Franklin Financial Network (FSB) 10-Q 9 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 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	FSB
Entity Registrant Name	FRANKLIN FINANCIAL NETWORK INC.
Entity Central Index Key	1,407,067
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		10,758,458

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from financial institutions	$ 55,749	$ 52,394
Certificates of deposit at other financial institutions	1,055	250
Securities available for sale	670,756	575,838
Securities held to maturity (fair value 2016-$243,946 and 2015-$161,969)	235,050	158,200
Loans held for sale, at fair value	26,819	14,079
Loans	1,654,058	1,303,826
Allowance for loan losses	(15,590)	(11,587)
Net loans	1,638,468	1,292,239
Restricted equity securities, at cost	11,829	7,998
Premises and equipment, net	8,796	7,640
Accrued interest receivable	7,871	7,299
Bank owned life insurance	23,105	22,619
Deferred tax asset	5,590	9,430
Assets held for sale		1,640
Foreclosed assets	0	200
Servicing rights, net	3,566	3,455
Goodwill	9,124	9,124
Core deposit intangible, net	1,612	2,043
Other assets	3,805	3,344
Total assets	2,703,195	2,167,792
Deposits
Non-interest bearing	232,118	176,742
Interest bearing	1,985,836	1,637,297
Total deposits	2,217,954	1,814,039
Federal funds purchased and repurchase agreements	45,843	101,086
Federal Home Loan Bank advances	162,000	57,000
Subordinated notes, net of issuance costs	58,292
Accrued interest payable	1,399	644
Other liabilities	8,063	6,207
Total liabilities	2,493,551	1,978,976
Shareholders' equity
Preferred stock, no par value: 1,000,000 shares authorized; Senior non-cumulative preferred stock, Series A, no par value, $1,000 liquidation value per share, 10,000 shares authorized; no shares outstanding at September 30, 2016 and 10,000 shares issued and outstanding at December 31, 2015		10,000
Common stock, no par value; 20,000,000 shares authorized; 10,757,483 and 10,571,377 shares issued and outstanding at September 30, 2016 and December 31 2015, respectively	150,852	147,784
Retained earnings	51,591	31,352
Accumulated other comprehensive income (loss)	7,201	(320)
Total shareholders' equity	209,644	188,816
Total liabilities and shareholders' equity	$ 2,703,195	$ 2,167,792

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Held-to-maturity securities, fair value	$ 243,946	$ 161,969
Preferred stock, no par value
Preferred stock, shares authorized	1,000,000	1,000,000
Common stock, no par value
Common stock shares authorized	20,000,000	20,000,000
Common stock shares issued	10,757,483	10,571,377
Common stock, share outstanding	10,757,483	10,571,377
Series A [Member] | Senior Non-cumulative Preferred Stock [Member]
Preferred stock, no par value
Preferred stock, liquidation value, per share	$ 1,000	$ 1,000
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued		10,000
Preferred stock, shares outstanding	0	10,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income and dividends
Loans, including fees	$ 20,192	$ 14,744	$ 56,864	$ 38,071
Securities:
Taxable	3,889	3,462	11,402	9,084
Tax-exempt	1,457	966	3,776	1,155
Dividends on restricted equity securities	133	100	354	250
Federal funds sold and other	53	29	175	80
Total interest income	25,724	19,301	72,571	48,640
Interest expense
Deposits	3,683	2,417	10,118	5,963
Federal funds purchased and repurchase agreements	69	69	237	232
Federal Home Loan Bank advances	215	79	511	225
Subordinated notes and other borrowings	1,082		1,820
Total interest expense	5,049	2,565	12,686	6,420
Net interest income	20,675	16,736	59,885	42,220
Provision for loan losses	1,392	1,724	4,095	3,154
Net interest income after provision for loan losses	19,283	15,012	55,790	39,066
Noninterest income
Service charges on deposit accounts	44	44	139	78
Other service charges and fees	845	679	2,245	1,987
Net gains on sale of loans	2,942	2,463	6,859	5,573
Wealth management	446	327	1,343	914
Loan servicing fees, net	(40)	84	(2)	187
Gain on sale or call of securities	430	5	1,535	529
Net gain on sale of foreclosed assets	30	3	36	30
Other	179	193	432	566
Total noninterest income	4,876	3,798	12,587	9,864
