CapStar Financial (CSTR) 10-Q 8 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 08, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Trading Symbol	CSTR
Entity Registrant Name	CAPSTAR FINANCIAL HOLDINGS, INC.
Entity Central Index Key	1,676,479
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		11,186,433

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 10,330,683	$ 8,265,287
Interest-bearing deposits in financial institutions	62,925,052	85,189,846
Federal funds sold	195,000	6,729,708
Total cash and cash equivalents	73,450,735	100,184,841
Securities available for sale, at fair value	167,213,109	173,382,957
Securities held to maturity, fair value of $50,664,931, and $46,458,841 at September 30, 2016 and December 31, 2015, respectively	46,227,968	43,093,951
Loans held for sale	61,251,662	35,729,353
Loans and leases	924,030,515	808,396,064
Less allowance for loan and lease losses	(11,510,464)	(10,131,729)
Loans, net	912,520,051	798,264,335
Premises and equipment, net	4,722,726	4,896,447
Restricted equity securities	5,525,500	5,413,500
Accrued interest receivable	3,813,485	3,029,550
Goodwill	6,218,867	6,218,867
Core deposit intangible	84,445	125,045
Other real estate owned		216,254
Deferred tax assets	12,376,347	12,849,508
Bank owned life insurance	21,750,220	21,299,068
Other assets	2,902,210	2,096,603
Total assets	1,318,057,325	1,206,800,279
Deposits:
Non-interest-bearing	191,469,462	190,580,468
Interest-bearing	284,500,917	189,982,675
Savings and money market accounts	451,415,904	437,214,054
Time	208,673,509	220,683,113
Total deposits	1,136,059,792	1,038,460,310
Securities sold under repurchase agreements		3,755,000
Federal Home Loan Bank advances	30,000,000	45,000,000
Accrued interest payable	201,981	176,540
Other liabilities	13,369,051	10,822,322
Total liabilities	1,179,630,824	1,098,214,172
Shareholders’ equity:
Series A convertible preferred stock, $1 par value; 5,000,000 shares authorized; 878,049 and 1,609,756 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	878,049	1,609,756
Common stock, voting, $1 par value; 20,000,000 shares authorized; 11,191,021 and 8,577,051 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	11,191,021	8,577,051
Additional paid-in capital	116,143,008	95,277,968
Retained earnings	14,205,030	8,035,712
Accumulated other comprehensive loss, net of income tax	(3,990,607)	(4,914,380)
Total shareholders’ equity	138,426,501	108,586,107
Total liabilities and shareholders’ equity	$ 1,318,057,325	$ 1,206,800,279

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Securities held to maturity, fair value	$ 50,664,931	$ 46,458,841
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	878,049	1,609,756
Preferred stock, shares outstanding	878,049	1,609,756
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	11,191,021	8,577,051
Common stock, shares outstanding	11,191,021	8,577,051

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income:
Loans, including fees	$ 10,658,758	$ 9,428,826	$ 29,531,404	$ 25,834,421
Securities:
Taxable	787,076	993,485	2,596,059	3,277,535
Tax-exempt	291,110	277,365	841,264	802,029
Federal funds sold	3,597	3,089	12,107	13,138
Restricted equity securities	70,609	67,528	209,654	200,174
Interest-bearing deposits in financial institutions	63,455	32,354	197,033	105,063
Total interest income	11,874,605	10,802,647	33,387,521	30,232,360
Interest expense:
Interest-bearing deposits	404,040	184,162	1,095,984	533,747
Savings and money market accounts	689,382	650,735	2,140,405	2,039,751
Time deposits	545,733	492,178	1,566,373	1,564,751
Federal funds purchased	13,097	7,510	20,917	14,604
Securities sold under agreements to repurchase		3,715	1,311	12,731
Federal Home Loan Bank advances	96,838	47,333	279,586	131,000
Total interest expense	1,749,090	1,385,633	5,104,576	4,296,584
Net interest income	10,125,515	9,417,014	28,282,945	25,935,776
Provision for loan and lease losses	1,638,669	580,000	2,758,749	1,300,675
Net interest income after provision for loan and lease losses	8,486,846	8,837,014	25,524,196	24,635,101
Noninterest income:
Service charges on deposit accounts	276,751	235,035	805,322	667,415
Loan commitment fees	328,785	306,231	901,524	631,130
Net gain (loss) on sale of securities	(3,964)	38,673	120,873	95,584
Mortgage banking income	2,339,310	1,748,883	5,341,605	4,699,177
Other noninterest income	250,581	305,837	961,103	872,047
Total noninterest income	3,191,463	2,634,659	8,130,427	6,965,353
Noninterest expense:
Salaries and employee benefits	5,119,356	5,205,896	15,275,494	14,628,293
Data processing and software	627,335	562,544	1,830,553	1,776,955
Professional fees	390,862	374,496	1,147,733	1,113,776
Occupancy	351,691	381,522	1,132,664	1,172,163
Equipment	458,053	442,899	1,300,793	1,201,084
Regulatory fees	250,424	227,053	742,308	688,965
Other operating	1,329,084	1,409,489	3,057,795	3,072,518
Total noninterest expense	8,526,805	8,603,899	24,487,340	23,653,754
Income before income taxes	3,151,504	2,867,774	9,167,283	7,946,700
Income tax expense	1,042,282	831,307	2,997,965	2,480,231
Net income	$ 2,109,222	$ 2,036,467	$ 6,169,318	$ 5,466,469
Per share information:
Basic net income per common share	$ 0.24	$ 0.24	$ 0.71	$ 0.64
Diluted net income per common share	$ 0.20	$ 0.20	$ 0.58	$ 0.53
Weighted average shares outstanding:
Basic	8,792,665	8,554,802	8,701,596	8,526,840
Diluted	10,799,536	10,407,721	10,682,976	10,364,278

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,109,222	$ 2,036,467	$ 6,169,318	$ 5,466,469
Unrealized gains (losses) on securities available for sale:
Unrealized holding gains (losses) arising during the period	(744,017)	1,150,343	2,829,245	1,199,555
Reclassification adjustment for (gains) losses included in net income	3,964	(38,673)	(120,873)	(95,584)
Tax effect	283,366	(425,658)	(1,037,036)	(422,710)
Net of tax	(456,687)	686,012	1,671,336	681,261
Unrealized losses on securities transferred to held to maturity:
Reclassification adjustment for losses included in net income	41,720	41,720	125,159	125,159
Tax effect	(15,975)	(15,975)	(47,923)	(47,923)
Net of tax	25,745	25,745	77,236	77,236
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) arising during the period	86,957	(2,430,325)	(1,759,814)	(1,912,757)
Reclassification adjustment for losses included in net income	87,727		261,182
Tax effect	(33,296)	1,406,356	673,833	437,179
Net of tax	141,388	(1,023,969)	(824,799)	(1,475,578)
Other comprehensive income (loss)	(289,554)	(312,212)	923,773	(717,081)
Comprehensive income	$ 1,819,668	$ 1,724,255	$ 7,093,091	$ 4,749,388

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2014	$ 102,651,373	$ 1,609,756	$ 8,471,516	$ 94,927,215	$ 476,275	$ (2,833,389)
Beginning balance, shares at Dec. 31, 2014			8,471,516
Issuance of restricted common stock, net of forfeitures			$ 92,535	(92,535)
Issuance of restricted common stock, net of forfeitures, shares			92,535
Stock-based compensation expense	288,850			288,850
Excess tax benefit from stock compensation	5,777			5,777
Exercise of employee common stock options	10,000		$ 1,000	9,000
Exercise of employee common stock options, shares			1,000
Net income	5,466,469				5,466,469
Other comprehensive income (loss)	(717,081)					(717,081)
Ending balance at Sep. 30, 2015	107,705,388	1,609,756	$ 8,565,051	95,138,307	5,942,744	(3,550,470)
Ending balance, shares at Sep. 30, 2015			8,565,051
Beginning balance at Dec. 31, 2014	102,651,373	1,609,756	$ 8,471,516	94,927,215	476,275	(2,833,389)
Beginning balance, shares at Dec. 31, 2014			8,471,516
Other comprehensive income (loss)	(2,080,000)
Ending balance at Dec. 31, 2015	108,586,107	1,609,756	$ 8,577,051	95,277,968	8,035,712	(4,914,380)
Ending balance, shares at Dec. 31, 2015			8,577,051
Issuance of restricted common stock, net of forfeitures and withholdings to satisfy employee tax obligations	(16,338)		$ 106,548	(122,886)
Issuance of restricted common stock, net of forfeitures and withholdings to satisfy employee tax obligations, shares			106,548
Stock-based compensation expense	643,276			643,276
Excess tax benefit from stock compensation	28,576			28,576
Issuance of common stock	21,927,623		$ 1,688,049	20,239,574
Issuance of common stock, shares			1,688,049
Conversion of preferred stock		(731,707)	$ 731,707
Conversion of preferred stock, shares			731,707
Exercise of common stock warrants	164,166		$ 87,666	76,500
Exercise of common stock warrants, shares			87,666
Net income	6,169,318				6,169,318
Other comprehensive income (loss)	923,773					923,773
Ending balance at Sep. 30, 2016	$ 138,426,501	$ 878,049	$ 11,191,021	$ 116,143,008	$ 14,205,030	$ (3,990,607)
Ending balance, shares at Sep. 30, 2016			11,191,021

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 2,109,222	$ 2,036,467	$ 6,169,318	$ 5,466,469
Adjustments to reconcile net income to net cash used in operating activities:
Provision for loan and lease losses	1,638,669	580,000	2,758,749	1,300,675	$ 1,651,000
Accretion of discounts on acquired loans and deferred fees			(1,233,940)	(1,755,968)
Depreciation and amortization			323,955	442,834
Net amortization of premiums on investment securities			1,105,485	1,204,910
Securities (gains) losses, net	3,964	(38,673)	(120,873)	(95,584)
Mortgage banking income	(2,339,310)	(1,748,883)	(5,341,605)	(4,699,177)
Net loss on disposal of premises and equipment				(28,106)
Net (gain) loss on sale of other real estate owned			(157,184)	5,100
Stock-based compensation			643,276	288,850
Excess tax benefit from stock compensation			(28,576)	(5,777)
Deferred income tax expense			62,035	1,232,969
Origination of loans held for sale			(393,378,252)	(328,066,517)
Proceeds from loans held for sale			370,374,921	319,381,550
Net increase in accrued interest receivable and other assets			(2,022,143)	(1,501,183)
Net increase in accrued interest payable and other liabilities			1,076,673	1,333,490
Net cash used in operating activities			(19,768,161)	(5,495,465)
Activities in securities available for sale:
Purchases			(55,862,232)	(43,493,770)
Sales			46,700,138	88,158,011
Maturities, prepayments and calls			17,113,459	21,781,269
Activities in securities held to maturity:
Purchases			(4,300,000)
Maturities, prepayments and calls			1,233,385	581,577
Purchase of restricted equity securities			(112,000)	(144,700)
Net increase in loans			(112,957,898)	(70,486,544)
Purchase of premises and equipment			(102,744)	(8,804)
Proceeds from the sale of premises and equipment				233,387
Proceeds from sale of other real estate			373,438	234,246
Net cash used in investing activities			(107,914,454)	(3,145,328)
Cash flows from financing activities:
Net increase (decrease) in deposits			97,599,482	(6,045,546)
Proceeds from Federal Home Loan Bank advances			15,000,000	15,000,000
Payments on Federal Home Loan Bank advances			(30,000,000)
Issuance of common stock			(21,927,623)
Exercise of common stock options and warrants, net of repurchase of restricted shares			147,828	10,000
Excess tax benefit from stock compensation			28,576	5,777
Termination of interest rate swap agreement				(771,000)
Net decrease in repurchase agreements			(3,755,000)	(9,359,000)
Net cash provided by (used in) financing activities			100,948,509	(1,159,769)
Net decrease in cash and cash equivalents			(26,734,106)	(9,800,562)
Cash and cash equivalents at beginning of period			100,184,841	73,934,337	73,934,337
Cash and cash equivalents at end of period	$ 73,450,735	$ 64,133,775	73,450,735	64,133,775	$ 100,184,841
Supplemental disclosures of cash paid:
Interest paid			5,079,136	4,339,370
Income taxes			2,544,983	2,671,908
Supplemental disclosures of noncash transactions:
Loans charged off to the allowance for loan and lease losses			1,451,507	$ 3,205,671
Loans transferred from held for sale to held for investment			$ 2,822,627

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The unaudited consolidated financial statements as of and for the period ended September 30, 2016 include CapStar Financial Holdings, Inc. and it’s wholly owned subsidiary, CapStar Bank (the “Bank”, together referred to as the “Company”). Significant intercompany transactions and accounts are eliminated in consolidation. The financial statements as of December 31, 2015 and for the periods ended September 30, 2015 only include CapStar Bank because the share exchange pursuant to which CapStar Financial Holdings, Inc., a bank holding company and a Tennessee corporation, became the parent company of CapStar Bank had not yet taken place. On February 5, 2016, CapStar Financial Holdings, Inc. acquired all of the Bank’s issued and outstanding shares of common stock, preferred stock, common stock options and warrants, and the Bank became the wholly owned subsidiary of CapStar Financial Holdings, Inc. 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 CapStar Bank’s audited financial statements included in the Prospectus. Initial Public Offering On September 21, 2016, the Securities and Exchange Commission (SEC) declared effective our registration statement on Form S-1 registering the shares of our common stock. On September 27, 2016, we completed the initial public offering of 2,972,750 shares of our common stock. Of the 2,972,750 shares sold, 1,688,049 shares were sold by us and 1,284,701 shares were sold by certain selling shareholders. Of the 1,284,701 shares sold by certain selling shareholders, 731,707 were from preferred shares converted to common shares and 79,166 from the cashless exercise of 250,000 common share warrants. We received net proceeds of approximately $21.9 million from the offering, after deducting the underwriting discounts and commissions and estimated offering expenses. We did not receive any proceeds from the sale of shares by the selling shareholders. 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 and lease losses, determination of impairment of intangible assets, including goodwill, the valuation of our investment portfolio, deferred tax assets and estimated liabilities. There have been no significant changes to the Company’s significant accounting policies as disclosed in CapStar Bank’s audited financial statements for the year ended December 31, 2015 included in the Prospectus. Subsequent Events 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, 2016 through the date of the issued financial statements.

