level 1 considered highest and Level 3 considered lowest). A brief description of each level follows:

• Level 1 values are based on quoted prices for identical instruments in active markets.

• Level 2 values are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market.

• Level 3 values are derived from valuation techniques in which one or more significant inputs or assumptions are not observable in the market. These unobservable inputs and assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation techniques include the use of discounted cash flow models and similar techniques.

BancShares' management reviews any changes to its valuation methodologies to ensure they are appropriate and justified, and refines valuation methodologies as more market-based data becomes available. Transfers between levels of the fair value hierarchy are recognized at the end of the reporting period. There have been no changes during the three months ended March 31, 2018 and March 31, 2017.

The methodologies used to estimate the fair value of financial assets and financial liabilities are discussed below:

Investment securities available for sale. Investment securities available for sale are carried at fair value. U.S. Treasury, government agency and mortgage-backed securities are generally measured at fair value using a third party pricing service. The third party provider evaluates securities based on market data and utilizes pricing models that use a variety of inputs, such as benchmark yields, reported trades, broker-dealer quotes, issuer spreads, benchmark securities, bids and offers. These securities are generally classified as Level 2. Corporate bonds and trust preferred securities are generally measured at fair value based on indicative bids from broker-dealers and are not directly observable. These securities are considered Level 3.

Marketable equity securities. Equity securities are measured at fair value using observable closing prices and the valuation also considers the amount of market activity by examining the trade volume of each security. Equity securities are classified as Level 1 if they are traded on a heavily active market and as Level 2 if the observable closing price is from a less than active market.

Loans held for sale. Certain residential real estate loans are originated to be sold to investors are carried at fair value based on quoted market prices for similar types of loans. Accordingly, the inputs used to calculate fair value of originated residential real estate loans held for sale are classified as Level 2 inputs. Portfolio loans that are subsequently transferred to held for sale to be sold in the secondary market are carried at the lower of amortized cost or fair value. The fair value of the transferred portfolio loans is based on the quoted prices and is considered a Level 1 input.

Net loans and leases (PCI and Non-PCI). Fair value is estimated based on discounted future cash flows using the current interest rates at which loans with similar terms would be made to borrowers of similar credit quality. The inputs used in the fair value measurements for loans and leases are considered Level 3 inputs.

FHLB stock. The carrying amount of FHLB stock is a reasonable estimate of fair value as these securities are not readily marketable and are evaluated for impairment based on the ultimate recoverability of the par value. BancShares considers positive and negative evidence, including the profitability and asset quality of the issuer, dividend payment history and recent redemption experience, when determining the ultimate recoverability of the par value. BancShares believes its investment in FHLB stock is ultimately recoverable at par. The inputs used in the fair value measurement for the FHLB stock are considered Level 2 inputs.

Mortgage servicing rights. Mortgage servicing rights are carried at the lower of amortized cost or market and are, therefore, carried at fair value only when fair value is less than the asset cost. The fair value of mortgage servicing rights is performed using a pooling methodology. Similar loans are pooled together and a model that relies on discount rates, estimates of prepayment rates and the weighted average cost to service the loans is used to determine the fair value. The inputs used in the fair value measurement for mortgage servicing rights are considered Level 3 inputs.

Deposits. For non-time deposits, carrying value is a reasonable estimate of fair value. The fair value of time deposits is estimated by discounting future cash flows using the interest rates currently offered for deposits of similar remaining maturities. The inputs used in the fair value measurement for deposits are considered Level 2 inputs.    

Long-term obligations. For fixed rate trust preferred securities, the fair values are determined based on recent trades of the actual security if available. For other long-term obligations, fair values are estimated by discounting future cash flows using current interest rates for similar financial instruments. The inputs used in the fair value measurement for long-term obligations are considered Level 2 inputs.

Payable to the FDIC for shared-loss agreements. The fair value of the payable to the FDIC for shared-loss agreements is determined by the projected cash flows based on expected payments to the FDIC in accordance with the shared-loss agreements. Cash flows are discounted using current discount rates to reflect the timing of the estimated amounts due to the FDIC. The inputs used in the fair value measurement for the payable to the FDIC are considered Level 3 inputs.

Off-balance-sheet commitments and contingencies. Carrying amounts are reasonable estimates of the fair values for such financial instruments. Carrying amounts include unamortized fee income and, in some cases, reserves for any credit losses from those financial instruments. These amounts are not material to BancShares' financial position.

For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of March 31, 2018 and December 31, 2017. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk that would cause the fair value to differ from the carrying value. Cash and due from banks is classified on the fair value hierarchy as Level 1. Overnight investments, income earned not collected, short-term borrowings and accrued interest payable are considered Level 2. Lastly, the receivable from the FDIC for shared-loss agreements is designated as Level 3.

(Dollars in thousands)	March 31, 2018				December 31, 2017
	Carrying value		Fair value		Carrying value		Fair value
Cash and due from banks	$	248,139	$	248,139	$	336,150	$	336,150
Overnight investments	1,946,882		1,946,882		1,387,927		1,387,927
Investment securities available for sale	6,857,740		6,857,740		7,180,180		7,180,180
Investment securities held to maturity	74		79		76		81
Marketable equity securities	110,107		110,107		—		—
Loans held for sale	46,660		46,660		51,179		51,179
Net loans and leases	23,388,861		22,672,287		23,374,932		22,257,803
Receivable from the FDIC for shared-loss agreements	3,636		3,636		2,223		2,223
Income earned not collected	96,607		96,607		95,249		95,249
Federal Home Loan Bank stock	20,810		20,810		52,685		52,685
Mortgage servicing rights	21,659		27,512		21,945		26,170
Deposits	29,969,245		29,924,950		29,266,275		29,230,768
Short-term borrowings	554,758		554,758		693,807		693,807
Long-term obligations	194,413		203,061		870,240		852,112
Payable to the FDIC for shared-loss agreements	102,466		103,440		101,342		102,684
Accrued interest payable	1,498		1,498		3,952		3,952

Among BancShares' assets and liabilities, investment securities available for sale, marketable equity securities and loans held for sale are reported at their fair values on a recurring basis. For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of March 31, 2018 and December 31, 2017.

	March 31, 2018
			Fair value measurements using:
(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	1,553,893	$	—	$	1,553,893	$	—
Government agency	31,909		—		31,909		—
Mortgage-backed securities	5,206,667		—		5,206,667		—
Corporate bonds	59,653		—		—		59,653
Other	5,618		—		—		5,618
Total investment securities available for sale	$	6,857,740	$	—	$	6,792,469	$	65,271
Marketable equity securities	$	110,107	$	21,749	$	88,358	$	—
Loans held for sale	$	46,660	$	—	$	46,660	$	—
	December 31, 2017
			Fair value measurements using:
	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	1,657,864	$	—	$	1,657,864	$	—
Government agency	8,670		—		8,670		—
Mortgage-backed securities	5,340,756		—		5,340,756		—
Equity securities	105,208		19,341		85,867		—
Corporate bonds	59,963		—		59,963		—
Other	7,719		—		7,719		—
Total investment securities available for sale	$	7,180,180	$	19,341	$	7,160,839	$	—
Loans held for sale	$	51,179	$	—	$	51,179	$	—

For the three months ended March 31, 2018, there were transfers from Level 2 to Level 3 of $59.7 million and $5.6 million for corporate bonds and other investment securities available for sale, respectively. The transfers were due to a lack of observable inputs and trade activity for those securities. There were no transfers between levels for the three months ended March 31, 2017.

The following table presents quantitative information about Level 3 fair value measurements for fair value on a recurring basis at March 31, 2018 and December 31, 2017.

(Dollars in thousands)			March 31, 2018
Level 3 assets	Valuation technique	Significant unobservable input	Fair Value
Corporate bonds	Indicative bid provided by broker	Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company	$	59,653
Other	Indicative bid provided by broker	Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company	5,618

Fair Value Option

BancShares has elected the fair value option for residential real estate loans originated to be sold. This election reduces certain timing differences in the Consolidated Statement of Income and better aligns with the management of the portfolio from a business perspective. The changes in fair value are recorded as a component of mortgage income and were a loss of $455 thousand and a gain of $3.2 million for the three months ended March 31, 2018 and March 31, 2017, respectively.

The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for residential real estate originated for sale measured at fair value as of March 31, 2018 and December 31, 2017.

	March 31, 2018
(Dollars in thousands)	Fair Value		Aggregate Unpaid Principal Balance		Difference
Originated loans held for sale	$	46,660	$	45,732	$	928
	December 31, 2017
	Fair Value		Aggregate Unpaid Principal Balance		Difference
Originated loans held for sale	$	51,179	$	49,796	$	1,383

No originated loans held for sale were 90 or more days past due or on nonaccrual status as of March 31, 2018 or December 31, 2017.

Certain other assets are adjusted to their fair value on a nonrecurring basis, including impaired loans, OREO, and goodwill, which are periodically tested for impairment, and mortgage servicing rights, which are carried at the lower of amortized cost or market. Non-impaired loans held for investment, deposits, short-term borrowings and long-term obligations are not reported at fair value.

Impaired loans are deemed to be at fair value if an associated allowance or current period charge-off has been recorded. The value of impaired loans is determined by either collateral valuations or discounted present value of the expected cash flow calculations. Collateral values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 6 and 11 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Expected cash flows are determined using expected payment information at the individual loan level, discounted using the effective interest rate. The effective interest rate generally ranges between 2 and 18 percent.

OREO that has been acquired or written down in the current year is deemed to be at fair value, which uses asset valuations. Asset values are determined using appraisals or other third-party value estimates of the subject property with discounts generally between 6 and 11 percent applied for estimated holding and selling costs and other external factors that may impact the marketability of the property. Changes to the value of the assets between scheduled valuation dates are monitored through continued communication with brokers and monthly reviews by the asset manager assigned to each asset. If there are any significant changes in the market or the subject property, valuations are adjusted or new appraisals ordered to ensure the reported values reflect the most current information.

Mortgage servicing rights are carried at the lower of cost or market and are, therefore, carried at fair value only when fair value is less than the amortized asset cost. The fair value of mortgage servicing rights is performed using a pooling methodology. Similar loans are pooled together and a discounted cash flow model, which takes into consideration discount rates, prepayment rates, and the weighted average cost to service the loans, is used to determine the fair value.

For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of March 31, 2018 and December 31, 2017.

	March 31, 2018
			Fair value measurements using:
(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Impaired loans	$	73,892	$	—	$	—	$	73,892
Other real estate remeasured during current year	11,695		—		—		11,695
	December 31, 2017
			Fair value measurements using:
	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Impaired loans	$	72,539	$	—	$	—	$	72,539
Other real estate remeasured during current year	40,167		—		—		40,167

No financial liabilities were carried at fair value on a nonrecurring basis as of March 31, 2018 and December 31, 2017.

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Employee Benefit Plans

3 Months Ended

Mar. 31, 2018

Retirement Benefits, Description [Abstract]

Employee Benefit Plans

EMPLOYEE BENEFIT PLANS

BancShares sponsors noncontributory defined benefit pension plans for its qualifying employees (BancShares Plan) and former First Citizens Bancorporation, Inc. employees (Bancorporation Plan). The service cost component of net periodic benefit cost is included in salaries and wages while all other non-service cost components are included in other noninterest expense.

BancShares Plan

For the three months ended March 31, 2018 and 2017, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Service cost	$	3,429		$	3,376
Interest cost	7,057			7,380
Expected return on assets	(11,957		)	(10,698		)
Amortization of prior service cost	20			52
Amortization of net actuarial loss	3,246			2,234
Net periodic benefit cost	$	1,795		$	2,344

Bancorporation Plan

For the three months ended March 31, 2018 and 2017, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Service cost	$	662		$	671
Interest cost	1,587			1,683
Expected return on assets	(3,106		)	(2,796		)
Amortization of net actuarial loss	71			214
Net periodic benefit cost	$	(786	)	$	(228	)

No contributions were made during the three months ended March 31, 2018 to the BancShares or Bancorporation pension plans. Management evaluates the need for its pension plan contributions on a periodic basis based upon numerous factors including, but not limited to, the funded status of and returns to the BancShares Plan and Bancorporation Plan, discount rates and the current economic environment.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments include commitments to extend credit, standby letters of credit and recourse obligations on mortgage loans sold. These instruments involve elements of credit, interest rate or liquidity risk.

Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires that collateral be pledged to secure the commitment, including cash deposits, securities and other assets.

Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those commitments are primarily issued to support public and private borrowing arrangements, and the fair value of those commitments is not material. To mitigate its risk, BancShares’ credit policies govern the issuance of standby letters of credit. The credit risk related to the issuance of these letters of credit is essentially the same as that involved in extending loans to clients and, therefore, these letters of credit are collateralized when necessary.

The following table presents the commitments to extend credit and unfunded commitments as of March 31, 2018 and December 31, 2017:

(Dollars in thousands)	March 31, 2018		December 31, 2017
Unused commitments to extend credit	$	9,994,802	$	9,629,365
Standby letters of credit	81,059		81,530
Unfunded commitments for investments in affordable housing projects	63,803		61,819

Affordable housing project investments were $134.4 million and $128.0 million as of March 31, 2018 and December 31, 2017, respectively, and are included in other assets on the Consolidated Balance Sheets.

Pursuant to standard representations and warranties relating to residential mortgage loan sales sold on a non-recourse basis, contingent obligations exist for various events that may occur following the loan sale. If underwriting or documentation deficiencies are discovered at any point in the life of the loan or if the loan fails to perform per the terms of the loan purchase agreement, typically within 180 days from the date of sale, the investor may require BancShares to repurchase the loan or to repay a portion of the sale proceeds. Other liabilities included reserves of $867 thousand and $882 thousand as of March 31, 2018 and December 31, 2017, respectively, for estimated losses arising from these standard representation and warranty provisions.

BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts are claimed. BancShares is also exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various merger transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements.

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Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Loss

ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME

Accumulated other comprehensive loss included the following as of March 31, 2018 and December 31, 2017:

	March 31, 2018									December 31, 2017
(Dollars in thousands)	Accumulated other comprehensive loss			Deferred tax benefit			Accumulated other comprehensive loss, net of tax			Accumulated other comprehensive loss			Deferred tax benefit			Accumulated other comprehensive loss, net of tax
Unrealized losses on securities available for sale	$	(157,460	)	$	(36,217	)	$	(121,243	)	$	(48,834	)	$	(17,889	)	$	(30,945	)
Funded status of defined benefit plans	(141,662		)	(32,582		)	(109,080		)	(144,999		)	(53,650		)	(91,349		)
Total	$	(299,122	)	$	(68,799	)	$	(230,323	)	$	(193,833	)	$	(71,539	)	$	(122,294	)

The following table highlights changes in accumulated other comprehensive (loss) income by component for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018
(Dollars in thousands)	Unrealized (losses) gains on securities available for sale1			Defined benefit pension items1			Total
Beginning balance	$	(30,945	)	$	(91,349	)	$	(122,294	)
Cumulative effect adjustments	(29,752		)	(20,300		)	(50,052		)
Other comprehensive loss before reclassifications	(60,546		)	—			(60,546		)
Amounts reclassified from accumulated other comprehensive (loss) income	—			2,569			2,569
Net current period other comprehensive (loss) income	(60,546		)	2,569			(57,977		)
Ending balance	$	(121,243	)	$	(109,080	)	$	(230,323	)
	Three months ended March 31, 2017
	Unrealized (losses) gains on securities available for sale1			Defined benefit pension items1			Total
Beginning balance	$	(45,875	)	$	(89,317	)	$	(135,192	)
Other comprehensive income before reclassifications	22,677			—			22,677
Amounts reclassified from accumulated other comprehensive (loss) income	15			1,559			1,574
Net current period other comprehensive income	22,692			1,559			24,251
Ending balance	$	(23,183	)	$	(87,758	)	$	(110,941	)

¹ All amounts are net of tax. Amounts in parentheses indicate debits.

The following table presents the amounts reclassified from accumulated other comprehensive (loss) income and the line item affected in the statement where net income is presented for the three months ended March 31, 2018 and March 31, 2017:

(Dollars in thousands)	Three months ended March 31, 2018
Details about accumulated other comprehensive income (loss)	Amounts reclassified from accumulated other comprehensive income (loss)1			Affected line item in the statement where net income is presented
Amortization of defined benefit pension items
Prior service costs	$	(20	)	Salaries and wages
Actuarial losses	(3,317		)	Other
	(3,337		)	Income before income taxes
	768			Income taxes
	$	(2,569	)	Net income
Total reclassifications for the period	$	(2,569	)
	Three months ended March 31, 2017
Details about accumulated other comprehensive income (loss)	Amounts reclassified from accumulated other comprehensive income (loss)1			Affected line item in the statement where net income is presented
Unrealized gains and losses on securities available for sale	$	(24	)	Securities losses, net
	9			Income taxes
	$	(15	)	Net income
Amortization of defined benefit pension items
Prior service costs	$	(52	)	Salaries and wages
Actuarial losses	(2,448		)	Other
	(2,500		)	Income before income taxes
	941			Income taxes
	$	(1,559	)	Net income
Total reclassifications for the period	$	(1,574	)

¹ Amounts in parentheses indicate debits to profit/loss.

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Accounting Policies and Basis of Presentation Policies (Policies)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Reclassifications

Reclassifications

In certain instances, amounts reported in prior years' consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders' equity or net income.

Use of Estimates

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported. Actual results could differ from those estimates, and different assumptions in the application of these policies could result in material changes in BancShares' consolidated financial position, the consolidated results of its operations or related disclosures. Material estimates that are particularly susceptible to significant change include:

• Allowance for loan and lease losses;

• Fair value of financial instruments, including acquired assets and assumed liabilities;

• Pension plan assumptions;

• Cash flow estimates on purchased credit-impaired loans;

• Goodwill and other intangible assets;

• Federal Deposit Insurance Corporation (FDIC) shared-loss payable; and

• Income tax assets, liabilities and expense

New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

FASB ASU 2018-03, Technical Corrections and Improvements to Financial Instruments - Overall (Subtopic 825-10)

The amendments in this ASU provide clarification on certain aspects related to the guidance issued in ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. The areas for correction or improvement include (1) equity securities without a readily determinable fair value - discontinuation; (2) equity securities without a readily determinable fair value - adjustments; (3) forward contracts and purchased options; (4) presentation requirements for certain fair value option liabilities; (5) fair value option liabilities denominated in a foreign currency; and (6) transition guidance for equity securities without a readily determinable fair value.

