10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2019

OR

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

For the transition period from _______ to ________.

Commission File Number:  001-37886

CAPSTAR FINANCIAL HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Tennessee	81-1527911
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)
1201 Demonbreun Street, Suite 700 Nashville, Tennessee (Address of principal executive offices)	37203 (Zip Code)

(615) 732-6400

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $1.00 par value per share	CSTR	Nasdaq Global Select Market

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

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

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

Large Accelerated Filer	☐	Accelerated Filer	☒
Non-Accelerated Filer	☐	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  ☒

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

	Shares outstanding as of October 31, 2019
Common Stock, par value $1.00 per share	18,357,921

CAPSTAR FINANCIAL HOLDINGS, INC.

QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

Item		Page
PART I – FINANCIAL INFORMATION
Item 1.	Consolidated Financial Statements	5
	Consolidated Balance Sheets as of September 30, 2019 (Unaudited) and December 31, 2018	5
	Consolidated Statements of Income (Unaudited) for the three and nine months ended September 30, 2019 and 2018	6
	Consolidated Statements of Comprehensive Income (Unaudited) for the three and nine months ended September 30, 2019 and 2018	7
	Consolidated Statements of Changes in Shareholders’ Equity (Unaudited) for the three and nine months ended September 30, 2019 and 2018	8
	Consolidated Statements of Cash Flows (Unaudited) for the nine months ended September 30, 2019 and 2018	10
	Notes to Consolidated Financial Statements (Unaudited)	11
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	32
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	43
Item 4.	Controls and Procedures	44
PART II – OTHER INFORMATION		45
Item 1.	Legal Proceedings	45
Item 1A.	Risk Factors	45
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	46
Item 5.	Other Information	47
Item 6.	Exhibits	47
SIGNATURES		49

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TERMINOLOGY

The terms “we,” “our,” “us,” “CapStar,” “the Company,” “CSTR” and “CapStar Financial” that appear in this Quarterly Report on Form 10-Q (this “Report”) refer to CapStar Financial Holdings, Inc. and its wholly-owned subsidiary, CapStar Bank, which we sometimes refer to as “CapStar Bank,” “our bank subsidiary,” “the Bank” and “our Bank”.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Report contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”).  These forward-looking statements reflect our current views with respect to, among other things, future events and our financial performance. These statements are often, but not always, made through the use of words or phrases such as “may,” “should,” “could,” “predict,” “potential,” “believe,” “will likely result,” “expect,” “continue,” “will,” “anticipate,” “seek,” “aspire,” “roadmap,” “achieve,” “estimate,” “intend,” “plan,” “project,” “projection,” “forecast,” “goal,” “target,” “would,” and “outlook,” or the negative version of those words or other comparable words of a future or forward-looking nature. These forward-looking statements are not historical facts, and are based on current expectations, estimates and projections about our industry, management’s beliefs and certain assumptions made by management, many of which, by their nature, are inherently uncertain and beyond our control. The inclusion of these forward-looking statements should not be regarded as a representation by us or any other person that such expectations, estimates and projections will be achieved. Accordingly, we caution you that any such forward-looking statements are not guarantees of future performance and are subject to risks, assumptions and uncertainties that are difficult to predict and that are beyond our control. Although we believe that the expectations reflected in these forward-looking statements are reasonable as of the date of this Report, actual results may prove to be materially different from the results expressed or implied by the forward-looking statements. There are or will be important factors that could cause our actual results to differ materially from those indicated in these forward-looking statements, including, but not limited to, the following:

The concentration of our business in the Nashville metropolitan statistical area (“MSA”) and Tennessee, and the effect of changes in the economic, political and environmental conditions on this market; increased competition in the financial services industry, locally, regionally or nationally, which may adversely affect pricing and the other terms offered to our clients; an increase in the cost of deposits, loss of deposits or a change in the deposit mix, which could increase our cost of funding; an increase in the costs of capital, which could negatively affect our ability to borrow funds, successfully raise additional capital or participate in strategic acquisition opportunities; fluctuations or differences in interest rates on loans or deposits from those that we are modeling, the impact to our earnings from a change in interest rates and our overall management of interest rate risk; the acceptance by customers of Athens of the Company’s products and services; the ability of the Company to meet expectations regarding the benefits, costs, synergies and financial and operational impact of the Athens merger; the possibility that any of the anticipated benefits, costs, synergies and financial and operational improvements of the Athens merger will not be realized or will not be realized as expected; the opportunities to enhance market share in certain markets and the acceptance of the Company generally in new markets; economic conditions (including interest rate environment, government economic and monetary policies, the strength of global financial markets and inflation and deflation) that impact the financial services industry as a whole and/or our business; our dependence on our management team and board of directors and changes in our management and board composition; our reputation in the community; our ability to execute our strategy to achieve our loan, ROAA and efficiency ratio goals, hire seasoned bankers, and achieve deposit growth through organic growth and strategic acquisitions; credit risks related to the size of our borrowers and our ability to adequately identify, assess and limit our credit risk; our concentration of large loans to a small number of borrowers as well as to borrowers located within the Nashville MSA and Tennessee; the significant portion of our loan portfolio that originated during the past two years and therefore may less reliably predict future collectability than older loans; the adequacy of reserves (including our allowance for loan losses) and the appropriateness of our methodology for calculating such reserves; non-performing loans and leases; non-performing assets; charge-offs, non-accruals, troubled debt restructurings, impairments and other credit-related issues; adverse trends in the healthcare service industry, which is an integral component of our market’s economy; our management of risks inherent in our commercial real estate loan portfolio, and the risk of a prolonged downturn in the real estate market, which could impair the value of our collateral and our ability to sell collateral upon any foreclosure; governmental legislation and regulation, including changes in the nature and timing of the adoption and effectiveness of new requirements under the Dodd-Frank Act of 2010, as amended, the Tax Cuts and Jobs Act of 2017, as amended, Basel guidelines, capital requirements, accounting regulation or standards and other applicable laws and regulations; the loss of large depositor relationships, which could force us to fund our business through more expensive and less stable sources; operational and liquidity risks associated with our business, including liquidity risks inherent in correspondent banking; the potential for our Bank’s regulatory lending limits and other factors related to our size to restrict our growth and prevent us from effectively implementing our business strategy; the ability to identify and consummate strategic acquisitions consistent with our goals; the sufficiency of our capital, including sources of capital and the extent to which we may be required to raise additional capital to meet our goals; fluctuations in the fair value of our investment securities that are beyond our control; deterioration in the fiscal position of the U.S. government and downgrades in Treasury and federal agency securities; potential exposure to fraud, negligence, computer theft and cyber-crime; the adequacy of our risk management framework; our dependence on our information technology and

3

telecommunications systems and the potential for any systems failures or interruptions; threats to and breaches of our information technology systems and data security, including cyber-attacks; our dependence upon outside third parties for the processing and handling of our records and data; our ability to adapt to technological change; the financial soundness of other financial institutions; our exposure to environmental liability risk associated with our lending activities; our engagement in derivative transactions; our involvement from time to time in legal proceedings and examinations and remedial actions by regulators; our involvement from time to time in litigation or other proceedings instituted by or against shareholders, customers, employees or third parties and the cost of legal fees associated with such litigation or proceedings; the susceptibility of our market to natural disasters and acts of God; and the effectiveness of our internal controls over financial reporting and our ability to remediate any future material weakness in our internal controls over financial reporting.

The foregoing factors should not be construed as exhaustive and should be read in conjunction with those factors that are detailed from time to time in the Company’s periodic and current reports filed with the Securities and Exchange Commission (the “SEC”), including those factors included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 under the heading “Item 1A. Risk Factors” and in the Company’s Quarterly Reports on Form 10-Q and Current Reports on Form 8-K.  If one or more events related to these or other risks or uncertainties materialize, or if our underlying assumptions prove to be incorrect, actual results may differ materially from our forward-looking statements. Accordingly, you should not place undue reliance on any such forward-looking statements. Any forward-looking statement speaks only as of the date of this Report, and we do not undertake any obligation to publicly update or review any forward-looking statement, whether as a result of new information, future developments or otherwise, except as required by law. New risks and uncertainties may emerge from time to time, and it is not possible for us to predict their occurrence or how they will affect us.

4

PART I. FINANCIAL INFORMATION

Item 1. Consolidated Financial Statements.

CAPSTAR FINANCIAL HOLDINGS, INC. & SUBSIDIARY

Consolidated Balance Sheets

(Dollars in thousands, except share data)

	September 30, 2019
	(unaudited)			December 31, 2018
Assets
Cash and due from banks	$	24,289		$	17,967
Interest-bearing deposits in financial institutions		129,732			76,714
Federal funds sold		—			10,762
Total cash and cash equivalents		154,021			105,443
Securities available-for-sale, at fair value		203,500			243,808
Securities held-to-maturity, fair value of $3,412, and $3,785 at    September 30, 2019 and December 31, 2018, respectively		3,319			3,734
Loans held for sale (includes $45,988 and $0 measured    at fair value at September 30, 2019 and December 31, 2018, respectively)		129,613			57,618
Loans		1,411,768			1,429,794
Less allowance for loan losses		(12,828	)		(12,113	)
Loans, net		1,398,940			1,417,681
Premises and equipment, net		19,416			18,821
Restricted equity securities		13,900			12,038
Accrued interest receivable		5,780			5,964
Goodwill		37,510			37,510
Core deposit intangible, net		7,280			8,538
Other real estate owned, net		914			988
Other assets		59,718			51,740
Total assets	$	2,033,911		$	1,963,883
Liabilities and Shareholders’ Equity
Deposits:
Non-interest-bearing	$	352,266		$	289,552
Interest-bearing		562,516			434,921
Savings and money market accounts		509,753			497,108
Time		307,228			348,427
Total deposits		1,731,763			1,570,008
Federal Home Loan Bank advances		10,000			125,000
Other liabilities		24,066			14,496
Total liabilities		1,765,829			1,709,504
Shareholders’ equity:
Series A convertible preferred stock, $1 par value; 5,000,000 shares authorized;   0 and 878,048 shares issued and outstanding at September 30, 2019 and    December 31, 2018, respectively		—			878
Common stock, voting, $1 par value; 20,000,000 shares authorized; 18,343,403 and    17,592,160 shares issued and outstanding at September 30, 2019 and December 31,    2018, respectively		18,343			17,592
Common stock, nonvoting, $1 par value; 5,000,000 shares authorized; 0 and 132,561    shares issued and outstanding at September 30, 2019 and December 31, 2018,    respectively		—			133
Additional paid-in capital		206,757			211,789
Retained earnings		41,710			27,303
Accumulated other comprehensive income (loss), net of income tax		1,272			(3,316	)
Total shareholders’ equity		268,082			254,379
Total liabilities and shareholders’ equity	$	2,033,911		$	1,963,883

See accompanying notes to consolidated financial statements (unaudited).

5

CAPSTAR FINANCIAL HOLDINGS, INC. & SUBSIDIARY

Consolidated Statements of Income (Unaudited)

(Dollars in thousands, except share data)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2019			2018			2019			2018
Interest income:
Loans, including fees	$	21,005		$	14,167		$	62,596		$	40,197
Securities:
Taxable		1,028			951			3,540			2,775
Tax-exempt		354			248			1,093			784
Federal funds sold		1			17			26			56
Restricted equity securities		183			132			584			389
Interest-bearing deposits in financial institutions		645			267			1,502			679
Total interest income		23,216			15,782			69,341			44,880
Interest expense:
Interest-bearing deposits		2,102			1,146			5,523			2,793
Savings and money market accounts		1,944			1,409			5,445			3,827
Time deposits		1,887			985			5,917			2,468
Federal funds purchased		—			1			4			3
Securities sold under agreements to repurchase		—			—			5			—
Federal Home Loan Bank advances		127			698			1,281			1,813
Total interest expense		6,060			4,239			18,175			10,904
Net interest income		17,156			11,543			51,166			33,976
Provision for loan losses		(125	)		481			761			1,328
Net interest income after provision for loan losses		17,281			11,062			50,405			32,648
Noninterest income:
Treasury management and other deposit service charges		788			528			2,399			1,357
Net gain (loss) on sale of securities		—			(1	)		(108	)		2
Tri-Net fees		847			373			2,511			1,227
Mortgage banking income		2,679			1,634			7,151			4,329
Other noninterest income		2,474			684			6,602			2,157
Total noninterest income		6,788			3,218			18,555			9,072
Noninterest expense:
Salaries and employee benefits		9,229			6,514			26,224			19,111
Data processing and software		1,790			803			5,126			2,411
Professional fees		528			255			1,571			1,074
Occupancy		858			544			2,550			1,600
Equipment		1,012			520			2,890			1,661
Regulatory fees		18			228			564			664
Merger related expenses		187			540			2,491			875
Amortization of intangibles		408			3			1,258			23
Other operating		1,501			663			4,054			2,236
Total noninterest expense		15,531			10,070			46,728			29,655
Income before income taxes		8,538			4,210			22,232			12,065
Income tax expense		2,072			554			5,231			1,702
Net income	$	6,466		$	3,656		$	17,001		$	10,363
Per share information:
Basic net income per share of common stock	$	0.36		$	0.30		$	0.96		$	0.87
Diluted net income per share of common stock	$	0.35		$	0.28		$	0.91		$	0.79
Weighted average shares outstanding:
Basic		17,741,778			12,040,229			17,729,518			11,851,476
Diluted		18,532,479			13,113,775			18,670,280			13,052,758

See accompanying notes to consolidated financial statements (unaudited).

6

CAPSTAR FINANCIAL HOLDINGS, INC. & SUBSIDIARY

Consolidated Statements of Comprehensive Income (Unaudited)

(Dollars in thousands)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2019			2018			2019			2018
Net income	$	6,466		$	3,656		$	17,001		$	10,363
Other comprehensive income (loss):
Unrealized gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period		1,112			(1,193	)		6,502			(6,120	)
Reclassification adjustment for (gains) losses included in    net income		—			1			108			(2	)
Tax effect		(291	)		312			(1,729	)		1,600
Net of tax		821			(880	)		4,881			(4,522	)
Unrealized losses on securities transferred to held-to-maturity:
Reclassification adjustment for losses included in    net income		—			—			—			14
Tax effect		—			—			—			(4	)
Net of tax		—			—			—			10
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) arising during the period		—			129			(702	)		697
Reclassification adjustment for losses included in    net income		265			224			627			698
Tax effect		—			(50	)		(218	)		(237	)
Net of tax		265			303			(293	)		1,158
Other comprehensive income (loss)		1,086			(577	)		4,588			(3,354	)
Comprehensive income	$	7,552		$	3,079		$	21,589		$	7,009

See accompanying notes to consolidated financial statements (unaudited).

7

CAPSTAR FINANCIAL HOLDINGS, INC. & SUBSIDIARY

Consolidated Statements of Changes in Shareholders’ Equity (Unaudited)

(Dollars in thousands, except share data)

	Preferred			Common Stock, voting						Common Stock, nonvoting						Additional paid-in			Retained			Accumulated other comprehensive			Total shareholders’
	stock			Shares			Amount			Shares			Amount			capital			earnings			income (loss)			equity
Balance December 31, 2018	$	878			17,592,160		$	17,592			132,561		$	133		$	211,789		$	27,303		$	(3,316	)	$	254,379
Net issuance of restricted    common stock		—			13,801			14			—			—			(182	)		—			—			(168	)
Stock-based compensation    expense		—			—			—			—			—			344			—			—			344
Net exercise of    common stock options		—			182,002			182			—			—			998			—			—			1,180
Repurchase of common stock		—			(155,400	)		(155	)		—			—			(2,276	)		—			—			(2,431	)
Common and preferred dividends    declared		—			—			—			—			—			—			(744	)		—			(744	)
Net income		—			—			—			—			—			—			4,779			—			4,779
Other comprehensive income		—			—			—			—			—			—			—			2,412			2,412
Balance March 31, 2019		878			17,632,563			17,633			132,561			133			210,673			31,338			(904	)		259,751
Net issuance of restricted    common stock		—			(6,826	)		(7	)		—			—			(6	)		—			—			(13	)
Stock-based compensation    expense		—			—			—			—			—			340			—			—			340
Net exercise of    common stock options		—			22,778			23			—			—			51			—			—			74
Repurchase of common stock		—			(219,600	)		(220	)		—			—			(3,185	)		—			—			(3,405	)
Common and preferred dividends    declared		—			—			—			—			—			—			(929	)		—			(929	)
Net income		—			—			—			—			—			—			5,756			—			5,756
Other comprehensive income		—			—			—			—			—			—			—			1,090			1,090
Balance June 30, 2019		878			17,428,915			17,429			132,561			133			207,873			36,165			186			262,664
Net issuance of restricted    common stock		—			(5,335	)		(6	)		—			—			(28	)		—			—			(34	)
Stock-based compensation    expense		—			—			—			—			—			351			—			—			351
Net exercise of    common stock options		—			39,000			39			—			—			431			—			—			470
Conversion of preferred stock to    common stock		(878	)		878,048			878			—			—			—			—			—			—
Conversion of non-voting    common stock to common    stock		—			132,561			133			(132,561	)		(133	)		—			—			—			—
Repurchase of common stock		—			(129,786	)		(130	)		—			—			(1,870	)		—			—			(2,000	)
Common and preferred dividends    declared		—			—			—			—			—			—			(921	)		—			(921	)
Net income		—			—			—			—			—			—			6,466			—			6,466
Other comprehensive income		—			—			—			—			—			—			—			1,086			1,086
Balance September 30, 2019	$	—			18,343,403		$	18,343			—		$	—		$	206,757		$	41,710		$	1,272		$	268,082

See accompanying notes to consolidated financial statements (unaudited).

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CAPSTAR FINANCIAL HOLDINGS, INC. & SUBSIDIARY

Consolidated Statements of Changes in Shareholders’ Equity (Unaudited)

(Dollars in thousands, except share data)

	Preferred		Common Stock, voting						Common Stock, nonvoting				Additional paid-in			Retained			Accumulated other comprehensive			Total shareholders’
	stock		Shares			Amount			Shares		Amount		capital			earnings			income (loss)			equity
Balance December 31, 2017	$	878		11,449,465		$	11,450			132,561	$	133	$	118,120		$	18,892		$	(2,527	)	$	146,946
Net issuance of restricted    common stock		—		24,729			25			—		—		(354	)		—			—			(329	)
Stock-based compensation    expense		—		—			—			—		—		305			—			—			305
Net exercise of    common stock options		—		61,822			62			—		—		238			—			—			300
Exercise of common stock    warrants		—		104,781			104			—		—		838			—			—			942
Net income		—		—			—			—		—		—			3,194			—			3,194
Other comprehensive loss		—		—			—			—		—		—			—			(2,666	)		(2,666	)
Balance March 31, 2018		878		11,640,797			11,641			132,561		133		119,147			22,086			(5,193	)		148,692
Net issuance of restricted    common stock		—		5,419			5			—		—		(29	)		—			—			(24	)
Stock-based compensation    expense		—		—			—			—		—		325			—			—			325
Net exercise of    common stock options		—		106,550			106			—		—		791			—			—			897
Exercise of common stock    warrants		—		45,804			47			—		—		321			—			—			368
Common and preferred dividends    declared		—		—			—			—		—		—			(514	)		—			(514	)
Net income		—		—			—			—		—		—			3,513			—			3,513
Other comprehensive loss		—		—			—			—		—		—			—			(111	)		(111	)
Balance June 30, 2018		878		11,798,570			11,799			132,561		133		120,555			25,085			(5,304	)		153,146
Net issuance of restricted    common stock		—		(6,953	)		(7	)		—		—		(60	)		—			—			(67	)
Stock-based compensation    expense		—		—			—			—		—		310			—			—			310
Net exercise of    common stock options		—		165,354			166			—		—		580			—			—			746
Exercise of common stock    warrants		—		35,590			35			—		—		261			—			—			296
Common and preferred dividends    declared		—		—			—			—		—		—			—			—			—
Net income		—		—			—			—		—		—			3,656			—			3,656
Other comprehensive loss		—		—			—			—		—		—			—			(577	)		(577	)
Balance September 30, 2018	$	878		11,992,561		$	11,993			132,561	$	133	$	121,646		$	28,741		$	(5,881	)	$	157,510

See accompanying notes to consolidated financial statements (unaudited).

9

CAPSTAR FINANCIAL HOLDINGS, INC. & SUBSIDIARY

Consolidated Statements of Cash Flows (Unaudited)

(Dollars in thousands)

	Nine Months Ended
	September 30,
	2019			2018
Cash flows from operating activities:
Net income	$	17,001		$	10,363
Adjustments to reconcile net income to net cash provided by     (used in) operating activities:
Provision for loan losses		761			1,328
Accretion of discounts on acquired loans and deferred fees		(1,908	)		(948	)
Depreciation and amortization		2,192			303
Net amortization of premiums on investment securities		577			803
Net (gain) loss on sale of securities		108			(2	)
Mortgage banking income		(7,151	)		(4,329	)
Tri-Net fees		(2,511	)		(1,227	)
Net gain on sale of loans		(823	)		(6	)
Net gain on sale of other real estate owned		(3	)		—
Stock-based compensation		1,035			940
Deferred income tax expense		874			406
Origination of loans held for sale		(594,982	)		(395,851	)
Proceeds from loans held for sale		532,649			425,007
Net increase in accrued interest receivable and other assets		(10,625	)		(1,974	)
Net increase in accrued interest payable and other liabilities		10,979			1,766
Net cash provided by (used in) operating activities		(51,827	)		36,579
Cash flows from investing activities:
Activities in securities available-for-sale:
Purchases		(27,342	)		(22,127	)
Sales		54,133			5,778
Maturities, prepayments and calls		19,460			14,611
Activities in securities held-to-maturity:
Maturities, prepayments and calls		396			—
Purchase of restricted equity securities		(1,862	)		(11	)
Net decrease (increase) in loans		20,661			(125,216	)
Purchase of premises and equipment		(1,520	)		(3,980	)
Proceeds from sale of other real estate owned		127			—
Net cash provided by (used in) investing activities		64,053			(130,945	)
Cash flows from financing activities:
Net increase in deposits		161,755			6,537
Proceeds from Federal Home Loan Bank advances		75,000			110,000
Payments on Federal Home Loan Bank advances		(190,000	)		(55,000	)
Repurchase of common stock		(7,836	)		—
Exercise of common stock options and warrants, net of repurchase of restricted shares		1,509			3,129
Common and preferred stock dividends paid		(2,573	)		(508	)
Termination of interest rate swap agreement		(1,503	)		—
Net cash provided by financing activities		36,352			64,158
Net increase (decrease) in cash and cash equivalents		48,578			(30,208	)
Cash and cash equivalents at beginning of period		105,443			82,797
Cash and cash equivalents at end of period	$	154,021		$	52,589
Supplemental disclosures of cash paid:
Interest paid	$	18,565		$	10,624
Income taxes		314			942
Cash paid for operating lease liabilities		1,338			1,216
Supplemental disclosures of noncash transactions:
Transfer of loans to other real estate	$	50		$	—
Loans charged off to the allowance for loan losses		532			251
Conversion of preferred stock and non-voting common stock		1,011			—

See accompanying notes to consolidated financial statements (unaudited).

10

CAPSTAR FINANCIAL HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited consolidated financial statements as of and for the period ended September 30, 2019 include CapStar Financial Holdings, Inc. and its wholly owned subsidiary, CapStar Bank (the “Bank”, together referred to as the “Company”). Significant intercompany transactions and accounts are eliminated in consolidation.

The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and do not include all information and footnotes required by U.S. generally accepted accounting principles (“U.S. GAAP”) for complete financial statements. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods presented have been included.  These unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and related notes appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, determination of impairment of intangible assets, including goodwill, the valuation of our investment portfolio, loans held for sale, derivative assets and liabilities, deferred tax assets and estimated liabilities.  

Loans Held For Sale and Fair Value Option

The Company classifies loans as loans held for sale when originated with the intent to sell.  As of April 1, 2019, the Company elected the fair value option for all residential mortgage loans originated with the intent to sell. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting.  The Company has not elected the fair value option for other loans held for sale primarily because they are not economically hedged using derivative instruments. The fair value of residential mortgage loans originated with the intent to sell is based on traded market prices of similar assets. Other loans held for sale that are recorded at lower of cost or fair value may be carried at fair value on a nonrecurring basis when the fair value is less than cost. For further information, see Note 13 - Fair Value.  The Company does not securitize mortgage loans.  If the Company sells loans with servicing rights retained, the carrying value of the mortgage loan sold is reduced by the amount allocated to the servicing right.   Fair values of residential mortgage loans held for sale are based on traded market prices of similar assets. The changes in fair value are recorded as a component of mortgage banking income and included gains (losses) of $(0.2) million and $0.7 million for the three and nine months ended September 30, 2019, respectively. There were no loans held for sale recorded at fair value as of December 31, 2018. The following table summarizes the difference between the fair value and the aggregate unpaid principal balance for residential real estate loans held for sale as of September 30, 2019 (dollars in thousands):

	Fair Value		Aggregate Unpaid Principal Balance		Difference
September 30, 2019
Residential mortgage loans held for sale	$	45,988	$	45,296	$	692

$0.2 million of residential mortgage loans held for sale were greater than 89 days past due and accruing or on nonaccrual status as of September 30, 2019. There were no residential mortgage loans held for sale greater than 89 days past due and accruing or on nonaccrual status as of December 31, 2018.

Subsequent Events

Accounting Standards Codification (“ASC”) 855, Subsequent Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued. The Company evaluated all events or transactions that occurred after September 30, 2019 through the date of the issued financial statements.

11

NOTE 2 – SECURITIES

The amortized cost and fair value of securities available-for-sale and held-to-maturity at September 30, 2019 and December 31, 2018 are summarized as follows (dollars in thousands):

	September 30, 2019									December 31, 2018
	Amortized Cost		Gross unrealized gains		Gross unrealized (losses)			Estimated fair value		Amortized Cost		Gross unrealized gains		Gross unrealized (losses)			Estimated fair value
Securities available-for-sale:
U. S. government agency securities	$	9,241	$	13	$	(24	)	$	9,230	$	11,053	$	—	$	(347	)	$	10,706
State and municipal securities		49,369		2,094		(20	)		51,443		62,142		765		(981	)		61,926
Mortgage-backed securities		128,332		1,828		(469	)		129,691		146,547		776		(3,165	)		144,158
Asset-backed securities		3,369		—		(136	)		3,233		15,437		4		(157	)		15,284
Other debt securities		9,813		106		(16	)		9,903		11,863		71		(200	)		11,734
Total	$	200,124	$	4,041	$	(665	)	$	203,500	$	247,042	$	1,616	$	(4,850	)	$	243,808
Securities held-to-maturity:
State and municipal securities	$	3,319	$	93	$	—		$	3,412	$	3,734	$	54	$	(3	)	$	3,785
Total	$	3,319	$	93	$	—		$	3,412	$	3,734	$	54	$	(3	)	$	3,785

Security fair values are established by an independent pricing service as of the dates indicated. The difference between amortized cost and fair value reflects current interest rates and represents the potential gain (loss) had the portfolio been liquidated on those dates. Security gains (losses) are realized only in the event of dispositions prior to maturity or other-than-temporary impairment. Securities with unrealized losses as of September 30, 2019 and December 31, 2018, and the length of time they were in continuous loss positions as of such dates are as follows (dollars in thousands):

	Less than 12 months					12 months or more					Total
September 30, 2019	Estimated fair value		Gross unrealized losses			Estimated fair value		Gross unrealized losses			Estimated fair value		Gross unrealized losses
U. S. government agency securities	$	1,990	$	(3	)	$	1,660	$	(21	)	$	3,650	$	(24	)
State and municipal securities		2,358		(11	)		816		(9	)		3,174		(20	)
Mortgage-backed securities		16,791		(51	)		36,151		(418	)		52,942		(469	)
Asset-backed securities		3,233		(136	)		—		—			3,233		(136	)
Other debt securities		—		—			1,487		(16	)		1,487		(16	)
Total temporarily impaired securities	$	24,372	$	(201	)	$	40,114	$	(464	)	$	64,486	$	(665	)
December 31, 2018
U. S. government agency securities	$	—	$	—		$	10,706	$	(347	)	$	10,706	$	(347	)
State and municipal securities		13,455		(212	)		17,376		(772	)		30,831		(984	)
Mortgage-backed securities		7,075		(17	)		87,232		(3,148	)		94,307		(3,165	)
Asset-backed securities		8,262		(145	)		2,439		(12	)		10,701		(157	)
Other debt securities		5,362		(200	)		—		—			5,362		(200	)
Total temporarily impaired securities	$	34,154	$	(574	)	$	117,753	$	(4,279	)	$	151,907	$	(4,853	)

As noted in the table above, as of September 30, 2019, the Company had unrealized losses of $0.7 million in its investment securities portfolio. The unrealized losses associated with these investment securities are driven by changes in interest rates and are recorded as a component of equity. These investment securities will continue to be monitored as a part of our ongoing impairment analysis. Management evaluates the financial performance of the issuers on a quarterly basis to determine if it is probable that the issuers can make all contractual principal and interest payments. If a shortfall in future cash flows is identified, a credit loss will be deemed to have occurred and will be recognized as a charge to earnings and a new cost basis for the security will be established. At September 30, 2019 and December 31, 2018, the Company had 45 and 127, respectively of securities in an unrealized loss position.

Because the Company currently does not intend to sell any investment securities that have an unrealized loss at September 30, 2019, and it is not more-likely-than-not that we will be required to sell these investment securities before recovery of their amortized cost bases, which may be at maturity, we do not consider these securities to be other-than-temporarily impaired at September 30, 2019.

Securities with a market value of $80.6 million at September 30, 2019 were pledged to collateralize public deposits, derivative positions and Federal Home Loan Bank advances.

12

Results from sales of debt and equity securities were as follows (dollars in thousands):

	Nine Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2018
Proceeds	$	54,133		$	5,778
Gross gains		370			107
Gross losses		(478	)		(105	)

The amortized cost and fair value of securities at September 30, 2019, by contractual maturity, are shown below (dollars in thousands). Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.

	Available-for-sale				Held-to-maturity
	Amortized cost		Estimated fair value		Amortized cost		Estimated fair value
Due in less than one year	$	7,881	$	7,963	$	881	$	884
Due one to five years		28,994		29,698		2,438		2,528
Due five to ten years		31,353		32,721		—		—
Due beyond ten years		195		194		—		—
Mortgage-backed securities		128,332		129,691		—		—
Asset-backed securities		3,369		3,233		—		—
Total	$	200,124	$	203,500	$	3,319	$	3,412

NOTE 3 – LOANS AND ALLLOWANCE FOR LOAN LOSSES

A summary of the loan portfolio as of September 30, 2019 and December 31, 2018 follows (dollars in thousands):

	September 30, 2019			December 31, 2018
Commercial real estate	$	576,748		$	550,446
Consumer real estate		254,736			253,562
Construction and land development		132,222			174,670
Commercial and industrial		382,816			404,600
Consumer		29,059			25,615
Other		36,187			20,901
Total		1,411,768			1,429,794
Allowance for loan losses		(12,828	)		(12,113	)
Total loans, net	$	1,398,940		$	1,417,681

The adequacy of the allowance for loan losses (ALL) is assessed at the end of each quarter. The ALL includes a specific component related to loans that are individually evaluated for impairment and a general component related to loans that are segregated into homogeneous pools and collectively evaluated for impairment.  The ALL factors applied to these pools are an estimate of probable incurred losses based on management’s evaluation of historical net losses from loans with similar characteristics, which are adjusted by management to reflect current events, trends, and conditions. The adjustments include consideration of the following:  changes in lending policies and procedures, economic conditions, nature and volume of the portfolio, experience of lending management, volume and severity of past due loans, quality of the loan review system, value of underlying collateral for collateral dependent loans, concentrations, and other external factors.

13

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes all commercial loans, and consumer relationships with an outstanding balance greater than $500,000, individually and assigns each loan a risk rating. This analysis is performed on a continual basis by the relationship managers and credit department personnel. On at least an annual basis an independent party performs a formal credit risk review of a sample of the loan portfolio. Among other things, this review assesses the appropriateness of the loan’s risk rating. The Company uses the following definitions for risk ratings:

Special Mention – A special mention asset possesses deficiencies or potential weaknesses deserving of management’s attention. If uncorrected, such weaknesses or deficiencies may expose the Company to an increased risk of loss in the future.

Substandard – A substandard asset is inadequately protected by the current sound net worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets classified substandard.

Doubtful – A doubtful asset has all weaknesses inherent in one classified substandard, with the added characteristic that weaknesses make collection or liquidation in full, on the basis of existing facts, conditions, and values, highly questionable and improbable. The probability of loss is extremely high, but certain important and reasonable specific pending factors which may work to the advantage and strengthening of the asset exist, therefore, its classification as an estimated loss is deferred until a more exact status may be determined. Pending factors include proposed merger, acquisition or liquidation procedures, capital injection, perfecting liens on additional collateral, and refinancing plans.

Loans not falling into the criteria above are considered to be pass-rated loans. The Company utilizes six loan grades within the pass risk rating.