Securities

Securities	9 Months Ended
	Sep. 30, 2016
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, 2016 and December 31, 2015 are summarized as follows (in thousands): September 30, 2016 December 31, 2015 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 $ 7,529 $ 79 $ (1 ) $ 7,607 $ 19,562 $ 16 $ (36 ) $ 19,542 State and municipal securities 20,072 499 (72 ) 20,499 13,776 99 (7 ) 13,868 Mortgage-backed securities 117,542 1,073 (188 ) 118,427 119,828 13 (1,461 ) 118,380 Asset-backed securities 21,959 — (1,279 ) 20,680 22,814 — (1,221 ) 21,593 Total $ 167,102 $ 1,651 $ (1,540 ) $ 167,213 $ 175,980 $ 128 $ (2,725 ) $ 173,383 Securities held to maturity: State and municipal securities $ 36,819 $ 4,144 $ — $ 40,963 $ 37,005 $ 3,245 $ — $ 40,250 Mortgage-backed securities 5,109 258 — 5,367 6,089 120 — 6,209 Other debt securities 4,300 35 — 4,335 — — — — Total $ 46,228 $ 4,437 $ — $ 50,665 $ 43,094 $ 3,365 $ — $ 46,459 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, 2016 and December 31, 2015, and the length of time they were in continuous loss positions as of such dates are as follows (in thousands): Less than 12 months 12 months or more Total September 30, 2016 Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses U. S. government agency securities $ 2,014 $ (1 ) $ — $ — $ 2,014 $ (1 ) State and municipal securities 5,980 (72 ) — — 5,980 (72 ) Mortgage-backed securities 23,657 (123 ) 4,622 (65 ) 28,279 (188 ) Asset-backed securities — — 20,680 (1,279 ) 20,680 (1,279 ) Total available for sale $ 31,651 $ (196 ) $ 25,302 $ (1,344 ) $ 56,953 $ (1,540 ) December 31, 2015 U. S. government agency securities $ 13,100 $ (36 ) $ — $ — $ 13,100 $ (36 ) State and municipal securities 3,099 (7 ) — — 3,099 (7 ) Mortgage-backed securities 97,154 (1,068 ) 16,260 (393 ) 113,414 (1,461 ) Asset-backed securities — — 21,593 (1,221 ) 21,593 (1,221 ) Total available for sale $ 113,353 $ (1,111 ) $ 37,853 $ (1,614 ) $ 151,206 $ (2,725 ) As noted in the table above, as of September 30, 2016, the Company had unrealized losses of $1.5 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. Because the Company currently does not intend to sell any investment securities that have an unrealized loss at September 30, 2016, 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, 2016. Securities with a carrying value of $134.2 million at September 30, 2016 were pledged to collateralize public deposits, derivative positions and Federal Home Loan Bank advances. The amortized cost and fair value of securities at September 30, 2016, by contractual maturity, are shown below (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 one to five years $ 9,717 $ 9,816 $ 23,341 $ 25,425 Due five to ten years 17,360 17,773 16,657 18,582 Due beyond ten years 524 517 1,121 1,291 Mortgage-backed securities 117,542 118,427 5,109 5,367 Asset-backed securities 21,959 20,680 — — $ 167,102 $ 167,213 $ 46,228 $ 50,665

Loans and Allowance for Loan an

Loans and Allowance for Loan and Lease Losses	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans and Allowance for Loan and Lease Losses	NOTE 3 – LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES A summary of the loan portfolio as of September 30, 2016 and December 31, 2015 follows (in thousands): September 30, 2016 December 31, 2015 Commercial real estate $ 272,546 $ 251,197 Consumer real estate 96,919 93,785 Construction and land development 91,366 52,522 Commercial and industrial 389,718 353,442 Consumer 7,046 8,668 Other 67,806 50,197 Total 925,401 809,811 Less net unearned income (1,370 ) (1,415 ) 924,031 808,396 Allowance for loan and lease losses (11,510 ) (10,132 ) $ 912,521 $ 798,264 The adequacy of the allowance for loan and lease losses (ALLL) is assessed at the end of each quarter. The ALLL includes a specific component related to loans that are individually evaluated for impairment and a general component related to loans that are segregated into homogenous pools and collectively evaluated for impairment. The ALLL 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 following tables present the loan balances by category as well as risk rating (in thousands): Performing Loans September 30, 2016 Pass/Watch Special Mention Substandard Total Performing Total Loans Total Commercial real estate $ 271,219 $ — $ — $ 271,219 $ 1,327 $ 272,546 Consumer real estate 96,624 — 295 96,919 — 96,919 Construction and land development 91,366 — — 91,366 — 91,366 Commercial and industrial 361,863 8,691 16,368 386,922 2,796 389,718 Consumer 7,029 — 17 7,046 — 7,046 Other 67,806 — — 67,806 — 67,806 Total $ 895,907 $ 8,691 $ 16,680 $ 921,278 $ 4,123 $ 925,401 December 31, 2015 Commercial real estate $ 249,249 $ — $ — $ 249,249 $ 1,948 $ 251,197 Consumer real estate 93,181 — — 93,181 604 93,785 Construction and land development 52,522 — — 52,522 — 52,522 Commercial and industrial 338,106 6,230 9,106 353,442 — 353,442 Consumer 8,543 — — 8,543 125 8,668 Other 50,197 — — 50,197 — 50,197 Total $ 791,798 $ 6,230 $ 9,106 $ 807,134 $ 2,677 $ 809,811 None of the Company’s loans had a risk rating of “Doubtful” as of September 30, 2016 or December 31, 2015. The following tables detail the changes in the ALLL from December 31, 2014 to December 31, 2015 and December 31, 2015 to September 30, 2016 by loan classification and the allocation of the ALLL (in thousands): Commercial real estate Consumer real estate Construction and land development Commercial and industrial Consumer Other Total Allowance for Loan and Lease Losses: Balances, December 31, 2014 $ 1,535 $ 621 $ 408 $ 8,540 $ 75 $ 103 $ 11,282 Charged-off loans — (173 ) — (3,033 ) — — (3,206 ) Recoveries 31 68 — 299 7 — 405 Provision for loan and lease losses 1,313 452 506 (1,113 ) 21 472 1,651 Balances, December 31, 2015 $ 2,879 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 10,132 Collectively evaluated for impairment $ 2,314 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 9,567 Individually evaluated for impairment 565 — — — — — 565 Loans acquired with deteriorated credit quality — — — — — — — Balances, December 31, 2015 $ 2,879 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 10,132 Loans: Collectively evaluated for impairment $ 249,249 $ 93,181 $ 52,522 $ 353,442 $ 8,543 $ 50,197 $ 807,134 Individually evaluated for impairment 1,948 604 — — 125 — 2,677 Loans acquired with deteriorated credit quality — — — — — — — Balances, December 31, 2015 $ 251,197 $ 93,785 $ 52,522 $ 353,442 $ 8,668 $ 50,197 $ 809,811 Commercial real estate Consumer real estate Construction and land development Commercial and industrial Consumer Other Total Allowance for Loan and Lease Losses: Balances, December 31, 2015 $ 2,879 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 10,132 Charged-off loans (350 ) — — (956 ) (146 ) — (1,452 ) Recoveries 52 — 18 — 1 — 71 Provision for loan and lease losses (161 ) 4 732 1,831 128 225 2,759 Balances, September 30, 2016 $ 2,420 $ 972 $ 1,664 $ 5,568 $ 86 $ 800 $ 11,510 Collectively evaluated for impairment $ 2,319 $ 972 $ 1,664 $ 5,068 $ 86 $ 800 $ 10,909 Individually evaluated for impairment 101 — — 500 — — 601 Loans acquired with deteriorated credit quality — — — — — — — Balances, September 30, 2016 $ 2,420 $ 972 $ 1,664 $ 5,568 $ 86 $ 800 $ 11,510 Loans: Collectively evaluated for impairment $ 271,219 $ 96,919 $ 91,366 $ 386,922 $ 7,046 $ 67,806 $ 921,278 Individually evaluated for impairment 1,327 — — 2,796 — — 4,123 Loans acquired with deteriorated credit quality — — — — — — — Balances, September 30, 2016 $ 272,546 $ 96,919 $ 91,366 $ 389,718 $ 7,046 $ 67,806 $ 925,401 The following table presents the allocation of the ALLL for each respective loan category with the corresponding percentage of loans in each category to total loans, net of deferred fees as of September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Amount Percent of total loans, net of deferred fees Amount Percent of total loans, net of deferred fees Commercial real estate $ 2,420 0.26 % $ 2,879 0.36 % Consumer real estate 972 0.11 968 0.12 Construction and land development 1,664 0.18 914 0.11 Commercial and industrial 5,568 0.60 4,693 0.58 Consumer 86 0.01 103 0.01 Other 800 0.09 575 0.07 Total allowance for loan and lease losses $ 11,510 1.25 % $ 10,132 1.25 % The following table presents the Company’s impaired loans that were evaluated for specific loss allowance as of September 30, 2016 and December 31, 2015 (in thousands): Nine Months Ended September 30, 2016 September 30, 2016 Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized With no related allowance recorded: Commercial real estate $ — $ — $ — $ — $ — Consumer real estate — — — 302 — Construction and land development — — — — — Commercial and industrial — — — — — Consumer — — — 63 — Other — — — — — Subtotal — — — 365 — With an allowance recorded: Commercial real estate 1,327 1,689 101 1,638 — Consumer real estate — — — — — Construction and land development — — — — — Commercial and industrial 2,796 3,491 500 1,398 — Consumer — — — — — Other — — — — — Subtotal 4,123 5,180 601 3,036 — Total $ 4,123 $ 5,180 $ 601 $ 3,400 $ — Year End December 31, 2015 December 31, 2015 Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized With no related allowance recorded: Commercial real estate $ — $ — $ — $ 42 $ — Consumer real estate 604 681 — 357 — Construction and land development — — — — — Commercial and industrial — — — 594 — Consumer 125 125 — 63 5 Other — — — — — Subtotal 729 806 — 1,056 5 With an allowance recorded: Commercial real estate 1,948 1,948 565 2,015 — Consumer real estate — — — 262 — Construction and land development — — — 568 — Commercial and industrial — — — 1,309 — Consumer — — — — — Other — — — — — Subtotal 1,948 1,948 565 4,154 — Total $ 2,677 $ 2,754 $ 565 $ 5,210 $ 5 The following table presents the aging of the recorded investment in past-due loans as of September 30, 2016 and December 31, 2015 by class of loans (in thousands): 30 - 59 60 - 89 Greater Than Days Days 89 Days Total Loans Not September 30, 2016 Past Due Past Due Past Due Past Due Past Due Total Commercial real estate $ — $ — $ — $ — $ 272,546 $ 272,546 Consumer real estate 11 284 — 295 96,624 96,919 Construction and land development — — — — 91,366 91,366 Commercial and industrial — 591 — 591 389,127 389,718 Consumer 11 — — 11 7,035 7,046 Other — — — — 67,806 67,806 Total $ 22 $ 875 $ — $ 897 $ 924,504 $ 925,401 December 31, 2015 Commercial real estate $ — $ — $ 1,948 $ 1,948 $ 249,249 $ 251,197 Consumer real estate 100 54 616 770 93,015 93,785 Construction and land development — — — — 52,522 52,522 Commercial and industrial — — — — 353,442 353,442 Consumer — — 125 125 8,543 8,668 Other — — — — 50,197 50,197 Total $ 100 $ 54 $ 2,689 $ 2,843 $ 806,968 $ 809,811 The Company had no loans past due 90 days or more that were not on nonaccrual status as of September 30, 2016 and December 31, 2015. The following table presents the recorded investment in non-accrual loans and troubled debt restructurings (TDR) by class of loans as of September 30, 2016 and December 31, 2015 (in thousands): Non-Accrual Troubled Debt Restructurings September 30, 2016 December 31, 2015 September 30, 2016 December 31, 2015 Commercial real estate $ 1,327 $ 1,948 $ 1,288 $ — Consumer real estate 0 616 — — Construction and land development — — — — Commercial and industrial 2,796 — — — Consumer — 125 — 125 Other — — — — Total $ 4,123 $ 2,689 $ 1,288 $ 125 As of September 30, 2016 and December 31, 2015, all loans classified as nonperforming were deemed to be impaired. As of September 30, 2016 and December 31, 2015, the Company had a recorded investment in TDR of $1.3 million and $0.1 million, respectively. The Company allocated $0.1 and $0 million of specific allowance for those loans at September 30, 2016 and December 31, 2015 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, 2016 and 2015 (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 2016 Commercial real estate — $ — $ — 1 $ 1,948 $ 1,170 Consumer real estate — — — — — — Construction and land development — — — — — — Commercial and industrial — — — — — — Consumer — — — — — — Other — — — — — — Total — $ — $ — 1 $ 1,948 $ 1,170 2015 Commercial real estate — $ — $ — — $ — $ — Consumer real estate — — — — — — Construction and land development — — — — — — Commercial and industrial — — — — — — Consumer — — — 1 125 125 Other — — — — — — Total — $ — $ — 1 $ 125 $ 125 The following table presents loans by class modified as TDR for which there was a payment default within twelve months following the modification during the three and nine months ended September 30, 2016 and 2015 (in thousands). Three Months Ended Nine Months Ended September 30, September 30, Number of contracts Recorded investment Number of contracts Recorded investment 2016 Commercial real estate — $ — — $ — Consumer real estate — — — — Construction and land development — — — — Commercial and industrial — — — — Consumer — — 1 124 Other — — — — Total — $ — 1 $ 124 2015 Commercial real estate — $ — — $ — Consumer real estate — — — — Construction and land development — — — — Commercial and industrial — — 1 — Consumer — — — — Other — — — — Total — $ — 1 $ — The consumer loan TDR that subsequently defaulted during the nine months ended September 30, 2016 had no specific reserve in the allowance for loan and lease losses and resulted in a $0.1 million charge-off. The commercial and industrial loan TDR that subsequently defaulted during the nine months ended September 30, 2015 had a $2.4 million specific reserve in the allowance for loan and lease losses and resulted in a $2.5 million charge-off. A loan is considered to be in payment default once it is 30 days contractually past due under the modified terms.