This ASU is effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years beginning after June 15, 2018. Early adoption is permitted. We adopted the guidance effective in the first quarter of 2018. The adoption did not have a material impact on our consolidated financial position or consolidated results of operations.

FASB ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

This ASU requires a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from the newly enacted federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017 (Tax Act), which was enacted on December 22, 2017. The Tax Act included a reduction to the corporate income tax rate from 35 percent to 21 percent effective January 1, 2018. The amount of the reclassification would be the difference between the historical corporate income tax rate and the newly enacted 21 percent corporate income tax rate.

The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We adopted the guidance effective in the first quarter of 2018. The change in accounting principle was accounted for as a cumulative-effect adjustment to the balance sheet resulting in a $31.3 million increase to retained earnings and a corresponding decrease to AOCI on January 1, 2018.

FASB ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

This ASU requires employers to present the service cost component of the net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. Employers will present the other components separately from the line item that includes the service cost. In addition, only the service cost component of net benefit cost is eligible for capitalization.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted the guidance effective in the first quarter of 2018. The adoption did not have a material impact on our consolidated financial position or consolidated results of operations.

FASB ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments

This ASU addresses the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments in this ASU provide guidance on (1) debt prepayment or debt extinguishment costs; (2) settlement of zero-coupon debt instruments; (3) contingent consideration payments made after a business combination; (4) proceeds from the settlement of insurance claims; (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; (6) distributions received from equity method investees; (7) beneficial interests in securitization transactions; and (8) separately identifiable cash flows and application of the predominance principle.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The guidance requires application using a retrospective transition method. We adopted the guidance effective in the first quarter of 2018. The adoption did not have any impact on our Consolidated Statements of Cash Flows.

FASB ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities

This ASU addresses certain aspects of recognition, measurement, presentation and disclosure of certain financial instruments. The amendments in this ASU (1) require most equity investments to be measured at fair value with changes in fair value recognized in net income; (2) simplify the impairment assessment of equity investments without a readily determinable fair value; (3) eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value for financial instruments measured at amortized cost on the balance sheet; (4) require public business entities to use exit price notion, rather than entry prices, when measuring fair value of financial instruments for disclosure purposes; (5) require separate presentation of financial assets and financial liabilities by measurement category and form of financial assets on the balance sheet or the accompanying notes to the financial statements; (6) require separate presentation in other comprehensive income of 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 organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; and (7) state that a valuation allowance on deferred tax assets related to available-for-sale securities should be evaluated in combination with other deferred tax assets.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We adopted the guidance effective in the first quarter of 2018. The change in accounting principle was accounted for as a cumulative-effect adjustment to the balance sheet resulting in an $18.7 million increase to retained earnings and a decrease to AOCI on January 1, 2018. With the adoption of this ASU equity securities can no longer be classified as available for sale, as such marketable equity securities will be disclosed as a separate line item on the balance sheet with changes in the fair value of equity securities reflected in net income.

For equity investments without a readily determinable fair value, BancShares has elected to measure the equity investments using the measurement alternative which requires BancShares to make a qualitative assessment of whether the investment is impaired at each reporting period. Under the measurement alternative these investments will be measured at cost, less any impairment, plus or minus changes resulting from observable price changes in orderly transactions for an identical or similar investment of the same issuer. If a qualitative assessment indicates that the investment is impaired, BancShares will estimate the investment's fair value in accordance with ASC 820 and, if the fair value is less than the investment's carrying value, recognize an impairment loss in net income equal to the difference between carrying value and fair value. Equity investments without a readily determinable fair value are recorded within other assets in the consolidated balance sheets.

FASB ASU 2014-09, Revenue from Contracts with Customers (Topic 606)

In May 2014, the FASB issued a standard on the recognition of revenue from contracts with customers with the core principle being for a company to recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the consideration to which the company expects to be entitled in exchange for those goods or services. The new standard, which provides a five step model to determine when and how revenue is recognized, also results in enhanced disclosures about revenue, provides guidance for transactions that were not previously addressed comprehensively and improves guidance for multiple-element arrangements.

Per ASU 2015-14, Deferral of the Effective Date, this guidance was deferred and is effective for fiscal periods beginning after December 15, 2017, including interim reporting periods within that reporting period. We adopted the guidance effective in the first quarter of 2018. Our revenue is comprised primarily of net interest income on financial assets and liabilities, which is explicitly excluded from the scope of the new guidance, and noninterest income. The contracts that are in scope of the guidance are primarily related to cardholder and merchant services income, service charges on deposit accounts, wealth management services income, other service charges and fees, insurance commissions, ATM income, sales of other real estate and other. Based on our overall assessment of revenue streams and review of related contracts affected by the ASU, the adoption of this guidance did not change the method in which we currently recognize revenue.

We also completed an evaluation of the costs related to these revenue streams to determine whether such costs should be presented as expenses or contra-revenue (i.e., gross vs. net). Based on this evaluation, we determined that the classification of cardholder and merchant processing costs as well as expenses for cardholder reward programs should be netted against cardholder and merchant services income. We used the full retrospective method of adoption and restated the prior financial statements to net the cardholder and merchant processing costs against the related cardholder and merchant services income. These classification changes resulted in changes to both noninterest income and noninterest expense, however, there was no change to previously reported net income. Merchant processing expenses of $18.3 million have been reclassified and reported as a component of merchant services income for the three months ended March 31, 2017. Cardholder processing expenses of $6.8 million and cardholder reward programs expense of $2.5 million have been reclassified and reported as a component of cardholder services income for the three months ended March 31, 2017.

Recently Issued Accounting Pronouncements

FASB ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment

This ASU eliminates Step 2 from the goodwill impairment test. 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 ASU, 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. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative test.

This ASU will be effective for BancShares' annual or interim goodwill impairment tests for fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We expect to adopt the guidance for our annual impairment test in fiscal year 2020. BancShares does not anticipate any impact to our consolidated financial position or consolidated results of operations as a result of the adoption.

FASB ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

This ASU eliminates the delayed recognition of the full amount of credit losses until the loss was probable of occurring and instead will reflect an entity's current estimate of all expected credit losses. The amendments in this ASU broaden the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually. The ASU does not specify a method for measuring expected credit losses and allows an entity to apply methods that reasonably reflect its expectations of the credit loss estimate based on the entity's size, complexity and risk profile. In addition, the disclosures of credit quality indicators in relation to the amortized cost of financing receivables, a current disclosure requirement, are further disaggregated by year of origination.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018. We will adopt the guidance by the first quarter of 2020 with a cumulative-effect adjustment to retained earnings as of the beginning of the year of adoption. For BancShares, the standard will apply to loans, unfunded loan commitments and debt securities. We have formed a cross-functional team co-led by Corporate Finance and Risk Management with executive sponsorship and engaged a third party to assist with the adoption. The implementation team has developed a detailed project plan and is staying informed about the broader industry's perspective and insights, and identifying and researching key decision points. We have completed the readiness assessment and gap analysis related to data, modeling IT, accounting policy, controls and reporting which has enabled us to determine the areas of focus and estimate total body of work. Our current critical activities include model design, accounting policy development, data feasibility analysis, evaluation of reporting and disclosure solutions and completion of specific work stream project plans. We will continue to evaluate the impact the new standard will have on our consolidated financial statements as the final impact will be dependent, among other items, upon the loan portfolio composition and credit quality at the adoption date, as well as economic conditions, financial models used and forecasts at that time.

FASB ASU 2016-02, Leases (Topic 842)

This ASU increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The key difference between existing standards and this ASU is the requirement for lessees to recognize all lease contracts on their balance sheet. This ASU requires lessees to classify leases as either operating or finance leases, which are substantially similar to the current operating and capital leases classifications. The distinction between these two classifications under the new standard does not relate to balance sheet treatment, but relates to treatment in the statements of income and cash flows. Lessor guidance remains largely unchanged with the exception of how a lessor determines the appropriate lease classification for each lease to better align the lessor guidance with revised lessee classification guidance.

The amendments in this ASU are effective for public business entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. We will adopt during the first quarter of 2019. We expect an increase to the Consolidated Balance Sheets for right-of-use assets and associated lease liabilities, as well as resulting depreciation expense of the right-of-use assets and interest expense of the lease liabilities in the Consolidated Statements of Income, for arrangements previously accounted for as operating leases. Additionally, adding these assets to our balance sheet will impact our total risk-weighted assets used to determine our regulatory capital levels. Our impact analysis on this change in accounting principle estimates an increase to the Consolidated Balance Sheets for total lease liability ranging between $65.0 million and $85.0 million, as the initial gross up of both assets and liabilities. Capital is expected to be impacted by an estimated four to six basis points. These are preliminary estimates subject to change and will continue to be refined closer to adoption.

Revenue Recognition

The principles based standard requires disclosure of qualitative and quantitative information surrounding the amount, nature, timing and uncertainty of revenues and cash flows arising from contracts with customers. The core principle of the new standard is that revenue should be recognized when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services.

Descriptions of our noninterest revenue-generating activities that are within the scope of the new revenue ASU is broadly segregated as follows:

Cardholder and Merchant Services - These represent interchange fees from customer debit and credit card transactions that are earned at the time a cardholder engages in a transaction with a merchant as well as fees charged to merchants for providing them the ability to accept and process the debit and credit card transaction. Revenue is recognized when the performance obligation has been met as it is satisfied upon the completion of the card transaction. Additionally, ASU 2014-09 requires us to report costs associated with cardholder and merchant services transactions to be netted against the fees from such transactions.

Service Charges on Deposit Accounts - These deposit account-related fees represent monthly account maintenance and transaction-based service fees such as overdraft fees, stop payment fees and charges for issuing cashier's checks and money orders. For account maintenance services, revenue is recognized at the end of the statement period when our performance obligation has been satisfied. All other revenues from transaction-based services are recognized at a point in time when the performance obligation has been completed.

Wealth Management Services - These primarily represent annuity fees, sales commissions, management fees, insurance sales, and trust and asset management fees. The performance obligation for wealth management services is the provision of services to place annuity products issued by the counterparty to investors, and the provision of services to manage the client’s assets, including brokerage custodial and other management services. Revenue is recognized over the period in which services are performed, are based on a percentage of the value of the assets under management/administration, and are fixed or variable based on account type, or are transaction-based.

Other Service Charges and Fees - These include, but are not limited to, check cashing fees, international banking fees, internet banking fees, wire transfer fees and safe deposit fees. These fees are charged, and revenue is recognized, at the point in time the service being requested by the customer is provided thus satisfying our performance obligation.

Insurance Commissions - These represent commissions earned on the issuance of insurance products and services. The performance obligation is generally satisfied upon the issuance of the insurance policy and revenue is recognized when the commission payment is remitted by the insurance carrier or policy holder depending on if the billing is performed by FCB or the carrier.

ATM Income - These represent fees imposed on customers and non-customers for engaging in an ATM transaction. Revenue is recognized at the time of the transaction as the performance obligation of rendering the ATM service has been met.

Sales of Other Real Estate - ORE property consists of foreclosed real estate used as collateral for loans, closed branches, land acquired and no longer intended for future use by FCB, and other real estate purchased for resale as ORE. Revenue is generally recognized on the date of sale where the performance obligation of providing access and transferring control of the specified ORE property to the buyer in good faith and good title is satisfied. This is recorded as a component of other noninterest income.

Other - This consists of several forms of recurring revenue such as external rental income, parking income, FHLB dividends, and income earned on changes in the cash surrender value of bank-owned life insurance, all of which are outside the scope of ASU 2014-09. The remaining miscellaneous income is the result of immaterial transactions where revenue is recognized when, or as, the performance obligation is satisfied.

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Business Combinations (Tables)

3 Months Ended

Mar. 31, 2018

Business Acquisition [Line Items]

Loans acquired, cash flows expected

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Investments (Tables)

3 Months Ended

Mar. 31, 2018

Gain (Loss) on Investments [Line Items]

Aggregate Values And Unrealized Gains And Losses Of Investment Securities

The amortized cost and fair value of investment securities classified as available for sale and held to maturity at March 31, 2018 and December 31, 2017, are as follows:

	March 31, 2018
(Dollars in thousands)	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities available for sale
U.S. Treasury	$	1,557,991	$	—	$	4,098	$	1,553,893
Government agency	32,006		12		109		31,909
Mortgage-backed securities	5,360,251		1,001		154,585		5,206,667
Corporate bonds	59,414		319		80		59,653
Other	5,538		80		—		5,618
Total investment securities available for sale	$	7,015,200	$	1,412	$	158,872	$	6,857,740
	December 31, 2017
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities available for sale
U.S. Treasury	$	1,658,410	$	—	$	546	$	1,657,864
Government agency	8,695		15		40		8,670
Mortgage-backed securities	5,419,379		1,529		80,152		5,340,756
Equity securities	75,471		29,737		—		105,208
Corporate bonds	59,414		557		8		59,963
Other	7,645		256		182		7,719
Total investment securities available for sale	$	7,229,014	$	32,094	$	80,928	$	7,180,180
	March 31, 2018
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities held to maturity
Mortgage-backed securities	$	74	$	5	$	—	$	79
	December 31, 2017
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities held to maturity
Mortgage-backed securities	$	76	$	5	$	—	$	81

Investment Securities Maturity Information

The following table provides the amortized cost and fair value by contractual maturity. Expected maturities will differ from contractual maturities on certain securities because borrowers and issuers may have the right to call or prepay obligations with or without prepayment penalties. Repayments of mortgage-backed securities are dependent on the repayments of the underlying loan balances.

	March 31, 2018				December 31, 2017
(Dollars in thousands)	Cost		Fair value		Cost		Fair value
Investment securities available for sale
Non-amortizing securities maturing in:
One year or less	$	1,105,460	$	1,103,291	$	808,768	$	808,301
One through five years	453,082		451,152		850,532		850,450
Five through 10 years	60,303		60,546		60,332		60,886
Over 10 years	36,104		36,084		14,532		14,579
Mortgage-backed securities	5,360,251		5,206,667		5,419,379		5,340,756
Equity securities	—		—		75,471		105,208
Total investment securities available for sale	$	7,015,200	$	6,857,740	$	7,229,014	$	7,180,180
Investment securities held to maturity
Mortgage-backed securities held to maturity	$	74	$	79	$	76	$	81

Securities Gains (Losses)

Marketable Securities Gains (Losses)

The following table provides the realized and unrealized gains or losses on marketable equity securities for the three months ended March 31, 2018.

(Dollars in thousands)	Three months ended March 31, 2018
Marketable equity securities gains, net	$	971
Less net gains recognized on marketable equity securities sold	96
Unrealized gains recognized on marketable equity securities held	$	875

Investment Securities With Unrealized Losses

The following table provides information regarding securities available for sale with unrealized losses as of March 31, 2018 and December 31, 2017.

	March 31, 2018
	Less than 12 months				12 months or more				Total
(Dollars in thousands)	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Investment securities available for sale:
U.S. Treasury	$	1,453,968	$	4,049	$	99,925	$	49	$	1,553,893	$	4,098
Government agency	12,059		81		2,159		28		14,218		109
Mortgage-backed securities	2,404,338		58,606		2,535,662		95,979		4,940,000		154,585
Corporate bonds	9,950		80		—		—		9,950		80
Total	$	3,880,315	$	62,816	$	2,637,746	$	96,056	$	6,518,061	$	158,872
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Investment securities available for sale:
U.S. Treasury	$	1,408,166	$	345	$	249,698	$	201	$	1,657,864	$	546
Government agency	848		12		2,527		28		3,375		40
Mortgage-backed securities	2,333,254		20,911		2,723,406		59,241		5,056,660		80,152
Corporate bonds	5,025		8		—		—		5,025		8
Other	5,349		182		—		—		5,349		182
Total	$	3,752,642	$	21,458	$	2,975,631	$	59,470	$	6,728,273	$	80,928

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

INVESTMENTS

The amortized cost and fair value of investment securities classified as available for sale and held to maturity at March 31, 2018 and December 31, 2017, are as follows:

	March 31, 2018
(Dollars in thousands)	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities available for sale
U.S. Treasury	$	1,557,991	$	—	$	4,098	$	1,553,893
Government agency	32,006		12		109		31,909
Mortgage-backed securities	5,360,251		1,001		154,585		5,206,667
Corporate bonds	59,414		319		80		59,653
Other	5,538		80		—		5,618
Total investment securities available for sale	$	7,015,200	$	1,412	$	158,872	$	6,857,740
	December 31, 2017
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities available for sale
U.S. Treasury	$	1,658,410	$	—	$	546	$	1,657,864
Government agency	8,695		15		40		8,670
Mortgage-backed securities	5,419,379		1,529		80,152		5,340,756
Equity securities	75,471		29,737		—		105,208
Corporate bonds	59,414		557		8		59,963
Other	7,645		256		182		7,719
Total investment securities available for sale	$	7,229,014	$	32,094	$	80,928	$	7,180,180
	March 31, 2018
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities held to maturity
Mortgage-backed securities	$	74	$	5	$	—	$	79
	December 31, 2017
	Cost		Gross unrealized gains		Gross unrealized losses		Fair value
Investment securities held to maturity
Mortgage-backed securities	$	76	$	5	$	—	$	81

As a result of adopting ASU 2016-01 in the first quarter of 2018, investments in marketable equity securities are no longer classified as investments available for sale. At March 31, 2018 and December 31, 2017, we had $110.1 million and $105.2 million, respectively, in marketable equity securities recorded at fair value. Prior to January 1, 2018 equity securities were classified as available for sale and stated at fair value with unrealized gains and losses reported in accumulated other comprehensive income. A cumulative-effect adjustment of $18.7 million was recorded on January 1, 2018 to reclassify the net unrealized gains from accumulated other comprehensive income to retained earnings with subsequent changes in fair value recognized in the Consolidated Statements of Income.

Investments in mortgage-backed securities primarily represent securities issued by the Government National Mortgage Association, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation. Investments in corporate bonds and marketable equity securities represent positions in securities of other financial institutions. Other investments include trust preferred securities of financial institutions. The following table provides the amortized cost and fair value by contractual maturity. Expected maturities will differ from contractual maturities on certain securities because borrowers and issuers may have the right to call or prepay obligations with or without prepayment penalties. Repayments of mortgage-backed securities are dependent on the repayments of the underlying loan balances.