The following tables present the loan balances by category as well as risk rating (dollars in thousands):

	Non-impaired Loans
September 30, 2019	Pass/Watch		Special Mention		Substandard		Total Non-impaired		TotalImpaired Loans		Total
Commercial real estate	$	563,862	$	6,631	$	3,635	$	574,128	$	2,620	$	576,748
Consumer real estate		249,952		1,656		1,806		253,414		1,322		254,736
Construction and land development		132,036		49		17		132,102		120		132,222
Commercial and industrial		364,003		12,950		4,285		381,238		1,578		382,816
Consumer		28,997		7		20		29,024		35		29,059
Other		36,187		—		—		36,187		—		36,187
Total	$	1,375,037	$	21,293	$	9,763	$	1,406,093	$	5,675	$	1,411,768
December 31, 2018
Commercial real estate	$	547,616	$	177	$	1,262	$	549,055	$	1,391	$	550,446
Consumer real estate		249,273		1,676		1,691		252,640		922		253,562
Construction and land development		174,591		52		19		174,662		8		174,670
Commercial and industrial		388,719		7,790		6,545		403,054		1,546		404,600
Consumer		25,556		1		27		25,584		31		25,615
Other		20,901		—		—		20,901		—		20,901
Total	$	1,406,656	$	9,696	$	9,544	$	1,425,896	$	3,898	$	1,429,794

14

The following tables detail the changes in the ALL for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Commercial real estate			Consumer real estate			Construction and land development		Commercial and industrial			Consumer			Other			Total
Three Months Ended September 30, 2019
Balance, beginning of period	$	3,922		$	1,142		$	1,733	$	5,518		$	166		$	422		$	12,903
Charged-off loans		—			—			—		(282	)		(30	)		(20	)		(332	)
Recoveries		4			2			—		356			18			2			382
Provision for loan losses		(36	)		101			209		(468	)		53			16			(125	)
Balance, end of period	$	3,890		$	1,245		$	1,942	$	5,124		$	207		$	420		$	12,828
Three Months Ended September 30, 2018
Balance, beginning of period	$	3,551		$	1,057		$	1,764	$	7,779		$	120		$	434		$	14,705
Charged-off loans		—			—			—		—			—			—			—
Recoveries		6			1			—		22			3			—			32
Provision for loan losses		(412	)		(75	)		449		767			(30	)		(218	)		481
Balance, end of period	$	3,145		$	983		$	2,213	$	8,568		$	93		$	216		$	15,218

	Commercial real estate			Consumer real estate			Construction and land development			Commercial and industrial			Consumer			Other			Total
Nine Months Ended September 30, 2019
Balance, beginning of period	$	3,309		$	1,005		$	2,431		$	5,036		$	105		$	227		$	12,113
Charged-off loans		—			—			—			(308	)		(109	)		(115	)		(532	)
Recoveries		16			18			—			371			60			21			486
Provision for loan losses		565			222			(489	)		25			151			287			761
Balance, end of period	$	3,890		$	1,245		$	1,942		$	5,124		$	207		$	420		$	12,828
Nine Months Ended September 30, 2018
Balance, beginning of period	$	3,324		$	1,063		$	1,628		$	7,209		$	91		$	406		$	13,721
Charged-off loans		—			—			—			(226	)		(25	)		—			(251	)
Recoveries		16			4			—			348			52			—			420
Provision for loan losses		(195	)		(84	)		585			1,237			(25	)		(190	)		1,328
Balance, end of period	$	3,145		$	983		$	2,213		$	8,568		$	93		$	216		$	15,218

15

A breakdown of the ALL and the loan portfolio by loan category at September 30, 2019 and December 31, 2018 follows (dollars in thousands):

	Commercial real estate		Consumer real estate		Construction and land development		Commercial and industrial		Consumer		Other		Total
September 30, 2019
Allowance for Loan Losses:
Collectively evaluated for impairment	$	3,890	$	1,245	$	1,942	$	5,124	$	207	$	420	$	12,828
Individually evaluated for impairment		—		—		—		—		—		—		—
Acquired with deteriorated credit quality		—		—		—		—		—		—		—
Balances, end of period	$	3,890	$	1,245	$	1,942	$	5,124	$	207	$	420	$	12,828
Loans:
Collectively evaluated for impairment	$	574,128	$	253,414	$	132,102	$	381,238	$	29,024	$	36,187	$	1,406,093
Individually evaluated for impairment		2,510		664		115		740		11		—		4,040
Acquired with deteriorated credit quality		110		658		5		838		24		—		1,635
Balances, end of period	$	576,748	$	254,736	$	132,222	$	382,816	$	29,059	$	36,187	$	1,411,768
December 31, 2018
Allowance for Loan Losses:
Collectively evaluated for impairment	$	3,309	$	1,005	$	2,431	$	5,036	$	105	$	227	$	12,113
Individually evaluated for impairment		—		—		—		—		—		—		—
Acquired with deteriorated credit quality		—		—		—		—		—		—		—
Balances, end of period	$	3,309	$	1,005	$	2,431	$	5,036	$	105	$	227	$	12,113
Loans:
Collectively evaluated for impairment	$	549,055	$	252,640	$	174,662	$	403,054	$	25,584	$	20,901	$	1,425,896
Individually evaluated for impairment		1,278		183		—		817		—		—		2,278
Acquired with deteriorated credit quality		113		739		8		729		31		—		1,620
Balances, end of period	$	550,446	$	253,562	$	174,670	$	404,600	$	25,615	$	20,901	$	1,429,794

The following table presents the allocation of the ALL for each respective loan category with the corresponding percentage of the ALL in each category to total loans, net of deferred fees as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	September 30, 2019					December 31, 2018
	Amount		Percent of total loans			Amount		Percent of total loans
Commercial real estate	$	3,890		0.28	%	$	3,309		0.23	%
Consumer real estate		1,245		0.09			1,005		0.07
Construction and land development		1,942		0.14			2,431		0.17
Commercial and industrial		5,124		0.36			5,036		0.35
Consumer		207		0.01			105		0.01
Other		420		0.03			227		0.02
Total allowance for loan losses	$	12,828		0.91	%	$	12,113		0.85	%

16

The following table presents the Company’s impaired loans that were evaluated for specific loss allowance as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	September 30, 2019						December 31, 2018
	Recorded investment		Unpaid principal balance		Related allowance		Recorded investment		Unpaid principal balance		Related allowance
With no related allowance recorded:
Commercial real estate	$	2,620	$	2,937	$	—	$	1,391	$	1,775	$	—
Consumer real estate		1,322		1,747		—		922		1,204		—
Construction and land development		120		149		—		8		18		—
Commercial and industrial		1,578		7,009		—		1,546		6,350		—
Consumer		35		64		—		31		56		—
Other		—		—		—		—		—		—
Subtotal		5,675		11,906		—		3,898		9,403		—
With an allowance recorded:
Commercial real estate		—		—		—		—		—		—
Consumer real estate		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—
Commercial and industrial		—		—		—		—		—		—
Consumer		—		—		—		—		—		—
Other		—		—		—		—		—		—
Subtotal		—		—		—		—		—		—
Total	$	5,675	$	11,906	$	—	$	3,898	$	9,403	$	—

The following table presents information related to the average recorded investment and interest income recognized on impaired loans for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Three Months Ended				Three Months Ended				Nine Months Ended				Nine Months Ended
	September 30, 2019				September 30, 2018				September 30, 2019				September 30, 2018
	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
With no related allowance recorded:
Commercial real estate	$	2,578	$	42	$	1,159	$	15	$	2,588	$	125	$	1,189	$	25
Consumer real estate		1,175		10		92		—		1,230		43		92		3
Construction and land development		115		—		—		—		124		4		—		—
Commercial and industrial		1,257		18		—		—		1,553		63		—		—
Consumer		25		—		100		—		37		2		100		3
Other		—		—		—		—		—		—		—		—
Subtotal		5,150		70		1,351		15		5,532		237		1,381		31
With an allowance recorded:
Commercial real estate		—		—		—		—		—		—		—		—
Consumer real estate		—		—		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—		—		—
Commercial and industrial		—		—		5,419		—		—		—		5,369		118
Consumer		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
Subtotal		—		—		5,419		—		—		—		5,369		118
Total	$	5,150	$	70	$	6,770	$	15	$	5,532	$	237	$	6,750	$	149

Interest income recognized on a cash basis for impaired loans amounted to $15,000 and $25,000 for the three and nine months ended September 30, 2018.  No interest income was recognized on a cash basis for impaired loans during the three or nine months ended September 30, 2019.

17

The following table presents the aging of the recorded investment in past-due loans as of September 30, 2019 and December 31, 2018 by class of loans (dollars in thousands):

	30 - 59		60 - 89		Greater Than
	Days		Days		89 Days		Total		Loans Not
	Past Due		Past Due		Past Due		Past Due		Past Due		Total
September 30, 2019
Commercial real estate	$	216	$	1,227	$	—	$	1,443	$	575,305	$	576,748
Consumer real estate		885		403		1,083		2,371		252,365		254,736
Construction and land development		—		—		—		—		132,222		132,222
Commercial and industrial		4,459		18		591		5,068		377,748		382,816
Consumer		129		6		13		148		28,911		29,059
Other		293		—		—		293		35,894		36,187
Total	$	5,982	$	1,654	$	1,687	$	9,323	$	1,402,445	$	1,411,768
December 31, 2018
Commercial real estate	$	300	$	227	$	—	$	527	$	549,919	$	550,446
Consumer real estate		69		75		775		919		252,643		253,562
Construction and land development		—		—		—		—		174,670		174,670
Commercial and industrial		54		—		—		54		404,546		404,600
Consumer		52		—		43		95		25,520		25,615
Other		—		—		—		—		20,901		20,901
Total	$	475	$	302	$	818	$	1,595	$	1,428,199	$	1,429,794

The following table presents the recorded investment in non-accrual loans, past due loans over 89 days outstanding and accruing and troubled debt restructurings (“TDR”) by class of loans as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	Non-Accrual		Past Due Over 89 Days and Accruing		Troubled Debt Restructurings
September 30, 2019
Commercial real estate	$	—	$	—	$	2,454
Consumer real estate		1,098		293		—
Construction and land development		120		—		—
Commercial and industrial		458		258		271
Consumer		25		—		—
Other		—		—		—
Total	$	1,701	$	551	$	2,725
December 31, 2018
Commercial real estate	$	—	$	—	$	1,391
Consumer real estate		1,187		214		—
Construction and land development		19		—		—
Commercial and industrial		817		—		—
Consumer		55		—		—
Other		—		—		—
Total	$	2,078	$	214	$	1,391

As of September 30, 2019 and December 31, 2018, all loans classified as nonperforming were deemed to be impaired.

As of September 30, 2019 and December 31, 2018, the Company had a recorded investment in TDR of $2.7 million and $1.4 million, respectively. The Company had no specific allowance for those loans at September 30, 2019 or December 31, 2018 and there were no commitments to lend additional amounts.  Loans accounted for as TDR include modifications from original terms such as those due to bankruptcy proceedings, certain modifications of amortization periods or extended suspension of principal payments due to customer financial difficulties.  In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification.  This evaluation is performed under the Bank’s loan policy.  Loans accounted for as TDR are individually evaluated for impairment.

18

The following table presents loans by class modified as TDR that occurred during the three and nine months ended September 30, 2019 (dollars in thousands).  There were no new TDR identified during the three or nine months ended September 30, 2018.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	Number of contracts		Pre modification outstanding recorded investment		Post modification outstanding recorded investment, net of related allowance		Number of contracts		Pre modification outstanding recorded investment		Post modification outstanding recorded investment, net of related allowance
2019
Commercial real estate		1	$	1,228	$	1,228		1	$	1,228	$	1,228
Consumer real estate		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—
Commercial and industrial		1		271		271		1		271		271
Consumer		—		—		—		—		—		—
Other		—		—		—		—		—		—
Total		2	$	1,499	$	1,499		2	$	1,499	$	1,499

There were no TDR for which there was a payment default within twelve months following the modification during the three or nine months ended September 30, 2019 or 2018.

A loan is considered to be in payment default once it is 30 days contractually past due under the modified terms.

Acquired Loans

The following table presents changes in the carrying value of purchased credit impaired (“PCI”) loans (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
Balance at beginning of period	$	1,537	$	1,620
Change due to payments received and accretion		98		15
Change due to loan charge-offs		—		—
Other		—		—
Balance at end of period	$	1,635	$	1,635

The following table presents changes in the accretable yield for PCI loans (in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Balance at beginning of period	$	405		$	440
Accretion		(145	)		(190	)
Reclassification from (to) nonaccretable difference		370			370
Other, net		—			10
Balance at end of period	$	630		$	630

PCI loans had no impact on the ALL for the three or nine months ended September 30, 2019 or 2018.

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NOTE 4 – LEASES

The Company leases certain premises and equipment under operating leases.  At September 30, 2019, the Company had lease liabilities totaling $12.6 million and right-of-use assets totaling $11.9 million related to these leases.  Lease liabilities and right-of-use assets are reflected in other liabilities and other assets, respectively.  At September 30, 2019, the weighted average remaining lease term for operating leases was 10.8 years and the weighted average discount rate used in the measurement of operating lease liabilities was 3.53%.

Lease costs were as follows (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
Operating lease cost	$	464	$	1,402
Short-term lease cost		—		—
Variable least cost		—		—
Total lease cost	$	464	$	1,402

Rent expense for the three and nine months ended September 30, 2018, prior to the adoption of ASU 2016-02 was $407,000 and $1,216,000, respectively.

There were no sale and leaseback transactions, leveraged leases, or lease transactions with related parties during the three or nine months ended September 30, 2019 or 2018.

A maturity analysis of operating lease liabilities and reconciliation of the undiscounted cash flows to the total operating lease liability is as follows (in thousands):

	September 30, 2019
Lease payments due:
2019 (excluding the nine months ended September 30, 2019)	$	382
2020		1,539
2021		1,567
2022		1,453
2023		1,402
2024 and thereafter		8,820
Total undiscounted cash flows		15,163
Discount on cash flows		(2,545	)
Total lease liability	$	12,618

NOTE 5 – FEDERAL HOME LOAN BANK ADVANCES

The Company had outstanding borrowings totaling of $10.0 million and $125.0 million at September 30, 2019 and December 31, 2018, respectively, via various advances. These advances are non-callable; interest payments are due monthly, with principal due at maturity.

The following is a summary of the contractual maturities and average effective rates of outstanding advances (dollars in thousands):

	September 30, 2019					December 31, 2018
Year	Amount		Interest Rates			Amount		Interest Rates
2019	$	—		—		$	125,000		2.48	%
2020		10,000		2.20	%		—		—
2021		—		—			—		—
2022		—		—			—		—
2023		—		—			—		—
Thereafter		—		—			—		—
Total	$	10,000		2.20	%	$	125,000		2.48	%

Advances from the FHLB are collateralized by investment securities with a market value of $4.1 million, FHLB stock and certain commercial and residential real estate mortgage loans totaling $695.3 million under a blanket mortgage collateral agreement.  At September 30, 2019, the amount of available credit from the FHLB totaled $212.4 million.

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NOTE 6 – ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following were changes in accumulated other comprehensive income (loss) by component, net of tax, for the nine months ended September 30, 2019 and 2018 (dollars in thousands):

				Unrealized Gains			Unrealized
	Gains and			and Losses			Losses on
	Losses on			on Available			Securities
	Cash Flow			for Sale			Transferred to
	Hedges			Securities			Held to Maturity			Total
Nine Months Ended September 30, 2019
Beginning Balance	$	(2,636	)	$	(680	)	$	—		$	(3,316	)
Other comprehensive income (loss) before    reclassification, net of tax		325			4,961			—			5,286
Amounts reclassified from accumulated other    comprehensive income (loss), net of tax		(618	)		(80	)		—			(698	)
Net current period other comprehensive income (loss)		(293	)		4,881			—			4,588
Ending Balance	$	(2,929	)	$	4,201		$	—		$	1,272
Nine Months Ended September 30, 2018
Beginning Balance	$	(3,679	)	$	1,162		$	(10	)	$	(2,527	)
Other comprehensive income (loss) before     reclassification, net of tax		1,800			(4,521	)		—			(2,721	)
Amounts reclassified from accumulated other    comprehensive income (loss), net of tax		(642	)		(1	)		10			(633	)
Net current period other comprehensive income (loss)		1,158			(4,522	)		10			(3,354	)
Ending Balance	$	(2,521	)	$	(3,360	)	$	—		$	(5,881	)

The following were significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

													Affected Line Item
Details about Accumulated Other	Three Months Ended September 30,						Nine Months Ended September 30,						in the Statement Where
Comprehensive Income (Loss) Components	2019			2018			2019			2018			Net Income is Presented
Unrealized losses on cash flow hedges	$	(212	)	$	(111	)	$	(436	)	$	(330	)	Interest expense - money market
		(53	)		(108	)		(191	)		(368	)	Interest expense - Federal Home Loan Bank advances
		—			16			9			56		Income tax benefit
	$	(265	)	$	(203	)	$	(618	)	$	(642	)	Net of tax
Unrealized gains (losses) on available-   for-sale securities	$	—		$	(1	)	$	(108	)	$	2		Net gain (loss) on sale of securities
		—			—			28			(1	)	Income tax benefit
	$	—		$	(1	)	$	(80	)	$	1		Net of tax
Unrealized losses on securities   transferred to held-to-maturity	$	—		$	—		$	—		$	14		Interest income - securities
		—			—			—			(4	)	Income tax benefit
	$	—		$	—		$	—		$	10		Net of tax

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NOTE 7 – INCOME TAXES

The Company’s effective tax rate for the three and nine months ended September 30, 2019 was 24.3% and 23.5% compared to 13.2% and 14.1% for the three and nine months ended September 30, 2018.  In March 2016, the FASB issued guidance to simplify several aspects of the accounting for share-based payment award transactions, including income tax consequences. In addition to other changes, the guidance changes the accounting for excess tax benefits and tax deficiencies from generally being recognized in additional paid-in capital to recognition as income tax expense or benefit in the period they occur. The Company adopted the new guidance in the first quarter of 2017. As a result, the Company’s income tax expense was decreased by $23,000 and $54,000 for the three and nine months ended September 30, 2019, respectively, and decreased by $422,000 and $1,062,000 for the three and nine months ended September 30, 2018, respectively.

The effective tax rate compared favorably to the statutory federal rate of 21% and Tennessee excise tax rate of 6.5% primarily due to investments in qualified municipal securities, company owned life insurance, state tax credits, net of the effect of certain non-deductible expenses and the recognition of excess tax benefits related to stock compensation.

NOTE 8 – COMMITMENTS AND CONTINGENCIES

In the normal course of business, the Company has outstanding commitments and contingent liabilities, such as commitments to extend credit and standby letters of credit, which are not included in the accompanying financial statements. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instruments for commitments to extend credit and standby letters of credit is represented by the contractual or notional amount of those instruments. The Company uses the same credit policies in making such commitments as it does for instruments that are included in the balance sheet.

The following table sets forth outstanding financial instruments whose contract amounts represent credit risk as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	Contract or notional amount
	September 30, 2019		December 31, 2018
Financial instruments whose contract amounts represent    credit risk:
Unused commitments to extend credit	$	707,228	$	707,675
Standby letters of credit		10,415		12,273
Total	$	717,643	$	719,948

The Company is party to litigation and claims arising in the normal course of business. Management believes that the liabilities, if any, arising from such litigation and claims as of September 30, 2019, will not have a material impact on the financial statements of the Company.

NOTE 9 – DERIVATIVES

The Company utilizes derivative financial instruments, interest rate swaps and mortgage banking related derivatives, as part of its ongoing efforts to manage its interest rate risk exposure as well as the exposure for its customers.  The notional amount of the interest rate swaps does not represent amounts exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual interest rate swap agreements.

Interest Rate Swaps Designated as Cash Flow Hedges

There were no interest rate swaps designated as cash flow hedges as of September 30, 2019. Forward starting interest rate swaps with notional amounts totaling $20 million as of  December 31, 2018 were designated as cash flow hedges of certain liabilities and were determined to be fully effective during all periods presented. As such, no amount of ineffectiveness was included in net income. Therefore, the aggregate fair value of the swaps is recorded in other liabilities with changes in fair value recorded in other comprehensive income. The Company terminated an interest rate swap during the second quarter of 2019 with a notional amount of $20 million, which resulted in a termination fee of $1.5 million. Cash flow swaps that have been terminated resulting in cash settlement equal to previously unrealized gains or losses are included in accumulated other comprehensive income and are being amortized to net income over the remaining contractual terms of the swaps.

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Summary information about the interest-rate swaps designated as cash flow hedges was as follows (dollars in thousands):

	September 30, 2019		December 31, 2018
Notional amounts	$	—	$	20,000
Weighted average pay rates		—		3.54	%
Weighted average receive rates		—	3 month LIBOR
Weighted average maturity		—	4.5 years
Fair value	$	—	$	(836	)
Amount of unrealized loss recognized in accumulated    other comprehensive income, net of tax	$	—	$	(617	)

Pursuant to its interest rate swap agreements, the Company pledged collateral to the counterparties in the form of investment securities with a market value of $2.0 million at December 31, 2018. There was no collateral posted from the counterparties to the Company as of September 30, 2019.

Other Interest Rate Swaps

The Company also enters into swaps to facilitate customer transactions and meet their financing needs.  Upon entering into these transactions the Company enters into offsetting positions with large U.S. financial institutions in order to minimize risk to the Company. A summary of the Company’s customer related interest rate swaps was as follows (dollars in thousands):

	September 30, 2019					December 31, 2018
	Notional		Estimated			Notional		Estimated
	amount		fair value			amount		fair value
Interest rate swap agreements:
Pay fixed/receive variable swaps	$	27,487	$	(905	)	$	29,126	$	24
Pay variable/receive fixed swaps		27,487		905			29,126		(24	)
Total	$	54,974	$	—		$	58,252	$	—

Mortgage Banking Derivatives

The Company enters into various derivative agreements with customers in the form of interest-rate lock commitments which are commitments to originate mortgage loans whereby the interest rate on the loan is determined prior to funding and the customers have locked into that interest rate. The derivatives are valued using a model that utilizes market interest rates and other unobservable inputs. Changes in the fair value of these commitments due to fluctuations in interest rates that are to be originated to our loans held for sale portfolio are economically hedged through the use of forward sale commitments of mortgage-backed securities. The gains and losses arising from this derivative activity are reflected in current period earnings under mortgage banking income. Interest rate lock commitments are valued using a model with significant unobservable market parameters. Forward sale commitments are valued based on quoted prices for similar assets in an active market with inputs that are observable.

The net gains (losses) relating to mortgage banking derivative instruments included in mortgage banking income were as follows (dollars in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Mortgage loan interest rate lock commitments	$	214		$	807
Mortgage-backed securities forward sales commitments		(311	)		(664	)
Total	$	(97	)	$	143

There were no gains or losses relating to mortgage banking derivative instruments for the three or nine months ended September 30, 2018.

23

The amount and fair value of mortgage banking derivatives included in the consolidated balance sheets was as follows (dollars in thousands):

	September 30, 2019					December 31, 2018
	Notional		Estimated			Notional		Estimated
	amount		fair value			amount		fair value
Included in other assets:
Mortgage loan interest rate lock commitments	$	67,565	$	807		$	—	$	—
Included in other liabilities:
Mortgage-backed securities forward sales commitments	$	53,500	$	(83	)	$	—	$	—

NOTE 10 - STOCK OPTIONS AND RESTRICTED SHARES

During 2008, the board of directors of the Bank approved the CapStar Bank 2008 Stock Incentive Plan. Following the formation of CapStar Financial Holdings, Inc. in 2016, and in connection with the Share Exchange, the outstanding awards of restricted stock and stock options under the CapStar Bank 2008 Stock Incentive Plan were exchanged for similar awards of restricted stock and stock options issued by CapStar Financial Holdings, Inc. under the CapStar Financial Holdings, Inc. Stock Incentive Plan (the “Plan”), which the board of directors adopted in 2016. The Stock Incentive Plan provides for the grant of stock-based incentives, including stock options, restricted stock units, performance awards and restricted stock, to employees, directors and service providers that are subject to forfeiture until vesting conditions have been satisfied by the award recipient under the terms of the award.  The Plan is intended to help align the interests of employees and our shareholders and reward our employees for improved Company performance.  The Plan reserved 1,569,475 shares of stock for issuance of stock incentives. In April 2018 the board of directors reserved an additional 400,000 shares of stock for issuance of stock incentives.  Stock incentives include both restricted share and stock option grants.  Total shares issuable under the plan were 357,852 at September 30, 2019.

The Company has recognized stock-based compensation expense, within salaries and employee benefits for employees, and within other non-interest expense for directors, in the consolidated statements of income as follows (dollars in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2019			2018			2019			2018
Stock-based compensation expense before income taxes	$	351		$	310		$	1,035		$	940
Less: deferred tax benefit		(92	)		(81	)		(271	)		(246	)
Reduction of net income	$	259		$	229		$	764		$	694

Restricted Shares

Compensation expense is recognized over the vesting period of the awards based on the fair value of the stock at the issue date. The fair value of each restricted stock grant is based on valuations performed by independent consultants. The recipients have the right to vote and receive dividends but cannot sell, transfer, assign, pledge, hypothecate, or otherwise encumber the restricted stock until the shares have vested. Restricted shares fully vest on the third anniversary of the grant date.  A summary of the changes in the Company’s nonvested restricted shares for the nine months ended September 30, 2019 follows:

				Weighted
				Average
	Restricted			Grant Date
Nonvested Shares	Shares			Fair Value
Nonvested at beginning of period		157,616		$	17.00
Granted		31,683			15.86
Vested		(64,178	)		15.17
Forfeited		(16,635	)		17.87
Nonvested at end of period		108,486		$	17.62

As of September 30, 2019, there was $2.2 million of unrecognized compensation cost related to nonvested shares granted under the Plan.  The cost is expected to be recognized over a weighted-average period of 1.7 years.  The total fair value of shares vested during the nine months ended September 30, 2019 and 2018 was $1.0 million and $1.9 million, respectively.

24

Stock Options

Option awards are generally granted with an exercise price equal to the fair value of the Company’s common stock at the date of grant.  Option awards generally have a four year vesting period and a ten year contractual term.

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model that uses the assumptions noted in the table below. Expected volatility is based on historical volatilities of the Company’s common stock. The expected term of options granted was calculated using the “simplified” method for plain vanilla options. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. There were no options granted in 2018.  The Company granted 50,000 options during 2019.

The fair value of options granted during 2019 was determined using the following weighted average assumptions as of the grant date.

	2019
Dividend yield		1.35	%
Expected term (in years)		6.50
Expected stock price volatility		29.55	%
Risk-free interest rate		2.25	%

A summary of the activity in stock options for the nine months ended September 30, 2019 follows:

						Weighted
				Weighted		Average
				Average		Remaining
				Exercise		Contractual
	Shares			Price		Term (years)
Outstanding at beginning of period		507,903		$	8.66
Granted		50,000			14.84
Exercised		(257,954	)		7.34
Forfeited or expired		—			—
Outstanding at end of period		299,949		$	10.83		5.0
Fully vested and expected to vest		299,668		$	10.83		5.0
Exercisable at end of period		243,699		$	9.95		4.0

Information related to stock options during each year follows:

	2019		2018
Intrinsic value of options exercised	$	2,208,930	$	4,282,055
Cash received from option exercises		1,723,704		5,144,090
Tax benefit realized from option exercises		37,468		1,119,329
Weighted average fair value of options granted		5.35		—

As of September 30, 2019, there was $0.2 million of unrecognized compensation cost related to nonvested stock options granted under the Plan.  The cost is expected to be recognized over a weighted-average period of 2.6 years.

NOTE 11 – REGULATORY CAPITAL REQUIREMENTS

The Company and the Bank are subject to regulatory capital requirements administered by the Federal Reserve and the Bank is also subject to the regulatory capital requirements of the Tennessee Department of Financial Institutions. Failure to meet capital requirements can initiate certain mandatory – and possibly additional discretionary – actions by regulators that could, in that event, have a material adverse effect on the institutions’ financial statements. The relevant regulations require the Company and the Bank to meet specific capital adequacy guidelines that involve quantitative measures of their assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting principles. The capital classifications of the Company and the Bank are also subject to qualitative judgments by their regulators about components, risk weightings, and other factors. Those qualitative judgments could also affect the capital status of the Company and the Bank and the amount of dividends the Company and the Bank may distribute. The final rules implementing the Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Bank on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital. Management believes as of September 30, 2019, the Company and the Bank met all regulatory capital adequacy requirements to which they are subject.

25

The Company’s and the Bank’s capital amounts and ratios as of September 30, 2019 and December 31, 2018 are presented in the following table (dollars in thousands).

	Actual					Minimum capital requirement (1)					Minimum to be well-capitalized (2)
	Amount		Ratio			Amount		Ratio			Amount		Ratio
At September 30, 2019:
Total capital to risk-weighted assets:
CapStar Financial Holdings, Inc.	$	232,896		13.46	%	$	138,398		8.00	%	N/A		N/A
CapStar Bank		219,513		12.69			138,351		8.00		$	172,939		10.00
Tier I capital to risk-weighted assets:
CapStar Financial Holdings, Inc.		219,889		12.71			103,799		6.00		N/A		N/A
CapStar Bank		206,506		11.94			103,763		6.00			138,351		8.00
Common equity Tier 1 capital to risk weighted    assets:
CapStar Financial Holdings, Inc.		219,889		12.71			77,849		4.50		N/A		N/A
CapStar Bank		190,006		10.99			77,822		4.50			112,410		6.50
Tier I capital to average assets:
CapStar Financial Holdings, Inc.		219,889		11.24			78,232		4.00		N/A		N/A
CapStar Bank		206,506		10.56			78,206		4.00			97,757		5.00
At December 31, 2018:
Total capital to risk-weighted assets:
CapStar Financial Holdings, Inc.	$	222,030		12.84	%	$	138,336		8.00	%	N/A		N/A
CapStar Bank		201,972		11.68			138,294		8.00		$	172,868		10.00
Tier I capital to risk-weighted assets:
CapStar Financial Holdings, Inc.		209,738		12.13			103,752		6.00		N/A		N/A
CapStar Bank		189,680		10.97			103,721		6.00			138,294		8.00
Common equity Tier 1 capital to risk weighted    assets:
CapStar Financial Holdings, Inc.		200,738		11.61			77,814		4.50		N/A		N/A
CapStar Bank		173,180		10.02			77,791		4.50			112,364		6.50
Tier I capital to average assets:
CapStar Financial Holdings, Inc.		209,738		11.06			75,867		4.00		N/A		N/A
CapStar Bank		189,680		10.01			75,828		4.00			94,785		5.00

(1) For the calendar year 2019, the Company must maintain a capital conservation buffer of Tier 1 common equity capital in excess of minimum risk-based capital ratios by at least 2.5% to avoid limits on capital distributions and certain discretionary bonus payments to executive officers and similar employees.

(2) For the Company to be well-capitalized, the Bank must be well-capitalized and the Company must not be subject to any written agreement, order, capital directive, or prompt corrective action directive issued by the Federal Reserve to meet and maintain a specific capital level for any capital measure.

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NOTE 12 – EARNINGS PER SHARE

The following is a summary of the basic and diluted earnings per share calculation for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands, except share data):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Basic net income per share calculation:
Numerator – Net income	$	6,466	$	3,656	$	17,001	$	10,363
Denominator – Average common shares outstanding		17,741,778		12,040,229		17,729,518		11,851,476
Basic net income per share	$	0.36	$	0.30	$	0.96	$	0.87
Diluted net income per share calculation:
Numerator – Net income	$	6,466	$	3,656	$	17,001	$	10,363
Denominator – Average common shares outstanding		17,741,778		12,040,229		17,729,518		11,851,476
Dilutive shares contingently issuable		790,701		1,073,546		940,762		1,201,282
Average diluted common shares outstanding		18,532,479		13,113,775		18,670,280		13,052,758
Diluted net income per share	$	0.35	$	0.28	$	0.91	$	0.79

NOTE 13 – FAIR VALUE

Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:

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

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

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

The Bank used the following methods and significant assumptions to estimate fair value:

Investment Securities: The fair values for investment securities are determined by quoted market prices, if available (Level 1). For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2), using matrix pricing. Matrix pricing is a mathematical technique commonly used to price debt securities that are not actively traded and, values debt securities by relying on quoted prices for the specific securities and the securities’ relationship to other benchmark quoted securities (Level 2 inputs). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows or other market indicators (Level 3). See below for additional discussion of Level 3 valuation methodologies and significant inputs. The fair values of all securities are determined from third party pricing services without adjustment.

Other Real Estate Owned: Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals which are updated no less frequently than annually. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach with data from comparable properties. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Appraisals may be adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and/or management’s expertise and knowledge of the collateral. Such adjustments result in a Level 3 classification of the inputs for determining fair value. Real estate owned properties are evaluated on a quarterly basis for additional impairment and adjusted accordingly.  The Company had no other real estate owned carried at fair value as of September 30, 2019 or December 31, 2018.

Loans Held For Sale: Loans held for sale are carried at either fair value, if elected, or the lower of cost or fair value on a pool-level basis. Origination fees and costs for loans held for sale recorded at lower of cost or market are capitalized in the basis of the loan and are included in the calculation of realized gains and losses upon sale.  Origination fees and costs are recognized in earnings at the time of origination for loans held for sale that are recorded at fair value.  Fair value is determined using quoted prices for similar assets, adjusted for specific attributes of that loan or other observable market data, such as outstanding commitments from third party investors (Level 2).  There were no loans held for sale carried at fair value at December 31, 2018.

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Impaired Loans: The fair value of impaired loans with specific allocations of the allowance for loan losses is generally based on recent appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available for similar loans and collateral underlying such loans. Such adjustments result in a Level 3 classification of the inputs for determining fair value. Collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Impaired loans are evaluated on at least a quarterly basis for additional impairment and adjusted in accordance with the loan policy.

Derivatives-Interest Rate Swaps: The fair values of derivatives are based on valuation models using observable market data as of the measurement date (Level 2). The Bank’s derivatives are traded in an over-the-counter market where quoted market prices are not always available. Therefore, the fair values of derivatives are determined using quantitative models that utilize multiple market inputs. The inputs will vary based on the type of derivative, but could include interest rates, prices and indices to generate continuous yield or pricing curves, prepayment rates, and volatility factors to value the position. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services.  The fair values of all interest rate swaps are determined from third party pricing services without adjustment.

Derivatives-Mortgage Loan Interest Rate Lock Commitments:  Interest rate lock commitments that relate to the origination of mortgage loans that will be held for sale are recorded at fair value, determined as the amount that would be required to settle each derivative instrument at the balance sheet date. The fair value of the interest rate lock commitment is derived from the fair value of related mortgage loans, which is based on observable market data and includes the expected net future cash flows related to servicing of the loans.  In estimating the fair value of an interest rate lock commitment, the Company assigns a probability to the interest rate lock commitment based on an expectation that it will be exercised and the loan will be funded (a “pull through” rate).  The expected pull through rates are applied to the fair value of the unclosed mortgage pipeline, resulting in a Level 3 fair value classification. The pull through rate is a statistical analysis of our actual rate lock fallout history to determine the sensitivity of the residential mortgage loan pipeline compared to interest rate changes and other deterministic values. New market prices are applied based on updated loan characteristics and new fallout ratios (i.e., the inverse of the pull through rate) are applied accordingly. Significant increases (decreases) in the pull through rate in isolation result in a significantly higher (lower) fair value measurement. Changes to the fair value of interest rate lock commitments are recognized based on interest rate changes, changes in the probability that the commitment will be exercised, and the passage of time.

Derivatives-Mortgage-Backed Securities Forward Sales Commitments: The Company utilizes mortgage-backed securities forward sales commitments to hedge mortgage loan interest rate lock commitments.  Mortgage-backed securities forward sales commitments are recorded at fair value based on quoted prices for similar assets in an active market with inputs that are observable, resulting in a Level 2 fair value classification.