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances	9 Months Ended
	Sep. 30, 2016
Federal Home Loan Banks [Abstract]
Federal Home Loan Bank Advances	NOTE 4 – FEDERAL HOME LOAN BANK ADVANCES The Company had outstanding borrowings totaling of $30.0 million and $45.0 million at September 30, 2016 and December 31, 2015, respectively, via two separate 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, 2016 December 31, 2015 Year Amount Interest Rates Amount Interest Rates 2016 $ 15,000 1.02 % $ 45,000 0.57 % 2017 15,000 0.92 — — 2018 — — — — 2019 — — — — 2020 — — — — Thereafter — — — — Total $ 30,000 0.97 % $ 45,000 0.57 % Advances from the FHLB are collateralized by investment securities, FHLB stock and certain commercial and residential real estate mortgage loans totaling $101.3 million under a blanket mortgage collateral agreement. At September 30, 2016, the amount of available credit from the FHLB totaled $11.0 million.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2016
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	NOTE 5 – ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following were changes in accumulated other comprehensive income (loss) by component, net of tax, for the period ended September 30, 2016 and year ended December 31, 2015 (in thousands): Unrealized Gains Unrealized Gains and and Losses Losses on Losses on on Available Securities Cash Flow for Sale Transferred to Year Ended December 31, 2015 Hedges Securities Held to Maturity Total Beginning Balance $ (2,139 ) $ 723 $ (1,418 ) $ (2,834 ) Other comprehensive income (loss) before reclassification (1,542 ) (652 ) 206 (1,988 ) Amounts reclassified from accumulated other comprehensive income (23 ) 34 (103 ) (92 ) Net current period other comprehensive income (loss) (1,565 ) (618 ) 103 (2,080 ) Ending Balance $ (3,704 ) $ 105 $ (1,315 ) $ (4,914 ) Nine Months Ended September 30, 2016 Beginning Balance $ (3,704 ) $ 105 $ (1,315 ) $ (4,914 ) Other comprehensive income (loss) before reclassification (664 ) 1,596 154 1,087 Amounts reclassified from accumulated other comprehensive income (161 ) 75 (77 ) (163 ) Net current period other comprehensive income (loss) (825 ) 1,671 77 924 Ending Balance $ (4,529 ) $ 1,776 $ (1,238 ) $ (3,990 ) The following were significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the nine months ended September 30, 2016 (in thousands): Amount Reclassified from Affected Line Item Details about Accumulated Other Accumulated Other in the Statement Where Comprehensive Income Components Comprehensive Income Net Income is Presented Unrealized losses on cash flow hedges $ (113 ) Interest expense - money market (148 ) Interest expense - Federal Home Loan Bank advances 100 Income tax (expense) benefit $ (161 ) Net of tax Unrealized gains and losses on available for sale securities $ 121 Net gain on sale of securities (46 ) Income tax (expense) benefit $ 75 Net of tax Unrealized losses on securities transferred to held to maturity $ (125 ) Interest income - securities 48 Income tax (expense) benefit $ (77 ) Net of tax The following were significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the year ending December 31, 2015 (in thousands): Amount Reclassified from Affected Line Item Details about Accumulated Other Accumulated Other in the Statement Comprehensive Income Components Comprehensive Income Net Income is Presented Unrealized losses on cash flow hedges $ (37 ) Interest expense - money market 14 Income tax (expense) benefit $ (23 ) Net of tax Unrealized gains and losses on available for sale securities $ 55 Net gain on sale of securities (21 ) Income tax (expense) benefit $ 34 Net of tax Unrealized losses on securities transferred to held to maturity $ (167 ) Interest income - securities 64 Income tax (expense) benefit $ (103 ) Net of tax

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 6 – INCOME TAXES The Company’s effective tax rate for the three and nine months ended September 30, 2016 was 33.1% and 32.7%, respectively, compared to 29.0% and 31.2%, respectively for the three and nine months ended September 30, 2015. The effective tax rate compared favorably to the statutory federal rate of 34% 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.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 7 – 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, 2016 and December 31, 2015 (in thousands): Contract or notional amount September 30, 2016 December 31, 2015 Financial instruments whose contract amounts represent credit risk: Unused commitments to extend credit $ 482,257 $ 384,837 Standby letters of credit 10,658 13,450 Total $ 492,915 $ 398,287 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, 2016, will not have a material impact on the financial statements of the Company.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives	NOTE 8 – DERIVATIVES The Company utilizes interest rate swap agreements as part of its asset liability management strategy to help manage its interest rate risk position. 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 Forward starting interest rate swaps with notional amounts totaling $35 million and $35 million as of September 30, 2016 and December 31, 2015, respectively, 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 has been included in net income. Therefore, the aggregate fair value of the swaps is recorded in other assets (liabilities) with changes in fair value recorded in other comprehensive income (loss). The amount included in accumulated other comprehensive income (loss) would be reclassified to current earnings should the hedges no longer be considered effective. The Company expects the hedges to remain fully effective during the remaining terms of the swaps. Summary information about the interest-rate swaps designated as cash flow hedges was as follows (dollars in thousands): September 30, 2016 December 31, 2015 Notional amounts $ 35,000 $ 35,000 Weighted average pay rates 3.67 % 3.67 % Weighted average receive rates 3 month 3 month LIBOR Weighted average maturity 6.6 years 7.4 years Fair value $ (4,918 ) $ (3,158 ) Amount of unrealized loss recognized in accumulated other comprehensive income, net of tax $ (3,035 ) $ (1,949 ) Pursuant to its interest rate swap agreements, the Company pledged collateral to the counterparties in the form of investment securities with a carrying value of $7.2 million at September 30, 2016. There was no collateral posted from the counterparties to the Company as of September 30, 2016. It is possible that the Company may need to post additional collateral in the future or that the counterparties may be required to post collateral to the Company in the future. 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 (in thousands): September 30, 2016 December 31, 2015 Notional Estimated Notional Estimated amount fair value amount fair value Interest rate swap agreements: Pay fixed/receive variable swaps $ 42,580 $ 1,215 $ 45,675 $ (726 ) Pay variable/receive fixed swaps 42,580 (1,215 ) 45,675 726 Total $ 85,160 $ — $ 91,350 $ —

Stock Options and Restricted Sh

Stock Options and Restricted Shares	9 Months Ended
	Sep. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Options and Restricted Shares	NOTE 9 - STOCK OPTIONS AND RESTRICTED SHARES During 2008, the board of directors of the Bank approved the CapStar Bank 2008 Stock Incentive Plan (the Plan). The Plan was intended to provide incentives to certain officers, employees, and directors to stimulate their efforts toward the continued success of the Bank and to operate and manage the business in a manner that will provide for the long‑term growth and profitability of the Bank. Additionally the Plan was intended to encourage stock ownership to align the interests of employees and shareholders and to provide a means of obtaining, rewarding and retaining officers, employees, and directors. 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, 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 reserved 1,569,475 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 183,736 at September 30, 2016. 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 (in thousands): For three months ended For nine months ended September 30, September 30, 2016 2015 2016 2015 Stock-based compensation expense before income taxes $ 212 $ 116 $ 643 $ 289 Less: deferred tax benefit (70 ) (34 ) (210 ) (90 ) Reduction of net income $ 142 $ 83 $ 433 $ 199 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, 2016 follows: Weighted Average Restricted Grant Date Nonvested Shares Shares Fair Value Nonvested at beginning of period 138,453 $ 11.16 Granted 122,551 12.69 Vested (37,096 ) 10.38 Forfeited (14,767 ) 11.84 Nonvested at end of period 209,141 $ 12.15 As of September 30, 2016, there was $1.7 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 2.2 years. The total fair value of shares vested during the nine months ended September 30, 2016 and 2015 was $0.5 and $0.2 million. 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 three 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 calculations performed by management using industry data. The Company’s expected dividend yield is 0.00% because the Company has not paid dividends in the past. The expected term of options granted was calculated using the “simplified” method for plain vanilla options as permitted under authoritative literature. 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. The fair value of options granted was determined using the following weighted average assumptions as of the grant date: 2016 2015 Dividend yield — — Expected term (in years) 7.48 7.29 Expected stock price volatility 17.20 % 21.26 % Risk-free interest rate 1.66 % 1.86 % Pre-vest forfeiture rate 10.25 % 10.33 % A summary of the activity in stock options for the nine months ended September 30, 2016 follows: Weighted Weighted Average Average Remaining Exercise Contractual Shares Price Term (years) Outstanding at beginning of period 1,018,500 $ 10.42 Granted 32,500 13.22 Exercised — — Forfeited or expired (21,875 ) 10.18 Outstanding at end of period 1,029,125 $ 10.51 3.5 Fully vested and expected to vest 1,015,297 $ 10.49 3.4 Exercisable at end of period 912,875 $ 10.31 2.9 Information related to stock options during each year follows: 2016 2015 Intrinsic value of options exercised $ — $ 1,410 Cash received from option exercises — 10,000 Tax benefit realized from option exercises — 900 Weighted average fair value of options granted 3.16 3.20 As of September 30, 2016, 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 2.80 years.

Regulatory Capital Requirements

Regulatory Capital Requirements	9 Months Ended
	Sep. 30, 2016
Banking And Thrift [Abstract]
Regulatory Capital Requirements	NOTE 10 – 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, 2016, 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, 2016 are presented in the following table (in thousands). Only the Bank’s capital amounts and ratios are presented as of December 31, 2015 because the share exchange had not yet occurred. Actual Minimum capital requirement (1) Minimum to be well-capitalized (2) Amount Ratio Amount Ratio Amount Ratio At September 30, 2016: Total capital to risk-weighted assets: CapStar Financial Holdings, Inc. $ 146,576 12.5 % $ 94,163 8.0 % $N/A N/A CapStar Bank 123,228 10.5 94,163 8.0 117,704 10.0 Tier I capital to risk-weighted assets: CapStar Financial Holdings, Inc. 134,900 11.5 70,623 6.0 N/A N/A CapStar Bank 111,552 9.5 70,623 6.0 94,163 8.0 Common equity Tier 1 capital to risk weighted assets: CapStar Financial Holdings, Inc. 126,531 10.7 52,967 4.5 N/A N/A CapStar Bank 95,683 8.1 52,967 4.5 76,508 6.5 Tier I capital to average assets: CapStar Financial Holdings, Inc. 134,900 10.5 51,562 4.0 N/A N/A CapStar Bank 111,552 8.7 51,543 4.0 64,429 5.0 At December Total capital to risk-weighted assets $ 116,047 11.4 % $ 81,224 8.0 % $ 101,530 10.0 % Tier I capital to risk-weighted assets 105,749 10.4 60,918 6.0 81,224 8.0 Common equity tier 1 capital 90,272 8.9 45,688 4.5 65,994 6.5 Tier I capital to average assets 105,749 9.3 45,328 4.0 56,660 5.0 (1) For the calendar year 2016, 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 0.625% 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.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 11 – 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, 2016 and 2015: Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Basic net income per share calculation: Numerator – Net income $ 2,109,222 $ 2,036,467 $ 6,169,318 $ 5,466,469 Denominator – Average common shares outstanding 8,792,665 8,554,802 8,701,596 8,526,840 Basic net income per share $ 0.24 $ 0.24 $ 0.71 $ 0.64 Diluted net income per share calculation: Numerator – Net income $ 2,109,222 $ 2,036,467 $ 6,169,318 $ 5,466,469 Denominator – Average common shares outstanding 8,792,665 8,554,802 8,701,596 8,526,840 Dilutive shares contingently issuable 2,006,871 1,852,919 1,981,380 1,837,438 Average diluted common shares outstanding 10,799,536 10,407,721 10,682,976 10,364,278 Diluted net income per share $ 0.20 $ 0.20 $ 0.58 $ 0.53

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value	NOTE 12 – 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 Derivatives-Interest Rate Swaps Impaired Loans Other Real Estate Owned Loans Held For Sale Assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands): Fair value measurements at September 30, 2016 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 $ 7,607 $ — $ 7,607 $ — Obligations of states and political subdivisions 20,499 — 20,499 — Mortage-backed securities-residential 118,427 — 118,427 — Asset-backed securities 20,680 — 20,680 — Total securities available for sale $ 167,213 $ — $ 167,213 $ — Derivatives: Interest rate swaps - customer related $ 1,215 $ — $ 1,215 $ — Liabilities: Derivatives: Interest rate swaps - customer related $ (1,215 ) $ — $ (1,215 ) $ — Interest rate swaps - cash flow hedges (4,918 ) — (4,918 ) — Total derivatives $ (6,133 ) $ — $ (6,133 ) $ — Fair value measurements at December 31, 2015 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 $ 19,542 $ — $ 19,542 $ — Obligations of states and political subdivisions 13,868 — 13,868 — Mortage-backed securities-residential 118,380 — 118,380 — Asset-backed securities 21,593 3,526 18,067 — Total securities available for sale $ 173,383 $ 3,526 $ 169,857 $ — Derivatives: Interest rate swaps - customer related $ 726 $ — $ 726 $ — Liabilities: Derivatives: Interest rate swaps - customer related $ (726 ) $ — $ (726 ) $ — Interest rate swaps - cash flow hedges (3,158 ) — (3,158 ) — Total derivatives $ (3,884 ) $ — $ (3,884 ) $ — Assets measured at fair value on a nonrecurring basis are summarized below (in thousands): Fair value measurements at September 30, 2016 Quoted prices in active Significant markets for other Significant identical observable unobservable Carrying assets inputs inputs Value (level 1) (level 2) (level 3) Assets: Impaired loans: Commercial real estate $ 1,327 — — 1,327 Commercial and industrial 2,796 — — 2,796 Fair value measurements at December 31, 2015 Quoted prices in active Significant markets for other Significant identical observable unobservable Carrying assets inputs inputs Value (level 1) (level 2) (level 3) Assets: Impaired loans: Commercial real estate $ 1,383 — — 1,383 Other real estate owned: Construction and land development 216 — — 216 The following table presents quantitative information about Level 3 fair value measurements for assets measured at fair value on a non-recurring basis at September 30, 2016 and December 31, 2015 (dollars in thousands): Range Fair Valuation (Weighted- September 30, 2016 Value Technique(s) Unobservable Input(s) Average) Impaired loans: Commercial real estate $ 1,327 Sales comparison approach Appraisal discounts 10 % Commercial and industrial 2,796 Sales comparison approach Appraisal discounts 25 % Range Fair Valuation (Weighted- December 31, 2015 Value Technique(s) Unobservable Input(s) Average) Impaired loans: Commercial real estate $ 1,383 Sales comparison approach Appraisal discounts 20 % Other real estate owned: Construction and land development 216 Sales comparison approach Appraisal discounts 15 % Fair Value of Financial Instruments The carrying value and estimated fair values of the Bank’s financial instruments at September 30, 2016 and December 31, 2015 were as follows (in thousands): September 30, 2016 December 31, 2015 Carrying Carrying amount Fair value amount Fair value Financial assets: Cash and due from banks, interest-bearing deposits in financial institutions $ 73,256 $ 73,256 $ 93,455 $ 93,455 Federal funds sold 195 195 6,730 6,730 Securities available for sale 167,213 167,213 173,383 173,383 Securities held to maturity 46,228 50,665 43,094 46,459 Loans held for sale 61,252 62,620 35,729 36,552 Restricted equity securities 5,526 N/A 5,414 N/A Loans, net 924,031 927,333 798,264 806,030 Accrued interest receivable 3,813 3,813 3,030 3,030 Bank owned life insurance 21,750 21,750 21,299 21,299 Other assets 1,215 1,215 726 726 Financial liabilities: Deposits 1,136,060 1,112,683 1,038,460 1,035,978 Securities sold under repurchase agreements — — 3,755 3,755 Federal Home Loan Bank advances 30,000 29,985 45,000 44,926 Accrued interest payable 202 202 177 177 Other liabilities 8,713 8,713 6,536 6,536 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, net The fair value of the Bank’s loan portfolio includes a credit risk assumption in the determination of the fair value of its loans. This credit risk assumption is intended to approximate the fair value that a market participant would realize in a hypothetical orderly transaction. The Bank’s loan portfolio is initially fair valued using a segmented approach. The Bank divides its loan portfolio into the following categories: variable rate loans, impaired loans and all other loans. The results are then adjusted to account for credit risk. For variable‑rate loans that reprice frequently and have no significant change in credit risk, fair values approximate carrying values. Fair values for impaired loans are estimated using discounted cash flow models or based on the fair value of the underlying collateral. For other loans, fair values are estimated using discounted cash flow models, using current market interest rates offered for loans with similar terms to borrowers of similar credit quality. The values derived from the discounted cash flow approach for each of the above portfolios are then further discounted to incorporate credit risk. The methods utilized to estimate the fair value of loans do not necessarily represent an exit price. (e) Bank Owned Life Insurance For bank owned life insurance, the carrying amount is based on the cash surrender value and is a reasonable estimate of fair value. (f) Other Assets Included in other assets are certain interest rate swap agreements and the cash flow hedge relationships. The fair values of interest rate swap agreements and the cash flow hedge relationships are based on independent pricing services that utilize pricing models with observable market inputs. (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) Securities Sold under Repurchase Agreements The securities sold under repurchase agreements are payable upon demand. For this reason, the carrying amount is a reasonable estimate of fair value. (i) 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. (j) Accrued Interest Receivable/Payable The carrying amounts of accrued interest approximate fair value. (k) Other Liabilities Included in other liabilities are certain interest rate swap agreements, the cash flow hedge relationships and contingent consideration. The fair values of interest rate swap agreements and the cash flow hedge relationships are based on independent pricing services that utilize pricing models with observable market inputs. The fair value of contingent consideration is estimated by a discounted cash flow model that utilizes various unobservable inputs. (l) 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. (m) 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.