Noninterest expense
Salaries and employee benefits	7,979	6,208	22,099	17,960
Occupancy and equipment	2,001	1,683	5,563	4,961
FDIC assessment expense	570	362	1,388	792
Marketing	206	277	611	695
Professional fees	935	516	3,006	1,382
Amortization of core deposit intangible	138	160	431	499
Indirect expenses related to public offering				314
Other	1,879	1,647	5,354	4,443
Total noninterest expense	13,708	10,853	38,452	31,046
Income before income tax expense	10,451	7,957	29,925	17,884
Income tax expense	3,421	2,807	9,663	6,468
Net income	7,030	5,150	20,262	11,416
Dividends paid on Series A preferred stock		(25)	(23)	(75)
Net income available to common shareholders	$ 7,030	$ 5,125	$ 20,239	$ 11,341
Earnings per share:
Basic	$ 0.66	$ 0.49	$ 1.90	$ 1.17
Diluted	$ 0.62	$ 0.46	$ 1.80	$ 1.12

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 7,030	$ 5,150	$ 20,262	$ 11,416
Unrealized gains (losses) on securities:
Unrealized holding gain (loss) arising during the period	(3,664)	7,871	13,910	4,006
Reclassification adjustment for gains included in net income	(430)	(5)	(1,535)	(529)
Net unrealized gains (losses)	(4,094)	7,866	12,375	3,477
Tax effect	1,606	(3,090)	(4,854)	(1,401)
Total other comprehensive income (loss)	(2,488)	4,776	7,521	2,076
Comprehensive income	$ 4,542	$ 9,926	$ 27,783	$ 13,492

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Initial Public Offering [Member]	Series A Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member]Initial Public Offering [Member]	Retained Earnings [Member]	Retained Earnings [Member]Series A Preferred Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2014	$ 121,799		$ 10,000	$ 94,251		$ 15,372		$ 2,176
Beginning balance, shares at Dec. 31, 2014				7,756,411
Exercise of common stock options, net	780			$ 780
Exercise of common stock options, net, number of shares				80,331
Exercise of common stock warrants	60			$ 60
Exercise of common stock warrants, number of shares				4,970
Dividends paid on Series A preferred stock	(75)						$ (75)
Issuance of restricted stock, net of forfeitures				28,229
Stock based compensation expense, net of restricted share forfeitures	619			$ 619
Stock issued related to initial public offering, net of stock issuance costs		$ 50,423			$ 50,423
Common stock, shares					2,640,000
Stock issued (divestment) in conjunction with 401(k) employer match, net of distributions	365			$ 365
Stock issued (divestment) in conjunction with 401(k) employer match, net of distributions, number of shares				14,689
Excess tax benefit from exercise of stock options	147			$ 147
Net income	11,416					11,416
Other comprehensive income	2,076							2,076
Ending balance at Sep. 30, 2015	187,610		10,000	$ 146,645		26,713		4,252
Ending balance, shares at Sep. 30, 2015				10,524,630
Beginning balance at Dec. 31, 2015	188,816		10,000	$ 147,784		31,352		(320)
Beginning balance, shares at Dec. 31, 2015				10,571,377
Redemption of Series A preferred stock			$ (10,000)
Exercise of common stock options, net	$ 1,357			$ 1,357
Exercise of common stock options, net, number of shares	167,899			152,003
Exercise of common stock warrants	$ 79			$ 79
Exercise of common stock warrants, number of shares				6,575
Dividends paid on Series A preferred stock	(23)						$ (23)
Stock based compensation expense, net of restricted share forfeitures	1,201			$ 1,201
Issuance of restricted stock, net of forfeitures				34,480
Stock issued (divestment) in conjunction with 401(k) employer match, net of distributions	185			$ 185
Stock issued (divestment) in conjunction with 401(k) employer match, net of distributions, number of shares				6,952
Excess tax benefit from restricted stock vesting	94			$ 94
Excess tax benefit from exercise of stock options	522			522
Net income	20,262					20,262
Other comprehensive income	7,521							7,521
Ending balance at Sep. 30, 2016	$ 209,644			$ 150,852		$ 51,591		$ 7,201
Ending balance, shares at Sep. 30, 2016				10,757,483

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net income	$ 20,262	$ 11,416
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization on premises and equipment	986	996