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Assets and liabilities measured at fair value on a recurring basis are summarized below (dollars in thousands):

	Fair value measurements at September 30, 2019
				Quoted prices
				in active		Significant
				markets for		other			Significant
				identical		observable			unobservable
	Carrying			assets		inputs			inputs
	Value			(Level 1)		(Level 2)			(Level 3)
Assets:
Securities available-for-sale:
U.S. government-sponsored agencies	$	9,230		$	—	$	9,230		$	—
Obligations of states and political subdivisions		51,443			—		51,443			—
Mortgage-backed securities-residential		129,691			—		129,691			—
Asset-backed securities		3,233			—		3,233			—
Other debt securities		9,903			—		9,903			—
Loans held for sale		45,988			—		45,988			—
Derivative assets:
Non-hedging derivatives:
Interest rate swaps - customer related		909			—		909			—
Mortgage loan interest rate lock commitments		807			—		—			807
Liabilities:
Derivative liabilities:
Non-hedging derivatives:
Interest rate swaps - customer related		(909	)		—		(909	)		—
Mortgage-backed securities forward sales commitments		83			—		83			—

	Fair value measurements at December 31, 2018
				Quoted prices
				in active		Significant
				markets for		other			Significant
				identical		observable			unobservable
	Carrying			assets		inputs			inputs
	Value			(Level 1)		(Level 2)			(Level 3)
Assets:
Securities available-for-sale:
U.S. government-sponsored agencies	$	10,706		$	—	$	10,706		$	—
Obligations of states and political subdivisions		61,926			—		61,926			—
Mortgage-backed securities-residential		144,158			—		144,158			—
Asset-backed securities		15,284			—		15,284			—
Other debt securities		11,734			—		11,734			—
Derivative assets:
Non-hedging derivatives:
Interest rate swaps - customer related		494			—		494			—
Liabilities:
Derivative liabilities:
Cash flow hedges:
Interest rate swaps - cash flow hedges		(836	)		—		(836	)		—
Non-hedging derivatives:
Interest rate swaps - customer related		(494	)		—		(494	)		—

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The table below presents a reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Mortgage Loan Interest Rate
	Lock Commitments
	2019		2018
Balance of recurring Level 3 assets at January 1st	$	—	$	—
Total gains or losses for the period:
Included in mortgage banking income		807		—
Balance of recurring Level 3 assets at September 30th	$	807	$	—

The following table presents quantitative information about recurring Level 3 fair value measurements at September 30, 2019 (dollars in thousands).  There were no Level 3 fair value measurements at December 31, 2018.

					Range
	Fair		Valuation		(Weighted-
September 30, 2019	Value		Technique(s)	Unobservable Input(s)	Average)
Assets:
Non-hedging derivatives:
Mortgage loan interest rate lock commitments	$	807	Consensus pricing	Origination pull-through rate	69% - 98% (85%)

There were no assets measured at fair value on a nonrecurring basis at September 30, 2019 and December 31, 2018.

Fair Value of Financial Instruments

The carrying value and estimated fair values of the Bank’s financial instruments at September 30, 2019 and December 31, 2018 were as follows (dollars in thousands):

	September 30, 2019				December 31, 2018
	Carrying				Carrying				Fair value
	amount		Fair value		amount		Fair value		level of input
Financial assets:
Cash and due from banks, interest-bearing deposits in    financial institutions	$	154,021	$	154,021	$	94,681	$	94,681	Level 1
Federal funds sold		—		—		10,762		10,762	Level 1
Securities available-for-sale		203,500		203,500		243,808		243,808	Level 2
Securities held-to-maturity		3,319		3,412		3,734		3,785	Level 2
Loans held for sale		129,613		131,156		57,618		58,596	Level 2
Restricted equity securities		13,900	N/A			12,038	N/A		N/A
Loans		1,411,768		1,405,664		1,429,794		1,442,082	Level 3
Accrued interest receivable		5,780		5,780		5,964		5,964	Level 2
Other assets		35,523		35,523		34,489		34,489	Level 2 / Level 3
Financial liabilities:
Deposits		1,731,763		1,733,122		1,570,008		1,572,880	Level 3
Federal Home Loan Bank advances		10,000		10,030		125,000		126,548	Level 2
Other liabilities		1,552		1,552		2,753		2,753	Level 3

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

(a) Cash and Due from Banks, Interest-Bearing Deposits in Financial Institutions

For these short‑term instruments, the carrying amount is a reasonable estimate of fair value.

(b) Federal Funds Sold

Federal funds sold clear on a daily basis. For this reason, the carrying amount is a reasonable estimate of fair value.

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(c) Restricted Equity Securities

It is not practical to determine the fair value of restricted securities due to restrictions placed on their transferability.

(d) Loans

In accordance with the adoption of ASU 2016-01, the fair value of loans is measured using an exit price notion.  Fair values for impaired loans are estimated using discounted cash flow models or based on the fair value of the underlying collateral.

(e) Accrued Interest Receivable

The carrying amounts of accrued interest approximate fair value.

(f) Other Assets

Included in other assets are bank owned life insurance and certain interest rate swap agreements. The fair values of interest rate swap agreements are based on independent pricing services that utilize pricing models with observable market inputs. For bank owned life insurance, the carrying amount is based on the cash surrender value and is a reasonable estimate of fair value.

(g) Deposits

The fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date. The fair value of certificates of deposit is estimated by discounted cash flow models, using current market interest rates offered on certificates with similar remaining maturities.

(h) Federal Home Loan Bank Advances

The fair value of fixed rate Federal Home Loan Bank Advances is estimated using discounted cash flow models, using current market interest rates offered on certificates, advances and other borrowings with similar remaining maturities.

(i) Other Liabilities

Included in other liabilities are accrued interest payable and certain interest rate swap agreements. The fair values of interest rate swap agreements are based on independent pricing services that utilize pricing models with observable market inputs.  The carrying amounts of accrued interest approximate fair value.

(j) Off-Balance Sheet Instruments

Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing.  The fair value of commitments is not material.

(k) Limitations

Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instruments. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Bank’s entire holdings of a particular instrument. Because no market exists for a significant portion of the Bank’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

Fair value estimates are based on estimating on and off‑balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. For example, fixed assets are not considered financial instruments and their value has not been incorporated into the fair value estimates. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

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

The following is a discussion of our financial condition at September 30, 2019 and December 31, 2018 and our results of operations for the three and nine months ended September 30, 2019 and 2018.  The purpose of this discussion is to focus on information about our financial condition and results of operations which is not otherwise apparent from the consolidated financial statements.  The following discussion and analysis should be read along with our consolidated financial statements and the related notes included elsewhere in this Report and our Annual Report on Form 10-K for the year ended December 31, 2018.  Annualized results for interim periods may not be indicative of results for the full year or future periods.  In addition to historical information, this discussion and analysis contains forward-looking statements that involve risks, uncertainties and assumptions that could cause actual results to differ materially from our current expectations.  Factors that could cause such differences are discussed in the section entitled “Cautionary Note Regarding Forward-Looking Statements” in this Report and the section entitled “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2018. We assume no obligation to update any of these forward-looking statements except to the extent required by applicable law.

The following discussion and analysis pertains to our historical results on a consolidated basis.  However, because we conduct all of our material business operations through our wholly owned subsidiary, CapStar Bank, the following discussion and analysis relates to activities primarily conducted at the subsidiary level.

All dollar amounts in the tables in this section are in thousands of dollars, except per share data or when otherwise specifically noted.

Overview

The third quarter of 2019 resulted in $0.35 diluted net income per share of common stock, an increase of 25.1% compared to the third quarter of 2018.  Annualized return on average assets was 1.28% for the third quarter of 2019 compared to 1.02% for the same period in 2018.

For the nine months ended September 30, 2019, diluted net income per share of common stock was $0.91, an increase of 14.7% compared to the same period in 2018. Annualized return on average assets was 1.14% for the nine months ended September 30, 2019 compared to 1.00% for the same period in 2018.

At September 30, 2019, loans decreased to $1.41 billion, as compared to $1.43 billion at December 31, 2018.  Total deposits increased to $1.73 billion at September 30, 2019 from $1.57 billion at December 31, 2018.

The comparability of our financial condition and performance has been impacted by our acquisition of Athens Bancshares Corporation (“Athens”) which we completed in 2018.

Our primary revenue sources are net interest income and fees from various financial services provided to customers. Net interest income is the difference between interest income earned on loans, investment securities and other interest earning assets less interest expense on deposit accounts and other interest bearing liabilities. Loan volume and interest rates earned on those loans are critical to overall profitability. Similarly, deposit volume is crucial to funding loans, and rates paid on deposits directly impact profitability. Business volumes are influenced by competition, new business acquisition efforts and economic factors including market interest rates, business spending and consumer confidence.

Net interest income increased $5.6 million, or 48.6%, for the three months ended September 30, 2019 compared to the same period in 2018 and increased $17.2 million, or 50.6%, for the nine months ended September 30, 2019 compared to the same period in 2018.  Net interest margin increased to 3.66% for the three months ended September 30, 2019, compared with 3.35% for the same period of 2018 and increased to 3.70% for the nine months ended September 30, 2019, compared with 3.40% for the same period of 2018.  The positive effects of increased yields on earning assets were partially offset by the negative effects of increasing deposit costs.

In response to the assessment of risk in the loan portfolio, including net loan growth and charge-offs, we recorded a $(0.1) million provision for loan losses for the third quarter of 2019 compared to $0.5 million during the comparable period of 2018.  Provision for loan losses for the nine months ended September 30, 2019 and 2018 were $0.8 million and $1.3 million, respectively. The provision for loan losses represents a charge to earnings necessary to establish an allowance for loan losses that, in management’s evaluation, is adequate to provide coverage for the estimated probable inherent losses on outstanding loans. Our allowance for loan losses at September 30, 2019 was 0.91% of total loans, compared with 0.85% of total loans at December 31, 2018.

Total non-interest income for the third quarter of 2019 increased $3.6 million, or 110.9%, compared with the same period in 2018, and comprised 23% of total revenues.  For the nine months ended September 30, 2019, total non-interest income increased $9.5 million, or 104.5%, compared with the same period in 2018, and comprised 21% of total revenues.  These increases were primarily the result of higher mortgage banking income, Tri-Net fees and interchanges fees resulting from our acquisition of Athens.

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As we grew our team and expanded into East Tennessee with the Athens acquisition, total non-interest expense for the three and ninemonths ended September 30, 2019 increased $5.5 million, or 54.2%, and $17.1 million, or 57.6%, respectively, compared with the same periods in 2018. Included in noninterest expense for the three and nine months ended September 30, 2019 were $0.2 million and $2.5 million, respectively, of pretax merger related charges related to the acquisition of Athens compared to $0.5 million and $0.9 million for the three and nine months ended September 30, 2018, respectively.Our efficiency ratio for the three months ended September 30, 2019was 64.9% compared to 68.2% for the same period in 2018.  For the nine months ended September 30, 2019 our efficiency ratio was 67.0% compared to 68.9% for the same period in 2018.

Our effective tax rate for the three and nine months ended September 30, 2019 was 24.3% and 23.5%, respectively, compared to 13.2% and 14.1% for the same periods in 2018.  The increase in the effective tax rate is largely the result of the decreasing ratio of excess tax benefits from stock compensation to income before income taxes.

Tangible common equity, a non-GAAP measure, is a measure of a company's capital which is useful in evaluating the quality and adequacy of capital. The ratio of tangible common equity to total tangible assets was 11.23% as of September 30, 2019, compared with 10.39% at December 31, 2018.  See “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures” for details on reconciliations to the most directly comparable U.S. GAAP measures.

The following sections provide more details on subjects presented in this overview.

(a) Results of Operations

The following is a summary of our results of operations:

						2019 - 2018							2019 - 2018
	Three Months Ended					Percent			Nine Months Ended				Percent
	September 30,					Increase			September 30,				Increase
	2019			2018		(Decrease)			2019		2018		(Decrease)
Interest income	$	23,216		$	15,782		47.1	%	$	69,341	$	44,880		54.5	%
Interest expense		6,060			4,239		42.9	%		18,175		10,904		66.7	%
Net interest income		17,156			11,543		48.6	%		51,166		33,976		50.6	%
Provision for loan losses		(125	)		481		(126.0	)%		761		1,328		(42.7	)%
Net interest income after provision for loan losses		17,281			11,062		56.2	%		50,405		32,648		54.4	%
Noninterest income		6,788			3,218		110.9	%		18,555		9,072		104.5	%
Noninterest expense		15,531			10,070		54.2	%		46,728		29,655		57.6	%
Net income before income taxes		8,538			4,210		102.8	%		22,232		12,065		84.3	%
Income tax expense		2,072			554		274.1	%		5,231		1,702		207.4	%
Net income	$	6,466		$	3,656		76.9	%	$	17,001	$	10,363		64.1	%
Basic net income per share of common stock	$	0.36		$	0.30		20.0	%	$	0.96	$	0.87		9.7	%
Fully diluted net income per share of common stock	$	0.35		$	0.28		25.1	%	$	0.91	$	0.79		14.7	%

Annualized return on average assets and annualized return on average shareholders’ equity were 1.28% and 9.63%, respectively, for the third quarter of 2019, compared with 1.02% and 9.28%, respectively, for the same period in 2018.

Annualized return on average assets and annualized return on average shareholders’ equity were 1.14% and 8.69%, respectively, for the nine months ended September 30, 2019, compared with 1.00% and 9.11%, respectively, for the same period in 2018.

Net Interest Income

The largest component of our net income is net interest income – the difference between the income earned on interest-earning assets and the interest paid on deposits and borrowed funds used to support our assets. Net interest income divided by total average interest-earning assets represents our net interest margin. The major factors that affect net interest income and net interest margin are changes in volumes, the yield on interest-earning assets and the cost of interest-bearing liabilities. Our margin can also be affected by economic conditions, the competitive environment, loan demand and deposit flow. Our ability to respond to changes in these factors by using effective asset-liability management techniques is critical to maintaining the stability of the net interest margin and our net interest income.

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The following tables set forth the amount of our average balances, interest income or interest expense for each category of interest-earning assets and interest-bearing liabilities and the average interest rate for interest-earning assets and interest-bearing liabilities, net interest spread and net interest margin for the three and ninemonths ended September 30, 2019 and 2018:

	For the Three Months Ended September 30,
	2019							2018
	Average Outstanding Balance		Interest Income/ Expense		Average Yield/ Rate			Average Outstanding Balance		Interest Income/ Expense		Average Yield/ Rate
Interest-Earning Assets
Loans (1)	$	1,445,755	$	19,955		5.48	%	$	1,070,060	$	13,484		5.00	%
Loans held for sale		101,835		1,050		4.09	%		54,701		683		4.96	%
Securities:
Taxable investment securities (2)		160,528		1,211		3.02	%		154,570		1,083		2.80	%
Investment securities exempt from    federal income tax (3)		50,932		354		3.52	%		41,461		248		3.03	%
Total securities		211,460		1,565		3.14	%		196,031		1,331		2.85	%
Cash balances in other banks		110,690		645		2.31	%		50,844		267		2.08	%
Funds sold		144		1		3.46	%		2,475		17		2.73	%
Total interest-earning assets		1,869,884		23,216		4.95	%		1,374,111		15,782		4.58	%
Noninterest-earning assets		136,066							47,762
Total assets	$	2,005,950						$	1,421,873
Interest-Bearing Liabilities
Interest-bearing deposits:
Interest-bearing transaction accounts	$	527,759		2,102		1.58	%	$	318,586		1,146		1.43	%
Savings and money market deposits		494,183		1,944		1.56	%		391,107		1,409		1.43	%
Time deposits		349,046		1,887		2.14	%		203,841		985		1.92	%
Total interest-bearing deposits		1,370,988		5,933		1.72	%		913,534		3,540		1.54	%
Borrowings and repurchase agreements		12,174		127		4.12	%		109,891		699		2.53	%
Total interest-bearing liabilities		1,383,162		6,060		1.74	%		1,023,425		4,239		1.64	%
Noninterest-bearing deposits		333,885							233,739
Total funding sources		1,717,047							1,257,164
Noninterest-bearing liabilities		22,462							8,445
Shareholders’ equity		266,441							156,264
Total liabilities and shareholders’ equity	$	2,005,950						$	1,421,873
Net interest spread (4)						3.21	%						2.93	%
Net interest income/margin (5)			$	17,156		3.66	%			$	11,543		3.35	%

(1) Average loan balances include nonaccrual loans. Interest income on loans includes amortization of deferred loan fees, net of deferred loan costs.

(2) Taxable investment securities include restricted equity securities.

(3) Yields on tax exempt securities are shown on a tax equivalent basis.

(4) Net interest spread is the average yield on total interest-earning assets minus the average rate on total interest-bearing liabilities.

(5) Net interest margin is annualized net interest income calculated on a tax equivalent basis divided by total average interest-earning assets for the period.

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	For the Nine Months Ended September 30,
	2019							2018
	Average Outstanding Balance		Interest Income/ Expense		Average Yield/ Rate			Average Outstanding Balance		Interest Income/ Expense		Average Yield/ Rate
Interest-Earning Assets
Loans (1)	$	1,458,828	$	59,673		5.47	%	$	1,032,114	$	38,058		4.93	%
Loans held for sale		86,895		2,923		4.50	%		60,312		2,139		4.74	%
Securities:
Taxable investment securities (2)		176,951		4,124		3.11	%		155,331		3,164		2.72	%
Investment securities exempt from    federal income tax (3)		53,360		1,093		3.46	%		43,722		784		3.03	%
Total securities		230,311		5,217		3.19	%		199,053		3,948		2.78	%
Cash balances in other banks		84,333		1,502		2.38	%		49,930		679		1.82	%
Funds sold		990		26		3.52	%		2,967		56		2.50	%
Total interest-earning assets		1,861,357		69,341		5.00	%		1,344,376		44,880		4.48	%
Noninterest-earning assets		138,252							45,671
Total assets	$	1,999,609						$	1,390,047
Interest-Bearing Liabilities
Interest-bearing deposits:
Interest-bearing transaction accounts	$	476,755		5,523		1.55	%	$	294,994		2,793		1.27	%
Savings and money market deposits		487,743		5,445		1.49	%		399,698		3,827		1.28	%
Time deposits		380,566		5,917		2.08	%		190,735		2,468		1.73	%
Total interest-bearing deposits		1,345,064		16,885		1.68	%		885,427		9,088		1.37	%
Borrowings and repurchase agreements		57,472		1,290		3.00	%		98,033		1,816		2.48	%
Total interest-bearing liabilities		1,402,536		18,175		1.73	%		983,460		10,904		1.48	%
Noninterest-bearing deposits		312,505							246,991
Total funding sources		1,715,041							1,230,451
Noninterest-bearing liabilities		22,953							7,542
Shareholders’ equity		261,615							152,054
Total liabilities and shareholders’ equity	$	1,999,609						$	1,390,047
Net interest spread (4)						3.27	%						3.00	%
Net interest income/margin (5)			$	51,166		3.70	%			$	33,976		3.40	%

(1) Average loan balances include nonaccrual loans. Interest income on loans includes amortization of deferred loan fees, net of deferred loan costs.

(2) Taxable investment securities include restricted equity securities.

(3) Yields on tax exempt securities are shown on a tax equivalent basis.

(4) Net interest spread is the average yield on total interest-earning assets minus the average rate on total interest-bearing liabilities.

(5) Net interest margin is annualized net interest income calculated on a tax equivalent basis divided by total average interest-earning assets for the period.

Our net interest margin was 3.66% and 3.35% for the third quarter of 2019 and 2018, respectively.  For the nine months ended September 30, 2019 and 2018, our net interest margin was 3.70% and 3.40%, respectively.  The increase in net interest margin for both periods was primarily due to rising yields on earning assets partially offset by rising deposit costs and our acquisition of Athens.  

For the third quarter of 2019 and 2018, average loan yields increased from 5.00% to 5.48% which was primarily driven by increases in short-term interest rate indexes affecting the variable rate portion of our loan portfolio and the acquisition of Athens, partially offset by competitive pricing pressures.  For the nine months ended September 30, 2019 and 2018, average loan yields increased from 4.93% to 5.47%. From December 31, 2017 to September 30, 2019, the LIBOR – 1 month interest rate increased from 1.56% to 2.04%.  Approximately 53% of our loan portfolio is variable in nature.

Average loans for the three and nine months ended September 30, 2019 increased 35.1% and 41.3%, respectively compared to the similar periods in 2018 as a result of the Athens acquisition, adding new bankers in the Nashville MSA and continued focus on attracting new clients.

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For the third quarter of 2018 and 2019, average security yields increased from 2.85% to 3.14% and from 2.78% to 3.19% for the nine months ended September 30, 2018 and 2019, respectively, primarily due to increases in the LIBOR rate on the variable rate portion of our securities portfolio.  The resulting yield on average interest-earning assets increased 37 basis points for the third quarter of 2019 compared to the similar period in 2018 and 52 basis points for the nine months ended September 30, 2019 compared to the similar period of 2018.

We funded our growth in loans through an increase in funding sources of 36.6% and 39.4% for the three and nine months ended September 30, 2019 compared to the similar periods in 2018. The primary driver of our increased funding sources was growth in our average interest-bearing deposits of 50.1% and 51.9% for the three and nine months ended September 30, 2019 compared to the similar periods in 2018 which was largely driven by the acquisition.  Average non-interest bearing deposits increased 42.8% and 26.5% for the three and nine months ended September 30, 2019 compared to the similar period in 2018.

The average rate paid on interest-bearing liabilities was 1.74% for the third quarter of 2019, as compared to 1.64% for the same period in 2018. For the nine months ended September 30, 2019 and 2018, the average rate paid on interest-bearing liabilities was 1.73% and 1.48%, respectively.  These increases were due to the increases in the Fed Funds rate which increased from 1.33% at December 31, 2017 to 1.90% at September 30, 2019. We passed along a portion of this 57 basis point rate increase to our clients.

Asset/Liability Management and Interest Rate Risk

Managing interest rate risk is fundamental for the financial services industry. By considering both on and off-balance sheet financial instruments, management evaluates interest rate sensitivity while attempting to optimize net interest income within the constraints of prudent capital adequacy, liquidity needs, market opportunities and customer requirements.

Interest Rate Simulation Sensitivity Analysis

We use earnings at risk, or EAR, simulations to assess the impact of changing rates on earnings under a variety of scenarios and time horizons. The simulation model is designed to reflect the dynamics of interest earning assets, interest bearing liabilities and off-balance sheet financial instruments.  These simulations utilize both instantaneous and parallel changes in the level of interest rates, as well as non-parallel changes such as changing slopes and twists of the yield curve.  Static simulation models are based on current exposures and assume a constant balance sheet with no new growth.  Dynamic simulation models are also utilized that rely on detailed assumptions regarding changes in existing lines of business, new business, and changes in management and client behavior.  By estimating the effects of interest rate increases and decreases, the model can reveal approximate interest rate risk exposure. The simulation model is used by management to gauge approximate results given a specific change in interest rates at a given point in time. The model is therefore a tool to indicate earnings trends in given interest rate scenarios and does not indicate actual expected results.

At September 30, 2019, our EAR static simulation results indicated that our balance sheet is asset sensitive to parallel shifts in interest rates. This indicates that our assets generally reprice faster than our liabilities, which results in a favorable impact to net interest income when market interest rates increase. Many assumptions are used to calculate the impact of interest rate fluctuations on our net interest income, such as asset prepayments, non-maturity deposit price sensitivity and decay rates, and key rate drivers. Because of the inherent use of these estimates and assumptions in the model, our actual results may, and most likely will, differ from our static EAR results. In addition, static EAR results do not include actions that our management may undertake to manage the risks in response to anticipated changes in interest rates or client behavior. For example, as part of our asset/liability management strategy, management has the ability to increase asset duration and/or decrease liability duration in order to reduce asset sensitivity, or to decrease asset duration and/or increase liability duration in order to increase asset sensitivity. 

The following table illustrates the results of our EAR analysis to determine the extent to which our net interest income over the next 12 months would change if prevailing interest rates increased or decreased by the specified amounts.

	Net interest income change
Increase 200bp		3.3	%
Increase 100bp		1.8
Decrease 100bp		(3.5	)
Decrease 200bp		(9.5	)

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Provision for Loan Losses

Our policy is to maintain an allowance for loan losses at a level sufficient to absorb probable incurred losses inherent in the loan portfolio. The allowance is increased by a provision for loan losses, which is a charge to earnings, is decreased by charge-offs and is increased by loan recoveries. Our allowance for loan losses as a percentage of total loans was 0.91% and 0.85% at September 30, 2019 and December 31, 2018, respectively.

The provision for loan losses amounted to $(0.1) million and $0.8 million, respectively, for the three and nine months ended September 30, 2019 compared to $0.5 million and $1.3 million, respectively, for the three and nine months ended September 30, 2018. Provision expense is impacted by the absolute level of loans, loan growth, the credit quality of the loan portfolio and the amount of net charge-offs.

Based upon our evaluation of the loan portfolio, we believe the allowance for loan losses to be adequate to absorb our estimate of probable losses existing in the loan portfolio at September 30, 2019. While our policies and procedures used to estimate the allowance for loan losses, as well as the resultant provision for loan losses charged to operations, are considered adequate by management, they are necessarily approximate and imprecise. There are factors beyond our control, such as conditions in the local and national economy, local real estate markets, or particular industry or borrower-specific conditions, which may materially negatively impact our asset quality and the adequacy of our allowance for loan losses and, thus, the resulting provision for loan losses.  See “Notes to Consolidated Financial Statements (Unaudited) — Note 3 — Loans and Allowance for Loan Losses” for additional information on our allowance for loan losses.

Noninterest Income

In addition to net interest income, we generate other types of recurring noninterest income from our lines of business. Our banking operations generate revenue from service charges and fees on deposit accounts. We have a mortgage banking division that generates revenue from originating and selling mortgages, a division that originates and sells commercial real estate loans (Tri-Net), and we have a revenue-sharing relationship with a registered broker-dealer, which generates wealth management fees. In addition to these types of recurring noninterest income, we own insurance on several key employees and record income on the increase in the cash surrender value of these policies.

The following table sets forth the principal components of noninterest income for the periods indicated.

						2019 - 2018								2019 - 2018
	Three Months Ended					Percent			Nine Months Ended					Percent
	September 30,					Increase			September 30,					Increase
	2019		2018			(Decrease)			2019			2018		(Decrease)
Noninterest income:
Treasury management and other deposit service charges	$	788	$	528			49.2	%	$	2,399		$	1,357		76.8	%
Net gain (loss) on sale of securities		—		(1	)		(100.0	)%		(108	)		2		(5154.4	)%
Tri-Net fees		847		373			126.7	%		2,511			1,227		104.7	%
Mortgage banking income		2,679		1,634			64.0	%		7,151			4,329		65.2	%
Other noninterest income		2,474		684			262.2	%		6,602			2,157		206.1	%
Total noninterest income	$	6,788	$	3,218			110.9	%	$	18,555		$	9,072		104.5	%

The increase in treasury management and other deposit service charges for the three and nine months ended September 30, 2019 compared to the same periods in 2018 was driven primarily by our acquisition of Athens and by transaction volume, which can fluctuate from period to period.  Growth in the volume of our commercial and consumer deposit accounts was the primary contributor to the increase.  

Tri-Net fees are generated from originating and selling commercial real estate loans to third-party investors.  All of these loan sales transfer servicing rights to the buyer.  The volume of loan sales fluctuates from period to period based on various factors, including, but not limited to, market conditions and our need for liquidity.

Mortgage banking income consists of mortgage fee income from the origination and sale of mortgage loans.  These mortgage fees are for loans that we originated in our markets that are subsequently sold to third-party investors.  Mortgage origination fees will fluctuate from quarter to quarter as the interest rate environment changes.  During the second quarter of 2019 we implemented a hedging program for residential mortgage loans originated with the intent to sell.  In connection with this program, we elected the fair value option for this portfolio resulting in additional gains (losses) of $(0.2) million and $0.7 million included in mortgage banking income for the three and nine months ended September 30, 2019, respectively.

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Other noninterest income primarily consists of loan related fees, interchange income and wealth management income.  The increase from 2018 to 2019 was primarily due to organic growth and our acquisition of Athens.  

Noninterest Expense

Our total noninterest expense increase reflects expenses that we have incurred as we build the foundation to support our recent growth and enable us to execute our growth strategy. The following table presents the primary components of noninterest expense for the periods indicated.

					2019 - 2018							2019 - 2018
	Three Months Ended				Percent			Nine Months Ended				Percent
	September 30,				Increase			September 30,				Increase
	2019		2018		(Decrease)			2019		2018		(Decrease)
Noninterest expense:
Salaries and employee benefits	$	9,229	$	6,514		41.7	%	$	26,224	$	19,111		37.2	%
Data processing and software		1,790		803		122.8	%		5,126		2,411		112.6	%
Professional fees		528		255		106.5	%		1,571		1,074		46.3	%
Occupancy		858		544		57.7	%		2,550		1,600		59.4	%
Equipment		1,012		520		94.6	%		2,890		1,661		73.9	%
Regulatory fees		18		228		(92.2	)%		564		664		(15.1	)%
Merger related expenses		187		540		(65.5	)%		2,491		875		184.8	%
Amortization of intangibles		408		3		12359.8	%		1,258		23		5382.7	%
Other operating		1,501		663		127.2	%		4,054		2,236		81.4	%
Total noninterest expense	$	15,531	$	10,070		54.2	%	$	46,728	$	29,655		57.6	%

Salaries and employee benefits increased 41.7% and 37.2%, respectively, for the three and nine months ended September 30, 2019 compared to the similar periods in 2018. The increase is primarily related to the addition of personnel associated with our acquisition of Athens and continued expansion in the Nashville MSA. The number of full-time employees increased from 175 at January 1, 2018 to 290 at September 30, 2019.

Data processing and software expense increased during the periods presented due to an increase in the volume of transactions from organic growth and costs associated with running dual systems related to our acquisition of Athens.  The Athens related systems conversion occurred during April 2019.

The increase in occupancy expense and equipment expense for each of the periods presented is due to our acquisition of Athens and relocating our Brentwood branch location at the beginning of 2019.

Merger related expenses are the result of our acquisition with Athens. Amortization of intangibles increased from 2018 to 2019 due to the new core deposit intangible recorded in connection with the Athens acquisition.

Our efficiency ratio (ratio of noninterest expense to the sum of net interest income and noninterest income) was 64.9% for the three months ended September 30, 2019 compared to 68.2% for the same period 2018.  For the nine months ended September 30, 2019 and 2018, our efficiency ratio was 67.0% and 68.9%, respectively. The efficiency ratio measures the amount of expense that is incurred to generate a dollar of revenue. For the nine months ended September 30, 2019, our revenue base (net interest income plus noninterest income) grew at a rate of approximately 1.1 times our noninterest expense.

Income Tax Provision

During the three and nine months ended September 30, 2019, we recorded income tax expense of $2.1 million and $5.2 million, respectively, compared to $0.6 million and $1.7 million, respectively, for the three and nine months ended September 30, 2018. Our income tax expense for the nine months ended September 30, 2019 reflects an effective income tax rate of 23.5% compared to 14.1% for the same period in 2018.  Our effective tax rate differs from the statutory tax rate by our investments in municipal securities, company owned life insurance, state tax credits, certain non-deductible expenses, and the recognition of excess tax benefits related to stock compensation.  

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In March 2016, the FASB issued guidance to simplify several aspects of the accounting for share-based payment award transactions, including income tax consequences. In addition to other changes, the guidance changes the accounting for excess tax benefits and tax deficiencies from generally being recognized in additional paid-in capital to recognition as income tax expense or benefit in the period they occur. As a result, the Company’s income tax expense was decreased by $23,000 and $54,000 for the three and nine months ended September 30, 2019, respectively, and decreased by $422,000 and $1,062,000 for the three and nine months ended September 30, 2018, respectively.

(b) Financial Condition

Balance Sheet

Total assets increased $70.0 million, or 3.6%, from $1.96 billion on December 31, 2018 to $2.03 billion on September 30, 2019. Loans decreased $18.0 million, or 1.3%, during the nine months ended September 30, 2019, cash increased $48.6 million, or 46.1%, offset by a decrease in securities of $40.7 million, or 16.5% for the same period. Loans held for sale increased $72.0 million, or 125%, during the nine months ended September 30, 2019.  

Total liabilities increased $56.3 million, or 3.3%, from $1.71 billion on December 31, 2018 to $1.77 billion on September 30, 2019. Deposits increased $161.8 million, or 10.3% over the same period of time.  We utilized this growth in deposits to decrease our Federal Home Loan Bank advances $115.0 million during the nine months ended September 30, 2019.

Loans and Leases

The composition of loans and leases at September 30, 2019 and December 31, 2018 and the percentage of each classification to total loans are summarized as follows:

	September 30, 2019					December 31, 2018
	Amount		Percent			Amount		Percent
Commercial real estate	$	576,748		40.8	%	$	550,446		38.5	%
Consumer real estate		254,736		18.0	%		253,562		17.7	%
Construction and land development		132,222		9.4	%		174,670		12.2	%
Commercial and industrial		382,816		27.1	%		404,600		28.3	%
Consumer		29,059		2.1	%		25,615		1.8	%
Other		36,187		2.6	%		20,901		1.5	%
Total loans	$	1,411,768		100.0	%	$	1,429,794		100.0	%

At September 30, 2019, our loan portfolio composition remained relatively consistent with the composition at December 31, 2018. The commercial real estate category contains owner-occupied loans which are similar in many ways to our commercial and industrial lending in that these loans are generally made to businesses on the basis of the cash flows of the business rather than on the valuation of the real estate. As of September 30, 2019 and December 31, 2018, owner-occupied commercial real estate loans were $169.4 million and $141.9 million, respectively.