Summary of Significant Accoun20

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited consolidated financial statements as of and for the period ended September 30, 2016 include CapStar Financial Holdings, Inc. and it’s wholly owned subsidiary, CapStar Bank (the “Bank”, together referred to as the “Company”). Significant intercompany transactions and accounts are eliminated in consolidation. The financial statements as of December 31, 2015 and for the periods ended September 30, 2015 only include CapStar Bank because the share exchange pursuant to which CapStar Financial Holdings, Inc., a bank holding company and a Tennessee corporation, became the parent company of CapStar Bank had not yet taken place. On February 5, 2016, CapStar Financial Holdings, Inc. acquired all of the Bank’s issued and outstanding shares of common stock, preferred stock, common stock options and warrants, and the Bank became the wholly owned subsidiary of CapStar Financial Holdings, Inc. 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 CapStar Bank’s audited financial statements included in the Prospectus.
Initial Public Offering	Initial Public Offering On September 21, 2016, the Securities and Exchange Commission (SEC) declared effective our registration statement on Form S-1 registering the shares of our common stock. On September 27, 2016, we completed the initial public offering of 2,972,750 shares of our common stock. Of the 2,972,750 shares sold, 1,688,049 shares were sold by us and 1,284,701 shares were sold by certain selling shareholders. Of the 1,284,701 shares sold by certain selling shareholders, 731,707 were from preferred shares converted to common shares and 79,166 from the cashless exercise of 250,000 common share warrants. We received net proceeds of approximately $21.9 million from the offering, after deducting the underwriting discounts and commissions and estimated offering expenses. We did not receive any proceeds from the sale of shares by the selling shareholders.
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 and lease losses, determination of impairment of intangible assets, including goodwill, the valuation of our investment portfolio, deferred tax assets and estimated liabilities. There have been no significant changes to the Company’s significant accounting policies as disclosed in CapStar Bank’s audited financial statements for the year ended December 31, 2015 included in the Prospectus.
Subsequent Events	Subsequent Events 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, 2016 through the date of the issued financial statements.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 and December 31, 2015 are summarized as follows (in thousands): September 30, 2016 December 31, 2015 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 $ 7,529 $ 79 $ (1 ) $ 7,607 $ 19,562 $ 16 $ (36 ) $ 19,542 State and municipal securities 20,072 499 (72 ) 20,499 13,776 99 (7 ) 13,868 Mortgage-backed securities 117,542 1,073 (188 ) 118,427 119,828 13 (1,461 ) 118,380 Asset-backed securities 21,959 — (1,279 ) 20,680 22,814 — (1,221 ) 21,593 Total $ 167,102 $ 1,651 $ (1,540 ) $ 167,213 $ 175,980 $ 128 $ (2,725 ) $ 173,383 Securities held to maturity: State and municipal securities $ 36,819 $ 4,144 $ — $ 40,963 $ 37,005 $ 3,245 $ — $ 40,250 Mortgage-backed securities 5,109 258 — 5,367 6,089 120 — 6,209 Other debt securities 4,300 35 — 4,335 — — — — Total $ 46,228 $ 4,437 $ — $ 50,665 $ 43,094 $ 3,365 $ — $ 46,459
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, 2016 and December 31, 2015, and the length of time they were in continuous loss positions as of such dates are as follows (in thousands): Less than 12 months 12 months or more Total September 30, 2016 Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses Estimated fair value Gross unrealized losses U. S. government agency securities $ 2,014 $ (1 ) $ — $ — $ 2,014 $ (1 ) State and municipal securities 5,980 (72 ) — — 5,980 (72 ) Mortgage-backed securities 23,657 (123 ) 4,622 (65 ) 28,279 (188 ) Asset-backed securities — — 20,680 (1,279 ) 20,680 (1,279 ) Total available for sale $ 31,651 $ (196 ) $ 25,302 $ (1,344 ) $ 56,953 $ (1,540 ) December 31, 2015 U. S. government agency securities $ 13,100 $ (36 ) $ — $ — $ 13,100 $ (36 ) State and municipal securities 3,099 (7 ) — — 3,099 (7 ) Mortgage-backed securities 97,154 (1,068 ) 16,260 (393 ) 113,414 (1,461 ) Asset-backed securities — — 21,593 (1,221 ) 21,593 (1,221 ) Total available for sale $ 113,353 $ (1,111 ) $ 37,853 $ (1,614 ) $ 151,206 $ (2,725 )
Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of securities at September 30, 2016, by contractual maturity, are shown below (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 one to five years $ 9,717 $ 9,816 $ 23,341 $ 25,425 Due five to ten years 17,360 17,773 16,657 18,582 Due beyond ten years 524 517 1,121 1,291 Mortgage-backed securities 117,542 118,427 5,109 5,367 Asset-backed securities 21,959 20,680 — — $ 167,102 $ 167,213 $ 46,228 $ 50,665

Loans and Allowance for Loan 22

Loans and Allowance for Loan and Lease Losses (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Summary of Loan Portfolio	A summary of the loan portfolio as of September 30, 2016 and December 31, 2015 follows (in thousands): September 30, 2016 December 31, 2015 Commercial real estate $ 272,546 $ 251,197 Consumer real estate 96,919 93,785 Construction and land development 91,366 52,522 Commercial and industrial 389,718 353,442 Consumer 7,046 8,668 Other 67,806 50,197 Total 925,401 809,811 Less net unearned income (1,370 ) (1,415 ) 924,031 808,396 Allowance for loan and lease losses (11,510 ) (10,132 ) $ 912,521 $ 798,264
Summary of Loans by Risk Rating	The following tables present the loan balances by category as well as risk rating (in thousands): Performing Loans September 30, 2016 Pass/Watch Special Mention Substandard Total Performing Total Loans Total Commercial real estate $ 271,219 $ — $ — $ 271,219 $ 1,327 $ 272,546 Consumer real estate 96,624 — 295 96,919 — 96,919 Construction and land development 91,366 — — 91,366 — 91,366 Commercial and industrial 361,863 8,691 16,368 386,922 2,796 389,718 Consumer 7,029 — 17 7,046 — 7,046 Other 67,806 — — 67,806 — 67,806 Total $ 895,907 $ 8,691 $ 16,680 $ 921,278 $ 4,123 $ 925,401 December 31, 2015 Commercial real estate $ 249,249 $ — $ — $ 249,249 $ 1,948 $ 251,197 Consumer real estate 93,181 — — 93,181 604 93,785 Construction and land development 52,522 — — 52,522 — 52,522 Commercial and industrial 338,106 6,230 9,106 353,442 — 353,442 Consumer 8,543 — — 8,543 125 8,668 Other 50,197 — — 50,197 — 50,197 Total $ 791,798 $ 6,230 $ 9,106 $ 807,134 $ 2,677 $ 809,811
Summary of Changes in Allowance for Loan Losses by Loan Classification	The following tables detail the changes in the ALLL from December 31, 2014 to December 31, 2015 and December 31, 2015 to September 30, 2016 by loan classification and the allocation of the ALLL (in thousands): Commercial real estate Consumer real estate Construction and land development Commercial and industrial Consumer Other Total Allowance for Loan and Lease Losses: Balances, December 31, 2014 $ 1,535 $ 621 $ 408 $ 8,540 $ 75 $ 103 $ 11,282 Charged-off loans — (173 ) — (3,033 ) — — (3,206 ) Recoveries 31 68 — 299 7 — 405 Provision for loan and lease losses 1,313 452 506 (1,113 ) 21 472 1,651 Balances, December 31, 2015 $ 2,879 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 10,132 Collectively evaluated for impairment $ 2,314 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 9,567 Individually evaluated for impairment 565 — — — — — 565 Loans acquired with deteriorated credit quality — — — — — — — Balances, December 31, 2015 $ 2,879 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 10,132 Loans: Collectively evaluated for impairment $ 249,249 $ 93,181 $ 52,522 $ 353,442 $ 8,543 $ 50,197 $ 807,134 Individually evaluated for impairment 1,948 604 — — 125 — 2,677 Loans acquired with deteriorated credit quality — — — — — — — Balances, December 31, 2015 $ 251,197 $ 93,785 $ 52,522 $ 353,442 $ 8,668 $ 50,197 $ 809,811 Commercial real estate Consumer real estate Construction and land development Commercial and industrial Consumer Other Total Allowance for Loan and Lease Losses: Balances, December 31, 2015 $ 2,879 $ 968 $ 914 $ 4,693 $ 103 $ 575 $ 10,132 Charged-off loans (350 ) — — (956 ) (146 ) — (1,452 ) Recoveries 52 — 18 — 1 — 71 Provision for loan and lease losses (161 ) 4 732 1,831 128 225 2,759 Balances, September 30, 2016 $ 2,420 $ 972 $ 1,664 $ 5,568 $ 86 $ 800 $ 11,510 Collectively evaluated for impairment $ 2,319 $ 972 $ 1,664 $ 5,068 $ 86 $ 800 $ 10,909 Individually evaluated for impairment 101 — — 500 — — 601 Loans acquired with deteriorated credit quality — — — — — — — Balances, September 30, 2016 $ 2,420 $ 972 $ 1,664 $ 5,568 $ 86 $ 800 $ 11,510 Loans: Collectively evaluated for impairment $ 271,219 $ 96,919 $ 91,366 $ 386,922 $ 7,046 $ 67,806 $ 921,278 Individually evaluated for impairment 1,327 — — 2,796 — — 4,123 Loans acquired with deteriorated credit quality — — — — — — — Balances, September 30, 2016 $ 272,546 $ 96,919 $ 91,366 $ 389,718 $ 7,046 $ 67,806 $ 925,401
Allocation of ALLL with Corresponding Percentage of Loans in Each Category to Total Loans, Net of Deferred Fee	The following table presents the allocation of the ALLL for each respective loan category with the corresponding percentage of loans in each category to total loans, net of deferred fees as of September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Amount Percent of total loans, net of deferred fees Amount Percent of total loans, net of deferred fees Commercial real estate $ 2,420 0.26 % $ 2,879 0.36 % Consumer real estate 972 0.11 968 0.12 Construction and land development 1,664 0.18 914 0.11 Commercial and industrial 5,568 0.60 4,693 0.58 Consumer 86 0.01 103 0.01 Other 800 0.09 575 0.07 Total allowance for loan and lease losses $ 11,510 1.25 % $ 10,132 1.25 %
Summary of Impaired Loans Evaluated for Specific Loss Allowance	The following table presents the Company’s impaired loans that were evaluated for specific loss allowance as of September 30, 2016 and December 31, 2015 (in thousands): Nine Months Ended September 30, 2016 September 30, 2016 Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized With no related allowance recorded: Commercial real estate $ — $ — $ — $ — $ — Consumer real estate — — — 302 — Construction and land development — — — — — Commercial and industrial — — — — — Consumer — — — 63 — Other — — — — — Subtotal — — — 365 — With an allowance recorded: Commercial real estate 1,327 1,689 101 1,638 — Consumer real estate — — — — — Construction and land development — — — — — Commercial and industrial 2,796 3,491 500 1,398 — Consumer — — — — — Other — — — — — Subtotal 4,123 5,180 601 3,036 — Total $ 4,123 $ 5,180 $ 601 $ 3,400 $ — Year End December 31, 2015 December 31, 2015 Recorded investment Unpaid principal balance Related allowance Average recorded investment Interest income recognized With no related allowance recorded: Commercial real estate $ — $ — $ — $ 42 $ — Consumer real estate 604 681 — 357 — Construction and land development — — — — — Commercial and industrial — — — 594 — Consumer 125 125 — 63 5 Other — — — — — Subtotal 729 806 — 1,056 5 With an allowance recorded: Commercial real estate 1,948 1,948 565 2,015 — Consumer real estate — — — 262 — Construction and land development — — — 568 — Commercial and industrial — — — 1,309 — Consumer — — — — — Other — — — — — Subtotal 1,948 1,948 565 4,154 — Total $ 2,677 $ 2,754 $ 565 $ 5,210 $ 5
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, 2016 and December 31, 2015 by class of loans (in thousands): 30 - 59 60 - 89 Greater Than Days Days 89 Days Total Loans Not September 30, 2016 Past Due Past Due Past Due Past Due Past Due Total Commercial real estate $ — $ — $ — $ — $ 272,546 $ 272,546 Consumer real estate 11 284 — 295 96,624 96,919 Construction and land development — — — — 91,366 91,366 Commercial and industrial — 591 — 591 389,127 389,718 Consumer 11 — — 11 7,035 7,046 Other — — — — 67,806 67,806 Total $ 22 $ 875 $ — $ 897 $ 924,504 $ 925,401 December 31, 2015 Commercial real estate $ — $ — $ 1,948 $ 1,948 $ 249,249 $ 251,197 Consumer real estate 100 54 616 770 93,015 93,785 Construction and land development — — — — 52,522 52,522 Commercial and industrial — — — — 353,442 353,442 Consumer — — 125 125 8,543 8,668 Other — — — — 50,197 50,197 Total $ 100 $ 54 $ 2,689 $ 2,843 $ 806,968 $ 809,811
Schedule of Recorded In Non Accrual Loans and Troubled Debt Restructurings	The following table presents the recorded investment in non-accrual loans and troubled debt restructurings (TDR) by class of loans as of September 30, 2016 and December 31, 2015 (in thousands): Non-Accrual Troubled Debt Restructurings September 30, 2016 December 31, 2015 September 30, 2016 December 31, 2015 Commercial real estate $ 1,327 $ 1,948 $ 1,288 $ — Consumer real estate 0 616 — — Construction and land development — — — — Commercial and industrial 2,796 — — — Consumer — 125 — 125 Other — — — — Total $ 4,123 $ 2,689 $ 1,288 $ 125
Schedule of Presents 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, 2016 and 2015 (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 2016 Commercial real estate — $ — $ — 1 $ 1,948 $ 1,170 Consumer real estate — — — — — — Construction and land development — — — — — — Commercial and industrial — — — — — — Consumer — — — — — — Other — — — — — — Total — $ — $ — 1 $ 1,948 $ 1,170 2015 Commercial real estate — $ — $ — — $ — $ — Consumer real estate — — — — — — Construction and land development — — — — — — Commercial and industrial — — — — — — Consumer — — — 1 125 125 Other — — — — — — Total — $ — $ — 1 $ 125 $ 125
Schedule of Loans by Class Modified as TDR for the Payment Default Within Twelve Months	The following table presents loans by class modified as TDR for which there was a payment default within twelve months following the modification during the three and nine months ended September 30, 2016 and 2015 (in thousands). Three Months Ended Nine Months Ended September 30, September 30, Number of contracts Recorded investment Number of contracts Recorded investment 2016 Commercial real estate — $ — — $ — Consumer real estate — — — — Construction and land development — — — — Commercial and industrial — — — — Consumer — — 1 124 Other — — — — Total — $ — 1 $ 124 2015 Commercial real estate — $ — — $ — Consumer real estate — — — — Construction and land development — — — — Commercial and industrial — — 1 — Consumer — — — — Other — — — — Total — $ — 1 $ —