	March 31, 2018				December 31, 2017
(Dollars in thousands)	Cost		Fair value		Cost		Fair value
Investment securities available for sale
Non-amortizing securities maturing in:
One year or less	$	1,105,460	$	1,103,291	$	808,768	$	808,301
One through five years	453,082		451,152		850,532		850,450
Five through 10 years	60,303		60,546		60,332		60,886
Over 10 years	36,104		36,084		14,532		14,579
Mortgage-backed securities	5,360,251		5,206,667		5,419,379		5,340,756
Equity securities	—		—		75,471		105,208
Total investment securities available for sale	$	7,015,200	$	6,857,740	$	7,229,014	$	7,180,180
Investment securities held to maturity
Mortgage-backed securities held to maturity	$	74	$	79	$	76	$	81

There were no sales of investment securities available for sale for the three months ended March 31, 2018. Gross gains and gross losses on sales of investment securities available for sale were $3 thousand and $27 thousand, respectively for the three months ended March 31, 2017.

The following table provides the realized and unrealized gains or losses on marketable equity securities for the three months ended March 31, 2018.

(Dollars in thousands)	Three months ended March 31, 2018
Marketable equity securities gains, net	$	971
Less net gains recognized on marketable equity securities sold	96
Unrealized gains recognized on marketable equity securities held	$	875

The following table provides information regarding securities available for sale with unrealized losses as of March 31, 2018 and December 31, 2017.

	March 31, 2018
	Less than 12 months				12 months or more				Total
(Dollars in thousands)	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Investment securities available for sale:
U.S. Treasury	$	1,453,968	$	4,049	$	99,925	$	49	$	1,553,893	$	4,098
Government agency	12,059		81		2,159		28		14,218		109
Mortgage-backed securities	2,404,338		58,606		2,535,662		95,979		4,940,000		154,585
Corporate bonds	9,950		80		—		—		9,950		80
Total	$	3,880,315	$	62,816	$	2,637,746	$	96,056	$	6,518,061	$	158,872
	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Investment securities available for sale:
U.S. Treasury	$	1,408,166	$	345	$	249,698	$	201	$	1,657,864	$	546
Government agency	848		12		2,527		28		3,375		40
Mortgage-backed securities	2,333,254		20,911		2,723,406		59,241		5,056,660		80,152
Corporate bonds	5,025		8		—		—		5,025		8
Other	5,349		182		—		—		5,349		182
Total	$	3,752,642	$	21,458	$	2,975,631	$	59,470	$	6,728,273	$	80,928

Investment securities available for sale with an aggregate fair value of $2.64 billion and $2.98 billion had continuous unrealized losses for more than 12 months with a corresponding aggregate unrealized loss of $96.1 million and $59.5 million as of March 31, 2018 and December 31, 2017, respectively. As of March 31, 2018, 224 of these are government sponsored enterprise-issued mortgage-backed securities or government agency securities and 1 is a U.S. Treasury security.

None of the unrealized losses identified as of March 31, 2018 or December 31, 2017 relate to the marketability of the securities or the issuers' ability to honor redemption obligations. Rather, the unrealized losses relate to changes in interest rates relative to when the debt securities were purchased. For all periods presented, BancShares had the ability and intent to retain these securities for a period of time sufficient to recover all unrealized losses. Therefore, none of the securities were deemed to be other than temporarily impaired.

Debt securities having an aggregate carrying value of $3.83 billion at March 31, 2018 and $4.59 billion at December 31, 2017 were pledged as collateral to secure public funds on deposit and certain short-term borrowings, and for other purposes as required by law.

On May 1, 2018, mortgage-backed securities with an amortized cost of $2.49 billion were transferred from investments available for sale to the held to maturity portfolio. At the time of transfer, the mortgage-backed securities had a fair value of $2.38 billion and a weighted average maturity of 13 years. FCB has the intent and ability to retain these securities until maturity.

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Loans and Leases (Tables)

3 Months Ended

Mar. 31, 2018

Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]

Loans And Leases Outstanding

Loans and leases outstanding included the following at March 31, 2018 and December 31, 2017:

(Dollars in thousands)	March 31, 2018		December 31, 2017
Non-PCI loans and leases:
Commercial:
Construction and land development	$	738,413	$	669,215
Commercial mortgage	9,859,136		9,729,022
Other commercial real estate	386,734		473,433
Commercial and industrial	2,695,205		2,730,407
Lease financing	910,589		894,801
Other	281,485		302,176
Total commercial loans	14,871,562		14,799,054
Noncommercial:
Residential mortgage	3,587,791		3,523,786
Revolving mortgage	2,651,648		2,701,525
Construction and land development	243,114		248,289
Consumer	1,554,025		1,561,173
Total noncommercial loans	8,036,578		8,034,773
Total non-PCI loans and leases	22,908,140		22,833,827
PCI loans:
Commercial:
Construction and land development	9,316		10,135
Commercial mortgage	325,073		358,103
Other commercial real estate	16,179		17,124
Commercial and industrial	3,732		6,374
Other	1,628		1,683
Total commercial loans	355,928		393,419
Noncommercial:
Residential mortgage	282,338		299,318
Revolving mortgage	60,388		63,908
Construction and land development	3,006		4,163
Consumer	2,177		2,190
Total noncommercial loans	347,909		369,579
Total PCI loans	703,837		762,998
Total loans and leases	$	23,611,977	$	23,596,825

Composition Of The Loans And Leases Outstanding By Credit Quality Indicator

Non-PCI loans and leases outstanding at March 31, 2018 and December 31, 2017 by credit quality indicator are provided below:

	March 31, 2018
(Dollars in thousands)	Non-PCI commercial loans and leases
Grade:	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	733,253	$	9,661,079	$	382,679	$	2,476,337	$	900,464	$	278,367	$	14,432,179
Special mention	483		81,680		1,187		37,571		3,347		1,107		125,375
Substandard	4,639		115,039		2,868		19,357		6,734		1,889		150,526
Doubtful	—		1,338		—		836		—		72		2,246
Ungraded	38		—		—		161,104		44		50		161,236
Total	$	738,413	$	9,859,136	$	386,734	$	2,695,205	$	910,589	$	281,485	$	14,871,562
	December 31, 2017
	Non-PCI commercial loans and leases
	Construction  and land development		Commercial mortgage		Other commercial real estate		Commercial  and industrial		Lease financing		Other		Total non-PCI commercial loans and leases
Pass	$	665,197	$	9,521,019	$	468,942	$	2,511,307	$	883,779	$	298,064	$	14,348,308
Special mention	691		78,643		1,260		44,130		4,340		2,919		131,983
Substandard	3,327		128,848		3,224		18,617		6,585		1,193		161,794
Doubtful	—		262		—		385		—		—		647
Ungraded	—		250		7		155,968		97		—		156,322
Total	$	669,215	$	9,729,022	$	473,433	$	2,730,407	$	894,801	$	302,176	$	14,799,054

	March 31, 2018
	Non-PCI noncommercial loans and leases
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	3,542,327	$	2,628,122	$	239,107	$	1,541,749	$	7,951,305
30-59 days past due	23,833		9,364		2,885		6,935		43,017
60-89 days past due	2,429		3,636		—		2,440		8,505
90 days or greater past due	19,202		10,526		1,122		2,901		33,751
Total	$	3,587,791	$	2,651,648	$	243,114	$	1,554,025	$	8,036,578
	December 31, 2017
	Non-PCI noncommercial loans and leases
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total non-PCI noncommercial loans and leases
Current	$	3,465,935	$	2,674,390	$	239,648	$	1,546,473	$	7,926,446
30-59 days past due	27,886		13,428		7,154		8,812		57,280
60-89 days past due	8,064		3,485		108		2,893		14,550
90 days or greater past due	21,901		10,222		1,379		2,995		36,497
Total	$	3,523,786	$	2,701,525	$	248,289	$	1,561,173	$	8,034,773

PCI loans outstanding at March 31, 2018 and December 31, 2017 by credit quality indicator are provided below:

	March 31, 2018
(Dollars in thousands)	PCI commercial loans
Grade:	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	3,691	$	157,187	$	12,739	$	1,642	$	254	$	175,513
Special mention	338		61,443		307		488		928		63,504
Substandard	4,231		101,734		2,615		1,492		446		110,518
Doubtful	1,056		4,709		518		81		—		6,364
Ungraded	—		—		—		29		—		29
Total	$	9,316	$	325,073	$	16,179	$	3,732	$	1,628	$	355,928
	December 31, 2017
	PCI commercial loans
	Construction and land development		Commercial mortgage		Other commercial real estate		Commercial and industrial		Other		Total PCI commercial loans
Pass	$	1,817	$	181,353	$	13,830	$	4,057	$	275	$	201,332
Special mention	320		61,295		323		374		945		63,257
Substandard	5,792		106,807		2,163		1,843		463		117,068
Doubtful	2,206		8,648		808		73		—		11,735
Ungraded	—		—		—		27		—		27
Total	$	10,135	$	358,103	$	17,124	$	6,374	$	1,683	$	393,419

	March 31, 2018
	PCI noncommercial loans
(Dollars in thousands)	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total PCI noncommercial loans
Current	$	249,443	$	53,885	$	2,420	$	2,095	$	307,843
30-59 days past due	9,196		1,662		19		40		10,917
60-89 days past due	1,436		851		—		—		2,287
90 days or greater past due	22,263		3,990		567		42		26,862
Total	$	282,338	$	60,388	$	3,006	$	2,177	$	347,909
	December 31, 2017
	PCI noncommercial loans
	Residential mortgage		Revolving mortgage		Construction and land development		Consumer		Total PCI noncommercial loans
Current	$	257,166	$	55,871	$	3,521	$	2,074	$	318,632
30-59 days past due	10,525		2,767		—		51		13,343
60-89 days past due	4,846		701		642		23		6,212
90 days or greater past due	26,781		4,569		—		42		31,392
Total	$	299,318	$	63,908	$	4,163	$	2,190	$	369,579

Aging Of The Outstanding Loans And Leases By Class Excluding Loans Impaired At Acquisition Date

The aging of the outstanding non-PCI loans and leases, by class, at March 31, 2018 and December 31, 2017 is provided in the table below.

The calculation of days past due begins on the day after payment is due and includes all days through which all required interest or principal has not been paid. Loans and leases 30 days or less past due are considered current as various grace periods allow borrowers to make payments within a stated period after the due date and still remain in compliance with the loan agreement.

	March 31, 2018
(Dollars in thousands)	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	2,011	$	771	$	357	$	3,139	$	735,274	$	738,413
Commercial mortgage	9,813		4,738		7,058		21,609		9,837,527		9,859,136
Other commercial real estate	94		22		73		189		386,545		386,734
Commercial and industrial	8,273		1,844		1,503		11,620		2,683,585		2,695,205
Lease financing	3,677		45		1,512		5,234		905,355		910,589
Residential mortgage	23,833		2,429		19,202		45,464		3,542,327		3,587,791
Revolving mortgage	9,364		3,636		10,526		23,526		2,628,122		2,651,648
Construction and land development - noncommercial	2,885		—		1,122		4,007		239,107		243,114
Consumer	6,935		2,440		2,901		12,276		1,541,749		1,554,025
Other	46		47		129		222		281,263		281,485
Total non-PCI loans and leases	$	66,931	$	15,972	$	44,383	$	127,286	$	22,780,854	$	22,908,140
	December 31, 2017
	30-59 days past due		60-89 days past due		90 days or greater		Total past due		Current		Total loans and leases
Non-PCI loans and leases:
Construction and land development - commercial	$	491	$	442	$	357	$	1,290	$	667,925	$	669,215
Commercial mortgage	12,288		2,375		6,490		21,153		9,707,869		9,729,022
Other commercial real estate	107		—		75		182		473,251		473,433
Commercial and industrial	6,694		1,510		1,266		9,470		2,720,937		2,730,407
Lease financing	2,983		167		973		4,123		890,678		894,801
Residential mortgage	27,886		8,064		21,901		57,851		3,465,935		3,523,786
Revolving mortgage	13,428		3,485		10,222		27,135		2,674,390		2,701,525
Construction and land development - noncommercial	7,154		108		1,379		8,641		239,648		248,289
Consumer	8,812		2,893		2,995		14,700		1,546,473		1,561,173
Other	188		6		133		327		301,849		302,176
Total non-PCI loans and leases	$	80,031	$	19,050	$	45,791	$	144,872	$	22,688,955	$	22,833,827

Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing

The recorded investment, by class, in loans and leases on nonaccrual status, and loans and leases greater than 90 days past due and still accruing at March 31, 2018 and December 31, 2017 for non-PCI loans and leases, were as follows:

	March 31, 2018				December 31, 2017
(Dollars in thousands)	Nonaccrual loans and leases		Loans and leases > 90 days and accruing		Nonaccrual loans and leases		Loans and leases > 90 days and accruing
Non-PCI loans and leases:
Construction and land development - commercial	$	1,059	$	—	$	1,040	$	—
Commercial mortgage	20,505		32		22,625		397
Other commercial real estate	616		—		916		—
Commercial and industrial	2,928		721		2,884		428
Lease financing	1,687		—		1,992		—
Residential mortgage	37,038		—		38,942		—
Revolving mortgage	21,421		—		19,990		—
Construction and land development - noncommercial	1,722		—		1,989		—
Consumer	2,082		2,277		1,992		2,153
Other	202		—		164		—
Total non-PCI loans and leases	$	89,260	$	3,030	$	92,534	$	2,978

Schedule of Contractually Required Payments Including Principal and Interest Expected Cash Flows to be Collected and Fair Values [Table Text Block]

Changes In Carrying Value Of PCI Loans

The following table provides changes in the carrying value of PCI loans during the three months ended March 31, 2018 and March 31, 2017:

(Dollars in thousands)	2018			2017
Balance at January 1	$	762,998		$	809,169
Fair value of acquired loans	—			85,149
Accretion	17,973			19,351
Payments received and other changes, net	(77,134		)	(64,853		)
Balance at March 31	$	703,837		$	848,816
Unpaid principal balance at March 31	$	1,108,379		$	1,155,034

Changes in Carrying Value of Accretable Yield for PCI Loans

The following table documents changes to the amount of accretable yield for the first three months of 2018 and 2017.

(Dollars in thousands)	2018			2017
Balance at January 1	$	316,679		$	335,074
Additions from acquisitions	—			16,653
Accretion	(17,973		)	(19,351		)
Reclassifications (to) from nonaccretable difference	(929		)	11,277
Changes in expected cash flows that do not affect nonaccretable difference	11,568			(2,179		)
Balance at March 31	$	309,345		$	341,474

Changes In Carrying Value of Accretable Yield for PCI Loans

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Allowance for Loan and Lease Losses (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Allowance for Loan and Lease Losses

The following tables provide information on non-PCI impaired loans and leases individually evaluated as of March 31, 2018 and December 31, 2017 including interest income recognized in the period during which the loans and leases were considered impaired.

	March 31, 2018
(Dollars in thousands)	With a recorded allowance		With no recorded allowance		Total		Unpaid principal balance		Related allowance recorded
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	740	$	391	$	1,131	$	1,461	$	171
Commercial mortgage	37,100		33,177		70,277		75,584		3,521
Other commercial real estate	1,086		413		1,499		1,614		306
Commercial and industrial	5,514		2,097		7,611		10,882		621
Lease financing	1,896		270		2,166		3,610		494
Residential mortgage	23,417		17,930		41,347		44,065		2,905
Revolving mortgage	9,998		15,527		25,525		27,948		1,053
Construction and land development - noncommercial	1,294		2,509		3,803		4,620		82
Consumer	1,744		847		2,591		2,872		713
Total non-PCI impaired loans and leases	$	82,789	$	73,161	$	155,950	$	172,656	$	9,866
	December 31, 2017
(Dollars in thousands)	With a recorded allowance		With no recorded allowance		Total		Unpaid principal balance		Related allowance recorded
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	788	$	—	$	788	$	1,110	$	185
Commercial mortgage	39,135		34,520		73,655		78,936		3,648
Other commercial real estate	1,351		506		1,857		2,267		209
Commercial and industrial	6,326		1,648		7,974		10,475		665
Lease financing	1,890		24		1,914		2,571		397
Other	—		521		521		521		—
Residential mortgage	19,135		18,707		37,842		39,946		2,733
Revolving mortgage	5,875		17,895		23,770		25,941		1,085
Construction and land development - noncommercial	592		3,959		4,551		5,224		68
Consumer	2,107		667		2,774		3,043		738
Total non-PCI impaired loans and leases	$	77,199	$	78,447	$	155,646	$	170,034	$	9,728

Non-PCI impaired loans less than $500,000 that are collectively evaluated were $46.9 million and $49.1 million at March 31, 2018 and December 31, 2017, respectively.