Non-Performing Loans and Assets

Information summarizing non-performing assets, including non-accrual loans follows:

	September 30, 2019			December 31, 2018
Non-accrual loans	$	1,701		$	2,078
Troubled debt restructurings		2,725			1,391
Loans past due over 89 days and still accruing		551			214
Non-performing loans		1,701			2,078
Other real estate owned		914			988
Non-performing assets	$	2,615		$	3,066
Non-performing loans as a percentage of total loans		0.12	%		0.15	%
Non-performing assets as a percentage of total assets		0.13	%		0.16	%

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The following table sets forth the major classifications of non-accrual loans:

	September 30, 2019		December 31, 2018
Commercial real estate	$	—	$	—
Consumer real estate		1,098		1,187
Construction and land development		120		19
Commercial and industrial		458		817
Consumer		25		55
Other		—		—
Total loans	$	1,701	$	2,078

(c) Liquidity

Liquidity risk is the risk that we will be unable to meet our obligations as they become due because of an inability to liquidate assets or obtain adequate funding.  To manage liquidity risk, management has established a comprehensive management process for identifying, measuring, monitoring and controlling liquidity risk.  Because of its critical importance to the viability of the Bank, liquidity risk management is fully integrated into our risk management processes. Critical elements of our liquidity risk management include: effective corporate governance consisting of oversight by the board of directors and active involvement by management; appropriate strategies, policies, procedures, and limits used to manage and mitigate liquidity risk; comprehensive liquidity risk measurement and monitoring systems (including assessments of the current and prospective cash flows or sources and uses of funds) that are commensurate with the complexity and business activities of the Bank; active management of intraday liquidity and collateral; an appropriately diverse mix of existing and potential future funding sources; adequate levels of highly liquid marketable securities free of legal, regulatory, or operational impediments, that can be used to meet liquidity needs in stressful situations; comprehensive contingency funding plans that sufficiently address potential adverse liquidity events and emergency cash flow requirements; and internal controls and internal audit processes sufficient to determine the adequacy of the institution’s liquidity risk management process.

The role of liquidity management is to ensure funds are available to meet depositors’ withdrawal and borrowers’ credit demands while at the same time maximizing financial results. This is accomplished by balancing changes in demand for funds with changes in the supply of those funds. Liquidity is provided by short-term liquid assets that can be converted to cash, investment securities available-for-sale, various lines of credit available to us, and the ability to attract funds from external sources, principally deposits.

Our most liquid assets are comprised of cash and due from banks, available-for-sale marketable investment securities and federal funds sold. The fair value of the available-for-sale investment portfolio was $203.5 million at September 30, 2019. We pledge portions of our investment securities portfolio to secure public fund deposits, derivative positions and Federal Home Loan Bank (“FHLB”) advances. At September 30, 2019, total investment securities pledged for these purposes comprised 39% of the estimated fair value of the entire investment portfolio, leaving $126.3 million of unpledged securities.

We have a large base of non-maturity customer deposits, defined as demand, savings, and money market deposit accounts. At September 30, 2019, such deposits totaled $1.4 billion and represented 82% of our total deposits.

Other sources of funds available to meet daily needs include FHLB advances. As a member of the FHLB of Cincinnati, the Company has access to credit products offered by the FHLB. The Company views these borrowings as a low cost alternative to other time deposits. At September 30, 2019, available credit from the FHLB totaled $212.4 million. Additionally, we had available federal funds purchased lines with correspondent banks totaling $110.0 million at September 30, 2019.

The principal source of cash for CapStar Financial Holdings, Inc. (the “Parent Company”) is dividends paid to it as the sole shareholder of the Bank. At September 30, 2019, the Bank was able to pay up to $33.4 million in dividends to the Parent Company without regulatory approval subject to the ongoing capital requirements of the Bank.

Accordingly, management believes that our funding sources are at sufficient levels to satisfy our expected short-term and long-term liquidity needs.

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(d) Capital Resources

At September 30, 2019, shareholders’ equity totaled $268.1 million, an increase of $13.7 million since December 31, 2018. Accordingly, as of September 30, 2019, the Company and the Bank were well-capitalized under the regulatory framework for prompt corrective action.  During the third quarter of 2019, we converted all of our outstanding preferred stock and non-voting common stock to voting common stock in connection with the successful exit of our founding shareholder and largest investor, Corsair Capital.  See the Consolidated Statement of Changes in Shareholders’ Equity for further detail of the changes in equity since the end of 2018.

Off-Balance Sheet Arrangements

In the normal course of business, we enter into various transactions that, in accordance with GAAP, are not included in our consolidated balance sheet.  We enter into these transactions to meet the financing needs of our clients. These transactions include commitments to extend credit and standby letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized in our consolidated balance sheets. Most of these commitments mature within two years and are expected to expire without being drawn upon.  Standby letters of credit are included in the determination of the amount of risk-based capital that the Company and the Bank are required to hold.

We enter into contractual loan commitments to extend credit, normally with fixed expiration dates or termination clauses, at specified rates and for specific purposes. Substantially all of our commitments to extend credit are contingent upon clients maintaining specific credit standards until the time of loan funding.

Standby letters of credit are written conditional commitments issued by us to guarantee the performance of a client to a third party. In the event that the client does not perform in accordance with the terms of the agreement with the third party, we would be required to fund the commitment.  The maximum potential amount of future payments we could be required to make is represented by the contractual amount of the commitment. If the commitment is funded, we would be entitled to seek recovery from the client.  Our policies generally require that standby letter of credit arrangements contain security and debt covenants similar to those contained in loan agreements.

We minimize our exposure to loss under loan commitments and standby letters of credit by subjecting them to the same credit approval and monitoring procedures as we do for on-balance sheet instruments.  We assess the credit risk associated with certain commitments to extend credit and establish a liability for probable credit losses.  The effect on our revenue, expenses, cash flows and liquidity of the unused portions of these commitments cannot be reasonably predicted because there is no guarantee that the lines of credit will be used.

Our off-balance sheet arrangements are summarized in Note 8 of the consolidated financial statements.

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(e) Non-GAAP Financial Measures

This Report includes the following financial measures that have been prepared other than in accordance with generally accepted accounting principles in the United States (“non-GAAP financial measures”): tangible common equity, tangible common equity to total tangible assets and tangible common equity per share. The Company believes that these non-GAAP financial measures (i) provide useful information to management and investors that is supplementary to its financial condition, results of operations and cash flows computed in accordance with GAAP, (ii) enable a more complete understanding of factors and trends affecting the Company’s business, and (iii) allow investors to evaluate the Company’s performance in a manner similar to management, the financial services industry, bank stock analysts and bank regulators; however, the Company acknowledges that its non-GAAP financial measures have a number of limitations.  As such, you should not view these disclosures as a substitute for results determined in accordance with GAAP, and they are not necessarily comparable to non-GAAP financial measures that other companies use.

The following table presents a reconciliation of tangible common equity, tangible common equity to total tangible assets and tangible common equity per share to the most directly comparable GAAP financial measures.

(dollars in thousands, except per share data)	September 30, 2019			December 31, 2018
Total equity	$	268,082		$	254,379
Less core deposit intangible		(7,280	)		(8,538	)
Less goodwill		(37,510	)		(37,510	)
Less preferred stock		—			(878	)
Less preferred stock additional paid-in capital		—			(8,122	)
Tangible common equity	$	223,292		$	199,331
Total assets	$	2,033,911		$	1,963,883
Less core deposit intangible		(7,280	)		(8,538	)
Less goodwill		(37,510	)		(37,510	)
Total tangible assets	$	1,989,121		$	1,917,835
Total shareholders' equity to total assets		13.18	%		12.95	%
Tangible common equity ratio		11.23	%		10.39	%
Total shares of common stock outstanding		18,343,403			17,724,721
Book value per share of common stock	$	14.61		$	13.84
Tangible book value per share of common stock		12.17			11.25

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(f) Recently Issued Accounting Pronouncements

ASU 2016-02, Leases

In February 2016, the FASB amended the Leases topic of the Accounting Standards Codification to revise certain aspects of recognition, measurement, presentation, and disclosure of leasing transactions. The amendments will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted.

The Company adopted the guidance using the modified retrospective method and practical expedients for transition. The practical expedients allow the Company to largely account for our existing leases consistent with current guidance except for the incremental balance sheet recognition for lessees. The Company evaluated the new guidance and its impact on the Company’s financial statements. Based on leases outstanding at December 31, 2018, the impact of adoption on January 1, 2019 was recording a lease liability of approximately $13.4 million, a right-of-use asset of approximately $12.8 million, and elimination of deferred rent of approximately $0.6 million. The leasing liability and right-of-use asset are recorded in other liabilities and other assets, respectively.

ASU 2016-13, Financial Instruments – Credit Losses

In June 2016, the FASB issued guidance to change the accounting for credit losses and modify the impairment model for certain debt securities. The amendments were originally supposed to be effective for the Company for reporting periods beginning after December 15, 2019 with early adoption permitted for all organizations for periods beginning after December 15, 2018. However, on July 17, 2019, the FASB issued a proposal draft to extend the implementation date for certain smaller reporting companies to include SEC registrants classified as a Smaller Reporting Company. On October 16, 2019, the FASB voted to delay the implementation date for SEC registrants classified as a Smaller Reporting Company to fiscal years beginning after December 15, 2022. The FASB has directed its staff to draft an ASU that will change the implementation dates, which should be issued following a formal written ballot by the FASB, which is expected to take place in November 2019. Once issued, the Company will delay implementation of the new standard until 2023.

ASU 2017-04, Simplifying the Test of Goodwill Impairment

In January 2017, the FASB amended the Goodwill and Other Topic of the Accounting Standards Codification to simplify the accounting for goodwill impairment for public business entities and other entities that have goodwill reported in their financial statements and have not elected the private company alternative for the subsequent measurement of goodwill. The amendment removes Step 2 of the goodwill impairment test. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill.  The effective date and transition requirements for the technical corrections will be effective for the Company for reporting periods beginning after December 15, 2019.  The Company does not expect these amendments to have a material effect on its financial statements.

ASU 2018-07, Compensation – Stock Compensation

In June 2018, the FASB amended the Compensation—Stock Compensation Topic of the Accounting Standards Codification. The amendments expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The amendments are effective for years beginning after December 15, 2018, including interim periods within that year. Early adoption is permitted, but no earlier than an entity’s adoption date of Topic 606. These amendments did not have a material effect on the Company’s financial statements.

(g) Impact of Inflation

The consolidated financial statements and related consolidated financial data presented herein have been prepared in accordance with U.S. GAAP and practices within the banking industry which require the measurement of financial position and operating results in terms of historical dollars without considering the changes in the relative purchasing power of money over time due to inflation. Unlike most industrial companies, virtually all the assets and liabilities of a financial institution are monetary in nature. As a result, interest rates have a more significant impact on a financial institution's performance than the effects of general levels of inflation.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Information required by this item is included in “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Results of Operations – Interest Rate Simulation Sensitivity Analysis” of this Report.

43

Item 4. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

The Company, with the participation of its management, including its Chief Executive Officer and Chief Financial Officer, carried out an evaluation of the effectiveness of the design and operation of its disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Report.  Based upon that evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered by this Report, the Company’s disclosure controls and procedures were effective to ensure that information required to be disclosed in the Company’s filings under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and to ensure that such information is accumulated and communicated to the Company’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting that occurred during the period covered by this Report that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

44

PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

General

From time to time, the Company is party to legal actions that are routine and incidental to its business.  Given the nature, scope and complexity of the extensive legal and regulatory landscape applicable to the Company’s business, including laws and regulations governing consumer protection, fair lending, fair labor, privacy, information security and anti-money laundering and anti-terrorism laws, the Company, like all banking organizations, is subject to heightened legal and regulatory compliance and litigation risk.  However, based upon available information and in consultation with legal counsel, management does not expect the ultimate disposition of any or a combination of these actions to have a material adverse effect on the Company’s assets, business, cash flow, condition (financial or otherwise), liquidity, prospects and\or results of operations.

Litigation Against Gaylon M. Lawrence & The Lawrence Group

On October 31, 2017, CapStar filed a complaint, captioned CapStar Financial Holdings, Inc. v. Gaylon M. Lawrence & The Lawrence Group, Case No. 3:17-cv-01421, in the U.S. District Court for the Middle District of Tennessee, in connection with Mr. Lawrence and The Lawrence Group's acquisition of CapStar stock. The complaint alleges that defendants violated Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") by filing materially false and misleading Schedules 13D regarding defendants' acquisition of a minority stake (1,156,675 shares) of CapStar stock. It also alleged that defendants violated the Change in Bank Control Act, 12 U.S.C. § 1817(j) (the "CBCA"), by attempting to acquire control of CapStar without first receiving approval from the Federal Reserve, and also that defendants violated Tennessee Code Section 45-2-107 by controlling banks without having registered as a bank holding company. 

By order dated December 18, 2017, the court granted CapStar's motion for expedited discovery, which is presently underway. Defendants have filed a motion to dismiss the action as well as a separate motion to stay.  The motion to stay was denied by the court on May 21, 2018.  On September 24, 2018, the court denied in part and granted in part defendants' motion to dismiss, permitting CapStar's claims that defendants violated Tennessee Code Section 45-2-107 under Section 13(d) of the Exchange Act to proceed.

Mr. Lawrence has also filed an Interagency Notice of Change in Control pursuant to the CBCA with the Federal Reserve on October 30, 2017, seeking permission to acquire up to 15% of the outstanding voting shares of CapStar's common stock. At the Federal Reserve's direction, on March 13, 2018, Mr. Lawrence requested that the Federal Reserve suspend processing of this notice.On November 6, 2018, the Federal Reserve notified the Company that it has determined not to disapprove the notice, subject to compliance by Mr. Lawrence and his affiliates with extensive representations and commitments set forth in correspondence between Mr. Lawrence and the Federal Reserve.

Item 1A. Risk Factors.

In evaluating an investment in the Company’s securities, investors should consider carefully, among other things, information under the heading “Cautionary Note Regarding Forward-Looking Statements” in this Report as well as those factors that are detailed from time to time in the Company’s periodic and current reports filed with the SEC, including those factors included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 under the heading “Item 1A. Risk Factors” and in the Company’s Quarterly Reports on Form 10-Q and Current Reports on Form 8-K.

There have been no material changes from the risk factors previously disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

45

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

Unregistered Sales of Equity Securities

The following table shows information relating to the repurchase of shares of common stock by the Company during the three months ended September 30, 2019.

	Total number of shares purchased (1)			Average price paid per share		Total number of shares purchased as part of publicly announced plan (2)		Maximum number (or approximate dollar value) of shares that may yet be purchased under the plan
July 1 - July 31		—		$	—		—	$2.15 million
August 1 - August 31		1,305	(3)		15.97		—	$2.15 million
September 1 - September 30		130,615	(3)		15.41		129,786	$9.00 million
Total		131,920	(3)	$	15.42		129,786	$9.00 million

_____________________________________________

(1) The total amounts include shares of stock withheld to pay taxes due upon vesting of restricted shares. The Company’s withholding of shares to pay taxes due upon the vesting of restricted shares has no impact on the number of shares that may be repurchased under the Repurchase Program (defined below).

(2) On December 21, 2018, the Company announced that its Board of Directors authorized a share repurchase program (the “Original Repurchase Program”) pursuant to which the Company could purchase up to $8,000,000 (the “Original Maximum Dollar Amount”) of its issued and outstanding shares of common stock, par value $1.00 per share (“Common Stock”). On September 5, 2019, the Company announced that its Board of Directors authorized an expansion of the Original Share Repurchase Program (the “Expanded Share Repurchase Program”). Under the Expanded Share Repurchase Program, the amount of Common Stock the Company is authorized to repurchase was increased from approximately $2.2 million, the amount remaining of the Original Maximum Dollar Amount, to $11 million (the “Expanded Maximum Dollar Amount”). The Expanded Share Repurchase Program will terminate on the date on which the Expanded Maximum Dollar Amount of Common Stock has been repurchased.

(3) The Company acquired 2,134 total shares through withholdings to pay taxes due upon the vesting of restricted shares.

Use of Proceeds

On September 27, 2016, the Company sold 1,688,049 shares of its common stock, including 387,750 shares purchased by the underwriters pursuant to the full exercise of their purchase option, in its initial public offering (“IPO”).  In addition, certain selling shareholders participated in the IPO and sold an aggregate of 1,284,701 shares of the Company’s common stock.    

The shares were sold at a public offering price of $15.00 per share, resulting in aggregate gross proceeds of approximately $44.6 million. The aggregate offering price for the shares sold by the Company was approximately $25.3 million, and after deducting approximately $1.6 million for the underwriting discount and approximately $2.1 million of offering expenses paid to third parties, the Company received net proceeds of approximately $21.6 million.  The aggregate offering price for the shares sold by the selling shareholders was approximately $19.3 million.

All of the shares were sold pursuant to our Registration Statement on Form S-1, as amended (File No. 333-213367), which was declared effective by the SEC on September 21, 2016. The offering did not terminate until all of the shares offered were sold.  The Company made no payments to its directors, officers or persons owning ten percent or more of its common stock or to their associates, or to its affiliates in connection with the issuance and sale of the common stock or in connection with the use of IPO proceeds.  Keefe, Bruyette & Woods, Inc. and Sandler O’Neill & Partners, L.P. acted as lead book-running managers for the initial public offering. Our common stock is currently trading on the NASDAQ Global Select Market under the symbol “CSTR.”

There has been no material change in the planned use of proceeds from our IPO as described in our prospectus filed with the SEC on September 23, 2016 pursuant to Rule 424(b)(4) under the Securities Act. Pending application of the IPO proceeds, we have invested the net proceeds in short-term investments.  During 2017, the Company provided $10.0 million of the IPO proceeds as a capital contribution to the Bank for working capital purposes.

46

Item 5. Other Information.

On September 12, 2019, the Company was advised by the funds managed by Corsair Investments, L.P. (“Corsair”) that Corsair entered into arrangements to fully exit its position in the Company through the sale of all of its remaining shares of Company common stock.

On October 24, 2019, the board of directors of the Company (the “Board”) approved an amendment and restatement of the Company’s bylaws (the “Bylaws” and as further amended and restated, the “Amended and Restated Bylaws”). The Amended and Restated Bylaws clarified and implemented additional disclosure requirements for shareholder nominees of individuals for election to the Board. The amendments include the following changes, among others:

• Clarifying that the advance notice bylaw represents the exclusive means for a shareholder to bring nominations before a shareholder meeting (other than proposals submitted for inclusion in the Company’s proxy statement pursuant to Rule 14a-8 under the Securities Exchange Act of 1934, as amended).

• A shareholder seeking to bring a nomination before a shareholder’s meeting is now required to disclose (1) a more broadly defined set of derivative and short positions, (2) compensation arrangements between nominees and the nominating shareholders, and (3) evidence satisfactory to the Board that the election of nominees would not violate the organizational documents of the Company or any applicable state or federal banking laws; and requiring the shareholder to update such disclosure as needed so that it remains accurate as of the record date for the meeting and as of 10 business days prior to the meeting date.

• Requiring that the questionnaire, representations and agreements for any director nominee must be delivered in the same timeframe as a shareholder’s notice of nomination.

• Adding that the Company may require proposed nominees for director to furnish additional information regarding the eligibility of the nominee to serve as an independent director.

• Adding that a shareholder nominee must deliver to the Company a signed agreement that such nominee would be in compliance if elected as a director of the Company and will comply with the qualification requirements for directors of the Company set forth in the policies and guidelines of the Company publicly disclosed from time to time.  

• Adding that a nominating shareholder or its representative authorized in writing must actually appear at the meeting in person in order for the nomination to be considered.

This description of the Amended and Restated Bylaws is qualified in its entirety by reference to the text of the Amended and Restated Bylaws.

Item 6. Exhibits.

Exhibit Number	Description
2.1	Agreement and Plan of Merger, dated as of June 11, 2018, by and between CapStar Financial Holdings, Inc. and Athens Bancshares Corporation (incorporated by reference herein to Exhibit 2.1 to the Company’s Current Report on Form 8-K  filed on June 14, 2018)
3.1	Charter of CapStar Financial Holdings, Inc. (incorporated by reference herein to Exhibit 3.1 to the Company’s Registration Statement on Form S-1 (File Number 333-213367) filed on August 29, 2016)
3.2	Amended and Restated Bylaws of CapStar Financial Holdings, Inc. (incorporated by reference herein to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on October 28, 2019)
4.1	Form of Common Stock Certificate (incorporated by reference herein to Exhibit 4.1 to Amendment No. 2 to the Company’s Registration Statement on Form S-1 (File Number 333-213367) filed on September 20, 2016)

47

4.2	Second Amended and Restated Shareholders’ Agreement, dated as of August 22, 2016, among CapStar Financial Holdings, Inc., CapStar Bank, Corsair III Financial Services Capital Partners, L.P., Corsair III Financial Services Offshore 892 Partners, L.P., North Dakota Investors, LLC and certain other persons named therein (incorporated by reference herein to Exhibit 4.2 to the Company’s Registration Statement on Form S-1 (File Number 333-213367) filed on August 29, 2016)
10.1	Securities Purchase Agreement, dated as of September 9, 2019, by and among Corsair, CapStar Financial Holdings, Inc. and those directors and officers of CapStar Financial Holdings, Inc. identified on Schedule I thereto (incorporated by reference herein to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on September 9, 2019)
31.1	Certification of Chief Executive Officer of CapStar Financial Holdings, Inc. pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended, adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, as amended.*
31.2	Certification of Chief Financial Officer of CapStar Financial Holdings, Inc. pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended, adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, as amended.*
32.1	Certification of Chief Executive Officer of CapStar Financial Holdings, Inc. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, as amended.**
32.2	Certification of Chief Financial Officer of CapStar Financial Holdings, Inc. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, as amended.**
101.INS	XBRL Instance Document.*
101.SCH	XBRL Taxonomy Extension Schema Document.*
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.*
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.*
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.*
101.DEF	XBRL Taxonomy Extension Definition Document.*

* Filed with this Quarterly Report on Form 10-Q.

** Furnished with this Quarterly Report on Form 10-Q.

† Represents a management contract or a compensatory plan or arrangement.

48

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.

	CAPSTAR FINANCIAL HOLDINGS, INC.
By:	/s/ Robert B. Anderson
	Robert B. Anderson
	Chief Financial Officer and Chief Administrative Officer
	(Duly Authorized Officer and Principal Financial Officer)

Date:  November 6, 2019

49

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO RULE 13A-14(A) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Timothy K. Schools, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of CapStar Financial Holdings, 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(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

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

5. The registrant’s other certifying officer(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: November 6, 2019

By:	/s/ Timothy K. Schools
	Timothy K. Schools
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13A-14(A) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Robert B. Anderson, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of CapStar Financial Holdings, 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(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

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

5. The registrant’s other certifying officer(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:  November 6, 2019

By:	/s/ Robert B. Anderson
	Robert B. Anderson
	Chief Financial Officer and
	Chief Administrative Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of CapStar Financial Holdings, Inc. (the “Company”) for the period ended September 30, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Timothy K. Schools, President and Chief Executive Officer of the Company, certify in my capacity as an officer of the Company, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities and Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 6, 2019

By:	/s/ Timothy K. Schools
	Timothy K. Schools
	President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of CapStar Financial Holdings, Inc. (the “Company”) for the period ended September 30, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert B. Anderson, Chief Financial Officer and Chief Administrative Officer of the Company, certify in my capacity as an officer of the Company, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

1. The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities and Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 6, 2019

By:	/s/ Robert B. Anderson
	Robert B. Anderson
	Chief Financial Officer and
	Chief Administrative Officer

XML

Loans and Allowance for Loan Losses - Schedule of Non-Accrual Loans, Past Due Loans over 89 Days Outstanding and Accruing and Troubled Debt Restructurings (TDR) by Class of Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	$ 1,701	$ 2,078
Past Due Over 89 Days and Accruing	551	214
Troubled Debt Restructurings	2,725	1,391
Commercial real estate
Accounts Notes And Loans Receivable [Line Items]
Troubled Debt Restructurings	2,454	1,391
Consumer real estate
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	1,098	1,187
Past Due Over 89 Days and Accruing	293	214
Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	120	19
Commercial and industrial
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	458	817
Past Due Over 89 Days and Accruing	258
Troubled Debt Restructurings	271
Consumer
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	$ 25	$ 55

XML

Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 464	$ 1,402
Total lease cost	$ 464	$ 1,402

XML

Accumulated Other Comprehensive Income (Loss) - Summary of Changes In Accumulated Other Comprehensive Income (Loss) By Component, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 262,664	$ 259,751	$ 254,379	$ 153,146	$ 148,692	$ 146,946	$ 254,379	$ 146,946
Other comprehensive income (loss) before reclassification, net of tax							5,286	(2,721)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax							(698)	(633)
Other comprehensive income (loss)	1,086	1,090	2,412	(577)	(111)	(2,666)	4,588	(3,354)
Ending balance	268,082	262,664	259,751	157,510	153,146	148,692	268,082	157,510
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(2,636)			(3,679)	(2,636)	(3,679)
Other comprehensive income (loss) before reclassification, net of tax							325	1,800
Amounts reclassified from accumulated other comprehensive income (loss), net of tax							(618)	(642)
Other comprehensive income (loss)							(293)	1,158
Ending balance	(2,929)			(2,521)			(2,929)	(2,521)
Unrealized Gains and Losses on Available for Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(680)			1,162	(680)	1,162
Other comprehensive income (loss) before reclassification, net of tax							4,961	(4,521)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax							(80)	(1)
Other comprehensive income (loss)							4,881	(4,522)
Ending balance	4,201			(3,360)			4,201	(3,360)
Unrealized Losses on Securities Transferred to Held to Maturity
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance						(10)		(10)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax								10
Other comprehensive income (loss)								10
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	186	(904)	(3,316)	(5,304)	(5,193)	(2,527)	(3,316)	(2,527)
Other comprehensive income (loss)	1,086	1,090	2,412	(577)	(111)	(2,666)	3,502	(2,778)
Ending balance	$ 1,272	$ 186	$ (904)	$ (5,881)	$ (5,304)	$ (5,193)	$ 1,272	$ (5,881)

XML

Fair Value - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Assets:
Securities available-for-sale, at fair value	$ 203,500,000	$ 243,808,000
Loans held for sale carried at fair value	45,988,000	0
Obligations of States and Political Subdivisions
Assets:
Securities available-for-sale, at fair value	51,443,000	61,926,000
Asset-backed securities
Assets:
Securities available-for-sale, at fair value	3,233,000	15,284,000
Other debt securities
Assets:
Securities available-for-sale, at fair value	9,903,000	11,734,000
Significant Unobservable Inputs (Level 3) | Mortgage Loan Interest Rate Lock Commitments | Non-hedging derivatives
Derivative assets:
Residential mortgage loans held for sale	807,000
Fair Value Measurements Recurring Basis
Assets:
Loans held for sale carried at fair value	45,988,000
Fair Value Measurements Recurring Basis | U.S. Government-sponsored Agencies
Assets:
Securities available-for-sale, at fair value	9,230,000	10,706,000
Fair Value Measurements Recurring Basis | Obligations of States and Political Subdivisions
Assets:
Securities available-for-sale, at fair value	51,443,000	61,926,000
Fair Value Measurements Recurring Basis | Mortgage-backed Securities-residential
Assets:
Securities available-for-sale, at fair value	129,691,000	144,158,000
Fair Value Measurements Recurring Basis | Asset-backed securities
Assets:
Securities available-for-sale, at fair value	3,233,000	15,284,000
Fair Value Measurements Recurring Basis | Other debt securities
Assets:
Securities available-for-sale, at fair value	9,903,000	11,734,000
Fair Value Measurements Recurring Basis | Mortgage Loan Interest Rate Lock Commitments | Non-hedging derivatives
Derivative assets:
Residential mortgage loans held for sale	807,000
Fair Value Measurements Recurring Basis | Forward Sales Commitments | Non-hedging derivatives
Derivative liabilities:
Mortgage-backed securities forward sales commitments	83,000
Fair Value Measurements Recurring Basis | Interest Rate Swaps - Customer Related | Non-hedging derivatives
Derivative assets:
Interest rate swaps - customer related	909,000	494,000
Derivative liabilities:
Total derivative liabilities	(909,000)	(494,000)
Fair Value Measurements Recurring Basis | Interest Rate Swaps - Cash Flow Hedges
Derivative liabilities:
Total derivative liabilities		(836,000)
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2)
Assets:
Loans held for sale carried at fair value	45,988,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | U.S. Government-sponsored Agencies
Assets:
Securities available-for-sale, at fair value	9,230,000	10,706,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Obligations of States and Political Subdivisions
Assets:
Securities available-for-sale, at fair value	51,443,000	61,926,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed Securities-residential
Assets:
Securities available-for-sale, at fair value	129,691,000	144,158,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Securities available-for-sale, at fair value	3,233,000	15,284,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Other debt securities
Assets:
Securities available-for-sale, at fair value	9,903,000	11,734,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Forward Sales Commitments | Non-hedging derivatives
Derivative liabilities:
Mortgage-backed securities forward sales commitments	83,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Interest Rate Swaps - Customer Related | Non-hedging derivatives
Derivative assets:
Interest rate swaps - customer related	909,000	494,000
Derivative liabilities:
Total derivative liabilities	(909,000)	(494,000)
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Interest Rate Swaps - Cash Flow Hedges
Derivative liabilities:
Total derivative liabilities		$ (836,000)
Fair Value Measurements Recurring Basis | Significant Unobservable Inputs (Level 3) | Mortgage Loan Interest Rate Lock Commitments | Non-hedging derivatives
Derivative assets:
Residential mortgage loans held for sale	$ 807,000

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Regulatory Capital Requirements - Schedule of Capital Amounts and Ratios (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
CapStar Financial Holdings, Inc.
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital to risk-weighted assets, actual amount		$ 232,896	$ 222,030
Tier I capital to risk-weighted assets, actual amount		219,889	209,738
Tier I capital to average assets, actual amount		$ 219,889	$ 209,738
Total capital to risk-weighted assets, actual ratio		13.46%	12.84%
Tier I capital to risk-weighted assets, actual ratio		12.71%	12.13%
Tier I capital to average assets, actual ratio		11.24%	11.06%
Total capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 138,398	$ 138,336
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	103,799	103,752
Tier I capital to average assets, minimum capital requirement amount	[1]	$ 78,232	$ 75,867
Total capital to risk-weighted assets, minimum capital requirement ratio	[1]	8.00%	8.00%
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	6.00%	6.00%
Tier I capital to average assets, minimum capital requirement ratio	[1]	4.00%	4.00%
CapStar Financial Holdings, Inc. | Common Stock
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier I capital to risk-weighted assets, actual amount		$ 219,889	$ 200,738
Tier I capital to risk-weighted assets, actual ratio		12.71%	11.61%
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 77,849	$ 77,814
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	4.50%	4.50%
CapStar Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital to risk-weighted assets, actual amount		$ 219,513	$ 201,972
Tier I capital to risk-weighted assets, actual amount		206,506	189,680
Tier I capital to average assets, actual amount		$ 206,506	$ 189,680
Total capital to risk-weighted assets, actual ratio		12.69%	11.68%
Tier I capital to risk-weighted assets, actual ratio		11.94%	10.97%
Tier I capital to average assets, actual ratio		10.56%	10.01%
Total capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 138,351	$ 138,294
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	103,763	103,721
Tier I capital to average assets, minimum capital requirement amount	[1]	$ 78,206	$ 75,828
Total capital to risk-weighted assets, minimum capital requirement ratio	[1]	8.00%	8.00%
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	6.00%	6.00%
Tier I capital to average assets, minimum capital requirement ratio	[1]	4.00%	4.00%
Total capital to risk-weighted assets, minimum to be well capitalized amount	[2]	$ 172,939	$ 172,868
Tier I capital to risk-weighted assets, minimum to be well capitalized amount	[2]	138,351	138,294
Tier I capital to average assets, minimum to be well capitalized amount	[2]	$ 97,757	$ 94,785
Total capital to risk-weighted assets, minimum to be well capitalized ratio	[2]	10.00%	10.00%
Tier I capital to risk-weighted assets, minimum to be well capitalized ratio	[2]	8.00%	8.00%
Tier I capital to average assets, minimum to be well capitalized ratio	[2]	5.00%	5.00%
CapStar Bank | Common Stock
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier I capital to risk-weighted assets, actual amount		$ 190,006	$ 173,180
Tier I capital to risk-weighted assets, actual ratio		10.99%	10.02%
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 77,822	$ 77,791
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	4.50%	4.50%
Tier I capital to risk-weighted assets, minimum to be well capitalized amount	[2]	$ 112,410	$ 112,364
Tier I capital to risk-weighted assets, minimum to be well capitalized ratio	[2]	6.50%	6.50%

[1] For the calendar year 2019, the Company must maintain a capital conservation buffer of Tier 1 common equity capital in excess of minimum risk-based capital ratios by at least 2.5% to avoid limits on capital distributions and certain discretionary bonus payments to executive officers and similar employees.

[2] For the Company to be well-capitalized, the Bank must be well-capitalized and the Company must not be subject to any written agreement, order, capital directive, or prompt corrective action directive issued by the Federal Reserve to meet and maintain a specific capital level for any capital measure.

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Federal Home Loan Bank Advances

9 Months Ended

Sep. 30, 2019

Federal Home Loan Banks [Abstract]

Federal Home Loan Bank Advances

NOTE 5 – FEDERAL HOME LOAN BANK ADVANCES

The Company had outstanding borrowings totaling of $10.0 million and $125.0 million at September 30, 2019 and December 31, 2018, respectively, via various advances. These advances are non-callable; interest payments are due monthly, with principal due at maturity.

The following is a summary of the contractual maturities and average effective rates of outstanding advances (dollars in thousands):

	September 30, 2019					December 31, 2018
Year	Amount		Interest Rates			Amount		Interest Rates
2019	$	—		—		$	125,000		2.48	%
2020		10,000		2.20	%		—		—
2021		—		—			—		—
2022		—		—			—		—
2023		—		—			—		—
Thereafter		—		—			—		—
Total	$	10,000		2.20	%	$	125,000		2.48	%

Advances from the FHLB are collateralized by investment securities with a market value of $4.1 million, FHLB stock and certain commercial and residential real estate mortgage loans totaling $695.3 million under a blanket mortgage collateral agreement.  At September 30, 2019, the amount of available credit from the FHLB totaled $212.4 million.

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Derivatives

9 Months Ended

Sep. 30, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivatives

NOTE 9 – DERIVATIVES

The Company utilizes derivative financial instruments, interest rate swaps and mortgage banking related derivatives, as part of its ongoing efforts to manage its interest rate risk exposure as well as the exposure for its customers.  The notional amount of the interest rate swaps does not represent amounts exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual interest rate swap agreements.