Federal Home Loan Bank Advanc23

Federal Home Loan Bank Advances (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 December 31, 2015 Year Amount Interest Rates Amount Interest Rates 2016 $ 15,000 1.02 % $ 45,000 0.57 % 2017 15,000 0.92 — — 2018 — — — — 2019 — — — — 2020 — — — — Thereafter — — — — Total $ 30,000 0.97 % $ 45,000 0.57 %

Accumulated Other Comprehensi24

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2016
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 period ended September 30, 2016 and year ended December 31, 2015 (in thousands): Unrealized Gains Unrealized Gains and and Losses Losses on Losses on on Available Securities Cash Flow for Sale Transferred to Year Ended December 31, 2015 Hedges Securities Held to Maturity Total Beginning Balance $ (2,139 ) $ 723 $ (1,418 ) $ (2,834 ) Other comprehensive income (loss) before reclassification (1,542 ) (652 ) 206 (1,988 ) Amounts reclassified from accumulated other comprehensive income (23 ) 34 (103 ) (92 ) Net current period other comprehensive income (loss) (1,565 ) (618 ) 103 (2,080 ) Ending Balance $ (3,704 ) $ 105 $ (1,315 ) $ (4,914 ) Nine Months Ended September 30, 2016 Beginning Balance $ (3,704 ) $ 105 $ (1,315 ) $ (4,914 ) Other comprehensive income (loss) before reclassification (664 ) 1,596 154 1,087 Amounts reclassified from accumulated other comprehensive income (161 ) 75 (77 ) (163 ) Net current period other comprehensive income (loss) (825 ) 1,671 77 924 Ending Balance $ (4,529 ) $ 1,776 $ (1,238 ) $ (3,990 )
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 nine months ended September 30, 2016 (in thousands): Amount Reclassified from Affected Line Item Details about Accumulated Other Accumulated Other in the Statement Where Comprehensive Income Components Comprehensive Income Net Income is Presented Unrealized losses on cash flow hedges $ (113 ) Interest expense - money market (148 ) Interest expense - Federal Home Loan Bank advances 100 Income tax (expense) benefit $ (161 ) Net of tax Unrealized gains and losses on available for sale securities $ 121 Net gain on sale of securities (46 ) Income tax (expense) benefit $ 75 Net of tax Unrealized losses on securities transferred to held to maturity $ (125 ) Interest income - securities 48 Income tax (expense) benefit $ (77 ) Net of tax The following were significant amounts reclassified out of each component of accumulated other comprehensive income (loss) for the year ending December 31, 2015 (in thousands): Amount Reclassified from Affected Line Item Details about Accumulated Other Accumulated Other in the Statement Comprehensive Income Components Comprehensive Income Net Income is Presented Unrealized losses on cash flow hedges $ (37 ) Interest expense - money market 14 Income tax (expense) benefit $ (23 ) Net of tax Unrealized gains and losses on available for sale securities $ 55 Net gain on sale of securities (21 ) Income tax (expense) benefit $ 34 Net of tax Unrealized losses on securities transferred to held to maturity $ (167 ) Interest income - securities 64 Income tax (expense) benefit $ (103 ) Net of tax

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 and December 31, 2015 (in thousands): Contract or notional amount September 30, 2016 December 31, 2015 Financial instruments whose contract amounts represent credit risk: Unused commitments to extend credit $ 482,257 $ 384,837 Standby letters of credit 10,658 13,450 Total $ 492,915 $ 398,287

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 December 31, 2015 Notional amounts $ 35,000 $ 35,000 Weighted average pay rates 3.67 % 3.67 % Weighted average receive rates 3 month 3 month LIBOR Weighted average maturity 6.6 years 7.4 years Fair value $ (4,918 ) $ (3,158 ) Amount of unrealized loss recognized in accumulated other comprehensive income, net of tax $ (3,035 ) $ (1,949 )
Summary of Customer Related Interest Rate Swaps	A summary of the Company’s customer related interest rate swaps was as follows (in thousands): September 30, 2016 December 31, 2015 Notional Estimated Notional Estimated amount fair value amount fair value Interest rate swap agreements: Pay fixed/receive variable swaps $ 42,580 $ 1,215 $ 45,675 $ (726 ) Pay variable/receive fixed swaps 42,580 (1,215 ) 45,675 726 Total $ 85,160 $ — $ 91,350 $ —

Stock Options and Restricted 27

Stock Options and Restricted Shares (Tables)	9 Months Ended
	Sep. 30, 2016
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 (in thousands): For three months ended For nine months ended September 30, September 30, 2016 2015 2016 2015 Stock-based compensation expense before income taxes $ 212 $ 116 $ 643 $ 289 Less: deferred tax benefit (70 ) (34 ) (210 ) (90 ) Reduction of net income $ 142 $ 83 $ 433 $ 199
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, 2016 follows: Weighted Average Restricted Grant Date Nonvested Shares Shares Fair Value Nonvested at beginning of period 138,453 $ 11.16 Granted 122,551 12.69 Vested (37,096 ) 10.38 Forfeited (14,767 ) 11.84 Nonvested at end of period 209,141 $ 12.15
Summary of Fair Value of Options Granted Using Weighted Average Assumptions	The fair value of options granted was determined using the following weighted average assumptions as of the grant date: 2016 2015 Dividend yield — — Expected term (in years) 7.48 7.29 Expected stock price volatility 17.20 % 21.26 % Risk-free interest rate 1.66 % 1.86 % Pre-vest forfeiture rate 10.25 % 10.33 %
Summary of Activity in Stock Options	A summary of the activity in stock options for the nine months ended September 30, 2016 follows: Weighted Weighted Average Average Remaining Exercise Contractual Shares Price Term (years) Outstanding at beginning of period 1,018,500 $ 10.42 Granted 32,500 13.22 Exercised — — Forfeited or expired (21,875 ) 10.18 Outstanding at end of period 1,029,125 $ 10.51 3.5 Fully vested and expected to vest 1,015,297 $ 10.49 3.4 Exercisable at end of period 912,875 $ 10.31 2.9
Information Related to Stock Options	Information related to stock options during each year follows: 2016 2015 Intrinsic value of options exercised $ — $ 1,410 Cash received from option exercises — 10,000 Tax benefit realized from option exercises — 900 Weighted average fair value of options granted 3.16 3.20

Regulatory Capital Requiremen28

Regulatory Capital Requirements (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 are presented in the following table (in thousands). Only the Bank’s capital amounts and ratios are presented as of December 31, 2015 because the share exchange had not yet occurred. Actual Minimum capital requirement (1) Minimum to be well-capitalized (2) Amount Ratio Amount Ratio Amount Ratio At September 30, 2016: Total capital to risk-weighted assets: CapStar Financial Holdings, Inc. $ 146,576 12.5 % $ 94,163 8.0 % $N/A N/A CapStar Bank 123,228 10.5 94,163 8.0 117,704 10.0 Tier I capital to risk-weighted assets: CapStar Financial Holdings, Inc. 134,900 11.5 70,623 6.0 N/A N/A CapStar Bank 111,552 9.5 70,623 6.0 94,163 8.0 Common equity Tier 1 capital to risk weighted assets: CapStar Financial Holdings, Inc. 126,531 10.7 52,967 4.5 N/A N/A CapStar Bank 95,683 8.1 52,967 4.5 76,508 6.5 Tier I capital to average assets: CapStar Financial Holdings, Inc. 134,900 10.5 51,562 4.0 N/A N/A CapStar Bank 111,552 8.7 51,543 4.0 64,429 5.0 At December Total capital to risk-weighted assets $ 116,047 11.4 % $ 81,224 8.0 % $ 101,530 10.0 % Tier I capital to risk-weighted assets 105,749 10.4 60,918 6.0 81,224 8.0 Common equity tier 1 capital 90,272 8.9 45,688 4.5 65,994 6.5 Tier I capital to average assets 105,749 9.3 45,328 4.0 56,660 5.0

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
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, 2016 and 2015: Three Months Ended Nine Months Ended September 30, September 30, 2016 2015 2016 2015 Basic net income per share calculation: Numerator – Net income $ 2,109,222 $ 2,036,467 $ 6,169,318 $ 5,466,469 Denominator – Average common shares outstanding 8,792,665 8,554,802 8,701,596 8,526,840 Basic net income per share $ 0.24 $ 0.24 $ 0.71 $ 0.64 Diluted net income per share calculation: Numerator – Net income $ 2,109,222 $ 2,036,467 $ 6,169,318 $ 5,466,469 Denominator – Average common shares outstanding 8,792,665 8,554,802 8,701,596 8,526,840 Dilutive shares contingently issuable 2,006,871 1,852,919 1,981,380 1,837,438 Average diluted common shares outstanding 10,799,536 10,407,721 10,682,976 10,364,278 Diluted net income per share $ 0.20 $ 0.20 $ 0.58 $ 0.53

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2016
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 (in thousands): Fair value measurements at September 30, 2016 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 $ 7,607 $ — $ 7,607 $ — Obligations of states and political subdivisions 20,499 — 20,499 — Mortage-backed securities-residential 118,427 — 118,427 — Asset-backed securities 20,680 — 20,680 — Total securities available for sale $ 167,213 $ — $ 167,213 $ — Derivatives: Interest rate swaps - customer related $ 1,215 $ — $ 1,215 $ — Liabilities: Derivatives: Interest rate swaps - customer related $ (1,215 ) $ — $ (1,215 ) $ — Interest rate swaps - cash flow hedges (4,918 ) — (4,918 ) — Total derivatives $ (6,133 ) $ — $ (6,133 ) $ — Fair value measurements at December 31, 2015 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 $ 19,542 $ — $ 19,542 $ — Obligations of states and political subdivisions 13,868 — 13,868 — Mortage-backed securities-residential 118,380 — 118,380 — Asset-backed securities 21,593 3,526 18,067 — Total securities available for sale $ 173,383 $ 3,526 $ 169,857 $ — Derivatives: Interest rate swaps - customer related $ 726 $ — $ 726 $ — Liabilities: Derivatives: Interest rate swaps - customer related $ (726 ) $ — $ (726 ) $ — Interest rate swaps - cash flow hedges (3,158 ) — (3,158 ) — Total derivatives $ (3,884 ) $ — $ (3,884 ) $ —
Summary of Assets Measured at Fair Value on a Nonrecurring Basis	Assets measured at fair value on a nonrecurring basis are summarized below (in thousands): Fair value measurements at September 30, 2016 Quoted prices in active Significant markets for other Significant identical observable unobservable Carrying assets inputs inputs Value (level 1) (level 2) (level 3) Assets: Impaired loans: Commercial real estate $ 1,327 — — 1,327 Commercial and industrial 2,796 — — 2,796 Fair value measurements at December 31, 2015 Quoted prices in active Significant markets for other Significant identical observable unobservable Carrying assets inputs inputs Value (level 1) (level 2) (level 3) Assets: Impaired loans: Commercial real estate $ 1,383 — — 1,383 Other real estate owned: Construction and land development 216 — — 216
Summary of Quantitative Information About Level 3 Fair Value Measurements for Assets Measured at Fair Value on a Non-recurring Basis	The following table presents quantitative information about Level 3 fair value measurements for assets measured at fair value on a non-recurring basis at September 30, 2016 and December 31, 2015 (dollars in thousands): Range Fair Valuation (Weighted- September 30, 2016 Value Technique(s) Unobservable Input(s) Average) Impaired loans: Commercial real estate $ 1,327 Sales comparison approach Appraisal discounts 10 % Commercial and industrial 2,796 Sales comparison approach Appraisal discounts 25 % Range Fair Valuation (Weighted- December 31, 2015 Value Technique(s) Unobservable Input(s) Average) Impaired loans: Commercial real estate $ 1,383 Sales comparison approach Appraisal discounts 20 % Other real estate owned: Construction and land development 216 Sales comparison approach Appraisal discounts 15 %
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, 2016 and December 31, 2015 were as follows (in thousands): September 30, 2016 December 31, 2015 Carrying Carrying amount Fair value amount Fair value Financial assets: Cash and due from banks, interest-bearing deposits in financial institutions $ 73,256 $ 73,256 $ 93,455 $ 93,455 Federal funds sold 195 195 6,730 6,730 Securities available for sale 167,213 167,213 173,383 173,383 Securities held to maturity 46,228 50,665 43,094 46,459 Loans held for sale 61,252 62,620 35,729 36,552 Restricted equity securities 5,526 N/A 5,414 N/A Loans, net 924,031 927,333 798,264 806,030 Accrued interest receivable 3,813 3,813 3,030 3,030 Bank owned life insurance 21,750 21,750 21,299 21,299 Other assets 1,215 1,215 726 726 Financial liabilities: Deposits 1,136,060 1,112,683 1,038,460 1,035,978 Securities sold under repurchase agreements — — 3,755 3,755 Federal Home Loan Bank advances 30,000 29,985 45,000 44,926 Accrued interest payable 202 202 177 177 Other liabilities 8,713 8,713 6,536 6,536

Summary of Significant Accoun31

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	Sep. 27, 2016	Sep. 30, 2016
Summary Of Significant Accounting Policies [Line Items]
Date of acquisition		Feb. 5, 2016
Common Stock
Summary Of Significant Accounting Policies [Line Items]
Issuance of common stock, shares		1,688,049
Exercise of common stock warrants, shares		87,666
Initial Public Offering | Common Stock
Summary Of Significant Accounting Policies [Line Items]
Issuance of common stock, shares	2,972,750
Net proceeds from issuance	$ 21,900,000
Initial Public Offering by the Company | Common Stock
Summary Of Significant Accounting Policies [Line Items]
Issuance of common stock, shares	1,688,049
Initial Public Offering by certain selling shareholders | Common Stock
Summary Of Significant Accounting Policies [Line Items]
Issuance of common stock, shares	1,284,701
Preferred shares converted to common stock	731,707
Cashless exercise	79,166
Exercise of common stock warrants, shares	250,000
Net proceeds from issuance	$ 0