The following tables show the average non-PCI impaired loan balance and the interest income recognized by loan class for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018				Three months ended March 31, 2017
(Dollars in thousands)	Average balance		Interest income recognized		Average balance		Interest income recognized
Non-PCI impaired loans and leases:
Construction and land development - commercial	$	1,155	$	11	$	1,055	$	12
Commercial mortgage	72,267		711		75,310		642
Other commercial real estate	1,713		11		1,584		8
Commercial and industrial	7,524		76		11,529		104
Lease financing	2,238		11		1,568		14
Other	—		—		196		2
Residential mortgage	38,724		275		32,963		253
Revolving mortgage	24,792		201		7,969		57
Construction and land development - noncommercial	4,104		48		2,605		33
Consumer	2,508		28		1,900		23
Total non-PCI impaired loans and leases	$	155,025	$	1,372	$	136,679	$	1,148

The following tables present the activity in the ALLL for non-PCI loan and lease losses by loan class for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Lease financing			Other			Residential mortgage			Revolving mortgage			Construction and land development - non- commercial			Consumer			Total
Balance at January 1	$	24,470		$	45,005		$	4,571		$	53,697		$	6,127		$	4,689		$	15,706		$	22,436		$	3,962		$	31,204		$	211,867
Provision	2,225			(1,365		)	(1,293		)	(425		)	987			114			1,512			466			107			2,923			5,251
Charge-offs	—			(46		)	—			(1,475		)	(854		)	(3		)	(806		)	(992		)	(182		)	(5,255		)	(9,613		)
Recoveries	23			239			145			1,219			41			42			77			194			26			1,309			3,315
Balance at March 31	$	26,718		$	43,833		$	3,423		$	53,016		$	6,301		$	4,842		$	16,489		$	22,104		$	3,913		$	30,181		$	210,820
	Three months ended March 31, 2017
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Lease financing			Other			Residential mortgage			Revolving mortgage			Construction and land development - non- commercial			Consumer			Total
Balance at January 1	$	28,877		$	48,278		$	3,269		$	50,225		$	5,907		$	3,127		$	14,447		$	21,013		$	1,596		$	28,287		$	205,026
Provision	2,536			6			304			3,592			575			517			1,351			550			(83		)	1,728			11,076
Charge-offs	(77		)	(37		)	(5		)	(3,253		)	(173		)	(123		)	(250		)	(825		)	—			(3,966		)	(8,709		)
Recoveries	55			364			4			265			6			13			287			552			—			1,080			2,626
Balance at March 31	$	31,391		$	48,611		$	3,572		$	50,829		$	6,315		$	3,534		$	15,835		$	21,290		$	1,513		$	27,129		$	210,019

The following tables show the activity in the allowance for PCI loan losses by loan class for the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31, 2018
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Residential mortgage			Revolving mortgage			Construction and land development - noncommercial			Consumer and other			Total
Balance at January 1	$	142		$	6,564		$	221		$	306		$	2,117		$	259		$	193		$	224		$	10,026
Provision	310			1,608			(46		)	13			264			209			(50		)	46			2,354
Charge-offs	—			(84		)	—			—			—			—			—			—			(84		)
Recoveries	—			—			—			—			—			—			—			—			—
Balance at March 31	$	452		$	8,088		$	175		$	319		$	2,381		$	468		$	143		$	270		$	12,296
	Three months ended March 31, 2017
(Dollars in thousands)	Construction and land development - commercial			Commercial mortgage			Other commercial real estate			Commercial and industrial			Residential mortgage			Revolving mortgage			Construction and land development - noncommercial			Consumer and other			Total
Balance at January 1	$	483		$	6,423		$	502		$	504		$	4,818		$	956		$	—		$	83		$	13,769
Provision	(186		)	(1,230		)	(158		)	(142		)	(545		)	(550		)	—			(34		)	(2,845		)
Charge-offs	—			—			—			—			—			—			—			—			—
Recoveries	—			—			—			—			—			—			—			—			—
Balance at March 31	$	297		$	5,193		$	344		$	362		$	4,273		$	406		$	—		$	49		$	10,924

Allocation of Allowance for Loan and Lease Losses

The following tables show the ending balances of PCI loans and related allowance by class of loans as of March 31, 2018 and December 31, 2017:

	March 31, 2018
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Residential mortgage		Revolving mortgage		Construction and land development - noncommercial		Consumer and other		Total
ALLL for loans acquired with deteriorated credit quality	$	452	$	8,088	$	175	$	319	$	2,381	$	468	$	143	$	270	$	12,296
Loans acquired with deteriorated credit quality	9,316		325,073		16,179		3,732		282,338		60,388		3,006		3,805		703,837
	December 31, 2017
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Residential mortgage		Revolving mortgage		Construction and land development - noncommercial		Consumer and other		Total
ALLL for loans acquired with deteriorated credit quality	$	142	$	6,564	$	221	$	306	$	2,117	$	259	$	193	$	224	$	10,026
Loans acquired with deteriorated credit quality	10,135		358,103		17,124		6,374		299,318		63,908		4,163		3,873		762,998

The following tables present the allowance for non-PCI loan and lease losses and the recorded investment in loans, by loan class, based on impairment method as of March 31, 2018 and December 31, 2017:

	March 31, 2018
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Lease financing		Other		Residential mortgage		Revolving mortgage		Construction and land development - non-commercial		Consumer		Total
Allowance for loan and lease losses:
ALLL for loans and leases individually evaluated for impairment	$	171	$	3,521	$	306	$	621	$	494	$	—	$	2,905	$	1,053	$	82	$	713	$	9,866
ALLL for loans and leases collectively evaluated for impairment	26,547		40,312		3,117		52,395		5,807		4,842		13,584		21,051		3,831		29,468		200,954
Total allowance for loan and lease losses	$	26,718	$	43,833	$	3,423	$	53,016	$	6,301	$	4,842	$	16,489	$	22,104	$	3,913	$	30,181	$	210,820
Loans and leases:
Loans and leases individually evaluated for impairment	$	1,131	$	70,277	$	1,499	$	7,611	$	2,166	$	—	$	41,347	$	25,525	$	3,803	$	2,591	$	155,950
Loans and leases collectively evaluated for impairment	737,282		9,788,859		385,235		2,687,594		908,423		281,485		3,546,444		2,626,123		239,311		1,551,434		22,752,190
Total loan and leases	$	738,413	$	9,859,136	$	386,734	$	2,695,205	$	910,589	$	281,485	$	3,587,791	$	2,651,648	$	243,114	$	1,554,025	$	22,908,140
	December 31, 2017
(Dollars in thousands)	Construction and land development - commercial		Commercial mortgage		Other commercial real estate		Commercial and industrial		Lease financing		Other		Residential mortgage		Revolving mortgage		Construction and land development - non-commercial		Consumer		Total
Allowance for loan and lease losses:
ALLL for loans and leases individually evaluated for impairment	$	185	$	3,648	$	209	$	665	$	397	$	—	$	2,733	$	1,085	$	68	$	738	$	9,728
ALLL for loans and leases collectively evaluated for impairment	24,285		41,357		4,362		53,032		5,730		4,689		12,973		21,351		3,894		30,466		202,139
Total allowance for loan and lease losses	$	24,470	$	45,005	$	4,571	$	53,697	$	6,127	$	4,689	$	15,706	$	22,436	$	3,962	$	31,204	$	211,867
Loans and leases:
Loans and leases individually evaluated for impairment	$	788	$	73,655	$	1,857	$	7,974	$	1,914	$	521	$	37,842	$	23,770	$	4,551	$	2,774	$	155,646
Loans and leases collectively evaluated for impairment	668,427		9,655,367		471,576		2,722,433		892,887		301,655		3,485,944		2,677,755		243,738		1,558,399		22,678,181
Total loan and leases	$	669,215	$	9,729,022	$	473,433	$	2,730,407	$	894,801	$	302,176	$	3,523,786	$	2,701,525	$	248,289	$	1,561,173	$	22,833,827

Troubled Debt Restructurings on Financing Receivables

The following table provides the types of non-PCI TDRs made during the three months ended March 31, 2018 and March 31, 2017, as well as a summary of loans that were modified as a TDR during the twelve month periods ended March 31, 2018 and March 31, 2017 that subsequently defaulted during the three months ended March 31, 2018 and March 31, 2017. BancShares defines payment default as movement of the TDR to nonaccrual status, which is generally 90 days past due for TDRs, foreclosure or charge-off, whichever occurs first.

	Three months ended March 31, 2018						Three months ended March 31, 2017
	All restructurings			Restructurings with payment default			All restructurings			Restructurings with payment default
(Dollars in thousands)	Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end		Number of Loans	Recorded investment at period end
Non-PCI loans and leases
Loan term extension
Commercial mortgage	1	$	305	1	$	305	—	$	—	—	$	—
Other commercial real estate	—	—		—	—		—	—		1	530
Commercial and industrial	3	549		—	—		2	94		—	—
Residential mortgage	—	—		—	—		1	32		1	47
Revolving mortgage	1	57		—	—		—	—		—	—
Consumer	1	21		—	—		2	14		—	—
Total loan term extension	6	932		1	305		5	140		2	577
Below market interest rate
Construction and land development - commercial	—	—		—	—		1	60		—	—
Commercial mortgage	6	1,380		2	47		10	2,512		1	92
Other commercial real estate	—	—		—	—		1	4		—	—
Commercial and industrial	8	361		4	11		3	108		1	—
Lease financing	—	—		—	—		3	839		2	769
Residential mortgage	22	2,189		10	1,277		30	1,543		15	824
Revolving mortgage	25	1,659		11	431		—	—		—	—
Construction and land development - noncommercial	—	—		—	—		2	412		—	—
Consumer	5	71		3	48		2	14		—	—
Other	—	—		—	—		1	143		—	—
Total below market interest rate	66	5,660		30	1,814		53	5,635		19	1,685
Discharged from bankruptcy
Commercial mortgage	1	140		2	502		—	—		1	190
Commercial and industrial	14	474		16	177		—	—		—	—
Lease financing	5	304		2	73		16	227		—	—
Residential mortgage	8	566		6	417		3	140		1	978
Revolving mortgage	5	440		4	193		4	99		9	649
Consumer	13	262		11	183		18	193		10	128
Total discharged from bankruptcy	46	2,186		41	1,545		41	659		21	1,945
Total non-PCI restructurings	118	$	8,778	72	$	3,664	99	$	6,434	42	$	4,207

The following table provides the types of PCI TDRs made during the three months ended March 31, 2018 and March 31, 2017, as well as a summary of loans that were modified as a TDR during the twelve month periods ended March 31, 2018 and March 31, 2017 that subsequently defaulted during the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31, 2018						Three months ended March 31, 2017
	All restructurings			Restructurings with payment default			All restructurings			Restructurings with payment default
(Dollars in thousands)	Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end		Number of loans	Recorded investment at period end
PCI loans
Interest only period provided
Commercial and industrial	1	$	644	—	$	—	—	$	—	—	$	—
Total interest only	1	644		—	—		—	—		—	—
Below market interest rate
Residential mortgage	—	—		—	—		2	181		1	73
Total below market interest rate	—	—		—	—		2	181		1	73
Discharged from bankruptcy
Commercial mortgage	2	1,627		2	1,627		—	—		—	—
Total discharged from bankruptcy	2	1,627		2	1,627		—	—		—	—
Total PCI restructurings	3	$	2,271	2	$	1,627	2	$	181	1	$	73

For the three months ended March 31, 2018 and March 31, 2017, the pre-modification and post-modification outstanding recorded investments of loans modified as TDRs were not materially different.

The following table provides a summary of total TDRs by accrual status.

	March 31, 2018						December 31, 2017
(Dollars in thousands)	Accruing		Nonaccruing		Total		Accruing		Nonaccruing		Total
Commercial loans
Construction and land development - commercial	$	948	$	253	$	1,201	$	4,089	$	483	$	4,572
Commercial mortgage	61,444		12,964		74,408		62,358		15,863		78,221
Other commercial real estate	950		491		1,441		1,012		788		1,800
Commercial and industrial	7,000		1,049		8,049		7,598		910		8,508
Lease financing	902		1,066		1,968		722		1,048		1,770
Other	—		—		—		521		—		521
Total commercial TDRs	71,244		15,823		87,067		76,300		19,092		95,392
Noncommercial
Residential mortgage	36,432		9,651		46,083		34,067		9,475		43,542
Revolving mortgage	19,267		5,364		24,631		17,673		5,180		22,853
Construction and land development - noncommercial	2,914		183		3,097		—		—		—
Consumer and other	2,063		529		2,592		2,351		423		2,774
Total noncommercial TDRs	60,676		15,727		76,403		54,091		15,078		69,169
Total TDRs	$	131,920	$	31,550	$	163,470	$	130,391	$	34,170	$	164,561

The majority of TDRs are included in the special mention, substandard or doubtful credit grading categories, which results in more elevated loss expectations when projecting the expected cash flows that are used to determine the allowance for loan losses associated with these loans. When a restructured loan subsequently defaults, it is evaluated and downgraded if appropriate. The more severely graded the loan, the lower the estimated expected cash flows and the greater the allowance recorded. Further, all TDRs are individually evaluated for impairment through a review of collateral values or analysis of cash flows at least annually.

The following table shows the accrual status of non-PCI and PCI TDRs.

(Dollars in thousands)	March 31, 2018		December 31, 2017
Accruing TDRs:
PCI	$	18,380	$	18,163
Non-PCI	113,540		112,228
Total accruing TDRs	131,920		130,391
Nonaccruing TDRs:
PCI	250		272
Non-PCI	31,300		33,898
Total nonaccruing TDRs	31,550		34,170
All TDRs:
PCI	18,630		18,435
Non-PCI	144,840		146,126
Total TDRs	$	163,470	$	164,561

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Other Real Estate Owned (Tables)

3 Months Ended

Mar. 31, 2018

Banking and Thrift [Abstract]

Changes in other real estate owned

The following table explains changes in other real estate owned during the three months ended March 31, 2018 and March 31, 2017.

(Dollars in thousands)	Total
Balance at December 31, 2016	$	61,231
Additions	5,822
Sales	(8,845		)
Write-downs	(1,717		)
Balance at March 31, 2017	$	56,491
Balance at December 31, 2017	$	51,097
Additions	6,582
Sales	(8,380		)
Write-downs	(1,210		)
Balance at March 31, 2018	$	48,089

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FDIC Shared-Loss Receivable (Tables)

3 Months Ended

Mar. 31, 2018

FDIC Shared-Loss Receivable [Abstract]

Changes In Payable to FDIC

	Three months ended March 31
(Dollars in thousands)	2018		2017
Beginning balance	$	101,342	$	97,008
Accretion	992		954
Adjustments related to changes in assumptions	132		51
Ending balance	$	102,466	$	98,013

Changes in Receivable From FDIC

The following table provides changes in the FDIC shared-loss receivable for the three months ended March 31, 2018 and March 31, 2017.

	Three months ended March 31
(Dollars in thousands)	2018			2017
Beginning balance	$	2,223		$	4,172
Accretion	(421		)	(600		)
Net cash payments to FDIC	—			2,760
Post-acquisition adjustments	1,834			(2,591		)
Termination of FDIC shared-loss agreements	—			240
Ending balance	$	3,636		$	3,981

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Mortgage Servicing Rights (Tables)

3 Months Ended

Mar. 31, 2018

Mortgage Servicing Rights [Abstract]

Mortgage servicing rights

The activity of the servicing asset for the three months ended March 31, 2018 and 2017 is presented in the following table:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Beginning balance	$	21,945		$	20,415
Servicing rights originated	1,200			1,702
Amortization	(1,486		)	(1,350		)
Valuation allowance reversal	—			4
Ending balance	$	21,659		$	20,771

Mortgage servicing rights valuation allowance

Mortgage servicing rights economic assumptions

Valuation of mortgage servicing rights is performed using a pooling methodology. Similar loans are pooled together and evaluated on a discounted earnings basis to determine the present value of future earnings. Key economic assumptions used to value mortgage servicing rights as of March 31, 2018 and December 31, 2017 were as follows:

	March 31, 2018			December 31, 2017
Discount rate - conventional fixed loans	9.74		%	9.41		%
Discount rate - all loans excluding conventional fixed loans	10.74		%	10.41		%
Weighted average constant prepayment rate	9.15		%	10.93		%
Weighted average cost to service a loan	$	72.8		$	64.03

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Repurchase Agreements (Tables)

3 Months Ended

Mar. 31, 2018

Repurchase Agreements [Abstract]

Schedule of Repurchase Agreements

The remaining contractual maturity of the securities sold under agreements to repurchase by class of collateral pledged included in borrowings on the Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017 is presented in the following tables.

	March 31, 2018
	Remaining Contractual Maturity of the Agreements
(Dollars in thousands)	Overnight and continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
U.S. Treasury	$	522,207	$	—	$	—	$	—	$	522,207
Gross amount of recognized liabilities for repurchase agreements									$	522,207
	December 31, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
U.S. Treasury	$	556,171	$	—	$	30,000	$	—	$	586,171
Gross amount of recognized liabilities for repurchase agreements									$	586,171

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Estimated Fair Values (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Level 3 Significant Unobservable Input Assumptions

(Dollars in thousands)			March 31, 2018
Level 3 assets	Valuation technique	Significant unobservable input	Fair Value
Corporate bonds	Indicative bid provided by broker	Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company	$	59,653
Other	Indicative bid provided by broker	Multiple factors, including but not limited to, current operations, financial condition, cash flows, and recently executed financing transactions related to the company	5,618

Estimated Fair Values For Certain Financial Assets And Financial Liabilities

For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of March 31, 2018 and December 31, 2017. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk that would cause the fair value to differ from the carrying value. Cash and due from banks is classified on the fair value hierarchy as Level 1. Overnight investments, income earned not collected, short-term borrowings and accrued interest payable are considered Level 2. Lastly, the receivable from the FDIC for shared-loss agreements is designated as Level 3.

(Dollars in thousands)	March 31, 2018				December 31, 2017
	Carrying value		Fair value		Carrying value		Fair value
Cash and due from banks	$	248,139	$	248,139	$	336,150	$	336,150
Overnight investments	1,946,882		1,946,882		1,387,927		1,387,927
Investment securities available for sale	6,857,740		6,857,740		7,180,180		7,180,180
Investment securities held to maturity	74		79		76		81
Marketable equity securities	110,107		110,107		—		—
Loans held for sale	46,660		46,660		51,179		51,179
Net loans and leases	23,388,861		22,672,287		23,374,932		22,257,803
Receivable from the FDIC for shared-loss agreements	3,636		3,636		2,223		2,223
Income earned not collected	96,607		96,607		95,249		95,249
Federal Home Loan Bank stock	20,810		20,810		52,685		52,685
Mortgage servicing rights	21,659		27,512		21,945		26,170
Deposits	29,969,245		29,924,950		29,266,275		29,230,768
Short-term borrowings	554,758		554,758		693,807		693,807
Long-term obligations	194,413		203,061		870,240		852,112
Payable to the FDIC for shared-loss agreements	102,466		103,440		101,342		102,684
Accrued interest payable	1,498		1,498		3,952		3,952

Assets And Liabilities Carried At Fair Value On A Recurring Basis

For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of March 31, 2018 and December 31, 2017.