Accretion of purchase accounting adjustments	(488)	(1,551)
Net amortization of securities	5,428	3,426
Amortization of loan servicing right asset	905	644
Amortization of core deposit intangible	431	499
Amortization of debt issuance costs	79
Provision for loan losses	4,095	3,154
Deferred income tax benefit	(1,015)	(567)
Origination of loans held for sale	(260,598)	(236,831)
Proceeds from sale of loans held for sale	253,701	245,194
Net gain on sale of loans	(6,859)	(5,573)
Gain on sale of available for sale securities	(1,535)	(380)
Gain on call of held to maturity securities		(149)
Income from bank owned life insurance	(486)	(444)
Net gain on foreclosed assets	(36)	(30)
Loss on sale of assets held for sale	98
Stock-based compensation	1,201	619
Compensation expense related to common stock issued to 401(k) plan	404	356
Deferred gain on sale of loans	(46)	(27)
Net change in:
Accrued interest receivable and other assets	(1,033)	(3,986)
Accrued interest payable and other liabilities	2,261	2,190
Net cash from operating activities	17,755	18,956
Securities available for sale :
Sales	74,203	52,064
Purchases	(223,432)	(467,067)
Maturities, prepayments and calls	64,502	187,222
Securities held to maturity :
Purchases	(92,646)	(88,550)
Maturities, prepayments and calls	14,088	9,394
Net change in loans	(349,944)	(335,238)
Purchase of bank owned life insurance		(10,344)
Proceeds from sale of assets held for sale	1,542	4,080
Purchase of restricted equity securities	(3,831)	(2,342)
Proceeds from sale of foreclosed assets	336	531
Purchases of premises and equipment, net	(2,142)	(692)
Increase in certificates of deposits at other financial institutions	(805)
Net cash from investing activities	(518,129)	(650,942)
Cash flows from financing activities
Increase in deposits	403,915	542,422
Decrease in federal funds purchased and repurchase agreements	(55,243)	(1,460)
Proceeds from Federal Home Loan Bank advances	305,000	157,000
Repayment of Federal Home Loan Bank advances	(200,000)	(119,000)
Proceeds from other borrowings	10,000
Repayment of other borrowings	(10,000)
Proceeds from issuance of subordinated notes, net of issuance costs	58,213
Proceeds from exercise of common stock warrants	79	60
Proceeds from exercise of common stock options, including excess tax benefit	1,879	927
Excess tax benefit from restricted stock vesting	94
Proceeds from issuance of common stock, net of offering costs		50,423
Divestment of common stock issued to 401(k) plan	(185)
Redemption of Series A preferred stock	(10,000)
Dividends paid on preferred stock	(23)	(75)
Net cash from financing activities	503,729	630,297
Net change in cash and cash equivalents	3,355	(1,689)
Cash and cash equivalents at beginning of period	52,394	49,347
Cash and cash equivalents at end of period	55,749	47,658
Supplemental information:
Interest paid	11,931	6,254
Income taxes paid	$ 9,650	$ 6,339

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	NOTE 1—BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles (U.S. GAAP). All adjustments which are, in the opinion of management, necessary for a fair presentation of the results for the periods reported have been included as required by Regulation S-X, Rule 10-01. All such adjustments are of a normal recurring nature. It is suggested that these interim consolidated financial statements and notes be read in conjunction with the financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K filed with the SEC on March 15, 2016. These consolidated financial statements include the accounts of Franklin Financial Network, Inc. (“FFN”), and its wholly-owned subsidiaries, Franklin Synergy Bank (“Franklin Synergy” or the “Bank”) and Franklin Synergy Risk Management, Inc. (collectively, the “Company”). Franklin Synergy Investments of Tennessee, Inc., Franklin Synergy Investments of Nevada, Inc., and Franklin Synergy Preferred Capital, Inc. are direct or indirect subsidiaries of the Bank and are included in these consolidated financial statements. Significant intercompany transactions and accounts are eliminated in consolidation.