Securities - Summary of Fair Va

Securities - Summary of Fair Value of Available for Sale Held to Maturity (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Securities available for sale [Abstract]
Amortized Cost	$ 167,102,000	$ 175,980,000
Gross unrealized gains	1,651,000	128,000
Gross unrealized (losses)	(1,540,000)	(2,725,000)
Securities available for sale, at fair value	167,213,109	173,382,957
Securities held to maturity [Abstract]
Amortized Cost	46,228,000	43,094,000
Gross unrealized gains	4,437,000	3,365,000
Estimated fair value	50,664,931	46,458,841
U. S. government agency securities
Securities available for sale [Abstract]
Amortized Cost	7,529,000	19,562,000
Gross unrealized gains	79,000	16,000
Gross unrealized (losses)	(1,000)	(36,000)
Securities available for sale, at fair value	7,607,000	19,542,000
State and municipal securities
Securities available for sale [Abstract]
Amortized Cost	20,072,000	13,776,000
Gross unrealized gains	499,000	99,000
Gross unrealized (losses)	(72,000)	(7,000)
Securities available for sale, at fair value	20,499,000	13,868,000
Securities held to maturity [Abstract]
Amortized Cost	36,819,000	37,005,000
Gross unrealized gains	4,144,000	3,245,000
Estimated fair value	40,963,000	40,250,000
Mortgage-backed securities
Securities available for sale [Abstract]
Amortized Cost	117,542,000	119,828,000
Gross unrealized gains	1,073,000	13,000
Gross unrealized (losses)	(188,000)	(1,461,000)
Securities available for sale, at fair value	118,427,000	118,380,000
Securities held to maturity [Abstract]
Amortized Cost	5,109,000	6,089,000
Gross unrealized gains	258,000	120,000
Estimated fair value	5,367,000	6,209,000
Asset-backed securities
Securities available for sale [Abstract]
Amortized Cost	21,959,000	22,814,000
Gross unrealized (losses)	(1,279,000)	(1,221,000)
Securities available for sale, at fair value	20,680,000	$ 21,593,000
Other debt securities
Securities held to maturity [Abstract]
Amortized Cost	4,300,000
Gross unrealized gains	35,000
Estimated fair value	$ 4,335,000

Securities - Summary of Securit

Securities - Summary of Securities with Unrealized Losses and Length of Time Continuous Loss Positions (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	$ 31,651	$ 113,353
Less than 12 months, Gross unrealized (losses)	(196)	(1,111)
12 months or more, Estimated fair value	25,302	37,853
12 months or more, Gross unrealized losses	(1,344)	(1,614)
Total, Estimated fair value	56,953	151,206
Total, Gross unrealized losses	(1,540)	(2,725)
U. S. government agency securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	2,014	13,100
Less than 12 months, Gross unrealized (losses)	(1)	(36)
Total, Estimated fair value	2,014	13,100
Total, Gross unrealized losses	(1)	(36)
State and municipal securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	5,980	3,099
Less than 12 months, Gross unrealized (losses)	(72)	(7)
Total, Estimated fair value	5,980	3,099
Total, Gross unrealized losses	(72)	(7)
Mortgage-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
Less than 12 months, Estimated fair value	23,657	97,154
Less than 12 months, Gross unrealized (losses)	(123)	(1,068)
12 months or more, Estimated fair value	4,622	16,260
12 months or more, Gross unrealized losses	(65)	(393)
Total, Estimated fair value	28,279	113,414
Total, Gross unrealized losses	(188)	(1,461)
Asset-backed securities
Available-for-sale securities, continuous unrealized loss position [Abstract]
12 months or more, Estimated fair value	20,680	21,593
12 months or more, Gross unrealized losses	(1,279)	(1,221)
Total, Estimated fair value	20,680	21,593
Total, Gross unrealized losses	$ (1,279)	$ (1,221)

Securities - Additional Informa

Securities - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
Schedule Of Available For Sale Securities [Line Items]
Unrealized losses in investment securities portfolio	$ 1.5
Public Deposits, Derivative Positions and Federal Home Loan Bank Advances
Schedule Of Available For Sale Securities [Line Items]
Carrying value of securities	$ 134.2

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Fair Value of Debt and Equity Securities by Contractual Maturity (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale, Amortized cost [Abstract]
Due one to five years	$ 9,717,000
Due five to ten years	17,360,000
Due beyond ten years	524,000
Mortgage-backed securities	117,542,000
Asset-backed securities	21,959,000
Amortized cost	167,102,000
Available-for-sale, Estimated fair value [Abstract]
Due one to five years	9,816,000
Due five to ten years	17,773,000
Due beyond ten years	517,000
Mortgage-backed securities	118,427,000
Asset-backed securities	20,680,000
Estimated fair value	167,213,000
Held-to-maturity, Amortized cost [Abstract]
Due one to five years	23,341,000
Due five to ten years	16,657,000
Due beyond ten years	1,121,000
Mortgage-backed securities	5,109,000
Amortized Cost	46,228,000	$ 43,094,000
Securities held to maturity [Abstract]
Due one to five years	25,425,000
Due five to ten years	18,582,000
Due beyond ten years	1,291,000
Mortgage-backed securities	5,367,000
Estimated fair value	$ 50,664,931	$ 46,458,841

Loans and Allowance for Loan 36

Loans and Allowance for Loan And Lease Losses - Summary of Loan Portfolio (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans And Leases Receivable Disclosure [Line Items]
Total loans	$ 925,401,000	$ 809,811,000
Less net unearned income	(1,370,000)	(1,415,000)
Loans and leases , net of unearned income	924,030,515	808,396,064
Less allowance for loan and lease losses	(11,510,464)	(10,131,729)	$ (11,282,000)
Loans, net	912,520,051	798,264,335
Commercial real estate
Loans And Leases Receivable Disclosure [Line Items]
Total loans	272,546,000	251,197,000
Less allowance for loan and lease losses	(2,420,000)	(2,879,000)	(1,535,000)
Consumer real estate
Loans And Leases Receivable Disclosure [Line Items]
Total loans	96,919,000	93,785,000
Less allowance for loan and lease losses	(972,000)	(968,000)	(621,000)
Construction and land development
Loans And Leases Receivable Disclosure [Line Items]
Total loans	91,366,000	52,522,000
Less allowance for loan and lease losses	(1,664,000)	(914,000)	(408,000)
Commercial and industrial
Loans And Leases Receivable Disclosure [Line Items]
Total loans	389,718,000	353,442,000
Less allowance for loan and lease losses	(5,568,000)	(4,693,000)	(8,540,000)
Consumer
Loans And Leases Receivable Disclosure [Line Items]
Total loans	7,046,000	8,668,000
Less allowance for loan and lease losses	(86,000)	(103,000)	(75,000)
Other
Loans And Leases Receivable Disclosure [Line Items]
Total loans	67,806,000	50,197,000
Less allowance for loan and lease losses	$ (800,000)	$ (575,000)	$ (103,000)

Loans and Allowance for Loan 37

Loans and Allowance for Loan And Lease Losses - Summary of Loan Balances by Category as well as Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 925,401	$ 809,811
Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	4,123	2,677
Performing Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	921,278	807,134
Performing Loans | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	895,907	791,798
Performing Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	8,691	6,230
Performing Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	16,680	9,106
Commercial real estate
Financing Receivable Recorded Investment [Line Items]
Total loans	272,546	251,197
Commercial real estate | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	1,327	1,948
Commercial real estate | Performing Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	271,219	249,249
Commercial real estate | Performing Loans | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	271,219	249,249
Consumer real estate
Financing Receivable Recorded Investment [Line Items]
Total loans	96,919	93,785
Consumer real estate | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans		604
Consumer real estate | Performing Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	96,919	93,181
Consumer real estate | Performing Loans | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	96,624	93,181
Consumer real estate | Performing Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	295
Construction and land development
Financing Receivable Recorded Investment [Line Items]
Total loans	91,366	52,522
Construction and land development | Performing Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	91,366	52,522
Construction and land development | Performing Loans | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	91,366	52,522
Commercial and industrial
Financing Receivable Recorded Investment [Line Items]
Total loans	389,718	353,442
Commercial and industrial | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	2,796
Commercial and industrial | Performing Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	386,922	353,442
Commercial and industrial | Performing Loans | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	361,863	338,106
Commercial and industrial | Performing Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	8,691	6,230
Commercial and industrial | Performing Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	16,368	9,106
Consumer
Financing Receivable Recorded Investment [Line Items]
Total loans	7,046	8,668
Consumer | Total Impaired Loans
Financing Receivable Recorded Investment [Line Items]
Total loans		125
Consumer | Performing Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	7,046	8,543
Consumer | Performing Loans | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	7,029	8,543
Consumer | Performing Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	17
Other
Financing Receivable Recorded Investment [Line Items]
Total loans	67,806	50,197
Other | Performing Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	67,806	50,197
Other | Performing Loans | Pass/Watch
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 67,806	$ 50,197

Loans and Allowance for Loan 38

Loans and Allowance for Loan And Lease Losses - Additional Information (Detail) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Loans And Leases Receivable Disclosure [Line Items]
Total loans	$ 925,401,000		$ 809,811,000
Loans past due not on nonaccrual status	0		0
Investment in TDR	1,300,000		100,000
Specific allowance related to loans	601,000		565,000
Additional commitments related to TDR	0
Allowance for loan and lease losses, charge-off	$ 1,452,000		3,206,000
Loan period considered as payment default	30 days
Consumer
Loans And Leases Receivable Disclosure [Line Items]
Total loans	$ 7,046,000		8,668,000
Allowance for loan and lease losses, specific reserve	0
Allowance for loan and lease losses, charge-off	146,000
Subsequent default TDR charge-off	100,000
Commercial and industrial
Loans And Leases Receivable Disclosure [Line Items]
Total loans	389,718,000		353,442,000
Specific allowance related to loans	500,000
Allowance for loan and lease losses, specific reserve		$ 2,400,000
Allowance for loan and lease losses, charge-off	956,000		3,033,000
Subsequent default TDR charge-off		$ 2,500,000
Troubled Debt Restructurings
Loans And Leases Receivable Disclosure [Line Items]
Specific allowance related to loans	100,000		0
Doubtful
Loans And Leases Receivable Disclosure [Line Items]
Total loans	$ 0		$ 0

Loans and Allowance for Loan 39

Loans and Allowance for Loan and Lease Losses - Summary of Changes in Allowance for Loan Losses by Loan Classification (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Allowance for Loan and Lease Losses:
Beginning Balance			$ 10,131,729	$ 11,282,000	$ 11,282,000
Charged-off loans			(1,452,000)		(3,206,000)
Recoveries			71,000		405,000
Provision for loan and lease losses	$ 1,638,669	$ 580,000	2,758,749	1,300,675	1,651,000
Ending Balance	11,510,464		11,510,464		10,131,729
Collectively evaluated for impairment	10,909,000		10,909,000		9,567,000
Individually evaluated for impairment	601,000		601,000		565,000
Loans acquired with deteriorated credit quality	0		0
Loans:
Collectively evaluated for impairment	921,278,000		921,278,000		807,134,000
Individually evaluated for impairment	4,123,000		4,123,000		2,677,000
Loans acquired with deteriorated credit quality	0		0
Ending Balance	925,401,000		925,401,000		809,811,000
Commercial real estate
Allowance for Loan and Lease Losses:
Beginning Balance			2,879,000	1,535,000	1,535,000
Charged-off loans			(350,000)
Recoveries			52,000		31,000
Provision for loan and lease losses			(161,000)		1,313,000
Ending Balance	2,420,000		2,420,000		2,879,000
Collectively evaluated for impairment	2,319,000		2,319,000		2,314,000
Individually evaluated for impairment	101,000		101,000		565,000
Loans acquired with deteriorated credit quality	0		0
Loans:
Collectively evaluated for impairment	271,219,000		271,219,000		249,249,000
Individually evaluated for impairment	1,327,000		1,327,000		1,948,000
Loans acquired with deteriorated credit quality	0		0
Ending Balance	272,546,000		272,546,000		251,197,000
Consumer real estate
Allowance for Loan and Lease Losses:
Beginning Balance			968,000	621,000	621,000
Charged-off loans					(173,000)
Recoveries					68,000
Provision for loan and lease losses			4,000		452,000
Ending Balance	972,000		972,000		968,000
Collectively evaluated for impairment	972,000		972,000		968,000
Individually evaluated for impairment	0		0
Loans acquired with deteriorated credit quality	0		0
Loans:
Collectively evaluated for impairment	96,919,000		96,919,000		93,181,000
Individually evaluated for impairment					604,000
Loans acquired with deteriorated credit quality	0		0
Ending Balance	96,919,000		96,919,000		93,785,000
Construction and land development
Allowance for Loan and Lease Losses:
Beginning Balance			914,000	408,000	408,000
Recoveries			18,000
Provision for loan and lease losses			732,000		506,000
Ending Balance	1,664,000		1,664,000		914,000
Collectively evaluated for impairment	1,664,000		1,664,000		914,000
Individually evaluated for impairment	0		0
Loans acquired with deteriorated credit quality	0		0
Loans:
Collectively evaluated for impairment	91,366,000		91,366,000		52,522,000
Loans acquired with deteriorated credit quality	0		0
Ending Balance	91,366,000		91,366,000		52,522,000
Commercial and industrial
Allowance for Loan and Lease Losses:
Beginning Balance			4,693,000	8,540,000	8,540,000
Charged-off loans			(956,000)		(3,033,000)
Recoveries					299,000
Provision for loan and lease losses			1,831,000		(1,113,000)
Ending Balance	5,568,000		5,568,000		4,693,000
Collectively evaluated for impairment	5,068,000		5,068,000		4,693,000
Individually evaluated for impairment	500,000		500,000
Loans acquired with deteriorated credit quality	0		0
Loans:
Collectively evaluated for impairment	386,922,000		386,922,000		353,442,000
Individually evaluated for impairment	2,796,000		2,796,000
Loans acquired with deteriorated credit quality	0		0
Ending Balance	389,718,000		389,718,000		353,442,000
Consumer
Allowance for Loan and Lease Losses:
Beginning Balance			103,000	75,000	75,000
Charged-off loans			(146,000)
Recoveries			1,000		7,000
Provision for loan and lease losses			128,000		21,000
Ending Balance	86,000		86,000		103,000
Collectively evaluated for impairment	86,000		86,000		103,000
Individually evaluated for impairment	0		0
Loans acquired with deteriorated credit quality	0		0
Loans:
Collectively evaluated for impairment	7,046,000		7,046,000		8,543,000
Individually evaluated for impairment					125,000
Loans acquired with deteriorated credit quality	0		0
Ending Balance	7,046,000		7,046,000		8,668,000
Other
Allowance for Loan and Lease Losses:
Beginning Balance			575,000	$ 103,000	103,000
Provision for loan and lease losses			225,000		472,000
Ending Balance	800,000		800,000		575,000
Collectively evaluated for impairment	800,000		800,000		575,000
Individually evaluated for impairment	0		0
Loans acquired with deteriorated credit quality	0		0
Loans:
Collectively evaluated for impairment	67,806,000		67,806,000		50,197,000
Loans acquired with deteriorated credit quality	0		0
Ending Balance	$ 67,806,000		$ 67,806,000		50,197,000
Receivables Acquired with Deteriorated Credit Quality
Allowance for Loan and Lease Losses:
Loans acquired with deteriorated credit quality					0
Loans:
Loans acquired with deteriorated credit quality					0
Receivables Acquired with Deteriorated Credit Quality | Commercial real estate
Allowance for Loan and Lease Losses:
Loans acquired with deteriorated credit quality					0
Loans:
Loans acquired with deteriorated credit quality					0
Receivables Acquired with Deteriorated Credit Quality | Consumer real estate
Allowance for Loan and Lease Losses:
Loans acquired with deteriorated credit quality					0
Loans:
Loans acquired with deteriorated credit quality					0
Receivables Acquired with Deteriorated Credit Quality | Construction and land development
Allowance for Loan and Lease Losses:
Loans acquired with deteriorated credit quality					0
Loans:
Loans acquired with deteriorated credit quality					0
Receivables Acquired with Deteriorated Credit Quality | Commercial and industrial
Allowance for Loan and Lease Losses:
Loans acquired with deteriorated credit quality					0
Loans:
Loans acquired with deteriorated credit quality					0
Receivables Acquired with Deteriorated Credit Quality | Consumer
Allowance for Loan and Lease Losses:
Loans acquired with deteriorated credit quality					0
Loans:
Loans acquired with deteriorated credit quality					0
Receivables Acquired with Deteriorated Credit Quality | Other
Allowance for Loan and Lease Losses:
Loans acquired with deteriorated credit quality					0
Loans:
Loans acquired with deteriorated credit quality					$ 0