	March 31, 2018
			Fair value measurements using:
(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	1,553,893	$	—	$	1,553,893	$	—
Government agency	31,909		—		31,909		—
Mortgage-backed securities	5,206,667		—		5,206,667		—
Corporate bonds	59,653		—		—		59,653
Other	5,618		—		—		5,618
Total investment securities available for sale	$	6,857,740	$	—	$	6,792,469	$	65,271
Marketable equity securities	$	110,107	$	21,749	$	88,358	$	—
Loans held for sale	$	46,660	$	—	$	46,660	$	—
	December 31, 2017
			Fair value measurements using:
	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Investment securities available for sale
U.S. Treasury	$	1,657,864	$	—	$	1,657,864	$	—
Government agency	8,670		—		8,670		—
Mortgage-backed securities	5,340,756		—		5,340,756		—
Equity securities	105,208		19,341		85,867		—
Corporate bonds	59,963		—		59,963		—
Other	7,719		—		7,719		—
Total investment securities available for sale	$	7,180,180	$	19,341	$	7,160,839	$	—
Loans held for sale	$	51,179	$	—	$	51,179	$	—

Fair Value Option

The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for residential real estate originated for sale measured at fair value as of March 31, 2018 and December 31, 2017.

	March 31, 2018
(Dollars in thousands)	Fair Value		Aggregate Unpaid Principal Balance		Difference
Originated loans held for sale	$	46,660	$	45,732	$	928
	December 31, 2017
	Fair Value		Aggregate Unpaid Principal Balance		Difference
Originated loans held for sale	$	51,179	$	49,796	$	1,383

No originated loans held for sale were 90 or more days past due or on nonaccrual status as of March 31, 2018 or December 31, 2017.

Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis

For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of March 31, 2018 and December 31, 2017.

	March 31, 2018
			Fair value measurements using:
(Dollars in thousands)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Impaired loans	$	73,892	$	—	$	—	$	73,892
Other real estate remeasured during current year	11,695		—		—		11,695
	December 31, 2017
			Fair value measurements using:
	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Impaired loans	$	72,539	$	—	$	—	$	72,539
Other real estate remeasured during current year	40,167		—		—		40,167

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Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

BancShares Plan

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

BancShares Plan

For the three months ended March 31, 2018 and 2017, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Service cost	$	3,429		$	3,376
Interest cost	7,057			7,380
Expected return on assets	(11,957		)	(10,698		)
Amortization of prior service cost	20			52
Amortization of net actuarial loss	3,246			2,234
Net periodic benefit cost	$	1,795		$	2,344

Bancorporation Plan

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

Bancorporation Plan

For the three months ended March 31, 2018 and 2017, the components of net periodic benefit cost are as follows:

	Three months ended March 31
(Dollars in thousands)	2018			2017
Service cost	$	662		$	671
Interest cost	1,587			1,683
Expected return on assets	(3,106		)	(2,796		)
Amortization of net actuarial loss	71			214
Net periodic benefit cost	$	(786	)	$	(228	)

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]

Schedule of fair falue for off-balance sheet risks

The following table presents the commitments to extend credit and unfunded commitments as of March 31, 2018 and December 31, 2017:

(Dollars in thousands)	March 31, 2018		December 31, 2017
Unused commitments to extend credit	$	9,994,802	$	9,629,365
Standby letters of credit	81,059		81,530
Unfunded commitments for investments in affordable housing projects	63,803		61,819

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Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule Of Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive loss included the following as of March 31, 2018 and December 31, 2017:

	March 31, 2018									December 31, 2017
(Dollars in thousands)	Accumulated other comprehensive loss			Deferred tax benefit			Accumulated other comprehensive loss, net of tax			Accumulated other comprehensive loss			Deferred tax benefit			Accumulated other comprehensive loss, net of tax
Unrealized losses on securities available for sale	$	(157,460	)	$	(36,217	)	$	(121,243	)	$	(48,834	)	$	(17,889	)	$	(30,945	)
Funded status of defined benefit plans	(141,662		)	(32,582		)	(109,080		)	(144,999		)	(53,650		)	(91,349		)
Total	$	(299,122	)	$	(68,799	)	$	(230,323	)	$	(193,833	)	$	(71,539	)	$	(122,294	)

The following table highlights changes in accumulated other comprehensive (loss) income by component for the three months ended March 31, 2018 and March 31, 2017:

	Three months ended March 31, 2018
(Dollars in thousands)	Unrealized (losses) gains on securities available for sale1			Defined benefit pension items1			Total
Beginning balance	$	(30,945	)	$	(91,349	)	$	(122,294	)
Cumulative effect adjustments	(29,752		)	(20,300		)	(50,052		)
Other comprehensive loss before reclassifications	(60,546		)	—			(60,546		)
Amounts reclassified from accumulated other comprehensive (loss) income	—			2,569			2,569
Net current period other comprehensive (loss) income	(60,546		)	2,569			(57,977		)
Ending balance	$	(121,243	)	$	(109,080	)	$	(230,323	)
	Three months ended March 31, 2017
	Unrealized (losses) gains on securities available for sale1			Defined benefit pension items1			Total
Beginning balance	$	(45,875	)	$	(89,317	)	$	(135,192	)
Other comprehensive income before reclassifications	22,677			—			22,677
Amounts reclassified from accumulated other comprehensive (loss) income	15			1,559			1,574
Net current period other comprehensive income	22,692			1,559			24,251
Ending balance	$	(23,183	)	$	(87,758	)	$	(110,941	)

¹ All amounts are net of tax.

Reclassification out of Accumulated Other Comprehensive Income

(Dollars in thousands)	Three months ended March 31, 2018
Details about accumulated other comprehensive income (loss)	Amounts reclassified from accumulated other comprehensive income (loss)1			Affected line item in the statement where net income is presented
Amortization of defined benefit pension items
Prior service costs	$	(20	)	Salaries and wages
Actuarial losses	(3,317		)	Other
	(3,337		)	Income before income taxes
	768			Income taxes
	$	(2,569	)	Net income
Total reclassifications for the period	$	(2,569	)
	Three months ended March 31, 2017
Details about accumulated other comprehensive income (loss)	Amounts reclassified from accumulated other comprehensive income (loss)1			Affected line item in the statement where net income is presented
Unrealized gains and losses on securities available for sale	$	(24	)	Securities losses, net
	9			Income taxes
	$	(15	)	Net income
Amortization of defined benefit pension items
Prior service costs	$	(52	)	Salaries and wages
Actuarial losses	(2,448		)	Other
	(2,500		)	Income before income taxes
	941			Income taxes
	$	(1,559	)	Net income
Total reclassifications for the period	$	(1,574	)

¹ Amounts in parentheses indicate debits to profit/loss.

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Accounting Policies and Basis of Presentation Accounting Policies and Basis of Presentation (Recently Adopted Accounting Standards) (Details) $ in Millions		3 Months Ended		12 Months Ended
	Dec. 22, 2017 Rate	Mar. 31, 2018 USD ($) basis_points	Mar. 31, 2017 USD ($)	Dec. 31, 2017 Rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Federal Statutory Income Tax Rate, Percent | Rate	21.00%			35.00%
Merchant processing			$ 18.3
Cardholder processing			6.8
Cardholder reward programs			$ 2.5
Income tax ASU cumulative effect adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ 31.3
Financial Instruments ASU cumulative effect adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption		18.7
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		65.0
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 85.0
Capital basis points | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Capital Quantification | basis_points		4
Capital basis points | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Capital Quantification | basis_points		6

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Business Combinations (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	May 01, 2018	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Jan. 13, 2017	Mar. 11, 2016
Business Acquisition [Line Items]
Assets		$ 34,436,437		$ 34,527,512
Loans and Leases		23,611,977		23,596,825
Deposits		29,969,245		29,266,275
PCI loans and leases					$ 0	$ 85,149
Gain on acquisitions		0	$ 12,017
Merger-related expenses		598	$ 833
Goodwill		150,601		$ 150,601
HomeBancorp Inc. [Member]
Business Acquisition [Line Items]
Assets		912,600
Loans and Leases		597,700
Deposits		$ 647,100
Subsequent Event [Member] | HomeBancorp Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition, Share Price	$ 15.03
Business Combination, Consideration Transferred	$ 113,700

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Business Combinations (Loans Acquired) (Details) - USD ($) $ in Thousands	Jan. 13, 2017	Mar. 11, 2016
Business Acquisition [Line Items]
PCI loans and leases	$ 0	$ 85,149

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Investments (Aggregate Values and Unrealized Gains and Losses) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment securities available for sale
Cost	$ 7,015,200	$ 7,229,014
Gross Unrealized Gains	1,412	32,094
Gross Unrealized Losses	158,872	80,928
Fair Value	6,857,740	7,180,180
Investment securities held to maturity
Cost	74	76
U. S. Treasury
Investment securities available for sale
Cost	1,557,991	1,658,410
Gross Unrealized Gains	0	0
Gross Unrealized Losses	4,098	546
Fair Value	1,553,893	1,657,864
Government Agency
Investment securities available for sale
Cost	32,006	8,695
Gross Unrealized Gains	12	15
Gross Unrealized Losses	109	40
Fair Value	31,909	8,670
Mortgage Backed Securities
Investment securities available for sale
Cost	5,360,251	5,419,379
Gross Unrealized Gains	1,001	1,529
Gross Unrealized Losses	154,585	80,152
Fair Value	5,206,667	5,340,756
Investment securities held to maturity
Cost	74	76
Held To Maturity Securities Accumulated Unrecognized Holding Gain	5	5
Held To Maturity Securities Accumulated Unrecognized Holding Loss	0	0
Fair Value	79	81
Equity Securities
Investment securities available for sale
Cost	0	75,471
Gross Unrealized Gains		29,737
Gross Unrealized Losses		0
Fair Value	0	105,208
Corporate Bonds
Investment securities available for sale
Cost	59,414	59,414
Gross Unrealized Gains	319	557
Gross Unrealized Losses	80	8
Fair Value	59,653	59,963
Other
Investment securities available for sale
Cost	5,538	7,645
Gross Unrealized Gains	80	256
Gross Unrealized Losses	0	182
Fair Value	$ 5,618	$ 7,719

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Investments (Maturity Information) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment securities available for sale
Total investment securities available for sale, cost	$ 7,015,200	$ 7,229,014
Total investment securities available for sale, fair value	6,857,740	7,180,180
Investment securities held to maturity
Investment securities held to maturity	74	76
Debt Securities
Investment securities available for sale
Maturing in one year or less, cost	1,105,460	808,768
Maturing in one through five years, cost	453,082	850,532
Maturing in over ten years, cost	36,104	14,532
Maturing in one year or less, fair value	1,103,291	808,301
Maturing in one through five years, fair value	451,152	850,450
Maturing in over ten years, fair value	36,084	14,579
Investment securities held to maturity
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	60,303	60,332
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	60,546	60,886
Mortgage Backed Securities
Investment securities available for sale
Total investment securities available for sale, cost	5,360,251	5,419,379
Total investment securities available for sale, fair value	5,206,667	5,340,756
Investment securities held to maturity
Investment securities held to maturity	74	76
Fair Value	79	81
Equity Securities
Investment securities available for sale
Total investment securities available for sale, cost	0	75,471
Total investment securities available for sale, fair value	$ 0	$ 105,208

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Investments (Unrealized Losses) (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Unrealized Losses Related to Marketability of Securities or Issuer's Ability to Honor Redemption Obligations	$ 0	$ 0
Investment securities available for sale:
Fair Value, Less than 12 months	3,880,315,000	3,752,642,000
Unrealized Losses, Less than 12 months	62,816,000	21,458,000
Fair Value, 12 months or more	2,637,746,000	2,975,631,000
Unrealized Losses, Greater than 12 months	96,056,000	59,470,000
Fair Value, Total	6,518,061,000	6,728,273,000
Unrealized Losses, Total	158,872,000	80,928,000
U. S. Treasury
Investment securities available for sale:
Fair Value, Less than 12 months	1,453,968,000	1,408,166,000
Unrealized Losses, Less than 12 months	4,049,000	345,000
Fair Value, 12 months or more	99,925,000	249,698,000
Unrealized Losses, Greater than 12 months	49,000	201,000
Fair Value, Total	1,553,893,000	1,657,864,000
Unrealized Losses, Total	4,098,000	546,000
Government Agency
Investment securities available for sale:
Fair Value, Less than 12 months	12,059,000	848,000
Unrealized Losses, Less than 12 months	81,000	12,000
Fair Value, 12 months or more	2,159,000	2,527,000
Unrealized Losses, Greater than 12 months	28,000	28,000
Fair Value, Total	14,218,000	3,375,000
Unrealized Losses, Total	109,000	40,000
Mortgage Backed Securities
Investment securities available for sale:
Fair Value, Less than 12 months	2,404,338,000	2,333,254,000
Unrealized Losses, Less than 12 months	58,606,000	20,911,000
Fair Value, 12 months or more	2,535,662,000	2,723,406,000
Unrealized Losses, Greater than 12 months	95,979,000	59,241,000
Fair Value, Total	4,940,000,000	5,056,660,000
Unrealized Losses, Total	154,585,000	80,152,000
Corporate bonds
Investment securities available for sale:
Fair Value, Less than 12 months		5,025,000
Unrealized Losses, Less than 12 months		8,000
Fair Value, 12 months or more		0
Unrealized Losses, Greater than 12 months		0
Fair Value, Total		5,025,000
Unrealized Losses, Total		8,000
Equity Securities
Investment securities available for sale:
Unrealized Losses, Total		0
Corporate Bonds
Investment securities available for sale:
Fair Value, Less than 12 months	9,950,000
Unrealized Losses, Less than 12 months	80,000
Fair Value, 12 months or more	0
Unrealized Losses, Greater than 12 months	0
Fair Value, Total	9,950,000
Unrealized Losses, Total	80,000	8,000
Other
Investment securities available for sale:
Fair Value, Less than 12 months		5,349,000
Unrealized Losses, Less than 12 months		182,000
Fair Value, 12 months or more		0
Unrealized Losses, Greater than 12 months		0
Fair Value, Total		5,349,000
Unrealized Losses, Total	$ 0	$ 182,000

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Investments (Securities Gains (Losses)) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Investments [Abstract]
Gross gains on sales of investment securities available for sale	$ 3
Gross losses on sales of investment securities available for sale	$ (27)

XML

Investments Marketable Equity Securities Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Marketable Equity Securities Gains (Losses) [Abstract]
Marketable equity securities gain (loss), net	$ 971	$ 0
Net gains (losses) recognized on marketable equity securities sold	96
Unrealized gains (losses) recognized on marketable equity securities held	$ 875

XML

Investments (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018 USD ($) investments	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Schedule of Investments [Line Items]
Marketable equity securities	$ 110,107,000		$ 0
Unrealized Losses Related to Marketability of Securities or Issuer's Ability to Honor Redemption Obligations	0		0
Fair Value, 12 months or more in unrealized loss position	2,637,746,000		2,975,631,000
Unrealized Losses, Greater than 12 months	96,056,000		59,470,000
Investment value deemed to be OTTI	0	$ 0
Investment securities, aggregate carrying value, pledged as collateral	3,830,000,000		4,590,000,000
Investment securities available for sale	6,857,740,000		7,180,180,000
Equity Securities
Schedule of Investments [Line Items]
Investment securities available for sale	0		105,208,000
Mortgage Backed Securities
Schedule of Investments [Line Items]
Fair Value, 12 months or more in unrealized loss position	2,535,662,000		2,723,406,000
Unrealized Losses, Greater than 12 months	$ 95,979,000		59,241,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | investments	224
Investment securities available for sale	$ 5,206,667,000		5,340,756,000
U. S. Treasury
Schedule of Investments [Line Items]
Fair Value, 12 months or more in unrealized loss position	99,925,000		249,698,000
Unrealized Losses, Greater than 12 months	$ 49,000		201,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | investments	1
Investment securities available for sale	$ 1,553,893,000		$ 1,657,864,000
Financial Instruments ASU cumulative effect adjustment
Schedule of Investments [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 18,700,000

XML

Loans and Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Threshold period past due for write-off of Business credit card loans (days)
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 6,260,000		$ 6,080,000
Advances from Federal Home Loan Banks	85,200		835,200
Federal Home Loan Bank Advances, Current Borrowing Capacity	6,170,000		5,240,000
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	1,500		1,700
Loans and Leases Receivable, Gross, Carrying Amount, Covered	65,500		67,800
Federal Reserve Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	2,160,000		2,080,000
Loans held for sale	46,660		51,179
Transfer of Portfolio Loans and Leases to Held-for-sale	0	$ 32,130
Proceeds From Sales of Loans	138,538	195,131
Proceeds from sales of portfolio loans	0	32,294
Gain (Loss) on sale of loans and leases	0	164
Non-PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccruing	89,260		92,534
Accretion Income	2,900	3,200
PCI Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccruing	1,600		600
Accretion Income	18,000	$ 19,400
Guaranty Bank
Financing Receivable, Recorded Investment [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining	13,300		14,200
Cordia Bancorp Inc.
Financing Receivable, Recorded Investment [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining	2,500		2,700
Bancorporation
Financing Receivable, Recorded Investment [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining	16,400		18,100
Federal Home Loan Bank of Atlanta
Financing Receivable, Recorded Investment [Line Items]
Loans Pledged as Collateral	9,110,000		8,750,000
Federal Reserve Bank
Financing Receivable, Recorded Investment [Line Items]
Loans Pledged as Collateral	$ 2,860,000		$ 2,770,000

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Loans and Leases (Loans and Leases Outstanding) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Non-PCI loans	$ 22,908,140	$ 22,833,827
PCI loans	703,837	762,998	$ 848,816	$ 809,169
Total loans and leases	23,611,977	23,596,825
Commercial
Non-PCI loans	14,871,562	14,799,054
PCI loans	355,928	393,419
Commercial | Construction and land development
Non-PCI loans	738,413	669,215
PCI loans	9,316	10,135
Commercial | Mortgage
Non-PCI loans	9,859,136	9,729,022
PCI loans	325,073	358,103
Commercial | Other commercial real estate
Non-PCI loans	386,734	473,433
PCI loans	16,179	17,124
Commercial | Commercial and industrial
Non-PCI loans	2,695,205	2,730,407
PCI loans	3,732	6,374
Commercial | Lease financing
Non-PCI loans	910,589	894,801
Commercial | Other
Non-PCI loans	281,485	302,176
PCI loans	1,628	1,683
Noncommercial
Non-PCI loans	8,036,578	8,034,773
PCI loans	347,909	369,579
Noncommercial | Construction and land development
Non-PCI loans	243,114	248,289
PCI loans	3,006	4,163
Noncommercial | Mortgage
Non-PCI loans	3,587,791	3,523,786
PCI loans	282,338	299,318
Noncommercial | Revolving mortgage
Non-PCI loans	2,651,648	2,701,525
PCI loans	60,388	63,908
Noncommercial | Consumer
Non-PCI loans	1,554,025	1,561,173
PCI loans	$ 2,177	$ 2,190