Interest Rate Swaps Designated as Cash Flow Hedges

There were no interest rate swaps designated as cash flow hedges as of September 30, 2019. Forward starting interest rate swaps with notional amounts totaling $20 million as of  December 31, 2018 were designated as cash flow hedges of certain liabilities and were determined to be fully effective during all periods presented. As such, no amount of ineffectiveness was included in net income. Therefore, the aggregate fair value of the swaps is recorded in other liabilities with changes in fair value recorded in other comprehensive income. The Company terminated an interest rate swap during the second quarter of 2019 with a notional amount of $20 million, which resulted in a termination fee of $1.5 million. Cash flow swaps that have been terminated resulting in cash settlement equal to previously unrealized gains or losses are included in accumulated other comprehensive income and are being amortized to net income over the remaining contractual terms of the swaps.

Summary information about the interest-rate swaps designated as cash flow hedges was as follows (dollars in thousands):

	September 30, 2019		December 31, 2018
Notional amounts	$	—	$	20,000
Weighted average pay rates		—		3.54	%
Weighted average receive rates		—	3 month LIBOR
Weighted average maturity		—	4.5 years
Fair value	$	—	$	(836	)
Amount of unrealized loss recognized in accumulated    other comprehensive income, net of tax	$	—	$	(617	)

Pursuant to its interest rate swap agreements, the Company pledged collateral to the counterparties in the form of investment securities with a market value of $2.0 million at December 31, 2018. There was no collateral posted from the counterparties to the Company as of September 30, 2019.

Other Interest Rate Swaps

The Company also enters into swaps to facilitate customer transactions and meet their financing needs.  Upon entering into these transactions the Company enters into offsetting positions with large U.S. financial institutions in order to minimize risk to the Company. A summary of the Company’s customer related interest rate swaps was as follows (dollars in thousands):

	September 30, 2019					December 31, 2018
	Notional		Estimated			Notional		Estimated
	amount		fair value			amount		fair value
Interest rate swap agreements:
Pay fixed/receive variable swaps	$	27,487	$	(905	)	$	29,126	$	24
Pay variable/receive fixed swaps		27,487		905			29,126		(24	)
Total	$	54,974	$	—		$	58,252	$	—

Mortgage Banking Derivatives

The Company enters into various derivative agreements with customers in the form of interest-rate lock commitments which are commitments to originate mortgage loans whereby the interest rate on the loan is determined prior to funding and the customers have locked into that interest rate. The derivatives are valued using a model that utilizes market interest rates and other unobservable inputs. Changes in the fair value of these commitments due to fluctuations in interest rates that are to be originated to our loans held for sale portfolio are economically hedged through the use of forward sale commitments of mortgage-backed securities. The gains and losses arising from this derivative activity are reflected in current period earnings under mortgage banking income. Interest rate lock commitments are valued using a model with significant unobservable market parameters. Forward sale commitments are valued based on quoted prices for similar assets in an active market with inputs that are observable.

The net gains (losses) relating to mortgage banking derivative instruments included in mortgage banking income were as follows (dollars in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Mortgage loan interest rate lock commitments	$	214		$	807
Mortgage-backed securities forward sales commitments		(311	)		(664	)
Total	$	(97	)	$	143

There were no gains or losses relating to mortgage banking derivative instruments for the three or nine months ended September 30, 2018.

The amount and fair value of mortgage banking derivatives included in the consolidated balance sheets was as follows (dollars in thousands):

	September 30, 2019					December 31, 2018
	Notional		Estimated			Notional		Estimated
	amount		fair value			amount		fair value
Included in other assets:
Mortgage loan interest rate lock commitments	$	67,565	$	807		$	—	$	—
Included in other liabilities:
Mortgage-backed securities forward sales commitments	$	53,500	$	(83	)	$	—	$	—

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Securities - Summary of Sale of Debt and Equity Securities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Investments Debt And Equity Securities [Abstract]
Proceeds	$ 54,133	$ 5,778
Gross gains	370	107
Gross losses	$ (478)	$ (105)

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Summary of Significant Accounting Policies - Summary of Difference Between the Fair Value and Aggregate Unpaid Principal Balance (Details) - Residential mortgage loans held for sale - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	$ 45,988,000	$ 0
Aggregate Unpaid Principal Balance	45,296,000
Difference	$ 692,000

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Regulatory Capital Requirements (Tables)

9 Months Ended

Sep. 30, 2019

Banking And Thrift [Abstract]

Schedule of Capital Amounts and Ratios

The Company’s and the Bank’s capital amounts and ratios as of September 30, 2019 and December 31, 2018 are presented in the following table (dollars in thousands).

	Actual					Minimum capital requirement (1)					Minimum to be well-capitalized (2)
	Amount		Ratio			Amount		Ratio			Amount		Ratio
At September 30, 2019:
Total capital to risk-weighted assets:
CapStar Financial Holdings, Inc.	$	232,896		13.46	%	$	138,398		8.00	%	N/A		N/A
CapStar Bank		219,513		12.69			138,351		8.00		$	172,939		10.00
Tier I capital to risk-weighted assets:
CapStar Financial Holdings, Inc.		219,889		12.71			103,799		6.00		N/A		N/A
CapStar Bank		206,506		11.94			103,763		6.00			138,351		8.00
Common equity Tier 1 capital to risk weighted    assets:
CapStar Financial Holdings, Inc.		219,889		12.71			77,849		4.50		N/A		N/A
CapStar Bank		190,006		10.99			77,822		4.50			112,410		6.50
Tier I capital to average assets:
CapStar Financial Holdings, Inc.		219,889		11.24			78,232		4.00		N/A		N/A
CapStar Bank		206,506		10.56			78,206		4.00			97,757		5.00
At December 31, 2018:
Total capital to risk-weighted assets:
CapStar Financial Holdings, Inc.	$	222,030		12.84	%	$	138,336		8.00	%	N/A		N/A
CapStar Bank		201,972		11.68			138,294		8.00		$	172,868		10.00
Tier I capital to risk-weighted assets:
CapStar Financial Holdings, Inc.		209,738		12.13			103,752		6.00		N/A		N/A
CapStar Bank		189,680		10.97			103,721		6.00			138,294		8.00
Common equity Tier 1 capital to risk weighted    assets:
CapStar Financial Holdings, Inc.		200,738		11.61			77,814		4.50		N/A		N/A
CapStar Bank		173,180		10.02			77,791		4.50			112,364		6.50
Tier I capital to average assets:
CapStar Financial Holdings, Inc.		209,738		11.06			75,867		4.00		N/A		N/A
CapStar Bank		189,680		10.01			75,828		4.00			94,785		5.00

(1) For the calendar year 2019, the Company must maintain a capital conservation buffer of Tier 1 common equity capital in excess of minimum risk-based capital ratios by at least 2.5% to avoid limits on capital distributions and certain discretionary bonus payments to executive officers and similar employees.

(2) For the Company to be well-capitalized, the Bank must be well-capitalized and the Company must not be subject to any written agreement, order, capital directive, or prompt corrective action directive issued by the Federal Reserve to meet and maintain a specific capital level for any capital measure.

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Fair Value

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value

NOTE 13 – FAIR VALUE

Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:

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

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

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

The Bank used the following methods and significant assumptions to estimate fair value:

Investment Securities: The fair values for investment securities are determined by quoted market prices, if available (Level 1). For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2), using matrix pricing. Matrix pricing is a mathematical technique commonly used to price debt securities that are not actively traded and, values debt securities by relying on quoted prices for the specific securities and the securities’ relationship to other benchmark quoted securities (Level 2 inputs). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows or other market indicators (Level 3). See below for additional discussion of Level 3 valuation methodologies and significant inputs. The fair values of all securities are determined from third party pricing services without adjustment.

Other Real Estate Owned: Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals which are updated no less frequently than annually. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach with data from comparable properties. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Appraisals may be adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and/or management’s expertise and knowledge of the collateral. Such adjustments result in a Level 3 classification of the inputs for determining fair value. Real estate owned properties are evaluated on a quarterly basis for additional impairment and adjusted accordingly.  The Company had no other real estate owned carried at fair value as of September 30, 2019 or December 31, 2018.

Loans Held For Sale: Loans held for sale are carried at either fair value, if elected, or the lower of cost or fair value on a pool-level basis. Origination fees and costs for loans held for sale recorded at lower of cost or market are capitalized in the basis of the loan and are included in the calculation of realized gains and losses upon sale.  Origination fees and costs are recognized in earnings at the time of origination for loans held for sale that are recorded at fair value.  Fair value is determined using quoted prices for similar assets, adjusted for specific attributes of that loan or other observable market data, such as outstanding commitments from third party investors (Level 2).  There were no loans held for sale carried at fair value at December 31, 2018.

Impaired Loans: The fair value of impaired loans with specific allocations of the allowance for loan losses is generally based on recent appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available for similar loans and collateral underlying such loans. Such adjustments result in a Level 3 classification of the inputs for determining fair value. Collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Impaired loans are evaluated on at least a quarterly basis for additional impairment and adjusted in accordance with the loan policy.

Derivatives-Interest Rate Swaps: The fair values of derivatives are based on valuation models using observable market data as of the measurement date (Level 2). The Bank’s derivatives are traded in an over-the-counter market where quoted market prices are not always available. Therefore, the fair values of derivatives are determined using quantitative models that utilize multiple market inputs. The inputs will vary based on the type of derivative, but could include interest rates, prices and indices to generate continuous yield or pricing curves, prepayment rates, and volatility factors to value the position. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services.  The fair values of all interest rate swaps are determined from third party pricing services without adjustment.

Derivatives-Mortgage Loan Interest Rate Lock Commitments:  Interest rate lock commitments that relate to the origination of mortgage loans that will be held for sale are recorded at fair value, determined as the amount that would be required to settle each derivative instrument at the balance sheet date. The fair value of the interest rate lock commitment is derived from the fair value of related mortgage loans, which is based on observable market data and includes the expected net future cash flows related to servicing of the loans.  In estimating the fair value of an interest rate lock commitment, the Company assigns a probability to the interest rate lock commitment based on an expectation that it will be exercised and the loan will be funded (a “pull through” rate).  The expected pull through rates are applied to the fair value of the unclosed mortgage pipeline, resulting in a Level 3 fair value classification. The pull through rate is a statistical analysis of our actual rate lock fallout history to determine the sensitivity of the residential mortgage loan pipeline compared to interest rate changes and other deterministic values. New market prices are applied based on updated loan characteristics and new fallout ratios (i.e., the inverse of the pull through rate) are applied accordingly. Significant increases (decreases) in the pull through rate in isolation result in a significantly higher (lower) fair value measurement. Changes to the fair value of interest rate lock commitments are recognized based on interest rate changes, changes in the probability that the commitment will be exercised, and the passage of time.

Derivatives-Mortgage-Backed Securities Forward Sales Commitments: The Company utilizes mortgage-backed securities forward sales commitments to hedge mortgage loan interest rate lock commitments.  Mortgage-backed securities forward sales commitments are recorded at fair value based on quoted prices for similar assets in an active market with inputs that are observable, resulting in a Level 2 fair value classification.

Assets and liabilities measured at fair value on a recurring basis are summarized below (dollars in thousands):

	Fair value measurements at September 30, 2019
				Quoted prices
				in active		Significant
				markets for		other			Significant
				identical		observable			unobservable
	Carrying			assets		inputs			inputs
	Value			(Level 1)		(Level 2)			(Level 3)
Assets:
Securities available-for-sale:
U.S. government-sponsored agencies	$	9,230		$	—	$	9,230		$	—
Obligations of states and political subdivisions		51,443			—		51,443			—
Mortgage-backed securities-residential		129,691			—		129,691			—
Asset-backed securities		3,233			—		3,233			—
Other debt securities		9,903			—		9,903			—
Loans held for sale		45,988			—		45,988			—
Derivative assets:
Non-hedging derivatives:
Interest rate swaps - customer related		909			—		909			—
Mortgage loan interest rate lock commitments		807			—		—			807
Liabilities:
Derivative liabilities:
Non-hedging derivatives:
Interest rate swaps - customer related		(909	)		—		(909	)		—
Mortgage-backed securities forward sales commitments		83			—		83			—

	Fair value measurements at December 31, 2018
				Quoted prices
				in active		Significant
				markets for		other			Significant
				identical		observable			unobservable
	Carrying			assets		inputs			inputs
	Value			(Level 1)		(Level 2)			(Level 3)
Assets:
Securities available-for-sale:
U.S. government-sponsored agencies	$	10,706		$	—	$	10,706		$	—
Obligations of states and political subdivisions		61,926			—		61,926			—
Mortgage-backed securities-residential		144,158			—		144,158			—
Asset-backed securities		15,284			—		15,284			—
Other debt securities		11,734			—		11,734			—
Derivative assets:
Non-hedging derivatives:
Interest rate swaps - customer related		494			—		494			—
Liabilities:
Derivative liabilities:
Cash flow hedges:
Interest rate swaps - cash flow hedges		(836	)		—		(836	)		—
Non-hedging derivatives:
Interest rate swaps - customer related		(494	)		—		(494	)		—

The table below presents a reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Mortgage Loan Interest Rate
	Lock Commitments
	2019		2018
Balance of recurring Level 3 assets at January 1st	$	—	$	—
Total gains or losses for the period:
Included in mortgage banking income		807		—
Balance of recurring Level 3 assets at September 30th	$	807	$	—

The following table presents quantitative information about recurring Level 3 fair value measurements at September 30, 2019 (dollars in thousands).  There were no Level 3 fair value measurements at December 31, 2018.

					Range
	Fair		Valuation		(Weighted-
September 30, 2019	Value		Technique(s)	Unobservable Input(s)	Average)
Assets:
Non-hedging derivatives:
Mortgage loan interest rate lock commitments	$	807	Consensus pricing	Origination pull-through rate	69% - 98% (85%)

There were no assets measured at fair value on a nonrecurring basis at September 30, 2019 and December 31, 2018.

Fair Value of Financial Instruments

The carrying value and estimated fair values of the Bank’s financial instruments at September 30, 2019 and December 31, 2018 were as follows (dollars in thousands):

	September 30, 2019				December 31, 2018
	Carrying				Carrying				Fair value
	amount		Fair value		amount		Fair value		level of input
Financial assets:
Cash and due from banks, interest-bearing deposits in    financial institutions	$	154,021	$	154,021	$	94,681	$	94,681	Level 1
Federal funds sold		—		—		10,762		10,762	Level 1
Securities available-for-sale		203,500		203,500		243,808		243,808	Level 2
Securities held-to-maturity		3,319		3,412		3,734		3,785	Level 2
Loans held for sale		129,613		131,156		57,618		58,596	Level 2
Restricted equity securities		13,900	N/A			12,038	N/A		N/A
Loans		1,411,768		1,405,664		1,429,794		1,442,082	Level 3
Accrued interest receivable		5,780		5,780		5,964		5,964	Level 2
Other assets		35,523		35,523		34,489		34,489	Level 2 / Level 3
Financial liabilities:
Deposits		1,731,763		1,733,122		1,570,008		1,572,880	Level 3
Federal Home Loan Bank advances		10,000		10,030		125,000		126,548	Level 2
Other liabilities		1,552		1,552		2,753		2,753	Level 3

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

(a) Cash and Due from Banks, Interest-Bearing Deposits in Financial Institutions

For these short‑term instruments, the carrying amount is a reasonable estimate of fair value.

(b) Federal Funds Sold

Federal funds sold clear on a daily basis. For this reason, the carrying amount is a reasonable estimate of fair value.

(c) Restricted Equity Securities

It is not practical to determine the fair value of restricted securities due to restrictions placed on their transferability.

(d) Loans

In accordance with the adoption of ASU 2016-01, the fair value of loans is measured using an exit price notion.  Fair values for impaired loans are estimated using discounted cash flow models or based on the fair value of the underlying collateral.

(e) Accrued Interest Receivable

The carrying amounts of accrued interest approximate fair value.

(f) Other Assets

Included in other assets are bank owned life insurance and certain interest rate swap agreements. The fair values of interest rate swap agreements are based on independent pricing services that utilize pricing models with observable market inputs. For bank owned life insurance, the carrying amount is based on the cash surrender value and is a reasonable estimate of fair value.

(g) Deposits

The fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand at the reporting date. The fair value of certificates of deposit is estimated by discounted cash flow models, using current market interest rates offered on certificates with similar remaining maturities.

(h) Federal Home Loan Bank Advances

The fair value of fixed rate Federal Home Loan Bank Advances is estimated using discounted cash flow models, using current market interest rates offered on certificates, advances and other borrowings with similar remaining maturities.

(i) Other Liabilities

Included in other liabilities are accrued interest payable and certain interest rate swap agreements. The fair values of interest rate swap agreements are based on independent pricing services that utilize pricing models with observable market inputs.  The carrying amounts of accrued interest approximate fair value.

(j) Off-Balance Sheet Instruments

Fair values for off-balance sheet, credit-related financial instruments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the counterparties’ credit standing.  The fair value of commitments is not material.

(k) Limitations

Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instruments. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Bank’s entire holdings of a particular instrument. Because no market exists for a significant portion of the Bank’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

Fair value estimates are based on estimating on and off‑balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. For example, fixed assets are not considered financial instruments and their value has not been incorporated into the fair value estimates. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

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Loans and Allowance for Loan Losses (Tables)

9 Months Ended

Sep. 30, 2019

Receivables [Abstract]

Summary of Loan Portfolio

A summary of the loan portfolio as of September 30, 2019 and December 31, 2018 follows (dollars in thousands):

	September 30, 2019			December 31, 2018
Commercial real estate	$	576,748		$	550,446
Consumer real estate		254,736			253,562
Construction and land development		132,222			174,670
Commercial and industrial		382,816			404,600
Consumer		29,059			25,615
Other		36,187			20,901
Total		1,411,768			1,429,794
Allowance for loan losses		(12,828	)		(12,113	)
Total loans, net	$	1,398,940		$	1,417,681

Summary of Loan Balance by Category as well as Risk Rating

The following tables present the loan balances by category as well as risk rating (dollars in thousands):

	Non-impaired Loans
September 30, 2019	Pass/Watch		Special Mention		Substandard		Total Non-impaired		TotalImpaired Loans		Total
Commercial real estate	$	563,862	$	6,631	$	3,635	$	574,128	$	2,620	$	576,748
Consumer real estate		249,952		1,656		1,806		253,414		1,322		254,736
Construction and land development		132,036		49		17		132,102		120		132,222
Commercial and industrial		364,003		12,950		4,285		381,238		1,578		382,816
Consumer		28,997		7		20		29,024		35		29,059
Other		36,187		—		—		36,187		—		36,187
Total	$	1,375,037	$	21,293	$	9,763	$	1,406,093	$	5,675	$	1,411,768
December 31, 2018
Commercial real estate	$	547,616	$	177	$	1,262	$	549,055	$	1,391	$	550,446
Consumer real estate		249,273		1,676		1,691		252,640		922		253,562
Construction and land development		174,591		52		19		174,662		8		174,670
Commercial and industrial		388,719		7,790		6,545		403,054		1,546		404,600
Consumer		25,556		1		27		25,584		31		25,615
Other		20,901		—		—		20,901		—		20,901
Total	$	1,406,656	$	9,696	$	9,544	$	1,425,896	$	3,898	$	1,429,794

Summary of Changes and Breakdown of Allowance for Loan Losses and Loan Portfolio by Loan Category

The following tables detail the changes in the ALL for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Commercial real estate			Consumer real estate			Construction and land development		Commercial and industrial			Consumer			Other			Total
Three Months Ended September 30, 2019
Balance, beginning of period	$	3,922		$	1,142		$	1,733	$	5,518		$	166		$	422		$	12,903
Charged-off loans		—			—			—		(282	)		(30	)		(20	)		(332	)
Recoveries		4			2			—		356			18			2			382
Provision for loan losses		(36	)		101			209		(468	)		53			16			(125	)
Balance, end of period	$	3,890		$	1,245		$	1,942	$	5,124		$	207		$	420		$	12,828
Three Months Ended September 30, 2018
Balance, beginning of period	$	3,551		$	1,057		$	1,764	$	7,779		$	120		$	434		$	14,705
Charged-off loans		—			—			—		—			—			—			—
Recoveries		6			1			—		22			3			—			32
Provision for loan losses		(412	)		(75	)		449		767			(30	)		(218	)		481
Balance, end of period	$	3,145		$	983		$	2,213	$	8,568		$	93		$	216		$	15,218

	Commercial real estate			Consumer real estate			Construction and land development			Commercial and industrial			Consumer			Other			Total
Nine Months Ended September 30, 2019
Balance, beginning of period	$	3,309		$	1,005		$	2,431		$	5,036		$	105		$	227		$	12,113
Charged-off loans		—			—			—			(308	)		(109	)		(115	)		(532	)
Recoveries		16			18			—			371			60			21			486
Provision for loan losses		565			222			(489	)		25			151			287			761
Balance, end of period	$	3,890		$	1,245		$	1,942		$	5,124		$	207		$	420		$	12,828
Nine Months Ended September 30, 2018
Balance, beginning of period	$	3,324		$	1,063		$	1,628		$	7,209		$	91		$	406		$	13,721
Charged-off loans		—			—			—			(226	)		(25	)		—			(251	)
Recoveries		16			4			—			348			52			—			420
Provision for loan losses		(195	)		(84	)		585			1,237			(25	)		(190	)		1,328
Balance, end of period	$	3,145		$	983		$	2,213		$	8,568		$	93		$	216		$	15,218

A breakdown of the ALL and the loan portfolio by loan category at September 30, 2019 and December 31, 2018 follows (dollars in thousands):

	Commercial real estate		Consumer real estate		Construction and land development		Commercial and industrial		Consumer		Other		Total
September 30, 2019
Allowance for Loan Losses:
Collectively evaluated for impairment	$	3,890	$	1,245	$	1,942	$	5,124	$	207	$	420	$	12,828
Individually evaluated for impairment		—		—		—		—		—		—		—
Acquired with deteriorated credit quality		—		—		—		—		—		—		—
Balances, end of period	$	3,890	$	1,245	$	1,942	$	5,124	$	207	$	420	$	12,828
Loans:
Collectively evaluated for impairment	$	574,128	$	253,414	$	132,102	$	381,238	$	29,024	$	36,187	$	1,406,093
Individually evaluated for impairment		2,510		664		115		740		11		—		4,040
Acquired with deteriorated credit quality		110		658		5		838		24		—		1,635
Balances, end of period	$	576,748	$	254,736	$	132,222	$	382,816	$	29,059	$	36,187	$	1,411,768
December 31, 2018
Allowance for Loan Losses:
Collectively evaluated for impairment	$	3,309	$	1,005	$	2,431	$	5,036	$	105	$	227	$	12,113
Individually evaluated for impairment		—		—		—		—		—		—		—
Acquired with deteriorated credit quality		—		—		—		—		—		—		—
Balances, end of period	$	3,309	$	1,005	$	2,431	$	5,036	$	105	$	227	$	12,113
Loans:
Collectively evaluated for impairment	$	549,055	$	252,640	$	174,662	$	403,054	$	25,584	$	20,901	$	1,425,896
Individually evaluated for impairment		1,278		183		—		817		—		—		2,278
Acquired with deteriorated credit quality		113		739		8		729		31		—		1,620
Balances, end of period	$	550,446	$	253,562	$	174,670	$	404,600	$	25,615	$	20,901	$	1,429,794

Allocation of ALL with Corresponding Percentage of ALL in Each Category to Total Loans, Net of Deferred Fee

The following table presents the allocation of the ALL for each respective loan category with the corresponding percentage of the ALL in each category to total loans, net of deferred fees as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	September 30, 2019					December 31, 2018
	Amount		Percent of total loans			Amount		Percent of total loans
Commercial real estate	$	3,890		0.28	%	$	3,309		0.23	%
Consumer real estate		1,245		0.09			1,005		0.07
Construction and land development		1,942		0.14			2,431		0.17
Commercial and industrial		5,124		0.36			5,036		0.35
Consumer		207		0.01			105		0.01
Other		420		0.03			227		0.02
Total allowance for loan losses	$	12,828		0.91	%	$	12,113		0.85	%

Summary of Impaired Loans

The following table presents the Company’s impaired loans that were evaluated for specific loss allowance as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	September 30, 2019						December 31, 2018
	Recorded investment		Unpaid principal balance		Related allowance		Recorded investment		Unpaid principal balance		Related allowance
With no related allowance recorded:
Commercial real estate	$	2,620	$	2,937	$	—	$	1,391	$	1,775	$	—
Consumer real estate		1,322		1,747		—		922		1,204		—
Construction and land development		120		149		—		8		18		—
Commercial and industrial		1,578		7,009		—		1,546		6,350		—
Consumer		35		64		—		31		56		—
Other		—		—		—		—		—		—
Subtotal		5,675		11,906		—		3,898		9,403		—
With an allowance recorded:
Commercial real estate		—		—		—		—		—		—
Consumer real estate		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—
Commercial and industrial		—		—		—		—		—		—
Consumer		—		—		—		—		—		—
Other		—		—		—		—		—		—
Subtotal		—		—		—		—		—		—
Total	$	5,675	$	11,906	$	—	$	3,898	$	9,403	$	—

The following table presents information related to the average recorded investment and interest income recognized on impaired loans for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Three Months Ended				Three Months Ended				Nine Months Ended				Nine Months Ended
	September 30, 2019				September 30, 2018				September 30, 2019				September 30, 2018
	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
With no related allowance recorded:
Commercial real estate	$	2,578	$	42	$	1,159	$	15	$	2,588	$	125	$	1,189	$	25
Consumer real estate		1,175		10		92		—		1,230		43		92		3
Construction and land development		115		—		—		—		124		4		—		—
Commercial and industrial		1,257		18		—		—		1,553		63		—		—
Consumer		25		—		100		—		37		2		100		3
Other		—		—		—		—		—		—		—		—
Subtotal		5,150		70		1,351		15		5,532		237		1,381		31
With an allowance recorded:
Commercial real estate		—		—		—		—		—		—		—		—
Consumer real estate		—		—		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—		—		—
Commercial and industrial		—		—		5,419		—		—		—		5,369		118
Consumer		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
Subtotal		—		—		5,419		—		—		—		5,369		118
Total	$	5,150	$	70	$	6,770	$	15	$	5,532	$	237	$	6,750	$	149

Schedule of Aging of Recorded Investment in Past-due Loans, by Class of Loans

The following table presents the aging of the recorded investment in past-due loans as of September 30, 2019 and December 31, 2018 by class of loans (dollars in thousands):

	30 - 59		60 - 89		Greater Than
	Days		Days		89 Days		Total		Loans Not
	Past Due		Past Due		Past Due		Past Due		Past Due		Total
September 30, 2019
Commercial real estate	$	216	$	1,227	$	—	$	1,443	$	575,305	$	576,748
Consumer real estate		885		403		1,083		2,371		252,365		254,736
Construction and land development		—		—		—		—		132,222		132,222
Commercial and industrial		4,459		18		591		5,068		377,748		382,816
Consumer		129		6		13		148		28,911		29,059
Other		293		—		—		293		35,894		36,187
Total	$	5,982	$	1,654	$	1,687	$	9,323	$	1,402,445	$	1,411,768
December 31, 2018
Commercial real estate	$	300	$	227	$	—	$	527	$	549,919	$	550,446
Consumer real estate		69		75		775		919		252,643		253,562
Construction and land development		—		—		—		—		174,670		174,670
Commercial and industrial		54		—		—		54		404,546		404,600
Consumer		52		—		43		95		25,520		25,615
Other		—		—		—		—		20,901		20,901
Total	$	475	$	302	$	818	$	1,595	$	1,428,199	$	1,429,794

Schedule of Recorded In Non Accrual Loans, Past Due Loans over 89 Days Outstanding and Accruing and Troubled Debt Restructurings

The following table presents the recorded investment in non-accrual loans, past due loans over 89 days outstanding and accruing and troubled debt restructurings (“TDR”) by class of loans as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	Non-Accrual		Past Due Over 89 Days and Accruing		Troubled Debt Restructurings
September 30, 2019
Commercial real estate	$	—	$	—	$	2,454
Consumer real estate		1,098		293		—
Construction and land development		120		—		—
Commercial and industrial		458		258		271
Consumer		25		—		—
Other		—		—		—
Total	$	1,701	$	551	$	2,725
December 31, 2018
Commercial real estate	$	—	$	—	$	1,391
Consumer real estate		1,187		214		—
Construction and land development		19		—		—
Commercial and industrial		817		—		—
Consumer		55		—		—
Other		—		—		—
Total	$	2,078	$	214	$	1,391

Schedule of Loans by Class Modified as TDR

The following table presents loans by class modified as TDR that occurred during the three and nine months ended September 30, 2019 (dollars in thousands).

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	Number of contracts		Pre modification outstanding recorded investment		Post modification outstanding recorded investment, net of related allowance		Number of contracts		Pre modification outstanding recorded investment		Post modification outstanding recorded investment, net of related allowance
2019
Commercial real estate		1	$	1,228	$	1,228		1	$	1,228	$	1,228
Consumer real estate		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—
Commercial and industrial		1		271		271		1		271		271
Consumer		—		—		—		—		—		—
Other		—		—		—		—		—		—
Total		2	$	1,499	$	1,499		2	$	1,499	$	1,499

Schedule of activity in purchased credit impaired loans

The following table presents changes in the carrying value of purchased credit impaired (“PCI”) loans (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
Balance at beginning of period	$	1,537	$	1,620
Change due to payments received and accretion		98		15
Change due to loan charge-offs		—		—
Other		—		—
Balance at end of period	$	1,635	$	1,635

The following table presents changes in the accretable yield for PCI loans (in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Balance at beginning of period	$	405		$	440
Accretion		(145	)		(190	)
Reclassification from (to) nonaccretable difference		370			370
Other, net		—			10
Balance at end of period	$	630		$	630

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Schedule of Financial Instruments Representing Credit Risk

The following table sets forth outstanding financial instruments whose contract amounts represent credit risk as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	Contract or notional amount
	September 30, 2019		December 31, 2018
Financial instruments whose contract amounts represent    credit risk:
Unused commitments to extend credit	$	707,228	$	707,675
Standby letters of credit		10,415		12,273
Total	$	717,643	$	719,948

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Loans and Allowance for Loan Losses - Schedule of Aging of Recorded Investment in Past-due Loans, by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 9,323	$ 1,595
Loans Not Past Due	1,402,445	1,428,199
Total	1,411,768	1,429,794
Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,443	527
Loans Not Past Due	575,305	549,919
Total	576,748	550,446
Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,371	919
Loans Not Past Due	252,365	252,643
Total	254,736	253,562
Construction and land development
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	132,222	174,670
Total	132,222	174,670
Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	5,068	54
Loans Not Past Due	377,748	404,546
Total	382,816	404,600
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	148	95
Loans Not Past Due	28,911	25,520
Total	29,059	25,615
Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	293
Loans Not Past Due	35,894	20,901
Total	36,187	20,901
30 - 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	5,982	475
30 - 59 Days Past Due | Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	216	300
30 - 59 Days Past Due | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	885	69
30 - 59 Days Past Due | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	4,459	54
30 - 59 Days Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	129	52
30 - 59 Days Past Due | Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	293
60 - 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,654	302
60 - 89 Days Past Due | Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,227	227
60 - 89 Days Past Due | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	403	75
60 - 89 Days Past Due | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	18
60 - 89 Days Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	6
Greater than 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,687	818
Greater than 89 Days Past Due | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,083	775
Greater than 89 Days Past Due | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	591
Greater than 89 Days Past Due | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 13	$ 43

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Loans and Allowance for Loan Losses - Summary of Breakdown of Allowance for Loan Losses and Loan Portfolio by Loan Category (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Allowance for Loan Losses:
Collectively evaluated for impairment	$ 12,828		$ 12,113
Allowance for Loan Losses, Ending Balance	12,828	$ 12,903	12,113	$ 15,218	$ 14,705	$ 13,721
Loans:
Collectively evaluated for impairment	1,406,093		1,425,896
Individually evaluated for impairment	4,040		2,278
Acquired with deteriorated credit quality	1,635		1,620
Total	1,411,768		1,429,794
Commercial real estate
Allowance for Loan Losses:
Collectively evaluated for impairment	3,890		3,309
Allowance for Loan Losses, Ending Balance	3,890	3,922	3,309	3,145	3,551	3,324
Loans:
Collectively evaluated for impairment	574,128		549,055
Individually evaluated for impairment	2,510		1,278
Acquired with deteriorated credit quality	110		113
Total	576,748		550,446
Consumer real estate
Allowance for Loan Losses:
Collectively evaluated for impairment	1,245		1,005
Allowance for Loan Losses, Ending Balance	1,245	1,142	1,005	983	1,057	1,063
Loans:
Collectively evaluated for impairment	253,414		252,640
Individually evaluated for impairment	664		183
Acquired with deteriorated credit quality	658		739
Total	254,736		253,562
Construction and land development
Allowance for Loan Losses:
Collectively evaluated for impairment	1,942		2,431
Allowance for Loan Losses, Ending Balance	1,942	1,733	2,431	2,213	1,764	1,628
Loans:
Collectively evaluated for impairment	132,102		174,662
Individually evaluated for impairment	115
Acquired with deteriorated credit quality	5		8
Total	132,222		174,670
Commercial and industrial
Allowance for Loan Losses:
Collectively evaluated for impairment	5,124		5,036
Allowance for Loan Losses, Ending Balance	5,124	5,518	5,036	8,568	7,779	7,209
Loans:
Collectively evaluated for impairment	381,238		403,054
Individually evaluated for impairment	740		817
Acquired with deteriorated credit quality	838		729
Total	382,816		404,600
Consumer
Allowance for Loan Losses:
Collectively evaluated for impairment	207		105
Allowance for Loan Losses, Ending Balance	207	166	105	93	120	91
Loans:
Collectively evaluated for impairment	29,024		25,584
Individually evaluated for impairment	11
Acquired with deteriorated credit quality	24		31
Total	29,059		25,615
Other
Allowance for Loan Losses:
Collectively evaluated for impairment	420		227
Allowance for Loan Losses, Ending Balance	420	$ 422	227	$ 216	$ 434	$ 406
Loans:
Collectively evaluated for impairment	36,187		20,901
Total	$ 36,187		$ 20,901