Securities

Securities	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Securities	NOTE 2—SECURITIES The following table summarizes the amortized cost and fair value of the securities available for sale portfolio at September 30, 2016 and December 31, 2015 and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income. Amortized Gross Gross Fair September 30, 2016 U.S. government sponsored entities and agencies $ 3,000 $ 138 $ — $ 3,138 Mortgage-backed securities: residential 546,805 10,346 (354 ) 556,797 Mortgage-backed securities: commercial 19,526 233 — 19,759 State and political subdivisions 89,576 1,820 (334 ) 91,062 Total $ 658,907 $ 12,537 $ (688 ) $ 670,756 Amortized Gross Gross Fair December 31, 2015 U.S. government sponsored entities and agencies $ 6,792 $ 72 $ (47 ) $ 6,817 Mortgage-backed securities: residential 502,916 2,386 (4,347 ) 500,955 Mortgage-backed securities: commercial 19,993 22 (180 ) 19,835 State and political subdivisions 46,664 1,570 (3 ) 48,231 Total $ 576,365 $ 4,050 $ (4,577 ) $ 575,838 The amortized cost and fair value of the securities held to maturity portfolio at September 30, 2016 and December 31, 2015 and the corresponding amounts of gross unrecognized gains and losses were as follows: Amortized Gross Gross Fair September 30, 2016 U.S. government sponsored entities and agencies $ 203 $ 7 $ — $ 210 Mortgage backed securities: residential 112,071 1,014 (124 ) 112,961 State and political subdivisions 122,776 7,999 — 130,775 Total $ 235,050 $ 9,020 $ (124 ) $ 243,946 Gross Gross Gross Fair December 31, 2015 U.S. government sponsored entities and agencies $ 3,300 $ 11 $ (72 ) $ 3,239 Mortgage backed securities: residential 30,398 410 (408 ) 30,400 State and political subdivisions 124,502 3,841 (13 ) 128,330 Total $ 158,200 $ 4,262 $ (493 ) $ 161,969 The proceeds from sales and calls of securities available for sale and the associated gains and losses were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Proceeds $ 11,939 $ 19,776 $ 74,203 $ 54,064 Gross gains 430 $ 95 1,920 485 Gross losses — (90 ) (385 ) (105 ) The proceeds from calls of securities held to maturity that were called at a price in excess of par value and the associated gains were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Proceeds $ — — $ — $ 2,300 Gross gains — — — 149 Gross losses — — — — The amortized cost and fair value of the investment securities portfolio are shown by contractual maturity. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. September 30, 2016 Amortized Fair Available for sale Over one year through five years $ 3,000 $ 3,138 Over ten years 89,576 91,062 Mortgage-backed securities: residential 546,805 556,797 Mortgage-backed securities: commercial 19,526 19,759 Total $ 658,907 $ 670,756 Held to maturity Over one year through five years $ 706 $ 750 Over five years through ten years 5,073 5,351 Over ten years 117,200 124,884 Mortgage-backed securities: residential 112,071 112,961 Total $ 235,050 $ 243,946 Securities pledged at September 30, 2016 and December 31, 2015 had a carrying amount of $742,828 and $595,524, respectively, and were pledged to secure public deposits and repurchase agreements. At September 30, 2016 and December 31, 2015, there were no holdings of securities of any one issuer, other than the U.S. government-sponsored entities and agencies, in an amount greater than 10% of shareholders’ equity. The following table summarizes the securities with unrealized and unrecognized losses at September 30, 2016 and December 31, 2015, aggregated