XML

Loans and Leases (Composition of the Loans and Leases Outstanding By Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	$ 703,837	$ 762,998	$ 848,816	$ 809,169
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	14,871,562	14,799,054
PCI loans	355,928	393,419
Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	9,859,136	9,729,022
PCI loans	325,073	358,103
Commercial | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	386,734	473,433
PCI loans	16,179	17,124
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	2,695,205	2,730,407
PCI loans	3,732	6,374
Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	910,589	894,801
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	281,485	302,176
PCI loans	1,628	1,683
Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	738,413	669,215
PCI loans	9,316	10,135
Commercial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	14,432,179	14,348,308
PCI loans	175,513	201,332
Commercial | Pass | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	9,661,079	9,521,019
PCI loans	157,187	181,353
Commercial | Pass | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	382,679	468,942
PCI loans	12,739	13,830
Commercial | Pass | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	2,476,337	2,511,307
PCI loans	1,642	4,057
Commercial | Pass | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	900,464	883,779
Commercial | Pass | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	278,367	298,064
PCI loans	254	275
Commercial | Pass | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	733,253	665,197
PCI loans	3,691	1,817
Commercial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	125,375	131,983
PCI loans	63,504	63,257
Commercial | Special Mention | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	81,680	78,643
PCI loans	61,443	61,295
Commercial | Special Mention | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	1,187	1,260
PCI loans	307	323
Commercial | Special Mention | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	37,571	44,130
PCI loans	488	374
Commercial | Special Mention | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	3,347	4,340
Commercial | Special Mention | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	1,107	2,919
PCI loans	928	945
Commercial | Special Mention | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	483	691
PCI loans	338	320
Commercial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	150,526	161,794
PCI loans	110,518	117,068
Commercial | Substandard | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	115,039	128,848
PCI loans	101,734	106,807
Commercial | Substandard | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	2,868	3,224
PCI loans	2,615	2,163
Commercial | Substandard | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	19,357	18,617
PCI loans	1,492	1,843
Commercial | Substandard | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	6,734	6,585
Commercial | Substandard | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	1,889	1,193
PCI loans	446	463
Commercial | Substandard | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	4,639	3,327
PCI loans	4,231	5,792
Commercial | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	2,246	647
PCI loans	6,364	11,735
Commercial | Doubtful | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	1,338	262
PCI loans	4,709	8,648
Commercial | Doubtful | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	0	0
PCI loans	518	808
Commercial | Doubtful | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	836	385
PCI loans	81	73
Commercial | Doubtful | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	0	0
Commercial | Doubtful | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	72	0
PCI loans	0	0
Commercial | Doubtful | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	0	0
PCI loans	1,056	2,206
Commercial | Ungraded
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	161,236	156,322
PCI loans	29	27
Commercial | Ungraded | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	0	250
PCI loans	0	0
Commercial | Ungraded | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	0	7
PCI loans	0	0
Commercial | Ungraded | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	161,104	155,968
PCI loans	29	27
Commercial | Ungraded | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	44	97
Commercial | Ungraded | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	50	0
PCI loans	0	0
Commercial | Ungraded | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	38	0
PCI loans	0	0
Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	347,909	369,579
Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	282,338	299,318
Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	3,006	4,163
Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	60,388	63,908
Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	2,177	2,190
Non-PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	22,908,140	22,833,827
Past due loans	127,286	144,872
Current loans	22,780,854	22,688,955
Non-PCI Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	9,859,136	9,729,022
Past due loans	21,609	21,153
Current loans	9,837,527	9,707,869
Non-PCI Loans | Commercial | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	386,734	473,433
Past due loans	189	182
Current loans	386,545	473,251
Non-PCI Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	2,695,205	2,730,407
Past due loans	11,620	9,470
Current loans	2,683,585	2,720,937
Non-PCI Loans | Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	910,589	894,801
Past due loans	5,234	4,123
Current loans	905,355	890,678
Non-PCI Loans | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	281,485	302,176
Past due loans	222	327
Current loans	281,263	301,849
Non-PCI Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	738,413	669,215
Past due loans	3,139	1,290
Current loans	735,274	667,925
Non-PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	8,036,578	8,034,773
Current loans	7,951,305	7,926,446
Non-PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	3,587,791	3,523,786
Past due loans	45,464	57,851
Current loans	3,542,327	3,465,935
Non-PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	243,114	248,289
Past due loans	4,007	8,641
Current loans	239,107	239,648
Non-PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	2,651,648	2,701,525
Past due loans	23,526	27,135
Current loans	2,628,122	2,674,390
Non-PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-PCI loans	1,554,025	1,561,173
Past due loans	12,276	14,700
Current loans	1,541,749	1,546,473
PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	703,837	762,998
PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current loans	307,843	318,632
PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current loans	249,443	257,166
PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current loans	2,420	3,521
PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current loans	53,885	55,871
PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current loans	2,095	2,074
90 Days or greater | Non-PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	44,383	45,791
90 Days or greater | Non-PCI Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	7,058	6,490
90 Days or greater | Non-PCI Loans | Commercial | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	73	75
90 Days or greater | Non-PCI Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,503	1,266
90 Days or greater | Non-PCI Loans | Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,512	973
90 Days or greater | Non-PCI Loans | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	129	133
90 Days or greater | Non-PCI Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	357	357
90 Days or greater | Non-PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	33,751	36,497
90 Days or greater | Non-PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	19,202	21,901
90 Days or greater | Non-PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,122	1,379
90 Days or greater | Non-PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	10,526	10,222
90 Days or greater | Non-PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,901	2,995
90 Days or greater | PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	26,862	31,392
90 Days or greater | PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	22,263	26,781
90 Days or greater | PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	567	0
90 Days or greater | PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	3,990	4,569
90 Days or greater | PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	42	42
60 to 89 Days past due | Non-PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	15,972	19,050
60 to 89 Days past due | Non-PCI Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	4,738	2,375
60 to 89 Days past due | Non-PCI Loans | Commercial | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	22	0
60 to 89 Days past due | Non-PCI Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,844	1,510
60 to 89 Days past due | Non-PCI Loans | Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	45	167
60 to 89 Days past due | Non-PCI Loans | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	47	6
60 to 89 Days past due | Non-PCI Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	771	442
60 to 89 Days past due | Non-PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	8,505	14,550
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,429	8,064
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	0	108
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	3,636	3,485
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,440	2,893
60 to 89 Days past due | PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,287	6,212
60 to 89 Days past due | PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,436	4,846
60 to 89 Days past due | PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	0	642
60 to 89 Days past due | PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	851	701
60 to 89 Days past due | PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	0	23
30 to 59 Days past due | Non-PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	66,931	80,031
30 to 59 Days past due | Non-PCI Loans | Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	9,813	12,288
30 to 59 Days past due | Non-PCI Loans | Commercial | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	94	107
30 to 59 Days past due | Non-PCI Loans | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	8,273	6,694
30 to 59 Days past due | Non-PCI Loans | Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	3,677	2,983
30 to 59 Days past due | Non-PCI Loans | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	46	188
30 to 59 Days past due | Non-PCI Loans | Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,011	491
30 to 59 Days past due | Non-PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	43,017	57,280
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	23,833	27,886
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	2,885	7,154
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	9,364	13,428
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	6,935	8,812
30 to 59 Days past due | PCI Loans | Noncommercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	10,917	13,343
30 to 59 Days past due | PCI Loans | Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	9,196	10,525
30 to 59 Days past due | PCI Loans | Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	19	0
30 to 59 Days past due | PCI Loans | Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	1,662	2,767
30 to 59 Days past due | PCI Loans | Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due loans	$ 40	$ 51

XML

Loans and Leases (Aging Of The Outstanding Loans and Leases By Class) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	$ 703,837	$ 762,998	$ 848,816	$ 809,169
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	355,928	393,419
Non-PCI loans	14,871,562	14,799,054
Commercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	9,316	10,135
Non-PCI loans	738,413	669,215
Commercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	325,073	358,103
Non-PCI loans	9,859,136	9,729,022
Commercial | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	16,179	17,124
Non-PCI loans	386,734	473,433
Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	3,732	6,374
Non-PCI loans	2,695,205	2,730,407
Commercial | Lease financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-PCI loans	910,589	894,801
Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	1,628	1,683
Non-PCI loans	281,485	302,176
Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	347,909	369,579
Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	3,006	4,163
Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	282,338	299,318
Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	60,388	63,908
Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	2,177	2,190
PCI Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
PCI loans	703,837	762,998
PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current loans	307,843	318,632
PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current loans	2,420	3,521
PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current loans	249,443	257,166
PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current loans	53,885	55,871
PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current loans	2,095	2,074
Non-PCI Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	127,286	144,872
Current loans	22,780,854	22,688,955
Non-PCI loans	22,908,140	22,833,827
Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,139	1,290
Current loans	735,274	667,925
Non-PCI loans	738,413	669,215
Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	21,609	21,153
Current loans	9,837,527	9,707,869
Non-PCI loans	9,859,136	9,729,022
Non-PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	189	182
Current loans	386,545	473,251
Non-PCI loans	386,734	473,433
Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	11,620	9,470
Current loans	2,683,585	2,720,937
Non-PCI loans	2,695,205	2,730,407
Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	5,234	4,123
Current loans	905,355	890,678
Non-PCI loans	910,589	894,801
Non-PCI Loans | Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	222	327
Current loans	281,263	301,849
Non-PCI loans	281,485	302,176
Non-PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current loans	7,951,305	7,926,446
Non-PCI loans	8,036,578	8,034,773
Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	4,007	8,641
Current loans	239,107	239,648
Non-PCI loans	243,114	248,289
Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	45,464	57,851
Current loans	3,542,327	3,465,935
Non-PCI loans	3,587,791	3,523,786
Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	23,526	27,135
Current loans	2,628,122	2,674,390
Non-PCI loans	2,651,648	2,701,525
Non-PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	12,276	14,700
Current loans	1,541,749	1,546,473
Non-PCI loans	1,554,025	1,561,173
90 Days or greater | PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	26,862	31,392
90 Days or greater | PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	567	0
90 Days or greater | PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	22,263	26,781
90 Days or greater | PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,990	4,569
90 Days or greater | PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	42	42
90 Days or greater | Non-PCI Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	44,383	45,791
90 Days or greater | Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	357	357
90 Days or greater | Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	7,058	6,490
90 Days or greater | Non-PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	73	75
90 Days or greater | Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,503	1,266
90 Days or greater | Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,512	973
90 Days or greater | Non-PCI Loans | Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	129	133
90 Days or greater | Non-PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	33,751	36,497
90 Days or greater | Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,122	1,379
90 Days or greater | Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	19,202	21,901
90 Days or greater | Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	10,526	10,222
90 Days or greater | Non-PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,901	2,995
60 to 89 Days past due | PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,287	6,212
60 to 89 Days past due | PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	642
60 to 89 Days past due | PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,436	4,846
60 to 89 Days past due | PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	851	701
60 to 89 Days past due | PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	23
60 to 89 Days past due | Non-PCI Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	15,972	19,050
60 to 89 Days past due | Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	771	442
60 to 89 Days past due | Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	4,738	2,375
60 to 89 Days past due | Non-PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	22	0
60 to 89 Days past due | Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,844	1,510
60 to 89 Days past due | Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	45	167
60 to 89 Days past due | Non-PCI Loans | Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	47	6
60 to 89 Days past due | Non-PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	8,505	14,550
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	0	108
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,429	8,064
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,636	3,485
60 to 89 Days past due | Non-PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,440	2,893
30 to 59 Days past due | PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	10,917	13,343
30 to 59 Days past due | PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	19	0
30 to 59 Days past due | PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	9,196	10,525
30 to 59 Days past due | PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	1,662	2,767
30 to 59 Days past due | PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	40	51
30 to 59 Days past due | Non-PCI Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	66,931	80,031
30 to 59 Days past due | Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,011	491
30 to 59 Days past due | Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	9,813	12,288
30 to 59 Days past due | Non-PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	94	107
30 to 59 Days past due | Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	8,273	6,694
30 to 59 Days past due | Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	3,677	2,983
30 to 59 Days past due | Non-PCI Loans | Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	46	188
30 to 59 Days past due | Non-PCI Loans | Noncommercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	43,017	57,280
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	2,885	7,154
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	23,833	27,886
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	9,364	13,428
30 to 59 Days past due | Non-PCI Loans | Noncommercial | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due loans	$ 6,935	$ 8,812

XML

Loans and Leases (Recorded Investment, By Class, In Loans And Leases On Nonaccrual Status And Loans And Leases Greater Than 90 Days Past Due And Still Accruing) (Details) - Non-PCI Loans - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	$ 89,260	$ 92,534
Loans and leases greater than 90 days and accruing	3,030	2,978
Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,059	1,040
Loans and leases greater than 90 days and accruing	0	0
Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	20,505	22,625
Loans and leases greater than 90 days and accruing	32	397
Commercial | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	616	916
Loans and leases greater than 90 days and accruing	0	0
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	2,928	2,884
Loans and leases greater than 90 days and accruing	721	428
Commercial | Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,687	1,992
Loans and leases greater than 90 days and accruing	0	0
Noncommercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	1,722	1,989
Loans and leases greater than 90 days and accruing	0	0
Noncommercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	37,038	38,942
Loans and leases greater than 90 days and accruing	0	0
Noncommercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	202	164
Loans and leases greater than 90 days and accruing	0	0
Noncommercial | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	21,421	19,990
Loans and leases greater than 90 days and accruing	0	0
Noncommercial | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccruing	2,082	1,992
Loans and leases greater than 90 days and accruing	$ 2,277	$ 2,153

XML

Loans and Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Jan. 13, 2017	Mar. 11, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	$ 1,108,379	$ 1,155,034
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	762,998	809,169
Fair value of acquired loans				$ 0	$ 85,149
Accretion	17,973	19,351
Payments received and other changes, net	(77,134)	(64,853)
Ending balance	703,837	$ 848,816
Loans on the Cost Recovery Method
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans on cost recovery method	1,275		$ 1,100
Commercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	393,419
Ending balance	355,928
Noncommercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	369,579
Ending balance	347,909
Construction and land development | Commercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	10,135
Ending balance	9,316
Construction and land development | Noncommercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	4,163
Ending balance	3,006
Mortgage | Commercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	358,103
Ending balance	325,073
Mortgage | Noncommercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	299,318
Ending balance	282,338
Revolving mortgage | Noncommercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	63,908
Ending balance	60,388
Other commercial real estate | Commercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	17,124
Ending balance	16,179
Commercial and industrial | Commercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	6,374
Ending balance	3,732
Other | Commercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	1,683
Ending balance	1,628
Consumer | Noncommercial
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	2,190
Ending balance	2,177
PCI Loans
Carrying Value of Acquired Impaired Loans [Roll Forward]
Beginning balance	762,998
Ending balance	703,837
Nonaccruing	$ 1,600		$ 600

XML

Loans and Leases (Changes In Carrying Amount Of Accretable Yield) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Accretable yield	$ 309,345	$ 341,474	$ 316,679	$ 335,074
Additions from acquisitions	0	16,653
Accretion	(17,973)	(19,351)
Reclassifications from nonaccretable difference	(929)	11,277
Changes in expected cash flows that do not affect nonaccretable difference	$ 11,568	$ (2,179)

XML

Loans and Leases Loans and Leases (Schedule of Contractually Required Payments Including Principal and Interest, Expected Cash Flows to be Collected and Fair Values) (Details) - USD ($) $ in Thousands	Jan. 13, 2017	Mar. 11, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans and leases	$ 0	$ 85,149