Loans and Allowance for Loan 40

Loans and Allowance for Loan and Lease Losses - Allocation of ALLL with Corresponding Percentage of Loans in Each Category to Total Loans, Net of Deferred Fee (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan and lease losses, Amount	$ 11,510,464	$ 10,131,729	$ 11,282,000
Allowance for loan and lease losses, Percentage of total loans, net of deferred fees	1.25%	1.25%
Commercial real estate
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan and lease losses, Amount	$ 2,420,000	$ 2,879,000	1,535,000
Allowance for loan and lease losses, Percentage of total loans, net of deferred fees	0.26%	0.36%
Consumer real estate
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan and lease losses, Amount	$ 972,000	$ 968,000	621,000
Allowance for loan and lease losses, Percentage of total loans, net of deferred fees	0.11%	0.12%
Construction and land development
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan and lease losses, Amount	$ 1,664,000	$ 914,000	408,000
Allowance for loan and lease losses, Percentage of total loans, net of deferred fees	0.18%	0.11%
Commercial and industrial
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan and lease losses, Amount	$ 5,568,000	$ 4,693,000	8,540,000
Allowance for loan and lease losses, Percentage of total loans, net of deferred fees	0.60%	0.58%
Consumer
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan and lease losses, Amount	$ 86,000	$ 103,000	75,000
Allowance for loan and lease losses, Percentage of total loans, net of deferred fees	0.01%	0.01%
Other
Loans And Leases Receivable Disclosure [Line Items]
Allowance for loan and lease losses, Amount	$ 800,000	$ 575,000	$ 103,000
Allowance for loan and lease losses, Percentage of total loans, net of deferred fees	0.09%	0.07%

Loans and Allowance for Loan 41

Loans and Allowance for Loan and Lease Losses - Summary of Impaired Loans Evaluated for Specific Loss Allowance (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment		$ 729
Impaired loans with no related allowance recorded, Unpaid principal balance		806
Impaired loans with an allowance recorded, Related allowance	$ 601	565
Impaired loans with no related allowance recorded, Average recorded investment	365	1,056
Impaired loans with no related allowance recorded, Interest income recognized		5
Impaired loans with an allowance recorded, Recorded investment	4,123	1,948
Impaired loans with an allowance recorded, Unpaid principal balance	5,180	1,948
Impaired loans with an allowance recorded, Average recorded investment	3,036	4,154
Recorded investment	4,123	2,677
Unpaid principal balance	5,180	2,754
Average recorded investment	3,400	5,210
Interest income recognized		5
Commercial real estate
Financing Receivable Impaired [Line Items]
Impaired loans with an allowance recorded, Related allowance	101	565
Impaired loans with no related allowance recorded, Average recorded investment		42
Impaired loans with an allowance recorded, Recorded investment	1,327	1,948
Impaired loans with an allowance recorded, Unpaid principal balance	1,689	1,948
Impaired loans with an allowance recorded, Average recorded investment	1,638	2,015
Consumer real estate
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment		604
Impaired loans with no related allowance recorded, Unpaid principal balance		681
Impaired loans with no related allowance recorded, Average recorded investment	302	357
Impaired loans with an allowance recorded, Average recorded investment		262
Construction and land development
Financing Receivable Impaired [Line Items]
Impaired loans with an allowance recorded, Average recorded investment		568
Commercial and industrial
Financing Receivable Impaired [Line Items]
Impaired loans with an allowance recorded, Related allowance	500
Impaired loans with no related allowance recorded, Average recorded investment		594
Impaired loans with an allowance recorded, Recorded investment	2,796
Impaired loans with an allowance recorded, Unpaid principal balance	3,491
Impaired loans with an allowance recorded, Average recorded investment	1,398	1,309
Consumer
Financing Receivable Impaired [Line Items]
Impaired loans with no related allowance recorded, Recorded investment		125
Impaired loans with no related allowance recorded, Unpaid principal balance		125
Impaired loans with no related allowance recorded, Average recorded investment	$ 63	63
Impaired loans with no related allowance recorded, Interest income recognized		$ 5

Loans and Allowance for Loan 42

Loans and Allowance for Loan and Lease Losses - Schedule of Aging of Recorded Investment in Past-due Loans, by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 897	$ 2,843
Loans Not Past Due	924,504	806,968
Total	925,401	809,811
Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,948
Loans Not Past Due	272,546	249,249
Total	272,546	251,197
Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	295	770
Loans Not Past Due	96,624	93,015
Total	96,919	93,785
Construction and land development
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	91,366	52,522
Total	91,366	52,522
Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	591
Loans Not Past Due	389,127	353,442
Total	389,718	353,442
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	11	125
Loans Not Past Due	7,035	8,543
Total	7,046	8,668
Other
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	67,806	50,197
Total	67,806	50,197
30 - 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	22	100
30 - 59 Days Past Due [Member] | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	11	100
30 - 59 Days Past Due [Member] | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	11
60 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	875	54
60 - 89 Days Past Due [Member] | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	284	54
60 - 89 Days Past Due [Member] | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 591
Greater than 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2,689
Greater than 89 Days Past Due [Member] | Commercial real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,948
Greater than 89 Days Past Due [Member] | Consumer real estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		616
Greater than 89 Days Past Due [Member] | Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 125

Loans and Allowance for Loan 43

Loans and Allowance for Loan and Lease Losses - Schedule of Non-Accrual Loans and Troubled Debt Restructurings (TDR) by Class of Loans (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	$ 4,123	$ 2,689
Troubled Debt Restructurings	1,288	125
Commercial real estate
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	1,327	1,948
Troubled Debt Restructurings	1,288
Consumer real estate
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	0	616
Commercial and industrial
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual	$ 2,796
Consumer
Accounts Notes And Loans Receivable [Line Items]
Non-Accrual		125
Troubled Debt Restructurings		$ 125

Loans and Allowance for Loan 44

Loans and Allowance for Loan And Lease Losses - Schedule of Presents Loans by Class Modified as TDR (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)Contract	Sep. 30, 2015USD ($)Contract
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	1	1
Pre modification outstanding recorded investment	$ 1,948	$ 125
Post modification outstanding recorded investment, net of related allowance	$ 1,170	$ 125
Commercial real estate
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	1
Pre modification outstanding recorded investment	$ 1,948
Post modification outstanding recorded investment, net of related allowance	$ 1,170
Consumer
Financing Receivable Modifications [Line Items]
Number of contracts | Contract		1
Pre modification outstanding recorded investment		$ 125
Post modification outstanding recorded investment, net of related allowance		$ 125

Loans and Allowance for Loan 45

Loans and Allowance for Loan and Lease Losses - Schedule of Loans by Class Modified as TDR for the Payment Default Within Twelve Months(Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015Contract
Financing Receivable Modifications [Line Items]
Number of contracts	1	1
Recorded investment	$ 124
Commercial and industrial
Financing Receivable Modifications [Line Items]
Number of contracts | Contract		1
Consumer
Financing Receivable Modifications [Line Items]
Number of contracts	1
Recorded investment	$ 124

Federal Home Loan Bank Advanc46

Federal Home Loan Bank Advances - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Federal Home Loan Bank Advances [Line Items]
Outstanding borrowings	$ 30	$ 45
Investment securities, FHLB stock and commercial and residential real estate mortgage loans
Federal Home Loan Bank Advances [Line Items]
Mortgage loans collateralized amount	101.3
Amount of available credit	$ 11

Federal Home Loan Bank Advanc47

Federal Home Loan Bank Advances - Summary of Contractual Maturities and Average Effective Rates of Outstanding Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Federal Home Loan Bank Advances Maturities Summary [Abstract]
2,016	$ 15,000	$ 45,000
2,017	15,000
Total amount	$ 30,000	$ 45,000
2,016	1.02%	0.57%
2,017	0.92%
Total interest rates	0.97%	0.57%

Accumulated Other Comprehensi48

Accumulated Other Comprehensive Income (Loss) - Summary of Changes In Accumulated Other Comprehensive Income (Loss) By Component, Net of Tax (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			$ 108,586,107	$ 102,651,373	$ 102,651,373
Other comprehensive income (loss) before reclassification			1,087,000		(1,988,000)
Amounts reclassified from accumulated other comprehensive income			(163,000)		(92,000)
Other comprehensive income (loss)	$ (289,554)	$ (312,212)	923,773	(717,081)	(2,080,000)
Ending balance	138,426,501	107,705,388	138,426,501	107,705,388	108,586,107
Gains and Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(3,704,000)	(2,139,000)	(2,139,000)
Other comprehensive income (loss) before reclassification			(664,000)		(1,542,000)
Amounts reclassified from accumulated other comprehensive income			(161,000)		(23,000)
Other comprehensive income (loss)			(825,000)		(1,565,000)
Ending balance	(4,529,000)		(4,529,000)		(3,704,000)
Unrealized Gains and Losses on Available for Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			105,000	723,000	723,000
Other comprehensive income (loss) before reclassification			1,596,000		(652,000)
Amounts reclassified from accumulated other comprehensive income			75,000		34,000
Other comprehensive income (loss)			1,671,000		(618,000)
Ending balance	1,776,000		1,776,000		105,000
Unrealized Losses on Securities Transferred to Held to Maturity
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(1,315,000)	(1,418,000)	(1,418,000)
Other comprehensive income (loss) before reclassification			154,000		206,000
Amounts reclassified from accumulated other comprehensive income			(77,000)		(103,000)
Other comprehensive income (loss)			77,000		103,000
Ending balance	(1,238,000)		(1,238,000)		(1,315,000)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(4,914,380)	(2,833,389)	(2,833,389)
Other comprehensive income (loss)			923,773	(717,081)
Ending balance	$ (3,990,607)	$ (3,550,470)	$ (3,990,607)	$ (3,550,470)	$ (4,914,380)

Accumulated Other Comprehensi49

Accumulated Other Comprehensive Income (Loss) - Summary of Significant Amounts Reclassified out off Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Net gain on sale of securities	$ (3,964)	$ 38,673	$ 120,873	$ 95,584
Interest expense - Federal Home Loan Bank advances	(96,838)	(47,333)	(279,586)	(131,000)
Income tax (expense) benefit	(1,042,282)	(831,307)	(2,997,965)	(2,480,231)
Net income	$ 2,109,222	$ 2,036,467	6,169,318	$ 5,466,469
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			(113,000)		$ (37,000)
Interest expense - Federal Home Loan Bank advances			(148,000)
Income tax (expense) benefit			100,000		14,000
Net income			(161,000)		(23,000)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains and Losses on Available for Sale Securities
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Net gain on sale of securities			121,000		55,000
Income tax (expense) benefit			(46,000)		(21,000)
Net income			75,000		34,000
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			(125,000)		(167,000)
Income tax (expense) benefit			48,000		64,000
Net income			$ (77,000)		$ (103,000)

Income Taxes Additional Informa

Income Taxes Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Taxes [Line Items]
Effective tax rate	33.10%	29.00%	32.70%	31.20%
Federal statutory income tax rate			34.00%	34.00%
Tennessee
Income Taxes [Line Items]
Excise tax rate			6.50%	6.50%

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Financial Instruments Representing Credit Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Unused commitments to extend credit	$ 482,257	$ 384,837
Standby letters of credit	10,658	13,450
Total	$ 492,915	$ 398,287

Derivatives - Additional Inform

Derivatives - Additional Information (Details) - Designated as Hedging Instrument - Interest Rate Swaps - Cash Flow Hedges - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional amounts	$ 35,000,000	$ 35,000,000
Investment securities pledged collateral to counterparties	7,200,000
Investment securities pledged collateral from counterparties	$ 0

Derivatives - Summary of Intere

Derivatives - Summary of Interest-Rate Swaps Designated as Cash Flow Hedges (Details) - Designated as Hedging Instrument - Cash Flow Hedges - Interest Rate Swaps - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional amounts	$ 35,000,000	$ 35,000,000
Weighted average pay rates	3.67%	3.67%
Weighted average receive rates	Sep. 30, 2016: 3 month LIBOR and Dec. 31, 2015: 3 month LIBOR
Weighted average maturity	6 years 7 months 6 days	7 years 4 months 24 days
Fair value	$ (4,918,000)	$ (3,158,000)
Amount of unrealized loss recognized in accumulated other comprehensive income, net of tax	$ (3,035,000)	$ (1,949,000)

Derivatives - Summary of Custom

Derivatives - Summary of Customer Related Interest Rate Swaps (Details) - Interest Rate Swaps - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Interest rate swap, Notional amount	$ 85,160,000	$ 91,350,000
Pay fixed/receive variable swaps
Derivative [Line Items]
Interest rate swap, Notional amount	42,580,000	45,675,000
Interest rate swap, Estimated fair value	1,215,000	(726,000)
Pay variable/receive fixed swaps
Derivative [Line Items]
Interest rate swap, Notional amount	42,580,000	45,675,000
Interest rate swap, Estimated fair value	$ (1,215,000)	$ 726,000

Stock Options and Restricted 55

Stock Options and Restricted Shares - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 1.7
Total fair value of shares vested	$ 0.5	$ 0.2
Vesting period	3 years
Contractual term	10 years
Expected dividend yield	0.00%
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	2 years 2 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 9 months 18 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	183,736