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Loans and Allowance for Loan Losses - Summary of Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Loans And Leases Receivable Disclosure [Line Items]
Total loans	$ 1,411,768		$ 1,429,794
Allowance for loan losses	(12,828)	$ (12,903)	(12,113)	$ (15,218)	$ (14,705)	$ (13,721)
Loans, net	1,398,940		1,417,681
Commercial real estate
Loans And Leases Receivable Disclosure [Line Items]
Total loans	576,748		550,446
Allowance for loan losses	(3,890)	(3,922)	(3,309)	(3,145)	(3,551)	(3,324)
Consumer real estate
Loans And Leases Receivable Disclosure [Line Items]
Total loans	254,736		253,562
Allowance for loan losses	(1,245)	(1,142)	(1,005)	(983)	(1,057)	(1,063)
Construction and land development
Loans And Leases Receivable Disclosure [Line Items]
Total loans	132,222		174,670
Allowance for loan losses	(1,942)	(1,733)	(2,431)	(2,213)	(1,764)	(1,628)
Commercial and industrial
Loans And Leases Receivable Disclosure [Line Items]
Total loans	382,816		404,600
Allowance for loan losses	(5,124)	(5,518)	(5,036)	(8,568)	(7,779)	(7,209)
Consumer
Loans And Leases Receivable Disclosure [Line Items]
Total loans	29,059		25,615
Allowance for loan losses	(207)	(166)	(105)	(93)	(120)	(91)
Other
Loans And Leases Receivable Disclosure [Line Items]
Total loans	36,187		20,901
Allowance for loan losses	$ (420)	$ (422)	$ (227)	$ (216)	$ (434)	$ (406)

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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 17,001	$ 10,363
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan losses	761	1,328
Accretion of discounts on acquired loans and deferred fees	(1,908)	(948)
Depreciation and amortization	2,192	303
Net amortization of premiums on investment securities	577	803
Net (gain) loss on sale of securities	108	(2)
Mortgage banking income	$ (7,151)	$ (4,329)
Type of Revenue [Extensible List]	us-gaap:MortgageBankingMember	us-gaap:MortgageBankingMember
Tri-Net fees	$ (2,511)	$ (1,227)
Net gain on sale of loans	(823)	(6)
Net gain on sale of other real estate owned	(3)
Stock-based compensation	1,035	940
Deferred income tax expense	874	406
Origination of loans held for sale	(594,982)	(395,851)
Proceeds from loans held for sale	532,649	425,007
Net increase in accrued interest receivable and other assets	(10,625)	(1,974)
Net increase in accrued interest payable and other liabilities	10,979	1,766
Net cash provided by (used in) operating activities	(51,827)	36,579
Activities in securities available-for-sale:
Purchases	(27,342)	(22,127)
Sales	54,133	5,778
Maturities, prepayments and calls	19,460	14,611
Activities in securities held-to-maturity:
Maturities, prepayments and calls	396
Purchase of restricted equity securities	(1,862)	(11)
Net decrease (increase) in loans	20,661	(125,216)
Purchase of premises and equipment	(1,520)	(3,980)
Proceeds from sale of other real estate owned	127
Net cash provided by (used in) investing activities	64,053	(130,945)
Cash flows from financing activities:
Net increase in deposits	161,755	6,537
Proceeds from Federal Home Loan Bank advances	75,000	110,000
Payments on Federal Home Loan Bank advances	(190,000)	(55,000)
Repurchase of common stock	(7,836)
Exercise of common stock options and warrants, net of repurchase of restricted shares	1,509	3,129
Common and preferred stock dividends paid	(2,573)	(508)
Termination of interest rate swap agreement	(1,503)
Net cash provided by financing activities	36,352	64,158
Net increase (decrease) in cash and cash equivalents	48,578	(30,208)
Cash and cash equivalents at beginning of period	105,443	82,797
Cash and cash equivalents at end of period	154,021	52,589
Supplemental disclosures of cash paid:
Interest paid	18,565	10,624
Income taxes	314	942
Cash paid for operating lease liabilities	1,338	1,216
Supplemental disclosures of noncash transactions:
Transfer of loans to other real estate	50
Loans charged off to the allowance for loan losses	532	$ 251
Conversion of preferred stock and non-voting common stock	$ 1,011

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Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Securities held to maturity, fair value	$ 3,412,000	$ 3,785,000
Loans held for sale carried at fair value	$ 45,988,000	$ 0
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	878,048
Preferred stock, shares outstanding	0	878,048
Voting
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	18,343,403	17,592,160
Common stock, shares outstanding	18,343,403	17,592,160
Nonvoting
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares issued	0	132,561
Common stock, shares outstanding	0	132,561

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Derivatives - Additional Information (Details) - Designated as Hedging Instrument - Interest Rate Swaps - Cash Flow Hedges - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Notional amounts	$ 0			$ 20,000,000
Derivative termination fees	1,500,000
Investment securities pledged collateral to counterparties				$ 2,000,000
Investment securities pledged collateral from counterparties	$ 0
Gains (losses) relating to mortgage banking derivative instruments		$ 0	$ 0

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Derivatives - Summary of Amount and Fair Value of Mortgage Banking Derivative Instruments Included in Consolidated Balance Sheets (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Other Assets | Mortgage Loan Interest Rate Lock Commitments
Derivative [Line Items]
Notional amount, assets	$ 67,565
Estimated fair value, asset	807
Other Liabilities | Mortgage-Backed Securities Forward Sales Commitments
Derivative [Line Items]
Notional amount, liabilities	53,500
Estimated fair value, liabilities	$ (83)

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Derivatives (Tables)

9 Months Ended

Sep. 30, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summary of Interest-Rate Swaps Designated as Cash Flow Hedges

Summary information about the interest-rate swaps designated as cash flow hedges was as follows (dollars in thousands):

	September 30, 2019		December 31, 2018
Notional amounts	$	—	$	20,000
Weighted average pay rates		—		3.54	%
Weighted average receive rates		—	3 month LIBOR
Weighted average maturity		—	4.5 years
Fair value	$	—	$	(836	)
Amount of unrealized loss recognized in accumulated    other comprehensive income, net of tax	$	—	$	(617	)

Summary of Customer Related Interest Rate Swaps

A summary of the Company’s customer related interest rate swaps was as follows (dollars in thousands):

	September 30, 2019					December 31, 2018
	Notional		Estimated			Notional		Estimated
	amount		fair value			amount		fair value
Interest rate swap agreements:
Pay fixed/receive variable swaps	$	27,487	$	(905	)	$	29,126	$	24
Pay variable/receive fixed swaps		27,487		905			29,126		(24	)
Total	$	54,974	$	—		$	58,252	$	—

Summary of Net Gains (Losses) Relating to Mortgage Banking Derivative Instruments Included in Mortgage Banking Income

The net gains (losses) relating to mortgage banking derivative instruments included in mortgage banking income were as follows (dollars in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Mortgage loan interest rate lock commitments	$	214		$	807
Mortgage-backed securities forward sales commitments		(311	)		(664	)
Total	$	(97	)	$	143

Summary of Amount and Fair Value of Mortgage Banking Derivative Instruments Included in Consolidated Balance Sheets

The amount and fair value of mortgage banking derivatives included in the consolidated balance sheets was as follows (dollars in thousands):

	September 30, 2019					December 31, 2018
	Notional		Estimated			Notional		Estimated
	amount		fair value			amount		fair value
Included in other assets:
Mortgage loan interest rate lock commitments	$	67,565	$	807		$	—	$	—
Included in other liabilities:
Mortgage-backed securities forward sales commitments	$	53,500	$	(83	)	$	—	$	—

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited consolidated financial statements as of and for the period ended September 30, 2019 include CapStar Financial Holdings, Inc. and its wholly owned subsidiary, CapStar Bank (the “Bank”, together referred to as the “Company”). Significant intercompany transactions and accounts are eliminated in consolidation.

The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and do not include all information and footnotes required by U.S. generally accepted accounting principles (“U.S. GAAP”) for complete financial statements. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods presented have been included.  These unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and related notes appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, determination of impairment of intangible assets, including goodwill, the valuation of our investment portfolio, loans held for sale, derivative assets and liabilities, deferred tax assets and estimated liabilities.  

Loans Held For Sale and Fair Value Option

Loans Held For Sale and Fair Value Option

The Company classifies loans as loans held for sale when originated with the intent to sell.  As of April 1, 2019, the Company elected the fair value option for all residential mortgage loans originated with the intent to sell. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting.  The Company has not elected the fair value option for other loans held for sale primarily because they are not economically hedged using derivative instruments. The fair value of residential mortgage loans originated with the intent to sell is based on traded market prices of similar assets. Other loans held for sale that are recorded at lower of cost or fair value may be carried at fair value on a nonrecurring basis when the fair value is less than cost. For further information, see Note 13 - Fair Value.  The Company does not securitize mortgage loans.  If the Company sells loans with servicing rights retained, the carrying value of the mortgage loan sold is reduced by the amount allocated to the servicing right.   Fair values of residential mortgage loans held for sale are based on traded market prices of similar assets. The changes in fair value are recorded as a component of mortgage banking income and included gains (losses) of $(0.2) million and $0.7 million for the three and nine months ended September 30, 2019, respectively. There were no loans held for sale recorded at fair value as of December 31, 2018. The following table summarizes the difference between the fair value and the aggregate unpaid principal balance for residential real estate loans held for sale as of September 30, 2019 (dollars in thousands):

	Fair Value		Aggregate Unpaid Principal Balance		Difference
September 30, 2019
Residential mortgage loans held for sale	$	45,988	$	45,296	$	692

$0.2 million of residential mortgage loans held for sale were greater than 89 days past due and accruing or on nonaccrual status as of September 30, 2019. There were no residential mortgage loans held for sale greater than 89 days past due and accruing or on nonaccrual status as of December 31, 2018.

Subsequent Events

Subsequent Events

Accounting Standards Codification (“ASC”) 855, Subsequent Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued. The Company evaluated all events or transactions that occurred after September 30, 2019 through the date of the issued financial statements.

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Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Summary of Lease Costs

Lease costs were as follows (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
Operating lease cost	$	464	$	1,402
Short-term lease cost		—		—
Variable least cost		—		—
Total lease cost	$	464	$	1,402

Maturity Analysis of Operating Lease Liabilities and Reconciliation of Undiscounted Cash Flows

A maturity analysis of operating lease liabilities and reconciliation of the undiscounted cash flows to the total operating lease liability is as follows (in thousands):

	September 30, 2019
Lease payments due:
2019 (excluding the nine months ended September 30, 2019)	$	382
2020		1,539
2021		1,567
2022		1,453
2023		1,402
2024 and thereafter		8,820
Total undiscounted cash flows		15,163
Discount on cash flows		(2,545	)
Total lease liability	$	12,618

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Loans and Allowance for Loan Losses - Summary of Changes in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 12,903	$ 14,705	$ 12,113	$ 13,721
Charged-off loans	(332)		(532)	(251)
Recoveries	382	32	486	420
Provision for loan losses	(125)	481	761	1,328
Ending Balance	12,828	15,218	12,828	15,218
Commercial real estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	3,922	3,551	3,309	3,324
Recoveries	4	6	16	16
Provision for loan losses	(36)	(412)	565	(195)
Ending Balance	3,890	3,145	3,890	3,145
Consumer real estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,142	1,057	1,005	1,063
Recoveries	2	1	18	4
Provision for loan losses	101	(75)	222	(84)
Ending Balance	1,245	983	1,245	983
Construction and land development
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,733	1,764	2,431	1,628
Provision for loan losses	209	449	(489)	585
Ending Balance	1,942	2,213	1,942	2,213
Commercial and industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	5,518	7,779	5,036	7,209
Charged-off loans	(282)		(308)	(226)
Recoveries	356	22	371	348
Provision for loan losses	(468)	767	25	1,237
Ending Balance	5,124	8,568	5,124	8,568
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	166	120	105	91
Charged-off loans	(30)		(109)	(25)
Recoveries	18	3	60	52
Provision for loan losses	53	(30)	151	(25)
Ending Balance	207	93	207	93
Other
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	422	434	227	406
Charged-off loans	(20)		(115)
Recoveries	2		21
Provision for loan losses	16	(218)	287	(190)
Ending Balance	$ 420	$ 216	$ 420	$ 216

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Securities - Summary of Amortized Cost and Fair Value of Debt and Equity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale, Amortized cost [Abstract]
Due in less than one year	$ 7,881
Due one to five years	28,994
Due five to ten years	31,353
Due beyond ten years	195
Amortized Cost	200,124	$ 247,042
Available-for-sale, Estimated fair value [Abstract]
Due in less than one year	7,963
Due one to five years	29,698
Due five to ten years	32,721
Due beyond ten years	194
Estimated fair value	203,500	243,808
Held-to-maturity, Amortized cost [Abstract]
Due in less than one year	881
Due one to five years	2,438
Amortized Cost	3,319	3,734
Securities held to maturity [Abstract]
Due in less than one year	884
Due one to five years	2,528
Estimated fair value	3,412	3,785
Mortgage-backed securities
Available-for-sale, Amortized cost [Abstract]
Amortized cost	128,332
Amortized Cost	128,332	146,547
Available-for-sale, Estimated fair value [Abstract]
Estimated fair value	129,691
Estimated fair value	129,691	144,158
Asset-backed securities
Available-for-sale, Amortized cost [Abstract]
Amortized cost	3,369
Amortized Cost	3,369	15,437
Available-for-sale, Estimated fair value [Abstract]
Estimated fair value	3,233
Estimated fair value	$ 3,233	$ 15,284

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Loans and Allowance for Loan Losses - Summary of Average Recorded Investment and Interest Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Average recorded investment	$ 5,150	$ 1,351	$ 5,532	$ 1,381
Impaired loans with no related allowance recorded, Interest income recognized	70	15	237	31
Impaired loans with an allowance recorded, Average recorded investment		5,419		5,369
Impaired loans with an allowance recorded, Interest income recognized				118
Average recorded investment	5,150	6,770	5,532	6,750
Interest income recognized	70	15	237	149
Commercial real estate
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Average recorded investment	2,578	1,159	2,588	1,189
Impaired loans with no related allowance recorded, Interest income recognized	42	15	125	25
Consumer real estate
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Average recorded investment	1,175	92	1,230	92
Impaired loans with no related allowance recorded, Interest income recognized	10		43	3
Construction and land development
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Average recorded investment	115		124
Impaired loans with no related allowance recorded, Interest income recognized			4
Commercial and industrial
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Average recorded investment	1,257		1,553
Impaired loans with no related allowance recorded, Interest income recognized	18		63
Impaired loans with an allowance recorded, Average recorded investment		5,419		5,369
Impaired loans with an allowance recorded, Interest income recognized				118
Consumer
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Average recorded investment	$ 25	$ 100	37	100
Impaired loans with no related allowance recorded, Interest income recognized			$ 2	$ 3

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Derivatives - Summary of Interest-Rate Swaps Designated as Cash Flow Hedges (Details) - Designated as Hedging Instrument - Cash Flow Hedges - Interest Rate Swaps - USD ($)	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2019
Derivative [Line Items]
Notional amounts	$ 20,000,000	$ 0
Weighted average pay rates	3.54%
Weighted average receive rates	3 month LIBOR
Weighted average maturity	4 years 6 months
Fair value	$ (836,000)
Amount of unrealized loss recognized in accumulated other comprehensive income, net of tax	$ (617,000)

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Stock Options and Restricted Shares - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Apr. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 2.2
Total fair value of shares vested	$ 1.0	$ 1.9
Vesting period	4 years
Contractual term	10 years
Options granted	50,000		0
Unrecognized compensation cost	$ 0.2
Restricted Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost expected to be recognized over a weighted-average period	1 year 8 months 12 days
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cost expected to be recognized over a weighted-average period	2 years 7 months 6 days
CapStar Bank 2008 Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of stock reserved for issuance of stock incentives	1,569,475
Shares issuable under both restricted share and stock option grants	357,852
CapStar Bank 2008 Stock Incentive Plan | Board of Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of stock reserved for issuance of stock incentives				400,000

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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock, Voting	Common Stock, Nonvoting	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2017	$ 146,946	$ 878	$ 11,450	$ 133	$ 118,120	$ 18,892	$ (2,527)
Beginning balance, shares at Dec. 31, 2017			11,449,465	132,561
Net issuance of restricted common stock	(329)		$ 25		(354)
Net issuance of restricted common stock, shares			24,729
Stock-based compensation expense	305				305
Net exercise of common stock options	300		$ 62		238
Net exercise of common stock options, shares			61,822
Exercise of common stock warrants	942		$ 104		838
Exercise of common stock warrants, shares			104,781
Net income	3,194					3,194
Other comprehensive income (loss)	(2,666)						(2,666)
Ending balance at Mar. 31, 2018	148,692	878	$ 11,641	$ 133	119,147	22,086	(5,193)
Ending balance, shares at Mar. 31, 2018			11,640,797	132,561
Beginning balance at Dec. 31, 2017	146,946	878	$ 11,450	$ 133	118,120	18,892	(2,527)
Beginning balance, shares at Dec. 31, 2017			11,449,465	132,561
Net income	10,363
Other comprehensive income (loss)	(3,354)						(2,778)
Ending balance at Sep. 30, 2018	157,510	878	$ 11,993	$ 133	121,646	28,741	(5,881)
Ending balance, shares at Sep. 30, 2018			11,992,561	132,561
Beginning balance at Mar. 31, 2018	148,692	878	$ 11,641	$ 133	119,147	22,086	(5,193)
Beginning balance, shares at Mar. 31, 2018			11,640,797	132,561
Net issuance of restricted common stock	(24)		$ 5		(29)
Net issuance of restricted common stock, shares			5,419
Stock-based compensation expense	325				325
Net exercise of common stock options	897		$ 106		791
Net exercise of common stock options, shares			106,550
Exercise of common stock warrants	368		$ 47		321
Exercise of common stock warrants, shares			45,804
Common and preferred dividends declared	(514)					(514)
Net income	3,513					3,513
Other comprehensive income (loss)	(111)						(111)
Ending balance at Jun. 30, 2018	153,146	878	$ 11,799	$ 133	120,555	25,085	(5,304)
Ending balance, shares at Jun. 30, 2018			11,798,570	132,561
Net issuance of restricted common stock	(67)		$ (7)		(60)
Net issuance of restricted common stock, shares			(6,953)
Stock-based compensation expense	310				310
Net exercise of common stock options	746		$ 166		580
Net exercise of common stock options, shares			165,354
Exercise of common stock warrants	296		$ 35		261
Exercise of common stock warrants, shares			35,590
Net income	3,656					3,656
Other comprehensive income (loss)	(577)						(577)
Ending balance at Sep. 30, 2018	157,510	878	$ 11,993	$ 133	121,646	28,741	(5,881)
Ending balance, shares at Sep. 30, 2018			11,992,561	132,561
Beginning balance at Dec. 31, 2018	254,379	878	$ 17,592	$ 133	211,789	27,303	(3,316)
Beginning balance, shares at Dec. 31, 2018			17,592,160	132,561
Net issuance of restricted common stock	(168)		$ 14		(182)
Net issuance of restricted common stock, shares			13,801
Stock-based compensation expense	344				344
Net exercise of common stock options	1,180		$ 182		998
Net exercise of common stock options, shares			182,002
Repurchase of common stock	(2,431)		$ (155)		(2,276)
Repurchase of common stock, shares			(155,400)
Common and preferred dividends declared	(744)					(744)
Net income	4,779					4,779
Other comprehensive income (loss)	2,412						2,412
Ending balance at Mar. 31, 2019	259,751	878	$ 17,633	$ 133	210,673	31,338	(904)
Ending balance, shares at Mar. 31, 2019			17,632,563	132,561
Beginning balance at Dec. 31, 2018	$ 254,379	878	$ 17,592	$ 133	211,789	27,303	(3,316)
Beginning balance, shares at Dec. 31, 2018			17,592,160	132,561
Net exercise of common stock options, shares	257,954
Net income	$ 17,001
Other comprehensive income (loss)	4,588						3,502
Ending balance at Sep. 30, 2019	268,082		$ 18,343		206,757	41,710	1,272
Ending balance, shares at Sep. 30, 2019			18,343,403
Beginning balance at Mar. 31, 2019	259,751	878	$ 17,633	$ 133	210,673	31,338	(904)
Beginning balance, shares at Mar. 31, 2019			17,632,563	132,561
Net issuance of restricted common stock	(13)		$ (7)		(6)
Net issuance of restricted common stock, shares			(6,826)
Stock-based compensation expense	340				340
Net exercise of common stock options	74		$ 23		51
Net exercise of common stock options, shares			22,778
Repurchase of common stock	(3,405)		$ (220)		(3,185)
Repurchase of common stock, shares			(219,600)
Common and preferred dividends declared	(929)					(929)
Net income	5,756					5,756
Other comprehensive income (loss)	1,090						1,090
Ending balance at Jun. 30, 2019	262,664	878	$ 17,429	$ 133	207,873	36,165	186
Ending balance, shares at Jun. 30, 2019			17,428,915	132,561
Net issuance of restricted common stock	(34)		$ (6)		(28)
Net issuance of restricted common stock, shares			(5,335)
Stock-based compensation expense	351				351
Net exercise of common stock options	470		$ 39		431
Net exercise of common stock options, shares			39,000
Conversion of preferred stock to common stock		$ (878)	$ 878
Conversion of preferred stock to common stock, shares			878,048
Conversion of non-voting common stock to common stock			$ 133	$ (133)
Conversion of non-voting common stock to common stock, shares			132,561	(132,561)
Repurchase of common stock	(2,000)		$ (130)		(1,870)
Repurchase of common stock, shares			(129,786)
Common and preferred dividends declared	(921)					(921)
Net income	6,466					6,466
Other comprehensive income (loss)	1,086						1,086
Ending balance at Sep. 30, 2019	$ 268,082		$ 18,343		$ 206,757	$ 41,710	$ 1,272
Ending balance, shares at Sep. 30, 2019			18,343,403

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Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 24,289	$ 17,967
Interest-bearing deposits in financial institutions	129,732	76,714
Federal funds sold		10,762
Total cash and cash equivalents	154,021	105,443
Securities available-for-sale, at fair value	203,500	243,808
Securities held-to-maturity, fair value of $3,412, and $3,785 at September 30, 2019 and December 31, 2018, respectively	3,319	3,734
Loans held for sale (includes $45,988 and $0 measured at fair value at September 30, 2019 and December 31, 2018, respectively)	129,613	57,618
Loans	1,411,768	1,429,794
Less allowance for loan losses	(12,828)	(12,113)
Loans, net	1,398,940	1,417,681
Premises and equipment, net	19,416	18,821
Restricted equity securities	13,900	12,038
Accrued interest receivable	5,780	5,964
Goodwill	37,510	37,510
Core deposit intangible, net	7,280	8,538
Other real estate owned, net	914	988
Other assets	59,718	51,740
Total assets	2,033,911	1,963,883
Deposits:
Non-interest-bearing	352,266	289,552
Interest-bearing	562,516	434,921
Savings and money market accounts	509,753	497,108
Time	307,228	348,427
Total deposits	1,731,763	1,570,008
Federal Home Loan Bank advances	10,000	125,000
Other liabilities	24,066	14,496
Total liabilities	1,765,829	1,709,504
Shareholders’ equity:
Series A convertible preferred stock, $1 par value; 5,000,000 shares authorized; 0 and 878,048 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively		878
Additional paid-in capital	206,757	211,789
Retained earnings	41,710	27,303
Accumulated other comprehensive income (loss), net of income tax	1,272	(3,316)
Total shareholders’ equity	268,082	254,379
Total liabilities and shareholders’ equity	2,033,911	1,963,883
Voting
Shareholders’ equity:
Common stock	$ 18,343	17,592
Nonvoting
Shareholders’ equity:
Common stock		$ 133

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Accumulated Other Comprehensive Income (Loss) - Summary of Significant Amounts Reclassified out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Net gain (loss) on sale of securities							$ (108)	$ 2
Interest expense - Federal Home Loan Bank advances	$ (127)			$ (698)			(1,281)	(1,813)
Income tax benefit	(2,072)			(554)			(5,231)	(1,702)
Net income	6,466	$ 5,756	$ 4,779	3,656	$ 3,513	$ 3,194	17,001	10,363
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Losses on Cash Flow Hedges
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Interest expense money market	(212)			(111)			(436)	(330)
Interest expense - Federal Home Loan Bank advances	(53)			(108)			(191)	(368)
Income tax benefit				16			9	56
Net income	$ (265)			(203)			(618)	(642)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Available for Sale Securities
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Net gain (loss) on sale of securities				(1)			(108)	2
Income tax benefit							28	(1)
Net income				$ (1)			$ (80)	1
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Losses on Securities Transferred to Held to Maturity
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Interest income - securities								14
Income tax benefit								(4)
Net income								$ 10

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Loans and Allowance for Loan Losses - Schedule of Loans by Class Modified as TDR (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) Contract	Sep. 30, 2018 Contract	Sep. 30, 2019 USD ($) Contract	Sep. 30, 2018 Contract
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	2	0	2	0
Pre modification outstanding recorded investment	$ 1,499		$ 1,499
Post modification outstanding recorded investment, net of related allowance	$ 1,499		$ 1,499
Commercial real estate
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	1		1
Pre modification outstanding recorded investment	$ 1,228		$ 1,228
Post modification outstanding recorded investment, net of related allowance	$ 1,228		$ 1,228
Commercial and industrial
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	1		1
Pre modification outstanding recorded investment	$ 271		$ 271
Post modification outstanding recorded investment, net of related allowance	$ 271		$ 271

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Leases - Maturity Analysis of Operating Lease Liabilities and Reconciliation of Undiscounted Cash Flows (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Lease payments due:
2019 (excluding the nine months ended September 30, 2019)	$ 382
2020	1,539
2021	1,567
2022	1,453
2023	1,402
2024 and thereafter	8,820
Total undiscounted cash flows	15,163
Discount on cash flows	(2,545)
Operating lease, liability	$ 12,618

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Fair Value - Additional Information (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other real estate owned	$ 0	$ 0
Loans held for sale carried at fair value	45,988,000	0
Fair Value, Nonrecurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of assets on nonrecurring basis	$ 0	$ 0

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Stock Options and Restricted Shares - Information Related to Stock Options (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Intrinsic value of options exercised	$ 2,208,930	$ 4,282,055
Cash received from option exercises	1,723,704	5,144,090
Tax benefit realized from option exercises	$ 37,468	$ 1,119,329
Weighted average fair value of options granted	$ 5.35

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2019

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

NOTE 6 – ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following were changes in accumulated other comprehensive income (loss) by component, net of tax, for the nine months ended September 30, 2019 and 2018 (dollars in thousands):

				Unrealized Gains			Unrealized
	Gains and			and Losses			Losses on
	Losses on			on Available			Securities
	Cash Flow			for Sale			Transferred to
	Hedges			Securities			Held to Maturity			Total
Nine Months Ended September 30, 2019
Beginning Balance	$	(2,636	)	$	(680	)	$	—		$	(3,316	)
Other comprehensive income (loss) before    reclassification, net of tax		325			4,961			—			5,286
Amounts reclassified from accumulated other    comprehensive income (loss), net of tax		(618	)		(80	)		—			(698	)
Net current period other comprehensive income (loss)		(293	)		4,881			—			4,588
Ending Balance	$	(2,929	)	$	4,201		$	—		$	1,272
Nine Months Ended September 30, 2018
Beginning Balance	$	(3,679	)	$	1,162		$	(10	)	$	(2,527	)
Other comprehensive income (loss) before     reclassification, net of tax		1,800			(4,521	)		—			(2,721	)
Amounts reclassified from accumulated other    comprehensive income (loss), net of tax		(642	)		(1	)		10			(633	)
Net current period other comprehensive income (loss)		1,158			(4,522	)		10			(3,354	)
Ending Balance	$	(2,521	)	$	(3,360	)	$	—		$	(5,881	)

The following were significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

													Affected Line Item
Details about Accumulated Other	Three Months Ended September 30,						Nine Months Ended September 30,						in the Statement Where
Comprehensive Income (Loss) Components	2019			2018			2019			2018			Net Income is Presented
Unrealized losses on cash flow hedges	$	(212	)	$	(111	)	$	(436	)	$	(330	)	Interest expense - money market
		(53	)		(108	)		(191	)		(368	)	Interest expense - Federal Home Loan Bank advances
		—			16			9			56		Income tax benefit
	$	(265	)	$	(203	)	$	(618	)	$	(642	)	Net of tax
Unrealized gains (losses) on available-   for-sale securities	$	—		$	(1	)	$	(108	)	$	2		Net gain (loss) on sale of securities
		—			—			28			(1	)	Income tax benefit
	$	—		$	(1	)	$	(80	)	$	1		Net of tax
Unrealized losses on securities   transferred to held-to-maturity	$	—		$	—		$	—		$	14		Interest income - securities
		—			—			—			(4	)	Income tax benefit
	$	—		$	—		$	—		$	10		Net of tax

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Stock Options and Restricted Shares

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Options and Restricted Shares

NOTE 10 - STOCK OPTIONS AND RESTRICTED SHARES

During 2008, the board of directors of the Bank approved the CapStar Bank 2008 Stock Incentive Plan. Following the formation of CapStar Financial Holdings, Inc. in 2016, and in connection with the Share Exchange, the outstanding awards of restricted stock and stock options under the CapStar Bank 2008 Stock Incentive Plan were exchanged for similar awards of restricted stock and stock options issued by CapStar Financial Holdings, Inc. under the CapStar Financial Holdings, Inc. Stock Incentive Plan (the “Plan”), which the board of directors adopted in 2016. The Stock Incentive Plan provides for the grant of stock-based incentives, including stock options, restricted stock units, performance awards and restricted stock, to employees, directors and service providers that are subject to forfeiture until vesting conditions have been satisfied by the award recipient under the terms of the award.  The Plan is intended to help align the interests of employees and our shareholders and reward our employees for improved Company performance.  The Plan reserved 1,569,475 shares of stock for issuance of stock incentives. In April 2018 the board of directors reserved an additional 400,000 shares of stock for issuance of stock incentives.  Stock incentives include both restricted share and stock option grants.  Total shares issuable under the plan were 357,852 at September 30, 2019.

The Company has recognized stock-based compensation expense, within salaries and employee benefits for employees, and within other non-interest expense for directors, in the consolidated statements of income as follows (dollars in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2019			2018			2019			2018
Stock-based compensation expense before income taxes	$	351		$	310		$	1,035		$	940
Less: deferred tax benefit		(92	)		(81	)		(271	)		(246	)
Reduction of net income	$	259		$	229		$	764		$	694

Restricted Shares

Compensation expense is recognized over the vesting period of the awards based on the fair value of the stock at the issue date. The fair value of each restricted stock grant is based on valuations performed by independent consultants. The recipients have the right to vote and receive dividends but cannot sell, transfer, assign, pledge, hypothecate, or otherwise encumber the restricted stock until the shares have vested. Restricted shares fully vest on the third anniversary of the grant date.  A summary of the changes in the Company’s nonvested restricted shares for the nine months ended September 30, 2019 follows:

				Weighted
				Average
	Restricted			Grant Date
Nonvested Shares	Shares			Fair Value
Nonvested at beginning of period		157,616		$	17.00
Granted		31,683			15.86
Vested		(64,178	)		15.17
Forfeited		(16,635	)		17.87
Nonvested at end of period		108,486		$	17.62

As of September 30, 2019, there was $2.2 million of unrecognized compensation cost related to nonvested shares granted under the Plan.  The cost is expected to be recognized over a weighted-average period of 1.7 years.  The total fair value of shares vested during the nine months ended September 30, 2019 and 2018 was $1.0 million and $1.9 million, respectively.

Stock Options

Option awards are generally granted with an exercise price equal to the fair value of the Company’s common stock at the date of grant.  Option awards generally have a four year vesting period and a ten year contractual term.

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model that uses the assumptions noted in the table below. Expected volatility is based on historical volatilities of the Company’s common stock. The expected term of options granted was calculated using the “simplified” method for plain vanilla options. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. There were no options granted in 2018.  The Company granted 50,000 options during 2019.

The fair value of options granted during 2019 was determined using the following weighted average assumptions as of the grant date.

	2019
Dividend yield		1.35	%
Expected term (in years)		6.50
Expected stock price volatility		29.55	%
Risk-free interest rate		2.25	%

A summary of the activity in stock options for the nine months ended September 30, 2019 follows:

						Weighted
				Weighted		Average
				Average		Remaining
				Exercise		Contractual
	Shares			Price		Term (years)
Outstanding at beginning of period		507,903		$	8.66
Granted		50,000			14.84
Exercised		(257,954	)		7.34
Forfeited or expired		—			—
Outstanding at end of period		299,949		$	10.83		5.0
Fully vested and expected to vest		299,668		$	10.83		5.0
Exercisable at end of period		243,699		$	9.95		4.0

Information related to stock options during each year follows:

	2019		2018
Intrinsic value of options exercised	$	2,208,930	$	4,282,055
Cash received from option exercises		1,723,704		5,144,090
Tax benefit realized from option exercises		37,468		1,119,329
Weighted average fair value of options granted		5.35		—

As of September 30, 2019, there was $0.2 million of unrecognized compensation cost related to nonvested stock options granted under the Plan.  The cost is expected to be recognized over a weighted-average period of 2.6 years.

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Summary of Significant Accounting Policies - Additional Information (Details) - Residential mortgage loans held for sale - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Mortgage banking income (loss)	$ (200,000)	$ 700,000
Residential mortgage loans held for sale	45,988,000	45,988,000	$ 0
Greater than 89 Days Past Due
Summary Of Significant Accounting Policies [Line Items]
Mortgage loans past due over 89 days and accruing or nonaccrual	$ 200,000	$ 200,000	$ 0

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Stock Options and Restricted Shares (Tables)

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Company Recognized Stock-Based Compensation Expense

The Company has recognized stock-based compensation expense, within salaries and employee benefits for employees, and within other non-interest expense for directors, in the consolidated statements of income as follows (dollars in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2019			2018			2019			2018
Stock-based compensation expense before income taxes	$	351		$	310		$	1,035		$	940
Less: deferred tax benefit		(92	)		(81	)		(271	)		(246	)
Reduction of net income	$	259		$	229		$	764		$	694

Summary of Changes in Company's Nonvested Restricted Shares

A summary of the changes in the Company’s nonvested restricted shares for the nine months ended September 30, 2019 follows:

				Weighted
				Average
	Restricted			Grant Date
Nonvested Shares	Shares			Fair Value
Nonvested at beginning of period		157,616		$	17.00
Granted		31,683			15.86
Vested		(64,178	)		15.17
Forfeited		(16,635	)		17.87
Nonvested at end of period		108,486		$	17.62

Summary of Fair Value of Options Granted Using Weighted Average Assumptions

The fair value of options granted during 2019 was determined using the following weighted average assumptions as of the grant date.