XML

Allowance for Loan and Lease Losses (Summary of Activity In Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Net loans and leases			$ 23,388,861	$ 23,374,932
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			703,837	762,998	$ 848,816	$ 809,169
Allowance for loan and lease losses			223,116	221,893
Commercial
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			355,928	393,419
Commercial | Construction and land development
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			9,316	10,135
Commercial | Mortgage
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			325,073	358,103
Commercial | Other commercial real estate
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			16,179	17,124
Commercial | Commercial and industrial
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			3,732	6,374
Commercial | Other
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			1,628	1,683
Noncommercial
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			347,909	369,579
Noncommercial | Construction and land development
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			3,006	4,163
Noncommercial | Mortgage
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			282,338	299,318
Noncommercial | Revolving mortgage
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			60,388	63,908
Noncommercial | Consumer
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			2,177	2,190
Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired Financing Receivable, Related Allowance			9,866	9,728
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 211,867	$ 205,026
Provision for Loan, Lease, and Other Losses	5,251	11,076
Charge-offs	(9,613)	(8,709)
Recoveries	3,315	2,626
Ending balance	210,820	210,019
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			155,950	155,646
Loans and leases collectively evaluated for impairment			22,752,190	22,678,181
Net loans and leases			22,908,140	22,833,827
ALLL for loans and leases individually evaluated for impairment			9,866	9,728
ALLL for loans and leases collectively evaluated for impairment			200,954	202,139
Total allowance for loan and lease losses	211,867	205,026	210,820	211,867	210,019	205,026
Non-PCI Loans | Commercial | Construction and land development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	24,470	28,877
Provision for Loan, Lease, and Other Losses	2,225	2,536
Charge-offs	0	(77)
Recoveries	23	55
Ending balance	26,718	31,391
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			1,131	788
Loans and leases collectively evaluated for impairment			737,282	668,427
Net loans and leases			738,413	669,215
ALLL for loans and leases individually evaluated for impairment			171	185
ALLL for loans and leases collectively evaluated for impairment			26,547	24,285
Total allowance for loan and lease losses	24,470	28,877	26,718	24,470	31,391	28,877
Non-PCI Loans | Commercial | Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	45,005	48,278
Provision for Loan, Lease, and Other Losses	(1,365)	6
Charge-offs	(46)	(37)
Recoveries	239	364
Ending balance	43,833	48,611
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			70,277	73,655
Loans and leases collectively evaluated for impairment			9,788,859	9,655,367
Net loans and leases			9,859,136	9,729,022
ALLL for loans and leases individually evaluated for impairment			3,521	3,648
ALLL for loans and leases collectively evaluated for impairment			40,312	41,357
Total allowance for loan and lease losses	45,005	48,278	43,833	45,005	48,611	48,278
Non-PCI Loans | Commercial | Other commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,571	3,269
Provision for Loan, Lease, and Other Losses	(1,293)	304
Charge-offs	0	(5)
Recoveries	145	4
Ending balance	3,423	3,572
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			1,499	1,857
Loans and leases collectively evaluated for impairment			385,235	471,576
Net loans and leases			386,734	473,433
ALLL for loans and leases individually evaluated for impairment			306	209
ALLL for loans and leases collectively evaluated for impairment			3,117	4,362
Total allowance for loan and lease losses	4,571	3,269	3,423	4,571	3,572	3,269
Non-PCI Loans | Commercial | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	53,697	50,225
Provision for Loan, Lease, and Other Losses	(425)	3,592
Charge-offs	(1,475)	(3,253)
Recoveries	1,219	265
Ending balance	53,016	50,829
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			7,611	7,974
Loans and leases collectively evaluated for impairment			2,687,594	2,722,433
Net loans and leases			2,695,205	2,730,407
ALLL for loans and leases individually evaluated for impairment			621	665
ALLL for loans and leases collectively evaluated for impairment			52,395	53,032
Total allowance for loan and lease losses	53,697	50,225	53,016	53,697	50,829	50,225
Non-PCI Loans | Commercial | Lease financing
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,127	5,907
Provision for Loan, Lease, and Other Losses	987	575
Charge-offs	(854)	(173)
Recoveries	41	6
Ending balance	6,301	6,315
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			2,166	1,914
Loans and leases collectively evaluated for impairment			908,423	892,887
Net loans and leases			910,589	894,801
ALLL for loans and leases individually evaluated for impairment			494	397
ALLL for loans and leases collectively evaluated for impairment			5,807	5,730
Total allowance for loan and lease losses	6,127	5,907	6,301	6,127	6,315	5,907
Non-PCI Loans | Commercial | Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,689	3,127
Provision for Loan, Lease, and Other Losses	114	517
Charge-offs	(3)	(123)
Recoveries	42	13
Ending balance	4,842	3,534
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			0	521
Loans and leases collectively evaluated for impairment			281,485	301,655
Net loans and leases			281,485	302,176
ALLL for loans and leases individually evaluated for impairment			0	0
ALLL for loans and leases collectively evaluated for impairment			4,842	4,689
Total allowance for loan and lease losses	4,689	3,127	4,842	4,689	3,534	3,127
Non-PCI Loans | Noncommercial | Construction and land development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,962	1,596
Provision for Loan, Lease, and Other Losses	107	(83)
Charge-offs	(182)	0
Recoveries	26	0
Ending balance	3,913	1,513
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			3,803	4,551
Loans and leases collectively evaluated for impairment			239,311	243,738
Net loans and leases			243,114	248,289
ALLL for loans and leases individually evaluated for impairment			82	68
ALLL for loans and leases collectively evaluated for impairment			3,831	3,894
Total allowance for loan and lease losses	3,962	1,596	3,913	3,962	1,513	1,596
Non-PCI Loans | Noncommercial | Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	15,706	14,447
Provision for Loan, Lease, and Other Losses	1,512	1,351
Charge-offs	(806)	(250)
Recoveries	77	287
Ending balance	16,489	15,835
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			41,347	37,842
Loans and leases collectively evaluated for impairment			3,546,444	3,485,944
Net loans and leases			3,587,791	3,523,786
ALLL for loans and leases individually evaluated for impairment			2,905	2,733
ALLL for loans and leases collectively evaluated for impairment			13,584	12,973
Total allowance for loan and lease losses	15,706	14,447	16,489	15,706	15,835	14,447
Non-PCI Loans | Noncommercial | Revolving mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	22,436	21,013
Provision for Loan, Lease, and Other Losses	466	550
Charge-offs	(992)	(825)
Recoveries	194	552
Ending balance	22,104	21,290
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			25,525	23,770
Loans and leases collectively evaluated for impairment			2,626,123	2,677,755
Net loans and leases			2,651,648	2,701,525
ALLL for loans and leases individually evaluated for impairment			1,053	1,085
ALLL for loans and leases collectively evaluated for impairment			21,051	21,351
Total allowance for loan and lease losses	22,436	21,013	22,104	22,436	21,290	21,013
Non-PCI Loans | Noncommercial | Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	31,204	28,287
Provision for Loan, Lease, and Other Losses	2,923	1,728
Charge-offs	(5,255)	(3,966)
Recoveries	1,309	1,080
Ending balance	30,181	27,129
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Loans and leases individually evaluated for impairment			2,591	2,774
Loans and leases collectively evaluated for impairment			1,551,434	1,558,399
Net loans and leases			1,554,025	1,561,173
ALLL for loans and leases individually evaluated for impairment			713	738
ALLL for loans and leases collectively evaluated for impairment			29,468	30,466
Total allowance for loan and lease losses	31,204	28,287	30,181	31,204	27,129	28,287
PCI Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,026	13,769
Provision for Loan, Lease, and Other Losses	2,354	(2,845)
Charge-offs	(84)	0
Recoveries	0	0
Ending balance	12,296	10,924
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	10,026	13,769	12,296	10,026	10,924	13,769
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			703,837	762,998
PCI Loans | Commercial | Construction and land development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	142	483
Provision for Loan, Lease, and Other Losses	310	(186)
Charge-offs	0	0
Recoveries	0	0
Ending balance	452	297
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	142	483	452	142	297	483
PCI Loans | Commercial | Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,564	6,423
Provision for Loan, Lease, and Other Losses	1,608	(1,230)
Charge-offs	(84)	0
Recoveries	0	0
Ending balance	8,088	5,193
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	6,564	6,423	8,088	6,564	5,193	6,423
PCI Loans | Commercial | Other commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	221	502
Provision for Loan, Lease, and Other Losses	(46)	(158)
Charge-offs	0	0
Recoveries	0	0
Ending balance	175	344
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	221	502	175	221	344	502
PCI Loans | Commercial | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	306	504
Provision for Loan, Lease, and Other Losses	13	(142)
Charge-offs	0	0
Recoveries	0	0
Ending balance	319	362
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	306	504	319	306	362	504
PCI Loans | Noncommercial | Construction and land development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	193	0
Provision for Loan, Lease, and Other Losses	(50)	0
Charge-offs	0	0
Recoveries	0	0
Ending balance	143	0
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	193	0	143	193	0	0
PCI Loans | Noncommercial | Mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,117	4,818
Provision for Loan, Lease, and Other Losses	264	(545)
Charge-offs	0	0
Recoveries	0	0
Ending balance	2,381	4,273
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	2,117	4,818	2,381	2,117	4,273	4,818
PCI Loans | Noncommercial | Revolving mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	259	956
Provision for Loan, Lease, and Other Losses	209	(550)
Charge-offs	0	0
Recoveries	0	0
Ending balance	468	406
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	259	956	468	259	406	956
PCI Loans | Noncommercial | Consumer and Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	224	83
Provision for Loan, Lease, and Other Losses	46	(34)
Charge-offs	0	0
Recoveries	0	0
Ending balance	270	49
Allowance for Loans and Leases Evaluated for Impairment [Abstract]
Total allowance for loan and lease losses	$ 224	$ 83	270	224	$ 49	$ 83
Loan and Leases Acquired with Deteriorated Credit Quality [Abstract]
Loans and leases acquired with deteriorated credit quality			$ 3,805	$ 3,873

XML

Allowance for Loan and Lease Losses (Allocation of Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	$ 1,108,379	$ 1,155,034
Allowance for loan and lease losses	223,116		$ 221,893
Loans and Leases Receivable, Net Amount	23,388,861		23,374,932
Non-PCI impaired loans less than $500,000 collectively evaluated	46,900		49,100
PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Acquired loans which have adverse change in expected cash flows	170,400		279,800
Provision for Loan, Lease, and Other Losses	2,354	(2,845)
Financing Receivable, Allowance for Credit Losses, Write-downs	84	0
Recoveries	0	0
PCI Loans | Commercial | Construction and land development
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	310	(186)
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	0	0
PCI Loans | Commercial | Mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	1,608	(1,230)
Financing Receivable, Allowance for Credit Losses, Write-downs	84	0
Recoveries	0	0
PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	(46)	(158)
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	0	0
PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	13	(142)
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	0	0
PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	(50)	0
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	0	0
PCI Loans | Noncommercial | Consumer and Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	46	(34)
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	0	0
PCI Loans | Noncommercial | Mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	264	(545)
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	0	0
PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan, Lease, and Other Losses	209	(550)
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Recoveries	0	0
Non-PCI Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total impaired noncovered loans and leases	155,950		155,646
Unpaid principal balance	172,656		170,034
Impaired Financing Receivable, Related Allowance	9,866		9,728
ALLL for loans and leases individually evaluated for impairment	9,866		9,728
Impaired Financing Receivable, with Related Allowance, Recorded Investment	82,789		77,199
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	73,161		78,447
Financing Receivable, Individually Evaluated for Impairment	155,950		155,646
Average balance	155,025	136,679
Interest income recognized	1,372	1,148
Provision for Loan, Lease, and Other Losses	5,251	11,076
Financing Receivable, Allowance for Credit Losses, Write-downs	9,613	8,709
Recoveries	3,315	2,626
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	200,954		202,139
Financing Receivable, Collectively Evaluated for Impairment	22,752,190		22,678,181
Loans and Leases Receivable, Net Amount	22,908,140		22,833,827
Non-PCI Loans | Commercial | Construction and land development
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	1,461		1,110
ALLL for loans and leases individually evaluated for impairment	171		185
Impaired Financing Receivable, with Related Allowance, Recorded Investment	740		788
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	391		0
Financing Receivable, Individually Evaluated for Impairment	1,131		788
Average balance	1,155	1,055
Interest income recognized	11	12
Provision for Loan, Lease, and Other Losses	2,225	2,536
Financing Receivable, Allowance for Credit Losses, Write-downs	0	77
Recoveries	23	55
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	26,547		24,285
Financing Receivable, Collectively Evaluated for Impairment	737,282		668,427
Loans and Leases Receivable, Net Amount	738,413		669,215
Non-PCI Loans | Commercial | Mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	75,584		78,936
ALLL for loans and leases individually evaluated for impairment	3,521		3,648
Impaired Financing Receivable, with Related Allowance, Recorded Investment	37,100		39,135
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	33,177		34,520
Financing Receivable, Individually Evaluated for Impairment	70,277		73,655
Average balance	72,267	75,310
Interest income recognized	711	642
Provision for Loan, Lease, and Other Losses	(1,365)	6
Financing Receivable, Allowance for Credit Losses, Write-downs	46	37
Recoveries	239	364
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	40,312		41,357
Financing Receivable, Collectively Evaluated for Impairment	9,788,859		9,655,367
Loans and Leases Receivable, Net Amount	9,859,136		9,729,022
Non-PCI Loans | Commercial | Other commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	1,614		2,267
ALLL for loans and leases individually evaluated for impairment	306		209
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,086		1,351
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	413		506
Financing Receivable, Individually Evaluated for Impairment	1,499		1,857
Average balance	1,713	1,584
Interest income recognized	11	8
Provision for Loan, Lease, and Other Losses	(1,293)	304
Financing Receivable, Allowance for Credit Losses, Write-downs	0	5
Recoveries	145	4
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,117		4,362
Financing Receivable, Collectively Evaluated for Impairment	385,235		471,576
Loans and Leases Receivable, Net Amount	386,734		473,433
Non-PCI Loans | Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	10,882		10,475
ALLL for loans and leases individually evaluated for impairment	621		665
Impaired Financing Receivable, with Related Allowance, Recorded Investment	5,514		6,326
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,097		1,648
Financing Receivable, Individually Evaluated for Impairment	7,611		7,974
Average balance	7,524	11,529
Interest income recognized	76	104
Provision for Loan, Lease, and Other Losses	(425)	3,592
Financing Receivable, Allowance for Credit Losses, Write-downs	1,475	3,253
Recoveries	1,219	265
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	52,395		53,032
Financing Receivable, Collectively Evaluated for Impairment	2,687,594		2,722,433
Loans and Leases Receivable, Net Amount	2,695,205		2,730,407
Non-PCI Loans | Commercial | Lease financing
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	3,610		2,571
ALLL for loans and leases individually evaluated for impairment	494		397
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,896		1,890
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	270		24
Financing Receivable, Individually Evaluated for Impairment	2,166		1,914
Average balance	2,238	1,568
Interest income recognized	11	14
Provision for Loan, Lease, and Other Losses	987	575
Financing Receivable, Allowance for Credit Losses, Write-downs	854	173
Recoveries	41	6
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	5,807		5,730
Financing Receivable, Collectively Evaluated for Impairment	908,423		892,887
Loans and Leases Receivable, Net Amount	910,589		894,801
Non-PCI Loans | Commercial | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance			521
ALLL for loans and leases individually evaluated for impairment	0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment			0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment			521
Financing Receivable, Individually Evaluated for Impairment	0		521
Average balance	0	196
Interest income recognized	0	2
Provision for Loan, Lease, and Other Losses	114	517
Financing Receivable, Allowance for Credit Losses, Write-downs	3	123
Recoveries	42	13
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,842		4,689
Financing Receivable, Collectively Evaluated for Impairment	281,485		301,655
Loans and Leases Receivable, Net Amount	281,485		302,176
Non-PCI Loans | Noncommercial | Construction and land development
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	4,620		5,224
ALLL for loans and leases individually evaluated for impairment	82		68
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,294		592
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,509		3,959
Financing Receivable, Individually Evaluated for Impairment	3,803		4,551
Average balance	4,104	2,605
Interest income recognized	48	33
Provision for Loan, Lease, and Other Losses	107	(83)
Financing Receivable, Allowance for Credit Losses, Write-downs	182	0
Recoveries	26	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,831		3,894
Financing Receivable, Collectively Evaluated for Impairment	239,311		243,738
Loans and Leases Receivable, Net Amount	243,114		248,289
Non-PCI Loans | Noncommercial | Mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	44,065		39,946
ALLL for loans and leases individually evaluated for impairment	2,905		2,733
Impaired Financing Receivable, with Related Allowance, Recorded Investment	23,417		19,135
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	17,930		18,707
Financing Receivable, Individually Evaluated for Impairment	41,347		37,842
Average balance	38,724	32,963
Interest income recognized	275	253
Provision for Loan, Lease, and Other Losses	1,512	1,351
Financing Receivable, Allowance for Credit Losses, Write-downs	806	250
Recoveries	77	287
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	13,584		12,973
Financing Receivable, Collectively Evaluated for Impairment	3,546,444		3,485,944
Loans and Leases Receivable, Net Amount	3,587,791		3,523,786
Non-PCI Loans | Noncommercial | Revolving mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	27,948		25,941
ALLL for loans and leases individually evaluated for impairment	1,053		1,085
Impaired Financing Receivable, with Related Allowance, Recorded Investment	9,998		5,875
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	15,527		17,895
Financing Receivable, Individually Evaluated for Impairment	25,525		23,770
Average balance	24,792	7,969
Interest income recognized	201	57
Provision for Loan, Lease, and Other Losses	466	550
Financing Receivable, Allowance for Credit Losses, Write-downs	992	825
Recoveries	194	552
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	21,051		21,351
Financing Receivable, Collectively Evaluated for Impairment	2,626,123		2,677,755
Loans and Leases Receivable, Net Amount	2,651,648		2,701,525
Non-PCI Loans | Noncommercial | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Unpaid principal balance	2,872		3,043
ALLL for loans and leases individually evaluated for impairment	713		738
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,744		2,107
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	847		667
Financing Receivable, Individually Evaluated for Impairment	2,591		2,774
Average balance	2,508	1,900
Interest income recognized	28	23
Provision for Loan, Lease, and Other Losses	2,923	1,728
Financing Receivable, Allowance for Credit Losses, Write-downs	5,255	3,966
Recoveries	1,309	$ 1,080
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	29,468		30,466
Financing Receivable, Collectively Evaluated for Impairment	1,551,434		1,558,399
Loans and Leases Receivable, Net Amount	$ 1,554,025		$ 1,561,173