Stock Options and Restricted 56

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based compensation expense before income taxes	$ 212	$ 116	$ 643	$ 289
Less: deferred tax benefit	(70)	(34)	(210)	(90)
Reduction of net income	$ 142	$ 83	$ 433	$ 199

Stock Options and Restricted 57

Stock Options and Restricted Shares - Summary of Changes in Company's Nonvested Restricted Shares (Details)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Restricted Shares, Abstract
Restricted Shares, Nonvested Beginning Balance | shares	138,453
Restricted Shares, Granted | shares	122,551
Restricted Shares, Vested | shares	(37,096)
Restricted Shares, Forfeited | shares	(14,767)
Restricted Shares, Nonvested Ending Balance | shares	209,141
Weighted Average Grant Date Fair Value, Abstract
Weighted Average Grant Date Fair Value, Nonvested Beginning Balance | $ / shares	$ 11.16
Weighted Average Grant Date Fair Value, Granted | $ / shares	12.69
Weighted Average Grant Date Fair Value, Vested | $ / shares	10.38
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	11.84
Weighted Average Grant Date Fair Value, Nonvested Ending Balance | $ / shares	$ 12.15

Stock Options and Restricted 58

Stock Options and Restricted Shares - Summary of Fair Value of Options Granted Using Weighted Average Assumptions (Details)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected dividend yield	0.00%
Expected term (in years)	7 years 5 months 23 days	7 years 3 months 15 days
Expected stock price volatility	17.20%	21.26%
Risk-free interest rate	1.66%	1.86%
Pre-vest forfeiture rate	10.25%	10.33%

Stock Options and Restricted 59

Stock Options and Restricted Shares - Summary of Activity in Stock Options (Details)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Shares, Abstract
Shares Outstanding, Beginning Balance | shares	1,018,500
Shares Outstanding, Granted | shares	32,500
Shares Outstanding, Forfeited or Expired | shares	(21,875)
Shares Outstanding, Ending Balance | shares	1,029,125
Shares, Fully Vested and Expected to Vest | shares	1,015,297
Shares, Exercisable at End of Period | shares	912,875
Weighted Average Exercise Price, Abstract
Weighted Average Exercise Price Outstanding, Beginning Balance | $ / shares	$ 10.42
Weighted Average Exercise Price Outstanding, Granted | $ / shares	13.22
Weighted Average Exercise Price Outstanding, Forfeited or expired | $ / shares	10.18
Weighted Average Exercise Price Outstanding, Ending Balance | $ / shares	10.51
Weighted Average Exercise Price Outstanding, Fully vested and expected to vest | $ / shares	10.49
Weighted Average Exercise Price Outstanding, Shares, Exercisable at End of Period | $ / shares	$ 10.31
Weighted Average Remaining Contractual Term (year), Abstract
Weighted Average Remaining Contractual Term Outstanding	3 years 6 months
Weighted Average Remaining Contractual Term, Fully Vested and Expected to Vest	3 years 4 months 24 days
Weighted Average Remaining Contractual Term, Exercisable at End of Period	2 years 10 months 24 days

Stock Options and Restricted 60

Stock Options and Restricted Shares - Information Related to Stock Options (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Intrinsic value of options exercised		$ 1,410
Cash received from option exercises		10,000
Tax benefit realized from option exercises		$ 900
Weighted average fair value of options granted	$ 3.16	$ 3.20

Regulatory Capital Requiremen61

Regulatory Capital Requirements - Schedule of Capital Amounts and Ratios (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital to risk-weighted assets, actual amount			$ 116,047
Tier I capital to risk-weighted assets, actual amount			105,749
Tier I capital to average assets, actual amount			$ 105,749
Total capital to risk-weighted assets, actual ratio			11.40%
Tier I capital to risk-weighted assets, actual ratio			10.40%
Tier I capital to average assets, actual ratio			9.30%
Total capital to risk-weighted assets, minimum capital requirement amount	[1]		$ 81,224
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]		60,918
Tier I capital to average assets, minimum capital requirement amount	[1]		$ 45,328
Total capital to risk-weighted assets, minimum capital requirement ratio	[1]		8.00%
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]		6.00%
Tier I capital to average assets, minimum capital requirement ratio	[1]		4.00%
Total capital to risk-weighted assets, minimum to be well capitalized amount	[2]		$ 101,530
Tier I capital to risk-weighted assets, minimum to be well capitalized amount	[2]		81,224
Tier I capital to average assets, minimum to be well capitalized amount	[2]		$ 56,660
Total capital to risk-weighted assets, minimum to be well capitalized ratio	[2]		10.00%
Tier I capital to risk-weighted assets, minimum to be well capitalized ratio	[2]		8.00%
Tier I capital to average assets, minimum to be well capitalized ratio	[2]		5.00%
Common Stock
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier I capital to risk-weighted assets, actual amount			$ 90,272
Tier I capital to risk-weighted assets, actual ratio			8.90%
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]		$ 45,688
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]		4.50%
Tier I capital to risk-weighted assets, minimum to be well capitalized amount	[2]		$ 65,994
Tier I capital to risk-weighted assets, minimum to be well capitalized ratio	[2]		6.50%
CapStar Financial Holdings, Inc.
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital to risk-weighted assets, actual amount		$ 146,576
Tier I capital to risk-weighted assets, actual amount		134,900
Tier I capital to average assets, actual amount		$ 134,900
Total capital to risk-weighted assets, actual ratio		12.50%
Tier I capital to risk-weighted assets, actual ratio		11.50%
Tier I capital to average assets, actual ratio		10.50%
Total capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 94,163
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	70,623
Tier I capital to average assets, minimum capital requirement amount	[1]	$ 51,562
Total capital to risk-weighted assets, minimum capital requirement ratio	[1]	8.00%
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	6.00%
Tier I capital to average assets, minimum capital requirement ratio	[1]	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		$ 126,531
Tier I capital to risk-weighted assets, actual ratio		10.70%
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 52,967
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	4.50%
CapStar Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total capital to risk-weighted assets, actual amount		$ 123,228
Tier I capital to risk-weighted assets, actual amount		111,552
Tier I capital to average assets, actual amount		$ 111,552
Total capital to risk-weighted assets, actual ratio		10.50%
Tier I capital to risk-weighted assets, actual ratio		9.50%
Tier I capital to average assets, actual ratio		8.70%
Total capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 94,163
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	70,623
Tier I capital to average assets, minimum capital requirement amount	[1]	$ 51,543
Total capital to risk-weighted assets, minimum capital requirement ratio	[1]	8.00%
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	6.00%
Tier I capital to average assets, minimum capital requirement ratio	[1]	4.00%
Total capital to risk-weighted assets, minimum to be well capitalized amount	[2]	$ 117,704
Tier I capital to risk-weighted assets, minimum to be well capitalized amount	[2]	94,163
Tier I capital to average assets, minimum to be well capitalized amount	[2]	$ 64,429
Total capital to risk-weighted assets, minimum to be well capitalized ratio	[2]	10.00%
Tier I capital to risk-weighted assets, minimum to be well capitalized ratio	[2]	8.00%
Tier I capital to average assets, minimum to be well capitalized ratio	[2]	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		$ 95,683
Tier I capital to risk-weighted assets, actual ratio		8.10%
Tier I capital to risk-weighted assets, minimum capital requirement amount	[1]	$ 52,967
Tier I capital to risk-weighted assets, minimum capital requirement ratio	[1]	4.50%
Tier I capital to risk-weighted assets, minimum to be well capitalized amount	[2]	$ 76,508
Tier I capital to risk-weighted assets, minimum to be well capitalized ratio	[2]	6.50%
[1]	For the calendar year 2016, 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 0.625% 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.

Regulatory Capital Requiremen62

Regulatory Capital Requirements - Schedule of Capital Amounts and Ratios (Parenthetical) (Details)	Sep. 30, 2016
Banking And Thrift [Abstract]
Minimum risk based capital ratios	0.625%

Earning Per Share - Summary of

Earning Per Share - Summary of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Basic net income per share calculation:
Numerator – Net income	$ 2,109,222	$ 2,036,467	$ 6,169,318	$ 5,466,469
Denominator – Average common shares outstanding	8,792,665	8,554,802	8,701,596	8,526,840
Basic net income per common share	$ 0.24	$ 0.24	$ 0.71	$ 0.64
Diluted net income per share calculation:
Numerator – Net income	$ 2,109,222	$ 2,036,467	$ 6,169,318	$ 5,466,469
Denominator – Average common shares outstanding	8,792,665	8,554,802	8,701,596	8,526,840
Dilutive shares contingently issuable	2,006,871	1,852,919	1,981,380	1,837,438
Average diluted common shares outstanding	10,799,536	10,407,721	10,682,976	10,364,278
Diluted net income per common share	$ 0.20	$ 0.20	$ 0.58	$ 0.53

Fair Value - Summary of Assets

Fair Value - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Assets:
Total securities available for sale	$ 167,213,109	$ 173,382,957
Obligations of States and Political Subdivisions
Assets:
Total securities available for sale	20,499,000	13,868,000
Asset-backed securities
Assets:
Total securities available for sale	20,680,000	21,593,000
Fair Value Measurements Recurring Basis
Assets:
Total securities available for sale	167,213,000	173,383,000
Liabilities:
Total derivatives	(6,133,000)	(3,884,000)
Fair Value Measurements Recurring Basis | U.S. Government-sponsored Agencies
Assets:
Total securities available for sale	7,607,000	19,542,000
Fair Value Measurements Recurring Basis | Obligations of States and Political Subdivisions
Assets:
Total securities available for sale	20,499,000	13,868,000
Fair Value Measurements Recurring Basis | Mortgage-backed Securities-residential
Assets:
Total securities available for sale	118,427,000	118,380,000
Fair Value Measurements Recurring Basis | Asset-backed securities
Assets:
Total securities available for sale	20,680,000	21,593,000
Fair Value Measurements Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Total securities available for sale		3,526,000
Fair Value Measurements Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Assets:
Total securities available for sale		3,526,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2)
Assets:
Total securities available for sale	167,213,000	169,857,000
Liabilities:
Total derivatives	(6,133,000)	(3,884,000)
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | U.S. Government-sponsored Agencies
Assets:
Total securities available for sale	7,607,000	19,542,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Obligations of States and Political Subdivisions
Assets:
Total securities available for sale	20,499,000	13,868,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed Securities-residential
Assets:
Total securities available for sale	118,427,000	118,380,000
Fair Value Measurements Recurring Basis | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Total securities available for sale	20,680,000	18,067,000
Fair Value Measurements Recurring Basis | Interest Rate Swaps - Customer Related
Assets:
Interest rate swaps - customer related	1,215,000	726,000
Liabilities:
Total derivatives	(1,215,000)	(726,000)
Fair Value Measurements Recurring Basis | Interest Rate Swaps - Customer Related | Significant Other Observable Inputs (Level 2)
Assets:
Interest rate swaps - customer related	1,215,000	726,000
Liabilities:
Total derivatives	(1,215,000)	(726,000)
Fair Value Measurements Recurring Basis | Interest Rate Swaps - Cash Flow Hedges
Liabilities:
Total derivatives	(4,918,000)	(3,158,000)
Fair Value Measurements Recurring Basis | Interest Rate Swaps - Cash Flow Hedges | Significant Other Observable Inputs (Level 2)
Liabilities:
Total derivatives	$ (4,918,000)	$ (3,158,000)

Fair Value - Summary of Asset65

Fair Value - Summary of Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Commercial Real Estate
Assets:
Impaired loans	$ 1,327	$ 1,383
Construction and land development
Assets:
Other real estate owned		216
Significant Unobservable Inputs (Level 3) | Commercial Real Estate
Assets:
Impaired loans	1,327	1,383
Significant Unobservable Inputs (Level 3) | Construction and land development
Assets:
Other real estate owned		$ 216
Commercial and industrial
Assets:
Impaired loans	2,796
Commercial and industrial | Significant Unobservable Inputs (Level 3)
Assets:
Impaired loans	$ 2,796

Fair Value - Summary of Quantit

Fair Value - Summary of Quantitative Information About Level 3 Fair Value Measurements for Assets Measured at Fair Value on a Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	$ 1,327	$ 1,383
Construction and land development
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other real estate owned		216
Commercial and industrial
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	2,796
Level 3 Fair Value Measurements | Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	$ 1,327	$ 1,383
Valuation Technique(s)	Sep. 30, 2016: Sales comparison approach and Dec. 31, 2015: Sales comparison approach
Unobservable Input(s)	Sep. 30, 2016: Appraisal discounts and Dec. 31, 2015: Appraisal discounts
Range (Weighted-Average)	10.00%	20.00%
Level 3 Fair Value Measurements | Construction and land development
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation Technique(s)	Dec. 31, 2015: Sales comparison approach
Unobservable Input(s)	Dec. 31, 2015: Appraisal discounts
Range (Weighted-Average)		15.00%
Other real estate owned		$ 216
Level 3 Fair Value Measurements | Commercial and industrial
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	$ 2,796
Valuation Technique(s)	Sep. 30, 2016: Sales comparison approach
Unobservable Input(s)	Sep. 30, 2016: Appraisal discounts
Range (Weighted-Average)	25.00%

Fair Value - Summary of Carryin

Fair Value - Summary of Carrying Value and Fair Values of the Bank's Financial Instruments (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Financial assets:
Securities available for sale	$ 167,213,109	$ 173,382,957
Securities held to maturity, fair value	50,664,931	46,458,841
Carrying amount
Financial assets:
Cash and due from banks, interest-bearing deposits in financial institutions	73,256,000	93,455,000
Federal funds sold	195,000	6,730,000
Securities available for sale	167,213,000	173,383,000
Securities held to maturity, fair value	46,228,000	43,094,000
Loans held for sale	61,252,000	35,729,000
Restricted equity securities	5,526,000	5,414,000
Loans, net	924,031,000	798,264,000
Accrued interest receivable	3,813,000	3,030,000
Bank owned life insurance	21,750,000	21,299,000
Other assets	1,215,000	726,000
Financial liabilities:
Deposits	1,136,060,000	1,038,460,000
Securities sold under repurchase agreements		3,755,000
Federal Home Loan Bank advances	30,000,000	45,000,000
Accrued interest payable	202,000	177,000
Other liabilities	8,713,000	6,536,000
Fair value
Financial assets:
Cash and due from banks, interest-bearing deposits in financial institutions	73,256,000	93,455,000
Federal funds sold	195,000	6,730,000
Securities available for sale	167,213,000	173,383,000
Securities held to maturity, fair value	50,665,000	46,459,000
Loans held for sale	62,620,000	36,552,000
Loans, net	927,333,000	806,030,000
Accrued interest receivable	3,813,000	3,030,000
Bank owned life insurance	21,750,000	21,299,000
Other assets	1,215,000	726,000
Financial liabilities:
Deposits	1,112,683,000	1,035,978,000
Securities sold under repurchase agreements		3,755,000
Federal Home Loan Bank advances	29,985,000	44,926,000
Accrued interest payable	202,000	177,000
Other liabilities	$ 8,713,000	$ 6,536,000