	2019
Dividend yield		1.35	%
Expected term (in years)		6.50
Expected stock price volatility		29.55	%
Risk-free interest rate		2.25	%

Summary of Activity in Stock Options

A summary of the activity in stock options for the nine months ended September 30, 2019 follows:

						Weighted
				Weighted		Average
				Average		Remaining
				Exercise		Contractual
	Shares			Price		Term (years)
Outstanding at beginning of period		507,903		$	8.66
Granted		50,000			14.84
Exercised		(257,954	)		7.34
Forfeited or expired		—			—
Outstanding at end of period		299,949		$	10.83		5.0
Fully vested and expected to vest		299,668		$	10.83		5.0
Exercisable at end of period		243,699		$	9.95		4.0

Information Related to Stock Options

Information related to stock options during each year follows:

	2019		2018
Intrinsic value of options exercised	$	2,208,930	$	4,282,055
Cash received from option exercises		1,723,704		5,144,090
Tax benefit realized from option exercises		37,468		1,119,329
Weighted average fair value of options granted		5.35		—

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Securities - Additional Information (Details) $ in Millions	Sep. 30, 2019 USD ($) Security	Dec. 31, 2018 Security
Schedule Of Available For Sale Securities [Line Items]
Unrealized losses in investment securities portfolio	$ 0.7
Unrealized loss position | Security	45	127
Public Deposits, Derivative Positions and Federal Home Loan Bank Advances
Schedule Of Available For Sale Securities [Line Items]
Market value of securities	$ 80.6

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Securities (Tables)

9 Months Ended

Sep. 30, 2019

Investments Debt And Equity Securities [Abstract]

Summary of Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities

The amortized cost and fair value of securities available-for-sale and held-to-maturity at September 30, 2019 and December 31, 2018 are summarized as follows (dollars in thousands):

	September 30, 2019									December 31, 2018
	Amortized Cost		Gross unrealized gains		Gross unrealized (losses)			Estimated fair value		Amortized Cost		Gross unrealized gains		Gross unrealized (losses)			Estimated fair value
Securities available-for-sale:
U. S. government agency securities	$	9,241	$	13	$	(24	)	$	9,230	$	11,053	$	—	$	(347	)	$	10,706
State and municipal securities		49,369		2,094		(20	)		51,443		62,142		765		(981	)		61,926
Mortgage-backed securities		128,332		1,828		(469	)		129,691		146,547		776		(3,165	)		144,158
Asset-backed securities		3,369		—		(136	)		3,233		15,437		4		(157	)		15,284
Other debt securities		9,813		106		(16	)		9,903		11,863		71		(200	)		11,734
Total	$	200,124	$	4,041	$	(665	)	$	203,500	$	247,042	$	1,616	$	(4,850	)	$	243,808
Securities held-to-maturity:
State and municipal securities	$	3,319	$	93	$	—		$	3,412	$	3,734	$	54	$	(3	)	$	3,785
Total	$	3,319	$	93	$	—		$	3,412	$	3,734	$	54	$	(3	)	$	3,785

Summary of Securities with Unrealized Losses and Length of Time Continuous Loss Positions

Security fair values are established by an independent pricing service as of the dates indicated. The difference between amortized cost and fair value reflects current interest rates and represents the potential gain (loss) had the portfolio been liquidated on those dates. Security gains (losses) are realized only in the event of dispositions prior to maturity or other-than-temporary impairment. Securities with unrealized losses as of September 30, 2019 and December 31, 2018, and the length of time they were in continuous loss positions as of such dates are as follows (dollars in thousands):

	Less than 12 months					12 months or more					Total
September 30, 2019	Estimated fair value		Gross unrealized losses			Estimated fair value		Gross unrealized losses			Estimated fair value		Gross unrealized losses
U. S. government agency securities	$	1,990	$	(3	)	$	1,660	$	(21	)	$	3,650	$	(24	)
State and municipal securities		2,358		(11	)		816		(9	)		3,174		(20	)
Mortgage-backed securities		16,791		(51	)		36,151		(418	)		52,942		(469	)
Asset-backed securities		3,233		(136	)		—		—			3,233		(136	)
Other debt securities		—		—			1,487		(16	)		1,487		(16	)
Total temporarily impaired securities	$	24,372	$	(201	)	$	40,114	$	(464	)	$	64,486	$	(665	)
December 31, 2018
U. S. government agency securities	$	—	$	—		$	10,706	$	(347	)	$	10,706	$	(347	)
State and municipal securities		13,455		(212	)		17,376		(772	)		30,831		(984	)
Mortgage-backed securities		7,075		(17	)		87,232		(3,148	)		94,307		(3,165	)
Asset-backed securities		8,262		(145	)		2,439		(12	)		10,701		(157	)
Other debt securities		5,362		(200	)		—		—			5,362		(200	)
Total temporarily impaired securities	$	34,154	$	(574	)	$	117,753	$	(4,279	)	$	151,907	$	(4,853	)

Summary of Sale of Debt and Equity Securities

Results from sales of debt and equity securities were as follows (dollars in thousands):

	Nine Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2018
Proceeds	$	54,133		$	5,778
Gross gains		370			107
Gross losses		(478	)		(105	)

Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

The amortized cost and fair value of securities at September 30, 2019, by contractual maturity, are shown below (dollars in thousands). Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.

	Available-for-sale				Held-to-maturity
	Amortized cost		Estimated fair value		Amortized cost		Estimated fair value
Due in less than one year	$	7,881	$	7,963	$	881	$	884
Due one to five years		28,994		29,698		2,438		2,528
Due five to ten years		31,353		32,721		—		—
Due beyond ten years		195		194		—		—
Mortgage-backed securities		128,332		129,691		—		—
Asset-backed securities		3,369		3,233		—		—
Total	$	200,124	$	203,500	$	3,319	$	3,412

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2019

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax

The following were changes in accumulated other comprehensive income (loss) by component, net of tax, for the nine months ended September 30, 2019 and 2018 (dollars in thousands):

				Unrealized Gains			Unrealized
	Gains and			and Losses			Losses on
	Losses on			on Available			Securities
	Cash Flow			for Sale			Transferred to
	Hedges			Securities			Held to Maturity			Total
Nine Months Ended September 30, 2019
Beginning Balance	$	(2,636	)	$	(680	)	$	—		$	(3,316	)
Other comprehensive income (loss) before    reclassification, net of tax		325			4,961			—			5,286
Amounts reclassified from accumulated other    comprehensive income (loss), net of tax		(618	)		(80	)		—			(698	)
Net current period other comprehensive income (loss)		(293	)		4,881			—			4,588
Ending Balance	$	(2,929	)	$	4,201		$	—		$	1,272
Nine Months Ended September 30, 2018
Beginning Balance	$	(3,679	)	$	1,162		$	(10	)	$	(2,527	)
Other comprehensive income (loss) before     reclassification, net of tax		1,800			(4,521	)		—			(2,721	)
Amounts reclassified from accumulated other    comprehensive income (loss), net of tax		(642	)		(1	)		10			(633	)
Net current period other comprehensive income (loss)		1,158			(4,522	)		10			(3,354	)
Ending Balance	$	(2,521	)	$	(3,360	)	$	—		$	(5,881	)

Summary of Significant Amounts Reclassified out off Accumulated Other Comprehensive Income (Loss)

The following were significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

													Affected Line Item
Details about Accumulated Other	Three Months Ended September 30,						Nine Months Ended September 30,						in the Statement Where
Comprehensive Income (Loss) Components	2019			2018			2019			2018			Net Income is Presented
Unrealized losses on cash flow hedges	$	(212	)	$	(111	)	$	(436	)	$	(330	)	Interest expense - money market
		(53	)		(108	)		(191	)		(368	)	Interest expense - Federal Home Loan Bank advances
		—			16			9			56		Income tax benefit
	$	(265	)	$	(203	)	$	(618	)	$	(642	)	Net of tax
Unrealized gains (losses) on available-   for-sale securities	$	—		$	(1	)	$	(108	)	$	2		Net gain (loss) on sale of securities
		—			—			28			(1	)	Income tax benefit
	$	—		$	(1	)	$	(80	)	$	1		Net of tax
Unrealized losses on securities   transferred to held-to-maturity	$	—		$	—		$	—		$	14		Interest income - securities
		—			—			—			(4	)	Income tax benefit
	$	—		$	—		$	—		$	10		Net of tax

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Commitments and Contingencies - Schedule of Financial Instruments Representing Credit Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Unused commitments to extend credit	$ 707,228	$ 707,675
Standby letters of credit	10,415	12,273
Total	$ 717,643	$ 719,948

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited consolidated financial statements as of and for the period ended September 30, 2019 include CapStar Financial Holdings, Inc. and its wholly owned subsidiary, CapStar Bank (the “Bank”, together referred to as the “Company”). Significant intercompany transactions and accounts are eliminated in consolidation.

The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and do not include all information and footnotes required by U.S. generally accepted accounting principles (“U.S. GAAP”) for complete financial statements. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods presented have been included.  These unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and related notes appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses, determination of impairment of intangible assets, including goodwill, the valuation of our investment portfolio, loans held for sale, derivative assets and liabilities, deferred tax assets and estimated liabilities.  

Loans Held For Sale and Fair Value Option

The Company classifies loans as loans held for sale when originated with the intent to sell.  As of April 1, 2019, the Company elected the fair value option for all residential mortgage loans originated with the intent to sell. This election allows for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting.  The Company has not elected the fair value option for other loans held for sale primarily because they are not economically hedged using derivative instruments. The fair value of residential mortgage loans originated with the intent to sell is based on traded market prices of similar assets. Other loans held for sale that are recorded at lower of cost or fair value may be carried at fair value on a nonrecurring basis when the fair value is less than cost. For further information, see Note 13 - Fair Value.  The Company does not securitize mortgage loans.  If the Company sells loans with servicing rights retained, the carrying value of the mortgage loan sold is reduced by the amount allocated to the servicing right.   Fair values of residential mortgage loans held for sale are based on traded market prices of similar assets. The changes in fair value are recorded as a component of mortgage banking income and included gains (losses) of $(0.2) million and $0.7 million for the three and nine months ended September 30, 2019, respectively. There were no loans held for sale recorded at fair value as of December 31, 2018. The following table summarizes the difference between the fair value and the aggregate unpaid principal balance for residential real estate loans held for sale as of September 30, 2019 (dollars in thousands):

	Fair Value		Aggregate Unpaid Principal Balance		Difference
September 30, 2019
Residential mortgage loans held for sale	$	45,988	$	45,296	$	692

$0.2 million of residential mortgage loans held for sale were greater than 89 days past due and accruing or on nonaccrual status as of September 30, 2019. There were no residential mortgage loans held for sale greater than 89 days past due and accruing or on nonaccrual status as of December 31, 2018.

Subsequent Events

Accounting Standards Codification (“ASC”) 855, Subsequent Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued. The Company evaluated all events or transactions that occurred after September 30, 2019 through the date of the issued financial statements.

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Derivatives - Summary of Net Gains (Losses) Relating to Mortgage Banking Derivative Instruments Included in Mortgage Banking Income (Details) - Mortgage Banking Derivative Instruments - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Derivative [Line Items]
Net gains (losses) relating to mortgage banking derivative instruments	$ (97)	$ 143
Mortgage Loan Interest Rate Lock Commitments
Derivative [Line Items]
Net gains (losses) relating to mortgage banking derivative instruments	214	807
Mortgage-Backed Securities Forward Sales Commitments
Derivative [Line Items]
Net gains (losses) relating to mortgage banking derivative instruments	$ (311)	$ (664)

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Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income:
Loans, including fees	$ 21,005	$ 14,167	$ 62,596	$ 40,197
Securities:
Taxable	1,028	951	3,540	2,775
Tax-exempt	354	248	1,093	784
Federal funds sold	1	17	26	56
Restricted equity securities	183	132	584	389
Interest-bearing deposits in financial institutions	645	267	1,502	679
Total interest income	23,216	15,782	69,341	44,880
Interest expense:
Interest-bearing deposits	2,102	1,146	5,523	2,793
Savings and money market accounts	1,944	1,409	5,445	3,827
Time deposits	1,887	985	5,917	2,468
Federal funds purchased		1	4	3
Securities sold under agreements to repurchase			5
Federal Home Loan Bank advances	127	698	1,281	1,813
Total interest expense	6,060	4,239	18,175	10,904
Net interest income	17,156	11,543	51,166	33,976
Provision for loan losses	(125)	481	761	1,328
Net interest income after provision for loan losses	17,281	11,062	50,405	32,648
Noninterest income:
Noninterest income			7,151	4,329
Net gain (loss) on sale of securities		(1)	(108)	2
Tri-Net fees	847	373	2,511	1,227
Other noninterest income	2,474	684	6,602	2,157
Total noninterest income	6,788	3,218	18,555	9,072
Noninterest expense:
Salaries and employee benefits	9,229	6,514	26,224	19,111
Data processing and software	1,790	803	5,126	2,411
Professional fees	528	255	1,571	1,074
Occupancy	858	544	2,550	1,600
Equipment	1,012	520	2,890	1,661
Regulatory fees	18	228	564	664
Merger related expenses	187	540	2,491	875
Amortization of intangibles	408	3	1,258	23
Other operating	1,501	663	4,054	2,236
Total noninterest expense	15,531	10,070	46,728	29,655
Income before income taxes	8,538	4,210	22,232	12,065
Income tax expense	2,072	554	5,231	1,702
Net income	$ 6,466	$ 3,656	$ 17,001	$ 10,363
Per share information:
Basic net income per share of common stock	$ 0.36	$ 0.30	$ 0.96	$ 0.87
Diluted net income per share of common stock	$ 0.35	$ 0.28	$ 0.91	$ 0.79
Weighted average shares outstanding:
Basic	17,741,778	12,040,229	17,729,518	11,851,476
Diluted	18,532,479	13,113,775	18,670,280	13,052,758
Treasury Management And Other Deposit Service Charges
Noninterest income:
Noninterest income	$ 788	$ 528	$ 2,399	$ 1,357
Mortgage Banking Income
Noninterest income:
Noninterest income	$ 2,679	$ 1,634	$ 7,151	$ 4,329

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Stock Options and Restricted Shares - Summary of Changes in Company's Nonvested Restricted Shares (Details)	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Restricted Shares, Abstract
Restricted Shares, Nonvested Beginning Balance | shares	157,616
Restricted Shares, Granted | shares	31,683
Restricted Shares, Vested | shares	(64,178)
Restricted Shares, Forfeited | shares	(16,635)
Restricted Shares, Nonvested Ending Balance | shares	108,486
Weighted Average Grant Date Fair Value, Abstract
Weighted Average Grant Date Fair Value, Nonvested Beginning Balance | $ / shares	$ 17.00
Weighted Average Grant Date Fair Value, Granted | $ / shares	15.86
Weighted Average Grant Date Fair Value, Vested | $ / shares	15.17
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	17.87
Weighted Average Grant Date Fair Value, Nonvested Ending Balance | $ / shares	$ 17.62

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Loans and Allowance for Loan Losses - Allocation of ALL with Corresponding Percentage of ALL in Each Category to Total Loans, Net of Deferred Fee (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan losses, Amount	$ 12,828	$ 12,903	$ 12,113	$ 15,218	$ 14,705	$ 13,721
Allowance for loan losses, Percentage of total loans	0.91%		0.85%
Commercial real estate
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan losses, Amount	$ 3,890	3,922	$ 3,309	3,145	3,551	3,324
Allowance for loan losses, Percentage of total loans	0.28%		0.23%
Consumer real estate
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan losses, Amount	$ 1,245	1,142	$ 1,005	983	1,057	1,063
Allowance for loan losses, Percentage of total loans	0.09%		0.07%
Construction and land development
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan losses, Amount	$ 1,942	1,733	$ 2,431	2,213	1,764	1,628
Allowance for loan losses, Percentage of total loans	0.14%		0.17%
Commercial and industrial
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan losses, Amount	$ 5,124	5,518	$ 5,036	8,568	7,779	7,209
Allowance for loan losses, Percentage of total loans	0.36%		0.35%
Consumer
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan losses, Amount	$ 207	166	$ 105	93	120	91
Allowance for loan losses, Percentage of total loans	0.01%		0.01%
Other
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan losses, Amount	$ 420	$ 422	$ 227	$ 216	$ 434	$ 406
Allowance for loan losses, Percentage of total loans	0.03%		0.02%

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Loans and Allowance for Loan Losses - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) Contract	Sep. 30, 2018 USD ($) Contract	Sep. 30, 2019 USD ($) Contract	Sep. 30, 2018 USD ($) Contract	Dec. 31, 2018 USD ($)
Loans And Leases Receivable Disclosure [Line Items]
Minimum loan amount for loans analyzed by credit risk			$ 500,000
Interest income recognized on a cash basis for impaired loans	$ 0	$ 15,000	0	$ 25,000
Investment in TDR	2,700,000		2,700,000		$ 1,400,000
Additional commitments related to TDR	$ 0		$ 0		0
New TDR identified during the period | Contract	2	0	2	0
TDR, payment default within twelve months | Contract	0	0	0	0
Loan period considered as payment default			30 days
Troubled Debt Restructurings
Loans And Leases Receivable Disclosure [Line Items]
Specific allowance related to loans	$ 0		$ 0		$ 0

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Fair Value - Reconciliation of Assets Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs (Level 3) (Details) - Mortgage Loan Interest Rate Lock Commitments - Significant Unobservable Inputs (Level 3) - Fair Value Measurements Recurring Basis $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Included in mortgage banking income	$ 807
Balance of recurring Level 3 assets at September 30th	$ 807

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Regulatory Capital Requirements - Schedule of Capital Amounts and Ratios (Parenthetical) (Details)	Sep. 30, 2019
Banking And Thrift [Abstract]
Minimum risk based capital ratios	2.50%

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Fair Value - Summary of Carrying Value and Fair Values of the Bank's Financial Instruments (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Financial assets:
Estimated fair value	$ 203,500,000	$ 243,808,000
Securities held to maturity, fair value	3,412,000	3,785,000
Loans held for sale	45,988,000	0
Carrying amount
Financial assets:
Cash and due from banks, interest-bearing deposits in financial institutions	154,021,000	94,681,000
Federal funds sold		10,762,000
Estimated fair value	203,500,000	243,808,000
Securities held to maturity, fair value	3,319,000	3,734,000
Loans held for sale	129,613,000	57,618,000
Restricted equity securities	13,900,000	12,038,000
Loans	1,411,768,000	1,429,794,000
Accrued interest receivable	5,780,000	5,964,000
Other assets	35,523,000	34,489,000
Financial liabilities:
Deposits	1,731,763,000	1,570,008,000
Federal Home Loan Bank advances	10,000,000	125,000,000
Other liabilities	1,552,000	2,753,000
Fair value
Financial assets:
Loans	1,405,664,000	1,442,082,000
Fair value | Level 1
Financial assets:
Cash and due from banks, interest-bearing deposits in financial institutions	154,021,000	94,681,000
Federal funds sold		10,762,000
Fair value | Level 2
Financial assets:
Estimated fair value	203,500,000	243,808,000
Securities held to maturity, fair value	3,412,000	3,785,000
Loans held for sale	131,156,000	58,596,000
Accrued interest receivable	5,780,000	5,964,000
Financial liabilities:
Federal Home Loan Bank advances	10,030,000	126,548,000
Fair value | Level 2 / Level 3
Financial assets:
Other assets	35,523,000	34,489,000
Fair value | Level 3
Financial liabilities:
Deposits	1,733,122,000	1,572,880,000
Other liabilities	$ 1,552,000	$ 2,753,000

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Stock Options and Restricted Shares - Summary of Fair Value of Options Granted Using Weighted Average Assumptions (Details)	9 Months Ended
	Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Dividend yield	1.35%
Expected term (in years)	6 years 6 months
Expected stock price volatility	29.55%
Risk-free interest rate	2.25%

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Leases - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating lease, liability	$ 12,618,000		$ 12,618,000
Operating lease, right-of-use asset	$ 11,900,000		$ 11,900,000
Operating lease, weighted average remaining lease term	10 years 9 months 18 days		10 years 9 months 18 days
Operating lease, weighted average discount rate, percent	3.53%		3.53%
Operating leases, rent expense		$ 407,000,000		$ 1,216,000,000
Sale and leaseback transaction	$ 0	$ 0	$ 0	$ 0

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Federal Home Loan Bank Advances - Summary of Contractual Maturities and Average Effective Rates of Outstanding Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Federal Home Loan Bank Advances Maturities Summary [Abstract]
2019		$ 125,000
2020	$ 10,000
Total amount	$ 10,000	$ 125,000
2019		2.48%
2020	2.20%
Total interest rates	2.20%	2.48%

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Securities - Summary of Fair Value of Available for Sale Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Securities available for sale [Abstract]
Amortized Cost	$ 200,124	$ 247,042
Gross unrealized gains	4,041	1,616
Gross unrealized (losses)	(665)	(4,850)
Estimated fair value	203,500	243,808
Securities held to maturity [Abstract]
Amortized Cost	3,319	3,734
Gross unrealized gains	93	54
Gross unrealized (losses)		(3)
Estimated fair value	3,412	3,785
U. S. government agency securities
Securities available for sale [Abstract]
Amortized Cost	9,241	11,053
Gross unrealized gains	13
Gross unrealized (losses)	(24)	(347)
Estimated fair value	9,230	10,706
State and municipal securities
Securities available for sale [Abstract]
Amortized Cost	49,369	62,142
Gross unrealized gains	2,094	765
Gross unrealized (losses)	(20)	(981)
Estimated fair value	51,443	61,926
Securities held to maturity [Abstract]
Amortized Cost	3,319	3,734
Gross unrealized gains	93	54
Gross unrealized (losses)		(3)
Estimated fair value	3,412	3,785
Mortgage-backed securities
Securities available for sale [Abstract]
Amortized Cost	128,332	146,547
Gross unrealized gains	1,828	776
Gross unrealized (losses)	(469)	(3,165)
Estimated fair value	129,691	144,158
Asset-backed securities
Securities available for sale [Abstract]
Amortized Cost	3,369	15,437
Gross unrealized gains		4
Gross unrealized (losses)	(136)	(157)
Estimated fair value	3,233	15,284
Other debt securities
Securities available for sale [Abstract]
Amortized Cost	9,813	11,863
Gross unrealized gains	106	71
Gross unrealized (losses)	(16)	(200)
Estimated fair value	$ 9,903	$ 11,734

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Summary of Basic and Diluted Earnings Per Share

The following is a summary of the basic and diluted earnings per share calculation for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands, except share data):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Basic net income per share calculation:
Numerator – Net income	$	6,466	$	3,656	$	17,001	$	10,363
Denominator – Average common shares outstanding		17,741,778		12,040,229		17,729,518		11,851,476
Basic net income per share	$	0.36	$	0.30	$	0.96	$	0.87
Diluted net income per share calculation:
Numerator – Net income	$	6,466	$	3,656	$	17,001	$	10,363
Denominator – Average common shares outstanding		17,741,778		12,040,229		17,729,518		11,851,476
Dilutive shares contingently issuable		790,701		1,073,546		940,762		1,201,282
Average diluted common shares outstanding		18,532,479		13,113,775		18,670,280		13,052,758
Diluted net income per share	$	0.35	$	0.28	$	0.91	$	0.79

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Leases

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Leases

NOTE 4 – LEASES

The Company leases certain premises and equipment under operating leases.  At September 30, 2019, the Company had lease liabilities totaling $12.6 million and right-of-use assets totaling $11.9 million related to these leases.  Lease liabilities and right-of-use assets are reflected in other liabilities and other assets, respectively.  At September 30, 2019, the weighted average remaining lease term for operating leases was 10.8 years and the weighted average discount rate used in the measurement of operating lease liabilities was 3.53%.

Lease costs were as follows (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
Operating lease cost	$	464	$	1,402
Short-term lease cost		—		—
Variable least cost		—		—
Total lease cost	$	464	$	1,402

Rent expense for the three and nine months ended September 30, 2018, prior to the adoption of ASU 2016-02 was $407,000 and $1,216,000, respectively.

There were no sale and leaseback transactions, leveraged leases, or lease transactions with related parties during the three or nine months ended September 30, 2019 or 2018.

A maturity analysis of operating lease liabilities and reconciliation of the undiscounted cash flows to the total operating lease liability is as follows (in thousands):

	September 30, 2019
Lease payments due:
2019 (excluding the nine months ended September 30, 2019)	$	382
2020		1,539
2021		1,567
2022		1,453
2023		1,402
2024 and thereafter		8,820
Total undiscounted cash flows		15,163
Discount on cash flows		(2,545	)
Total lease liability	$	12,618

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 8 – COMMITMENTS AND CONTINGENCIES

In the normal course of business, the Company has outstanding commitments and contingent liabilities, such as commitments to extend credit and standby letters of credit, which are not included in the accompanying financial statements. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instruments for commitments to extend credit and standby letters of credit is represented by the contractual or notional amount of those instruments. The Company uses the same credit policies in making such commitments as it does for instruments that are included in the balance sheet.

The following table sets forth outstanding financial instruments whose contract amounts represent credit risk as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	Contract or notional amount
	September 30, 2019		December 31, 2018
Financial instruments whose contract amounts represent    credit risk:
Unused commitments to extend credit	$	707,228	$	707,675
Standby letters of credit		10,415		12,273
Total	$	717,643	$	719,948

The Company is party to litigation and claims arising in the normal course of business. Management believes that the liabilities, if any, arising from such litigation and claims as of September 30, 2019, will not have a material impact on the financial statements of the Company.

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Earnings Per Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Share

NOTE 12 – EARNINGS PER SHARE

The following is a summary of the basic and diluted earnings per share calculation for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands, except share data):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Basic net income per share calculation:
Numerator – Net income	$	6,466	$	3,656	$	17,001	$	10,363
Denominator – Average common shares outstanding		17,741,778		12,040,229		17,729,518		11,851,476
Basic net income per share	$	0.36	$	0.30	$	0.96	$	0.87
Diluted net income per share calculation:
Numerator – Net income	$	6,466	$	3,656	$	17,001	$	10,363
Denominator – Average common shares outstanding		17,741,778		12,040,229		17,729,518		11,851,476
Dilutive shares contingently issuable		790,701		1,073,546		940,762		1,201,282
Average diluted common shares outstanding		18,532,479		13,113,775		18,670,280		13,052,758
Diluted net income per share	$	0.35	$	0.28	$	0.91	$	0.79

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Earning Per Share - Summary of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic net income per share calculation:
Numerator – Net income	$ 6,466	$ 3,656	$ 17,001	$ 10,363
Denominator – Average common shares outstanding	17,741,778	12,040,229	17,729,518	11,851,476
Basic net income per share of common stock	$ 0.36	$ 0.30	$ 0.96	$ 0.87
Diluted net income per share calculation:
Numerator – Net income	$ 6,466	$ 3,656	$ 17,001	$ 10,363
Denominator – Average common shares outstanding	17,741,778	12,040,229	17,729,518	11,851,476
Dilutive shares contingently issuable	790,701	1,073,546	940,762	1,201,282
Average diluted common shares outstanding	18,532,479	13,113,775	18,670,280	13,052,758
Diluted net income per share of common stock	$ 0.35	$ 0.28	$ 0.91	$ 0.79

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Stock Options and Restricted Shares - Summary of Activity in Stock Options (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares
Shares, Abstract
Shares Outstanding, Beginning Balance | shares	507,903
Shares Outstanding, Granted | shares	50,000	0
Shares Outstanding, Exercised | shares	(257,954)
Shares Outstanding, Ending Balance | shares	299,949	507,903
Shares, Fully Vested and Expected to Vest | shares	299,668
Shares, Exercisable at End of Period | shares	243,699
Weighted Average Exercise Price, Abstract
Weighted Average Exercise Price Outstanding, Beginning Balance | $ / shares	$ 8.66
Weighted Average Exercise Price Outstanding, Granted | $ / shares	14.84
Weighted Average Exercise Price Outstanding, Exercised | $ / shares	7.34
Weighted Average Exercise Price Outstanding, Ending Balance | $ / shares	10.83	$ 8.66
Weighted Average Exercise Price, Fully vested and expected to vest | $ / shares	10.83
Weighted Average Exercise Price, Exercisable at End of Period | $ / shares	$ 9.95
Weighted Average Remaining Contractual Term (year), Abstract
Weighted Average Remaining Contractual Term Outstanding	5 years
Weighted Average Remaining Contractual Term, Fully Vested and Expected to Vest	5 years
Weighted Average Remaining Contractual Term, Exercisable at End of Period	4 years

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Fair Value - Summary of Quantitative Information About Level 3 Fair Value Measurements on Recurring Basis (Details) - Significant Unobservable Inputs (Level 3) - Mortgage Loan Interest Rate Lock Commitments - Non-hedging derivatives $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Residential mortgage loans held for sale	$ 807
Valuation Technique(s)	Consensus pricing
Unobservable Input(s)	Origination pull-through rate
Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable inputs range	0.0069
Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable inputs range	0.0098
Weighted Average
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unobservable inputs range	0.0085

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Loans and Allowance for Loan Losses - Schedule of activity in purchased credit impaired loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Movement Schedule [Line Items]
Balance, beginning , carrying value	$ 1,537	$ 1,620
Change due to payments received and accretion	98	15
Balance, ending, carrying value	1,635	1,635
Accretable Yield For PCI Loans
Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Movement Schedule [Line Items]
Balance, beginning , carrying value	405	440
Other		10
Balance, ending, carrying value	630	630
Accretion	(145)	(190)
Reclassification from (to) nonaccretable difference	$ 370	$ 370

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Federal Home Loan Bank Advances - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Federal Home Loan Bank Advances [Line Items]
Outstanding borrowings	$ 10,000	$ 125,000
Investment securities, FHLB stock and commercial and residential real estate mortgage loans
Federal Home Loan Bank Advances [Line Items]
Federal Home Loan Bank Advances Collateralized Investment Securities Value	4,100
Mortgage loans collateralized amount	695,300
Amount of available credit	$ 212,400

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Securities - Summary of Securities with Unrealized Losses and Length of Time Continuous Loss Positions (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	$ 24,372	$ 34,154
Less than 12 months, Gross unrealized (losses)	(201)	(574)
12 months or more, Estimated fair value	40,114	117,753
12 months or more, Gross unrealized losses	(464)	(4,279)
Total, Estimated fair value	64,486	151,907
Total, Gross unrealized losses	(665)	(4,853)
U. S. government agency securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	1,990
Less than 12 months, Gross unrealized (losses)	(3)
12 months or more, Estimated fair value	1,660	10,706
12 months or more, Gross unrealized losses	(21)	(347)
Total, Estimated fair value	3,650	10,706
Total, Gross unrealized losses	(24)	(347)
State and municipal securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	2,358	13,455
Less than 12 months, Gross unrealized (losses)	(11)	(212)
12 months or more, Estimated fair value	816	17,376
12 months or more, Gross unrealized losses	(9)	(772)
Total, Estimated fair value	3,174	30,831
Total, Gross unrealized losses	(20)	(984)
Mortgage-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	16,791	7,075
Less than 12 months, Gross unrealized (losses)	(51)	(17)
12 months or more, Estimated fair value	36,151	87,232
12 months or more, Gross unrealized losses	(418)	(3,148)
Total, Estimated fair value	52,942	94,307
Total, Gross unrealized losses	(469)	(3,165)
Asset-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	3,233	8,262
Less than 12 months, Gross unrealized (losses)	(136)	(145)
12 months or more, Estimated fair value		2,439
12 months or more, Gross unrealized losses		(12)
Total, Estimated fair value	3,233	10,701
Total, Gross unrealized losses	(136)	(157)
Other debt securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value		5,362
Less than 12 months, Gross unrealized (losses)		(200)
12 months or more, Estimated fair value	1,487
12 months or more, Gross unrealized losses	(16)
Total, Estimated fair value	1,487	5,362
Total, Gross unrealized losses	$ (16)	$ (200)

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Fair Value (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are summarized below (dollars in thousands):

	Fair value measurements at September 30, 2019
				Quoted prices
				in active		Significant
				markets for		other			Significant
				identical		observable			unobservable
	Carrying			assets		inputs			inputs
	Value			(Level 1)		(Level 2)			(Level 3)
Assets:
Securities available-for-sale:
U.S. government-sponsored agencies	$	9,230		$	—	$	9,230		$	—
Obligations of states and political subdivisions		51,443			—		51,443			—
Mortgage-backed securities-residential		129,691			—		129,691			—
Asset-backed securities		3,233			—		3,233			—
Other debt securities		9,903			—		9,903			—
Loans held for sale		45,988			—		45,988			—
Derivative assets:
Non-hedging derivatives:
Interest rate swaps - customer related		909			—		909			—
Mortgage loan interest rate lock commitments		807			—		—			807
Liabilities:
Derivative liabilities:
Non-hedging derivatives:
Interest rate swaps - customer related		(909	)		—		(909	)		—
Mortgage-backed securities forward sales commitments		83			—		83			—

	Fair value measurements at December 31, 2018
				Quoted prices
				in active		Significant
				markets for		other			Significant
				identical		observable			unobservable
	Carrying			assets		inputs			inputs
	Value			(Level 1)		(Level 2)			(Level 3)
Assets:
Securities available-for-sale:
U.S. government-sponsored agencies	$	10,706		$	—	$	10,706		$	—
Obligations of states and political subdivisions		61,926			—		61,926			—
Mortgage-backed securities-residential		144,158			—		144,158			—
Asset-backed securities		15,284			—		15,284			—
Other debt securities		11,734			—		11,734			—
Derivative assets:
Non-hedging derivatives:
Interest rate swaps - customer related		494			—		494			—
Liabilities:
Derivative liabilities:
Cash flow hedges:
Interest rate swaps - cash flow hedges		(836	)		—		(836	)		—
Non-hedging derivatives:
Interest rate swaps - customer related		(494	)		—		(494	)		—

Reconciliation of Assets Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs (Level 3)

The table below presents a reconciliation of all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Mortgage Loan Interest Rate
	Lock Commitments
	2019		2018
Balance of recurring Level 3 assets at January 1st	$	—	$	—
Total gains or losses for the period:
Included in mortgage banking income		807		—
Balance of recurring Level 3 assets at September 30th	$	807	$	—

Summary of Quantitative Information About Level 3 Fair Value Measurements for Assets Measured at Fair Value on Recurring and Non-recurring Basis

The following table presents quantitative information about recurring Level 3 fair value measurements at September 30, 2019 (dollars in thousands).  There were no Level 3 fair value measurements at December 31, 2018.