XML

Allowance for Loan and Lease Losses (Troubled Debt Restructuring) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) loans	Mar. 31, 2017 USD ($) loans	Dec. 31, 2017 USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 163,470		$ 164,561
Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	118	99
Financing Receivable, Modifications, Recorded Investment	$ 144,840		146,126
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 8,778	$ 6,434
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	72	42
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3,664	$ 4,207
PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	2
Financing Receivable, Modifications, Recorded Investment	$ 18,630		18,435
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,271	$ 181
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,627	$ 73
Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	87,067		95,392
Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,201		4,572
Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	74,408		78,221
Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,441		1,800
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	8,049		8,508
Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,968		1,770
Commercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	0		521
Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	76,403		69,169
Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	3,097		0
Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	46,083		43,542
Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	24,631		22,853
Noncommercial | Consumer and Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,592		2,774
Accruing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	131,920		130,391
Accruing | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	113,540		112,228
Accruing | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	18,380		18,163
Accruing | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	71,244		76,300
Accruing | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	948		4,089
Accruing | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	61,444		62,358
Accruing | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	950		1,012
Accruing | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	7,000		7,598
Accruing | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	902		722
Accruing | Commercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	0		521
Accruing | Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	60,676		54,091
Accruing | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,914		0
Accruing | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	36,432		34,067
Accruing | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	19,267		17,673
Accruing | Noncommercial | Consumer and Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,063		2,351
Nonaccruing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	31,550		34,170
Nonaccruing | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	31,300		33,898
Nonaccruing | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	250		272
Nonaccruing | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	15,823		19,092
Nonaccruing | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	253		483
Nonaccruing | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	12,964		15,863
Nonaccruing | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	491		788
Nonaccruing | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,049		910
Nonaccruing | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,066		1,048
Nonaccruing | Commercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	0		0
Nonaccruing | Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	15,727		15,078
Nonaccruing | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	183		0
Nonaccruing | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	9,651		9,475
Nonaccruing | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	5,364		5,180
Nonaccruing | Noncommercial | Consumer and Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 529		$ 423
Interest only period provided | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 644	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Interest only period provided | Commercial | Commercial and industrial | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 644	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Loan term extension | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	6	5
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 932	$ 140
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 305	$ 577
Loan term extension | Commercial | Mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 305	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 305	$ 0
Loan term extension | Commercial | Other commercial real estate | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 530
Loan term extension | Commercial | Commercial and industrial | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 549	$ 94
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Loan term extension | Noncommercial | Consumer | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 21	$ 14
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Loan term extension | Noncommercial | Mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 32
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 47
Loan term extension | Noncommercial | Revolving mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 57	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Below market interest rate | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	66	53
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 5,660	$ 5,635
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	30	19
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,814	$ 1,685
Below market interest rate | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 181
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 73
Below market interest rate | Commercial | Construction and land development | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 60
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Below market interest rate | Commercial | Mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	6	10
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,380	$ 2,512
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 47	$ 92
Below market interest rate | Commercial | Other commercial real estate | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 4
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Below market interest rate | Commercial | Commercial and industrial | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 361	$ 108
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 11	$ 0
Below market interest rate | Commercial | Lease financing | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 839
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 769
Below market interest rate | Noncommercial | Construction and land development | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 412
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Below market interest rate | Noncommercial | Consumer | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	5	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 71	$ 14
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	3	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 48	$ 0
Below market interest rate | Noncommercial | Mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	22	30
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,189	$ 1,543
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	10	15
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,277	$ 824
Below market interest rate | Noncommercial | Mortgage | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 181
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 73
Below market interest rate | Noncommercial | Other | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 143
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0
Below market interest rate | Noncommercial | Revolving mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	25	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,659	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	11	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 431	$ 0
Discharged from bankruptcy | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	46	41
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 2,186	$ 659
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	41	21
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,545	$ 1,945
Discharged from bankruptcy | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,627	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,627	$ 0
Discharged from bankruptcy | Commercial | Mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 140	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 502	$ 190
Discharged from bankruptcy | Commercial | Commercial and industrial | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	14	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 474	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	16	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 177	$ 0
Discharged from bankruptcy | Commercial | Lease financing | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	5	16
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 304	$ 227
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 73	$ 0
Discharged from bankruptcy | Noncommercial | Consumer | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	13	18
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 262	$ 193
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	11	10
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 183	$ 128
Discharged from bankruptcy | Noncommercial | Mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 566	$ 140
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	6	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 417	$ 978
Discharged from bankruptcy | Noncommercial | Mortgage | PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,627	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 1,627	$ 0
Discharged from bankruptcy | Noncommercial | Revolving mortgage | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	5	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 440	$ 99
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 193	$ 649

XML

Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) loans	Mar. 31, 2017 USD ($) loans
Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	118	99
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 8,778	$ 6,434
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	72	42
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 3,664	$ 4,207
Non-PCI Loans | Loan term extension
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	6	5
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 932	$ 140
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 305	$ 577
Non-PCI Loans | Loan term extension | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 305	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 305	$ 0
Non-PCI Loans | Loan term extension | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 530
Non-PCI Loans | Loan term extension | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 549	$ 94
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Loan term extension | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 32
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 47
Non-PCI Loans | Loan term extension | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 57	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Loan term extension | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 21	$ 14
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	66	53
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 5,660	$ 5,635
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	30	19
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,814	$ 1,685
Non-PCI Loans | Below market interest rate | Commercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 60
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	6	10
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,380	$ 2,512
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 47	$ 92
Non-PCI Loans | Below market interest rate | Commercial | Other commercial real estate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 4
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 361	$ 108
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 11	$ 0
Non-PCI Loans | Below market interest rate | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 839
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 769
Non-PCI Loans | Below market interest rate | Noncommercial | Construction and land development
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 412
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	22	30
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,189	$ 1,543
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	10	15
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,277	$ 824
Non-PCI Loans | Below market interest rate | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	25	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,659	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	11	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 431	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	5	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 71	$ 14
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	3	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 48	$ 0
Non-PCI Loans | Below market interest rate | Noncommercial | Other
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 143
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
Non-PCI Loans | Discharged from bankruptcy
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	46	41
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,186	$ 659
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	41	21
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,545	$ 1,945
Non-PCI Loans | Discharged from bankruptcy | Commercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 140	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 502	$ 190
Non-PCI Loans | Discharged from bankruptcy | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	14	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 474	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	16	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 177	$ 0
Non-PCI Loans | Discharged from bankruptcy | Commercial | Lease financing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	5	16
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 304	$ 227
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 73	$ 0
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	8	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 566	$ 140
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	6	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 417	$ 978
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Revolving mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	5	4
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 440	$ 99
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 193	$ 649
Non-PCI Loans | Discharged from bankruptcy | Noncommercial | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	13	18
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 262	$ 193
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	11	10
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 183	$ 128
PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	3	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 2,271	$ 181
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,627	$ 73
PCI Loans | Interest only period provided
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 644	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
PCI Loans | Interest only period provided | Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 644	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 0
PCI Loans | Below market interest rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 181
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 73
PCI Loans | Below market interest rate | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	0	2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 0	$ 181
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 0	$ 73
PCI Loans | Discharged from bankruptcy
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,627	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,627	$ 0
PCI Loans | Discharged from bankruptcy | Noncommercial | Mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,627	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,627	$ 0

XML

Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Real Estate Properties [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	$ 30,600		$ 26,900
Total
Beginning balance	51,097	$ 61,231
Additions	6,582	5,822
Sales	(8,380)	(8,845)
Write-downs	(1,210)	(1,717)
Ending balance	48,089	$ 56,491
Mortgage
Total
Beginning balance	19,800
Ending balance	$ 16,500

XML

FDIC Shared-Loss Receivable (Changes in Receivable from FDIC) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Receivable From FDIC For Shared-Loss Agreements [Roll Forward]
Accretion of discounts and premiums, net	$ (421)	$ (600)
Receipt of payments from FDIC	0	2,760
Post-acquisition and other adjustments, net	1,834	(2,591)
Termination of FDIC shared-loss agreements	0	240
FDIC shared-loss receivable	$ 3,636	$ 3,981	$ 2,223	$ 4,172

XML

FDIC Shared-Loss Receivable FDIC Shared-Loss Payable (Changes in Payable to FDIC) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
FDIC Shared-Payable [Abstract]
FDIC shared-loss payable	$ 102,466	$ 98,013	$ 101,342	$ 97,008
Accretion expense	992	954
Adjustments related to changes in assumptions	$ 132	$ 51

XML

FDIC Shared-Loss Receivable (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
FDIC Shared-Loss Receivable [Abstract]
Net payment to the FDIC for termination of shared-loss agreements	$ 0	$ 285
Termination of FDIC shared-loss agreements	0	240
Loss on termination of FDIC share-loss agreements	0	(45)
FDIC shared-loss payable	102,466	98,013	$ 101,342	$ 97,008
Net Impact from FDIC shared-loss termination	0	$ (45)
Loans and Leases Receivable, Gross, Carrying Amount, Covered	$ 65,500		$ 67,800

XML

Mortgage Servicing Rights (MSR Carrying Value) ((Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Servicing Asset at Amortized Cost [Line Items]
Mortgage servicing rights	$ 21,659	$ 20,771	$ 21,945	$ 20,415
Amortization of Mortgage Servicing Rights (MSRs)	(1,486)	(1,350)
Servicing Asset at Amortized Cost, Additions	1,200	1,702
Valuation allowance (provision) reversal	$ 0	$ 4

XML

Mortgage Servicing Rights (Valuation allowance) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Valuation Allowance for Impairment of Recognized Servicing Assets [Line Items]
Valuation allowance provision (reversal)	$ 0	$ (4)

XML

Mortgage Servicing Rights (Economic Assumptions) (Details) - $ / loans	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Servicing Asset Key Economic Assumptions [Line Items]
Weighted average constant prepayment rate	9.15%	10.93%
Weighted average cost to service a loan	72.80	64.03
Conventional fixed loans
Servicing Asset Key Economic Assumptions [Line Items]
Discount rate	9.74%	9.41%
All loans excluding conventional fixed loans
Servicing Asset Key Economic Assumptions [Line Items]
Discount rate	10.74%	10.41%

XML

Mortgage Servicing Rights (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Mortgage Servicing Rights [Abstract]
Residential Mortgage Loans Serviced	$ 2,850,000		$ 2,810,000
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	1,900	$ 1,700
Amortization of Mortgage Servicing Rights (MSRs)	1,486	1,350
Valuation allowance provision (reversal)	$ 0	$ (4)

XML

Repurchase Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 535,600	$ 684,200
Securities Sold under Agreements to Repurchase, Gross	522,207	586,171
U. S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	522,207	586,171
Overnight and continuous | U. S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	522,207	556,171
Up to 30 days | U. S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	0
30 - 90 days | U. S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	0	30,000
Greater than 90 days | U. S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	$ 0	$ 0

XML

Estimated Fair Values (Estimated Fair Values For Certain Financial Assets And Financial Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 248,139	$ 336,150
Overnight investments	1,946,882	1,387,927
Investment securities available for sale	6,857,740	7,180,180
Investment securities held to maturity	74	76
Marketable equity securities	110,107	0
Loans held for sale	46,660	51,179
Loans and Leases Receivable, Net Amount	23,388,861	23,374,932
FDIC shared-loss receivable	3,636	2,223	$ 3,981	$ 4,172
Income earned not collected	96,607	95,249
Mortgage servicing rights	21,659	21,945	20,771	20,415
Deposits	29,969,245	29,266,275
FDIC shared-loss payable	102,466	101,342	$ 98,013	$ 97,008
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	248,139	336,150
Overnight investments	1,946,882	1,387,927
Investment securities available for sale	6,857,740	7,180,180
Investment securities held to maturity	74	76
Marketable equity securities	110,107	0
Loans held for sale	46,660	51,179
Loans and Leases Receivable, Net Amount	23,388,861	23,374,932
FDIC shared-loss receivable	3,636	2,223
Income earned not collected	96,607	95,249
Stock issued by Federal Home Loan Bank	20,810	52,685
Mortgage servicing rights	21,659	21,945
Deposits	29,969,245	29,266,275
Short-term borrowings	554,758	693,807
Long-term obligations	194,413	870,240
FDIC shared-loss payable	102,466	101,342
Accrued interest payable	1,498	3,952
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	248,139	336,150
Overnight investments	1,946,882	1,387,927
Investment securities available for sale	6,857,740	7,180,180
Investment securities held to maturity	79	81
Marketable equity securities	110,107	0
Loans held for sale	46,660	51,179
Loans and Leases Receivable, Net Amount	22,672,287	22,257,803
FDIC shared-loss receivable	3,636	2,223
Income earned not collected	96,607	95,249
Stock issued by Federal Home Loan Bank	20,810	52,685
Mortgage servicing rights	27,512	26,170
Deposits	29,924,950	29,230,768
Short-term borrowings	554,758	693,807
Long-term obligations	203,061	852,112
FDIC shared-loss payable	103,440	102,684
Accrued interest payable	$ 1,498	$ 3,952

XML

Estimated Fair Values (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	$ 6,857,740		$ 7,180,180
Asset transfers between Level 1 and Level 2	0
Liability transfers between Level 2 and Level 1	0
Asset transfers between Level 2 and Level 1	0
Gains (Losses) from fair value changes on originated loans held for sale	(455)	$ 3,161
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability measured at fair value on nonrecurring basis	$ 0		$ 0
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discounts for collateral value estimates due to estimated holding and selling costs (percent)	6.00%		6.00%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discounts for collateral value estimates due to estimated holding and selling costs (percent)	11.00%		11.00%
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	$ 59,700
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	$ 5,600

XML

Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	$ 6,857,740	$ 7,180,180
Marketable equity securities	110,107	0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	6,857,740
Marketable equity securities	110,107
Loans held for sale	46,660	51,179
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	19,341
Marketable equity securities	21,749
Loans held for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	6,792,469
Marketable equity securities	88,358
Loans held for sale	46,660	51,179
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	65,271	0
Marketable equity securities	0
Loans held for sale	0	0
Fair Value, Measurements, Recurring | U.S. Treasury
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	1,553,893	1,657,864
Fair Value, Measurements, Recurring | U.S. Treasury | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | U.S. Treasury | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	1,553,893	1,657,864
Fair Value, Measurements, Recurring | U.S. Treasury | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Government Agency
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	31,909	8,670
Fair Value, Measurements, Recurring | Government Agency | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Government Agency | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	31,909	8,670
Fair Value, Measurements, Recurring | Government Agency | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Mortgage Backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	5,206,667	5,340,756
Fair Value, Measurements, Recurring | Mortgage Backed Securities | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Mortgage Backed Securities | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	5,206,667	5,340,756
Fair Value, Measurements, Recurring | Mortgage Backed Securities | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	5,618	7,719
Fair Value, Measurements, Recurring | Other | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Other | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	7,719
Fair Value, Measurements, Recurring | Other | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	5,618	0
Fair Value, Measurements, Recurring | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	59,653	59,963
Fair Value, Measurements, Recurring | Corporate Bonds | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Corporate Bonds | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	0	59,963
Fair Value, Measurements, Recurring | Corporate Bonds | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale	$ 59,653	$ 0

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Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate remeasured during current year	$ 48,089	$ 51,097	$ 56,491	$ 61,231
Mortgage servicing rights	21,659	21,945	$ 20,771	$ 20,415
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	73,892	72,539
Other real estate remeasured during current year	11,695	40,167
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate remeasured during current year	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate remeasured during current year	0	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	73,892	72,539
Other real estate remeasured during current year	$ 11,695	$ 40,167

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Estimated Fair Values (Fair Value Option) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) from fair value changes on originated loans held for sale	$ (455)	$ 3,161
Loans Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value of originated loans held for sale	46,660		$ 51,179
Aggregate unpaid principle balance of originated loans held for sale	45,732		49,796
Difference between fair value and aggregate unpaid principle balance of originated loans held for sale	$ 928		$ 1,383

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Employee Benefit Plans (Components Of Pension Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
BancShares Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 3,429	$ 3,376
Interest cost	7,057	7,380
Expected return on assets	(11,957)	(10,698)
Amortization of prior service cost	20	52
Amortization of net actuarial loss	3,246	2,234
Total pension expense	1,795	2,344
Bancorporation Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	662	671
Interest cost	1,587	1,683
Expected return on assets	(3,106)	(2,796)
Amortization of net actuarial loss	71	214
Total pension expense	$ (786)	$ (228)

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Employee Benefit Plans (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions in current year	$ 50.0
BancShares Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	0.0
Bancorporation Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0.0

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Commitments and Contingencies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Advances	Dec. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Guarantor Obligations [Line Items]
Qualified Affordable Housing Project Investments	$ 134,400	$ 128,004
FDIC shared-loss receivable	3,636	2,223	$ 3,981	$ 4,172
FDIC shared-loss payable	$ 102,466	101,342	$ 98,013	$ 97,008
Number Of Federal Home Loan Bank Advances | Advances
Commitments to Extend Credit
Guarantor Obligations [Line Items]
Unused Commitments to Extend Credit	$ 9,994,802	9,629,365
Qualified Affordable Housing Project Investments, Commitment	63,803	61,819
Standby Letters of Credit
Guarantor Obligations [Line Items]
Guarantor obligations amount	$ 81,059	81,530
Recourse Obligation on Mortgage Loans Sold
Guarantor Obligations [Line Items]
Recourse Period, Maximum1	180 days
Obligation to Repurchase Receivables Sold
Guarantor Obligations [Line Items]
Reserve for estimated losses arising from repurchase of loans	$ 900	$ 900

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Accumulated Other Comprehensive Income (Loss) (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), before Tax		$ (299,122)		$ (193,833)
Deferred tax expense (benefit)		(68,799)		(71,539)
Accumulated other comprehensive income (loss), net of tax		(230,323)	$ (110,941)	(122,294)	$ (135,192)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(2,569)	(1,574)
Amortization of actuarial losses and prior service cost		(3,317)	(2,448)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		3,337	2,500
Unrealized Gains on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss), before Tax		(157,460)		(48,834)
Deferred tax expense (benefit)		(36,217)		(17,889)
Accumulated other comprehensive income (loss), net of tax	[1]	(121,243)	(23,183)	(30,945)	(45,875)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[1]	0	(15)
Funded Status of Defined Benefit Plan
Accumulated Other Comprehensive Income (Loss), before Tax		(141,662)		(144,999)
Deferred tax expense (benefit)		(32,582)		(53,650)
Accumulated other comprehensive income (loss), net of tax	[1]	(109,080)	(87,758)	$ (91,349)	$ (89,317)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[1]	$ (2,569)	$ (1,559)

[1] All amounts are net of tax.

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Accumulated Other Comprehensive Income (Loss) (Components of AOCI) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ (122,294)	$ (135,192)
Other comprehensive income before reclassifications		(60,546)	22,677
Amounts reclassified from accumulated other comprehensive (loss) income		2,569	1,574
Net current period other comprehensive income		(57,977)	24,251
Ending balance		(230,323)	(110,941)
Unrealized Gains on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	[1]	(30,945)	(45,875)
Other comprehensive income before reclassifications	[1]	(60,546)	22,677
Amounts reclassified from accumulated other comprehensive (loss) income	[1]	0	15
Net current period other comprehensive income	[1]	(60,546)	22,692
Ending balance	[1]	(121,243)	(23,183)
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	[1]	(91,349)	(89,317)
Other comprehensive income before reclassifications	[1]	0	0
Amounts reclassified from accumulated other comprehensive (loss) income	[1]	2,569	1,559
Net current period other comprehensive income	[1]	2,569	1,559
Ending balance	[1]	$ (109,080)	$ (87,758)

[1] All amounts are net of tax.

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Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains and losses on available for sale securities reclassified from AOCI before tax		$ 0	$ (24)
Amortization of actuarial losses and prior service cost		(3,317)	(2,448)
Total before taxes		(3,337)	(2,500)
Amounts reclassified from accumulated other comprehensive income, net of tax		2,569	1,574
Unrealized gains and losses on available for sale securities reclassified from AOCI tax		0	9
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			(15)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		(20)	(52)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax		768	941
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax		(2,569)	(1,559)
Unrealized Gains on Investment Securities Available for Sale
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive income, net of tax	[1]	0	15
Defined Benefit Pension Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive income, net of tax	[1]	$ 2,569	$ 1,559

[1] All amounts are net of tax.