					Range
	Fair		Valuation		(Weighted-
September 30, 2019	Value		Technique(s)	Unobservable Input(s)	Average)
Assets:
Non-hedging derivatives:
Mortgage loan interest rate lock commitments	$	807	Consensus pricing	Origination pull-through rate	69% - 98% (85%)

Summary of Carrying Value and Fair Values of the Bank's Financial Instruments

The carrying value and estimated fair values of the Bank’s financial instruments at September 30, 2019 and December 31, 2018 were as follows (dollars in thousands):

	September 30, 2019				December 31, 2018
	Carrying				Carrying				Fair value
	amount		Fair value		amount		Fair value		level of input
Financial assets:
Cash and due from banks, interest-bearing deposits in    financial institutions	$	154,021	$	154,021	$	94,681	$	94,681	Level 1
Federal funds sold		—		—		10,762		10,762	Level 1
Securities available-for-sale		203,500		203,500		243,808		243,808	Level 2
Securities held-to-maturity		3,319		3,412		3,734		3,785	Level 2
Loans held for sale		129,613		131,156		57,618		58,596	Level 2
Restricted equity securities		13,900	N/A			12,038	N/A		N/A
Loans		1,411,768		1,405,664		1,429,794		1,442,082	Level 3
Accrued interest receivable		5,780		5,780		5,964		5,964	Level 2
Other assets		35,523		35,523		34,489		34,489	Level 2 / Level 3
Financial liabilities:
Deposits		1,731,763		1,733,122		1,570,008		1,572,880	Level 3
Federal Home Loan Bank advances		10,000		10,030		125,000		126,548	Level 2
Other liabilities		1,552		1,552		2,753		2,753	Level 3

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Regulatory Capital Requirements

9 Months Ended

Sep. 30, 2019

Banking And Thrift [Abstract]

Regulatory Capital Requirements

NOTE 11 – REGULATORY CAPITAL REQUIREMENTS

The Company and the Bank are subject to regulatory capital requirements administered by the Federal Reserve and the Bank is also subject to the regulatory capital requirements of the Tennessee Department of Financial Institutions. Failure to meet capital requirements can initiate certain mandatory – and possibly additional discretionary – actions by regulators that could, in that event, have a material adverse effect on the institutions’ financial statements. The relevant regulations require the Company and the Bank to meet specific capital adequacy guidelines that involve quantitative measures of their assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting principles. The capital classifications of the Company and the Bank are also subject to qualitative judgments by their regulators about components, risk weightings, and other factors. Those qualitative judgments could also affect the capital status of the Company and the Bank and the amount of dividends the Company and the Bank may distribute. The final rules implementing the Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Bank on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital. Management believes as of September 30, 2019, the Company and the Bank met all regulatory capital adequacy requirements to which they are subject.

The Company’s and the Bank’s capital amounts and ratios as of September 30, 2019 and December 31, 2018 are presented in the following table (dollars in thousands).

	Actual					Minimum capital requirement (1)					Minimum to be well-capitalized (2)
	Amount		Ratio			Amount		Ratio			Amount		Ratio
At September 30, 2019:
Total capital to risk-weighted assets:
CapStar Financial Holdings, Inc.	$	232,896		13.46	%	$	138,398		8.00	%	N/A		N/A
CapStar Bank		219,513		12.69			138,351		8.00		$	172,939		10.00
Tier I capital to risk-weighted assets:
CapStar Financial Holdings, Inc.		219,889		12.71			103,799		6.00		N/A		N/A
CapStar Bank		206,506		11.94			103,763		6.00			138,351		8.00
Common equity Tier 1 capital to risk weighted    assets:
CapStar Financial Holdings, Inc.		219,889		12.71			77,849		4.50		N/A		N/A
CapStar Bank		190,006		10.99			77,822		4.50			112,410		6.50
Tier I capital to average assets:
CapStar Financial Holdings, Inc.		219,889		11.24			78,232		4.00		N/A		N/A
CapStar Bank		206,506		10.56			78,206		4.00			97,757		5.00
At December 31, 2018:
Total capital to risk-weighted assets:
CapStar Financial Holdings, Inc.	$	222,030		12.84	%	$	138,336		8.00	%	N/A		N/A
CapStar Bank		201,972		11.68			138,294		8.00		$	172,868		10.00
Tier I capital to risk-weighted assets:
CapStar Financial Holdings, Inc.		209,738		12.13			103,752		6.00		N/A		N/A
CapStar Bank		189,680		10.97			103,721		6.00			138,294		8.00
Common equity Tier 1 capital to risk weighted    assets:
CapStar Financial Holdings, Inc.		200,738		11.61			77,814		4.50		N/A		N/A
CapStar Bank		173,180		10.02			77,791		4.50			112,364		6.50
Tier I capital to average assets:
CapStar Financial Holdings, Inc.		209,738		11.06			75,867		4.00		N/A		N/A
CapStar Bank		189,680		10.01			75,828		4.00			94,785		5.00

(1) For the calendar year 2019, the Company must maintain a capital conservation buffer of Tier 1 common equity capital in excess of minimum risk-based capital ratios by at least 2.5% to avoid limits on capital distributions and certain discretionary bonus payments to executive officers and similar employees.

(2) For the Company to be well-capitalized, the Bank must be well-capitalized and the Company must not be subject to any written agreement, order, capital directive, or prompt corrective action directive issued by the Federal Reserve to meet and maintain a specific capital level for any capital measure.

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Loans and Allowance for Loan Losses

9 Months Ended

Sep. 30, 2019

Receivables [Abstract]

Loans and Allowance for Loan and Lease Losses

NOTE 3 – LOANS AND ALLLOWANCE FOR LOAN LOSSES

A summary of the loan portfolio as of September 30, 2019 and December 31, 2018 follows (dollars in thousands):

	September 30, 2019			December 31, 2018
Commercial real estate	$	576,748		$	550,446
Consumer real estate		254,736			253,562
Construction and land development		132,222			174,670
Commercial and industrial		382,816			404,600
Consumer		29,059			25,615
Other		36,187			20,901
Total		1,411,768			1,429,794
Allowance for loan losses		(12,828	)		(12,113	)
Total loans, net	$	1,398,940		$	1,417,681

The adequacy of the allowance for loan losses (ALL) is assessed at the end of each quarter. The ALL includes a specific component related to loans that are individually evaluated for impairment and a general component related to loans that are segregated into homogeneous pools and collectively evaluated for impairment.  The ALL factors applied to these pools are an estimate of probable incurred losses based on management’s evaluation of historical net losses from loans with similar characteristics, which are adjusted by management to reflect current events, trends, and conditions. The adjustments include consideration of the following:  changes in lending policies and procedures, economic conditions, nature and volume of the portfolio, experience of lending management, volume and severity of past due loans, quality of the loan review system, value of underlying collateral for collateral dependent loans, concentrations, and other external factors.

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes all commercial loans, and consumer relationships with an outstanding balance greater than $500,000, individually and assigns each loan a risk rating. This analysis is performed on a continual basis by the relationship managers and credit department personnel. On at least an annual basis an independent party performs a formal credit risk review of a sample of the loan portfolio. Among other things, this review assesses the appropriateness of the loan’s risk rating. The Company uses the following definitions for risk ratings:

Special Mention – A special mention asset possesses deficiencies or potential weaknesses deserving of management’s attention. If uncorrected, such weaknesses or deficiencies may expose the Company to an increased risk of loss in the future.

Substandard – A substandard asset is inadequately protected by the current sound net worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets classified substandard.

Doubtful – A doubtful asset has all weaknesses inherent in one classified substandard, with the added characteristic that weaknesses make collection or liquidation in full, on the basis of existing facts, conditions, and values, highly questionable and improbable. The probability of loss is extremely high, but certain important and reasonable specific pending factors which may work to the advantage and strengthening of the asset exist, therefore, its classification as an estimated loss is deferred until a more exact status may be determined. Pending factors include proposed merger, acquisition or liquidation procedures, capital injection, perfecting liens on additional collateral, and refinancing plans.

Loans not falling into the criteria above are considered to be pass-rated loans. The Company utilizes six loan grades within the pass risk rating.

The following tables present the loan balances by category as well as risk rating (dollars in thousands):

	Non-impaired Loans
September 30, 2019	Pass/Watch		Special Mention		Substandard		Total Non-impaired		TotalImpaired Loans		Total
Commercial real estate	$	563,862	$	6,631	$	3,635	$	574,128	$	2,620	$	576,748
Consumer real estate		249,952		1,656		1,806		253,414		1,322		254,736
Construction and land development		132,036		49		17		132,102		120		132,222
Commercial and industrial		364,003		12,950		4,285		381,238		1,578		382,816
Consumer		28,997		7		20		29,024		35		29,059
Other		36,187		—		—		36,187		—		36,187
Total	$	1,375,037	$	21,293	$	9,763	$	1,406,093	$	5,675	$	1,411,768
December 31, 2018
Commercial real estate	$	547,616	$	177	$	1,262	$	549,055	$	1,391	$	550,446
Consumer real estate		249,273		1,676		1,691		252,640		922		253,562
Construction and land development		174,591		52		19		174,662		8		174,670
Commercial and industrial		388,719		7,790		6,545		403,054		1,546		404,600
Consumer		25,556		1		27		25,584		31		25,615
Other		20,901		—		—		20,901		—		20,901
Total	$	1,406,656	$	9,696	$	9,544	$	1,425,896	$	3,898	$	1,429,794

The following tables detail the changes in the ALL for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Commercial real estate			Consumer real estate			Construction and land development		Commercial and industrial			Consumer			Other			Total
Three Months Ended September 30, 2019
Balance, beginning of period	$	3,922		$	1,142		$	1,733	$	5,518		$	166		$	422		$	12,903
Charged-off loans		—			—			—		(282	)		(30	)		(20	)		(332	)
Recoveries		4			2			—		356			18			2			382
Provision for loan losses		(36	)		101			209		(468	)		53			16			(125	)
Balance, end of period	$	3,890		$	1,245		$	1,942	$	5,124		$	207		$	420		$	12,828
Three Months Ended September 30, 2018
Balance, beginning of period	$	3,551		$	1,057		$	1,764	$	7,779		$	120		$	434		$	14,705
Charged-off loans		—			—			—		—			—			—			—
Recoveries		6			1			—		22			3			—			32
Provision for loan losses		(412	)		(75	)		449		767			(30	)		(218	)		481
Balance, end of period	$	3,145		$	983		$	2,213	$	8,568		$	93		$	216		$	15,218

	Commercial real estate			Consumer real estate			Construction and land development			Commercial and industrial			Consumer			Other			Total
Nine Months Ended September 30, 2019
Balance, beginning of period	$	3,309		$	1,005		$	2,431		$	5,036		$	105		$	227		$	12,113
Charged-off loans		—			—			—			(308	)		(109	)		(115	)		(532	)
Recoveries		16			18			—			371			60			21			486
Provision for loan losses		565			222			(489	)		25			151			287			761
Balance, end of period	$	3,890		$	1,245		$	1,942		$	5,124		$	207		$	420		$	12,828
Nine Months Ended September 30, 2018
Balance, beginning of period	$	3,324		$	1,063		$	1,628		$	7,209		$	91		$	406		$	13,721
Charged-off loans		—			—			—			(226	)		(25	)		—			(251	)
Recoveries		16			4			—			348			52			—			420
Provision for loan losses		(195	)		(84	)		585			1,237			(25	)		(190	)		1,328
Balance, end of period	$	3,145		$	983		$	2,213		$	8,568		$	93		$	216		$	15,218

A breakdown of the ALL and the loan portfolio by loan category at September 30, 2019 and December 31, 2018 follows (dollars in thousands):

	Commercial real estate		Consumer real estate		Construction and land development		Commercial and industrial		Consumer		Other		Total
September 30, 2019
Allowance for Loan Losses:
Collectively evaluated for impairment	$	3,890	$	1,245	$	1,942	$	5,124	$	207	$	420	$	12,828
Individually evaluated for impairment		—		—		—		—		—		—		—
Acquired with deteriorated credit quality		—		—		—		—		—		—		—
Balances, end of period	$	3,890	$	1,245	$	1,942	$	5,124	$	207	$	420	$	12,828
Loans:
Collectively evaluated for impairment	$	574,128	$	253,414	$	132,102	$	381,238	$	29,024	$	36,187	$	1,406,093
Individually evaluated for impairment		2,510		664		115		740		11		—		4,040
Acquired with deteriorated credit quality		110		658		5		838		24		—		1,635
Balances, end of period	$	576,748	$	254,736	$	132,222	$	382,816	$	29,059	$	36,187	$	1,411,768
December 31, 2018
Allowance for Loan Losses:
Collectively evaluated for impairment	$	3,309	$	1,005	$	2,431	$	5,036	$	105	$	227	$	12,113
Individually evaluated for impairment		—		—		—		—		—		—		—
Acquired with deteriorated credit quality		—		—		—		—		—		—		—
Balances, end of period	$	3,309	$	1,005	$	2,431	$	5,036	$	105	$	227	$	12,113
Loans:
Collectively evaluated for impairment	$	549,055	$	252,640	$	174,662	$	403,054	$	25,584	$	20,901	$	1,425,896
Individually evaluated for impairment		1,278		183		—		817		—		—		2,278
Acquired with deteriorated credit quality		113		739		8		729		31		—		1,620
Balances, end of period	$	550,446	$	253,562	$	174,670	$	404,600	$	25,615	$	20,901	$	1,429,794

The following table presents the allocation of the ALL for each respective loan category with the corresponding percentage of the ALL in each category to total loans, net of deferred fees as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	September 30, 2019					December 31, 2018
	Amount		Percent of total loans			Amount		Percent of total loans
Commercial real estate	$	3,890		0.28	%	$	3,309		0.23	%
Consumer real estate		1,245		0.09			1,005		0.07
Construction and land development		1,942		0.14			2,431		0.17
Commercial and industrial		5,124		0.36			5,036		0.35
Consumer		207		0.01			105		0.01
Other		420		0.03			227		0.02
Total allowance for loan losses	$	12,828		0.91	%	$	12,113		0.85	%

The following table presents the Company’s impaired loans that were evaluated for specific loss allowance as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	September 30, 2019						December 31, 2018
	Recorded investment		Unpaid principal balance		Related allowance		Recorded investment		Unpaid principal balance		Related allowance
With no related allowance recorded:
Commercial real estate	$	2,620	$	2,937	$	—	$	1,391	$	1,775	$	—
Consumer real estate		1,322		1,747		—		922		1,204		—
Construction and land development		120		149		—		8		18		—
Commercial and industrial		1,578		7,009		—		1,546		6,350		—
Consumer		35		64		—		31		56		—
Other		—		—		—		—		—		—
Subtotal		5,675		11,906		—		3,898		9,403		—
With an allowance recorded:
Commercial real estate		—		—		—		—		—		—
Consumer real estate		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—
Commercial and industrial		—		—		—		—		—		—
Consumer		—		—		—		—		—		—
Other		—		—		—		—		—		—
Subtotal		—		—		—		—		—		—
Total	$	5,675	$	11,906	$	—	$	3,898	$	9,403	$	—

The following table presents information related to the average recorded investment and interest income recognized on impaired loans for the three and nine months ended September 30, 2019 and 2018 (dollars in thousands):

	Three Months Ended				Three Months Ended				Nine Months Ended				Nine Months Ended
	September 30, 2019				September 30, 2018				September 30, 2019				September 30, 2018
	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
With no related allowance recorded:
Commercial real estate	$	2,578	$	42	$	1,159	$	15	$	2,588	$	125	$	1,189	$	25
Consumer real estate		1,175		10		92		—		1,230		43		92		3
Construction and land development		115		—		—		—		124		4		—		—
Commercial and industrial		1,257		18		—		—		1,553		63		—		—
Consumer		25		—		100		—		37		2		100		3
Other		—		—		—		—		—		—		—		—
Subtotal		5,150		70		1,351		15		5,532		237		1,381		31
With an allowance recorded:
Commercial real estate		—		—		—		—		—		—		—		—
Consumer real estate		—		—		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—		—		—
Commercial and industrial		—		—		5,419		—		—		—		5,369		118
Consumer		—		—		—		—		—		—		—		—
Other		—		—		—		—		—		—		—		—
Subtotal		—		—		5,419		—		—		—		5,369		118
Total	$	5,150	$	70	$	6,770	$	15	$	5,532	$	237	$	6,750	$	149

Interest income recognized on a cash basis for impaired loans amounted to $15,000 and $25,000 for the three and nine months ended September 30, 2018.  No interest income was recognized on a cash basis for impaired loans during the three or nine months ended September 30, 2019.

The following table presents the aging of the recorded investment in past-due loans as of September 30, 2019 and December 31, 2018 by class of loans (dollars in thousands):

	30 - 59		60 - 89		Greater Than
	Days		Days		89 Days		Total		Loans Not
	Past Due		Past Due		Past Due		Past Due		Past Due		Total
September 30, 2019
Commercial real estate	$	216	$	1,227	$	—	$	1,443	$	575,305	$	576,748
Consumer real estate		885		403		1,083		2,371		252,365		254,736
Construction and land development		—		—		—		—		132,222		132,222
Commercial and industrial		4,459		18		591		5,068		377,748		382,816
Consumer		129		6		13		148		28,911		29,059
Other		293		—		—		293		35,894		36,187
Total	$	5,982	$	1,654	$	1,687	$	9,323	$	1,402,445	$	1,411,768
December 31, 2018
Commercial real estate	$	300	$	227	$	—	$	527	$	549,919	$	550,446
Consumer real estate		69		75		775		919		252,643		253,562
Construction and land development		—		—		—		—		174,670		174,670
Commercial and industrial		54		—		—		54		404,546		404,600
Consumer		52		—		43		95		25,520		25,615
Other		—		—		—		—		20,901		20,901
Total	$	475	$	302	$	818	$	1,595	$	1,428,199	$	1,429,794

The following table presents the recorded investment in non-accrual loans, past due loans over 89 days outstanding and accruing and troubled debt restructurings (“TDR”) by class of loans as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	Non-Accrual		Past Due Over 89 Days and Accruing		Troubled Debt Restructurings
September 30, 2019
Commercial real estate	$	—	$	—	$	2,454
Consumer real estate		1,098		293		—
Construction and land development		120		—		—
Commercial and industrial		458		258		271
Consumer		25		—		—
Other		—		—		—
Total	$	1,701	$	551	$	2,725
December 31, 2018
Commercial real estate	$	—	$	—	$	1,391
Consumer real estate		1,187		214		—
Construction and land development		19		—		—
Commercial and industrial		817		—		—
Consumer		55		—		—
Other		—		—		—
Total	$	2,078	$	214	$	1,391

As of September 30, 2019 and December 31, 2018, all loans classified as nonperforming were deemed to be impaired.

As of September 30, 2019 and December 31, 2018, the Company had a recorded investment in TDR of $2.7 million and $1.4 million, respectively. The Company had no specific allowance for those loans at September 30, 2019 or December 31, 2018 and there were no commitments to lend additional amounts.  Loans accounted for as TDR include modifications from original terms such as those due to bankruptcy proceedings, certain modifications of amortization periods or extended suspension of principal payments due to customer financial difficulties.  In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification.  This evaluation is performed under the Bank’s loan policy.  Loans accounted for as TDR are individually evaluated for impairment.

The following table presents loans by class modified as TDR that occurred during the three and nine months ended September 30, 2019 (dollars in thousands).  There were no new TDR identified during the three or nine months ended September 30, 2018.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	Number of contracts		Pre modification outstanding recorded investment		Post modification outstanding recorded investment, net of related allowance		Number of contracts		Pre modification outstanding recorded investment		Post modification outstanding recorded investment, net of related allowance
2019
Commercial real estate		1	$	1,228	$	1,228		1	$	1,228	$	1,228
Consumer real estate		—		—		—		—		—		—
Construction and land development		—		—		—		—		—		—
Commercial and industrial		1		271		271		1		271		271
Consumer		—		—		—		—		—		—
Other		—		—		—		—		—		—
Total		2	$	1,499	$	1,499		2	$	1,499	$	1,499

There were no TDR for which there was a payment default within twelve months following the modification during the three or nine months ended September 30, 2019 or 2018.

A loan is considered to be in payment default once it is 30 days contractually past due under the modified terms.

Acquired Loans

The following table presents changes in the carrying value of purchased credit impaired (“PCI”) loans (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
Balance at beginning of period	$	1,537	$	1,620
Change due to payments received and accretion		98		15
Change due to loan charge-offs		—		—
Other		—		—
Balance at end of period	$	1,635	$	1,635

The following table presents changes in the accretable yield for PCI loans (in thousands):

	Three Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2019
Balance at beginning of period	$	405		$	440
Accretion		(145	)		(190	)
Reclassification from (to) nonaccretable difference		370			370
Other, net		—			10
Balance at end of period	$	630		$	630

PCI loans had no impact on the ALL for the three or nine months ended September 30, 2019 or 2018.

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Income Taxes

9 Months Ended

Sep. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 7 – INCOME TAXES

The Company’s effective tax rate for the three and nine months ended September 30, 2019 was 24.3% and 23.5% compared to 13.2% and 14.1% for the three and nine months ended September 30, 2018.  In March 2016, the FASB issued guidance to simplify several aspects of the accounting for share-based payment award transactions, including income tax consequences. In addition to other changes, the guidance changes the accounting for excess tax benefits and tax deficiencies from generally being recognized in additional paid-in capital to recognition as income tax expense or benefit in the period they occur. The Company adopted the new guidance in the first quarter of 2017. As a result, the Company’s income tax expense was decreased by $23,000 and $54,000 for the three and nine months ended September 30, 2019, respectively, and decreased by $422,000 and $1,062,000 for the three and nine months ended September 30, 2018, respectively.

The effective tax rate compared favorably to the statutory federal rate of 21% and Tennessee excise tax rate of 6.5% primarily due to investments in qualified municipal securities, company owned life insurance, state tax credits, net of the effect of certain non-deductible expenses and the recognition of excess tax benefits related to stock compensation.

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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Summary of Difference Between the Fair Value and Aggregate Unpaid Principal Balance

The following table summarizes the difference between the fair value and the aggregate unpaid principal balance for residential real estate loans held for sale as of September 30, 2019 (dollars in thousands):

	Fair Value		Aggregate Unpaid Principal Balance		Difference
September 30, 2019
Residential mortgage loans held for sale	$	45,988	$	45,296	$	692

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Federal Home Loan Bank Advances (Tables)

9 Months Ended

Sep. 30, 2019

Federal Home Loan Banks [Abstract]

Summary of Contractual Maturities and Average Effective Rates of Outstanding Advances

The following is a summary of the contractual maturities and average effective rates of outstanding advances (dollars in thousands):

	September 30, 2019					December 31, 2018
Year	Amount		Interest Rates			Amount		Interest Rates
2019	$	—		—		$	125,000		2.48	%
2020		10,000		2.20	%		—		—
2021		—		—			—		—
2022		—		—			—		—
2023		—		—			—		—
Thereafter		—		—			—		—
Total	$	10,000		2.20	%	$	125,000		2.48	%

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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,466	$ 3,656	$ 17,001	$ 10,363
Unrealized gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	1,112	(1,193)	6,502	(6,120)
Reclassification adjustment for (gains) losses included in net income		1	108	(2)
Tax effect	(291)	312	(1,729)	1,600
Net of tax	821	(880)	4,881	(4,522)
Unrealized losses on securities transferred to held-to-maturity:
Reclassification adjustment for losses included in net income				14
Tax effect				(4)
Net of tax				10
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) arising during the period		129	(702)	697
Reclassification adjustment for losses included in net income	265	224	627	698
Tax effect		(50)	(218)	(237)
Net of tax	265	303	(293)	1,158
Other comprehensive income (loss)	1,086	(577)	4,588	(3,354)
Comprehensive income	$ 7,552	$ 3,079	$ 21,589	$ 7,009

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Stock Options and Restricted Shares - Summary of Company Recognized Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based compensation expense before income taxes	$ 351	$ 310	$ 1,035	$ 940
Less: deferred tax benefit	(92)	(81)	(271)	(246)
Reduction of net income	$ 259	$ 229	$ 764	$ 694

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 31, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	CSTR
Entity Registrant Name	CAPSTAR FINANCIAL HOLDINGS, INC.
Entity Central Index Key	0001676479
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		18,357,921
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-37886
Entity Tax Identification Number	81-1527911
Entity Address, Address Line One	1201 Demonbreun Street
Entity Address, Address Line Two	Suite 700
Entity Address, City or Town	Nashville
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37203
City Area Code	615
Local Phone Number	732-6400
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	TN
Title of 12(b) Security	Common Stock, $1.00 par value per share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes

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Securities

9 Months Ended

Sep. 30, 2019

Investments Debt And Equity Securities [Abstract]

Securities

NOTE 2 – SECURITIES

The amortized cost and fair value of securities available-for-sale and held-to-maturity at September 30, 2019 and December 31, 2018 are summarized as follows (dollars in thousands):

	September 30, 2019									December 31, 2018
	Amortized Cost		Gross unrealized gains		Gross unrealized (losses)			Estimated fair value		Amortized Cost		Gross unrealized gains		Gross unrealized (losses)			Estimated fair value
Securities available-for-sale:
U. S. government agency securities	$	9,241	$	13	$	(24	)	$	9,230	$	11,053	$	—	$	(347	)	$	10,706
State and municipal securities		49,369		2,094		(20	)		51,443		62,142		765		(981	)		61,926
Mortgage-backed securities		128,332		1,828		(469	)		129,691		146,547		776		(3,165	)		144,158
Asset-backed securities		3,369		—		(136	)		3,233		15,437		4		(157	)		15,284
Other debt securities		9,813		106		(16	)		9,903		11,863		71		(200	)		11,734
Total	$	200,124	$	4,041	$	(665	)	$	203,500	$	247,042	$	1,616	$	(4,850	)	$	243,808
Securities held-to-maturity:
State and municipal securities	$	3,319	$	93	$	—		$	3,412	$	3,734	$	54	$	(3	)	$	3,785
Total	$	3,319	$	93	$	—		$	3,412	$	3,734	$	54	$	(3	)	$	3,785

Security fair values are established by an independent pricing service as of the dates indicated. The difference between amortized cost and fair value reflects current interest rates and represents the potential gain (loss) had the portfolio been liquidated on those dates. Security gains (losses) are realized only in the event of dispositions prior to maturity or other-than-temporary impairment. Securities with unrealized losses as of September 30, 2019 and December 31, 2018, and the length of time they were in continuous loss positions as of such dates are as follows (dollars in thousands):

	Less than 12 months					12 months or more					Total
September 30, 2019	Estimated fair value		Gross unrealized losses			Estimated fair value		Gross unrealized losses			Estimated fair value		Gross unrealized losses
U. S. government agency securities	$	1,990	$	(3	)	$	1,660	$	(21	)	$	3,650	$	(24	)
State and municipal securities		2,358		(11	)		816		(9	)		3,174		(20	)
Mortgage-backed securities		16,791		(51	)		36,151		(418	)		52,942		(469	)
Asset-backed securities		3,233		(136	)		—		—			3,233		(136	)
Other debt securities		—		—			1,487		(16	)		1,487		(16	)
Total temporarily impaired securities	$	24,372	$	(201	)	$	40,114	$	(464	)	$	64,486	$	(665	)
December 31, 2018
U. S. government agency securities	$	—	$	—		$	10,706	$	(347	)	$	10,706	$	(347	)
State and municipal securities		13,455		(212	)		17,376		(772	)		30,831		(984	)
Mortgage-backed securities		7,075		(17	)		87,232		(3,148	)		94,307		(3,165	)
Asset-backed securities		8,262		(145	)		2,439		(12	)		10,701		(157	)
Other debt securities		5,362		(200	)		—		—			5,362		(200	)
Total temporarily impaired securities	$	34,154	$	(574	)	$	117,753	$	(4,279	)	$	151,907	$	(4,853	)

As noted in the table above, as of September 30, 2019, the Company had unrealized losses of $0.7 million in its investment securities portfolio. The unrealized losses associated with these investment securities are driven by changes in interest rates and are recorded as a component of equity. These investment securities will continue to be monitored as a part of our ongoing impairment analysis. Management evaluates the financial performance of the issuers on a quarterly basis to determine if it is probable that the issuers can make all contractual principal and interest payments. If a shortfall in future cash flows is identified, a credit loss will be deemed to have occurred and will be recognized as a charge to earnings and a new cost basis for the security will be established. At September 30, 2019 and December 31, 2018, the Company had 45 and 127, respectively of securities in an unrealized loss position.

Because the Company currently does not intend to sell any investment securities that have an unrealized loss at September 30, 2019, and it is not more-likely-than-not that we will be required to sell these investment securities before recovery of their amortized cost bases, which may be at maturity, we do not consider these securities to be other-than-temporarily impaired at September 30, 2019.

Securities with a market value of $80.6 million at September 30, 2019 were pledged to collateralize public deposits, derivative positions and Federal Home Loan Bank advances.

Results from sales of debt and equity securities were as follows (dollars in thousands):

	Nine Months Ended			Nine Months Ended
	September 30, 2019			September 30, 2018
Proceeds	$	54,133		$	5,778
Gross gains		370			107
Gross losses		(478	)		(105	)

The amortized cost and fair value of securities at September 30, 2019, by contractual maturity, are shown below (dollars in thousands). Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.

	Available-for-sale				Held-to-maturity
	Amortized cost		Estimated fair value		Amortized cost		Estimated fair value
Due in less than one year	$	7,881	$	7,963	$	881	$	884
Due one to five years		28,994		29,698		2,438		2,528
Due five to ten years		31,353		32,721		—		—
Due beyond ten years		195		194		—		—
Mortgage-backed securities		128,332		129,691		—		—
Asset-backed securities		3,369		3,233		—		—
Total	$	200,124	$	203,500	$	3,319	$	3,412

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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Taxes [Line Items]
Effective tax rate	24.30%	13.20%	23.50%	14.10%
Income tax decrease	$ 23,000	$ 422,000	$ 54,000	$ 1,062,000
Federal statutory income tax rate			21.00%
Tennessee | State and Local Jurisdiction
Income Taxes [Line Items]
Excise tax rate			6.50%

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Derivatives - Summary of Customer Related Interest Rate Swaps (Details) - Interest Rate Swaps - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Interest rate swap, Notional amount	$ 54,974,000	$ 58,252,000
Pay fixed/receive variable swaps
Derivative [Line Items]
Interest rate swap, Notional amount	27,487,000	29,126,000
Interest rate swap, Estimated fair value	(905,000)	24,000
Pay variable/receive fixed swaps
Derivative [Line Items]
Interest rate swap, Notional amount	27,487,000	29,126,000
Interest rate swap, Estimated fair value	$ 905,000	$ (24,000)

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Loans and Allowance for Loan Losses - Summary of Impaired Loans Evaluated for Specific Loss Allowance (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment	$ 5,675	$ 3,898
Impaired loans with no related allowance recorded, Unpaid principal balance	11,906	9,403
Recorded investment	5,675	3,898
Unpaid principal balance	11,906	9,403
Commercial real estate
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment	2,620	1,391
Impaired loans with no related allowance recorded, Unpaid principal balance	2,937	1,775
Consumer real estate
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment	1,322	922
Impaired loans with no related allowance recorded, Unpaid principal balance	1,747	1,204
Construction and land development
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment	120	8
Impaired loans with no related allowance recorded, Unpaid principal balance	149	18
Commercial and industrial
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment	1,578	1,546
Impaired loans with no related allowance recorded, Unpaid principal balance	7,009	6,350
Consumer
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment	35	31
Impaired loans with no related allowance recorded, Unpaid principal balance	$ 64	$ 56

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Loans and Allowance for Loan Losses - Summary of Loan Balances by Category as well as Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 1,411,768	$ 1,429,794
Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	5,675	3,898
Performing Financial Instruments
Financing Receivable Recorded Investment [Line Items]
Total loans	1,406,093	1,425,896
Performing Financial Instruments | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	1,375,037	1,406,656
Performing Financial Instruments | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	21,293	9,696
Performing Financial Instruments | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	9,763	9,544
Commercial real estate
Financing Receivable Recorded Investment [Line Items]
Total loans	576,748	550,446
Commercial real estate | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	2,620	1,391
Commercial real estate | Performing Financial Instruments
Financing Receivable Recorded Investment [Line Items]
Total loans	574,128	549,055
Commercial real estate | Performing Financial Instruments | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	563,862	547,616
Commercial real estate | Performing Financial Instruments | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	6,631	177
Commercial real estate | Performing Financial Instruments | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	3,635	1,262
Consumer real estate
Financing Receivable Recorded Investment [Line Items]
Total loans	254,736	253,562
Consumer real estate | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	1,322	922
Consumer real estate | Performing Financial Instruments
Financing Receivable Recorded Investment [Line Items]
Total loans	253,414	252,640
Consumer real estate | Performing Financial Instruments | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	249,952	249,273
Consumer real estate | Performing Financial Instruments | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	1,656	1,676
Consumer real estate | Performing Financial Instruments | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	1,806	1,691
Construction and land development
Financing Receivable Recorded Investment [Line Items]
Total loans	132,222	174,670
Construction and land development | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	120	8
Construction and land development | Performing Financial Instruments
Financing Receivable Recorded Investment [Line Items]
Total loans	132,102	174,662
Construction and land development | Performing Financial Instruments | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	132,036	174,591
Construction and land development | Performing Financial Instruments | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	49	52
Construction and land development | Performing Financial Instruments | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	17	19
Commercial and industrial
Financing Receivable Recorded Investment [Line Items]
Total loans	382,816	404,600
Commercial and industrial | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	1,578	1,546
Commercial and industrial | Performing Financial Instruments
Financing Receivable Recorded Investment [Line Items]
Total loans	381,238	403,054
Commercial and industrial | Performing Financial Instruments | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	364,003	388,719
Commercial and industrial | Performing Financial Instruments | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	12,950	7,790
Commercial and industrial | Performing Financial Instruments | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	4,285	6,545
Consumer
Financing Receivable Recorded Investment [Line Items]
Total loans	29,059	25,615
Consumer | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	35	31
Consumer | Performing Financial Instruments
Financing Receivable Recorded Investment [Line Items]
Total loans	29,024	25,584
Consumer | Performing Financial Instruments | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	28,997	25,556
Consumer | Performing Financial Instruments | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	7	1
Consumer | Performing Financial Instruments | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	20	27
Other
Financing Receivable Recorded Investment [Line Items]
Total loans	36,187	20,901
Other | Performing Financial Instruments
Financing Receivable Recorded Investment [Line Items]
Total loans	36,187	20,901
Other | Performing Financial Instruments | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 36,187	$ 20,901