by major security type and length of time in a continuous unrealized loss position: Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized September 30, 2016 Available for sale Mortgage-backed securities: residential $ 36,585 $ (269 ) $ 13,659 $ (85 ) $ 50,244 $ (354 ) State and political subdivisions 43,314 (334 ) — — 43,314 (334 ) Total available for sale $ 79,899 $ (603 ) $ 13,659 $ (85 ) $ 93,558 $ (688 ) Less Than 12 Months 12 Months or Longer Total Fair Unrecognized Fair Unrecognized Fair Unrecognized Held to maturity Mortgage-backed securities: residential $ 19,200 $ (54 ) $ 3,826 $ (70 ) $ 23,026 $ (124 ) Total held to maturity $ 19,200 $ (54 ) $ 3,826 $ (70 ) $ 23,026 $ (124 ) Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2015 Available for sale U.S. government sponsored entities and agencies $ 2,703 $ (47 ) $ — $ — $ 2,703 $ (47 ) Mortgage-backed securities: residential 313,570 (3,691 ) 23,319 (656 ) 336,889 (4,347 ) Mortgage-backed securities: commercial 15,980 (180 ) — — 15,980 (180 ) State and political subdivisions 716 (3 ) — — 716 (3 ) Total available for sale $ 332,969 $ (3,921 ) $ 23,319 $ (656 ) $ 356,288 $ (4,577 ) Less Than 12 Months 12 Months or Longer Total Fair Unrecognized Fair Unrecognized Fair Unrecognized Held to maturity U.S. government sponsored entities and agencies $ 1,957 $ (43 ) $ 971 $ (29 ) $ 2,928 $ (72 ) Mortgage-backed securities: residential 9,788 (97 ) 5,481 (311 ) 15,269 (408 ) State and political subdivisions 3,351 (13 ) — — 3,351 (13 ) Total held to maturity $ 15,096 $ (153 ) $ 6,452 $ (340 ) $ 21,548 $ (493 ) Unrealized and unrecognized losses on debt securities have not been recognized into income because the issuers’ bonds are of high credit quality (rated AA or higher), management does not intend to sell and it is likely that management will not be required to sell the securities prior to their anticipated recovery, and the decline in fair value is largely due to changes in interest rates and other market conditions. The fair value is expected to recover as the bonds approach maturity.

Loans

Loans	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans	NOTE 3—LOANS Loans at September 30, 2016 and December 31, 2015 were as follows: September 30, December 31, Loans that are not PCI loans Construction and land development $ 474,255 $ 372,767 Commercial real estate: Nonfarm, nonresidential 403,382 353,268 Other 26,866 10,955 Residential real estate: Closed-end 1-4 family 228,672 162,933 Other 142,374 112,001 Commercial and industrial 372,784 283,888 Consumer and other 3,458 6,577 Loans before net deferred loan fees 1,651,791 1,302,389 Deferred loan fees, net (820 ) (2,476 ) Total loans that are not PCI loans 1,650,971 1,299,913 PCI loans Construction and land development $ 81 $ 78 Commercial real estate: Nonfarm, nonresidential 576 1,460 Other — — Residential real estate: Closed-end 1-4 family 497 562 Other — 1 Commercial and industrial 1,933 1,812 Consumer and other — — Total PCI loans 3,087 3,913 Allowance for loan losses (15,590 ) (11,587 ) Total loans, net of allowance for loan losses $ 1,638,468 $ 1,292,239 The following table presents the activity in the allowance for loan losses by portfolio segment for the three month periods ended September 30, 2016 and 2015: Construction Commercial Residential Commercial Consumer Total Three Months Ended September 30, 2016 Allowance for loan losses: Beginning balance $ 3,624 $ 3,865 $ 2,060 $ 4,655 $ 49 $ 14,253 Provision for loan losses 427 43 451 455 16 1,392 Loans charged-off (11 ) — (40 ) — (19 ) (70 ) Recoveries — — 13 — 2 15 Total ending allowance balance $ 4,040 $ 3,908 $ 2,484 $ 5,110 $ 48 $ 15,590 Three Months Ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Provision for loan losses 461 135 (71 ) 1,253 (54 ) 1,724 Loans charged-off — — (15 ) (15 ) (33 ) (63 ) Recoveries — — 6 — 61 67 Total ending allowance balance $ 3,028 $ 2,456 $ 1,659 $ 2,562 $ 39 $ 9,744 The following table presents the activity in the allowance for loan losses by portfolio segment for the nine-month periods ended September 30, 2016 and 2015: Construction Commercial Residential Commercial Consumer Total Nine Months Ended September 30, 2016 Allowance for loan losses: Beginning balance $ 3,186 $ 3,146 $ 1,861 $ 3,358 $ 36 $ 11,587 Provision for loan losses 865 762 609 1,817 42 4,095 Loans charged-off (11 ) — (39 ) (65 ) (35 ) (150 ) Recoveries — — 53 — 5 58 Total ending allowance balance $ 4,040 $ 3,908 $ 2,484 $ 5,110 $ 48 $ 15,590 Nine Months Ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,690 $ 1,494 $ 1,791 $ 650 $ 55 $ 6,680 Provision for loan losses $ 338 962 (114 ) 1,927 41 3,154 Loans charged-off — — (32 ) (15 ) (121 ) (168 ) Recoveries — — 14 — 64 78 Total ending allowance balance $ 3,028 $ 2,456 $ 1,659 $ 2,562 $ 39 $ 9,744 The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2016 and December 31, 2015. For purposes of this disclosure, recorded investment in loans excludes accrued interest receivable and deferred loan fees, net due to immateriality. Construction Commercial Residential Commercial Consumer Total September 30, 2016 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 115 $ — $ 115 Collectively evaluated for impairment 4,040 3,908 2,484 4,995 48 15,475 Purchased credit-impaired loans — — — — — — Total ending allowance balance $ 4,040 $ 3,908 $ 2,484 $ 5,110 $ 48 $ 15,590 Loans: Individually evaluated for impairment $ — $ 835 $ 1,070 $ 509 $ — $ 2,414 Collectively evaluated for impairment 474,255 429,413 369,976 372,275 3,458 1,649,377 Purchased credit-impaired loans 81 576 497 1,933 — 3,087 Total ending loans balance $ 474,336 $ 430,824 $ 371,543 $ 374,717 $ 3,458 $ 1,654,878 December 31, 2015 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 113 $ — $ 113 Construction Commercial Residential Commercial Consumer Total Collectively evaluated for impairment 3,186 3,137 1,861 3,245 36 11,465 Purchased credit-impaired loans — 9 — — — 9 Total ending allowance balance $ 3,186 $ 3,146 $ 1,861 $ 3,358 $ 36 $ 11,587 Loans: Individually evaluated for impairment $ 1,943 $ 908 $ 1,185 $ 134 $ — $ 4,170 Collectively evaluated for impairment 370,824 363,315 273,749 283,754 6,577 1,298,219 Purchased credit-impaired loans 78 1,460 563 1,812 — 3,913 Total ending loans balance $ 372,845 $ 365,683 $ 275,497 $ 285,700 $ 6,577 $ 1,306,302 Loans collectively evaluated for impairment reported at September 30, 2016 include certain acquired loans. At September 30, 2016, these non-PCI loans had a carrying value of $82,669, comprised of contractually unpaid principal totaling $84,848 and discounts totaling $2,179. Management evaluated these loans for credit deterioration since acquisition and determined that $32 in allowance for loan losses was necessary at September 30, 2016. The following table presents information related to impaired loans by class of loans as of September 30, 2016 and December 31, 2015: Unpaid * Recorded Allowance for September 30, 2016 With no allowance recorded: Commercial real estate: Nonfarm, nonresidential $ 2,421 $ 835 $ — Residential real estate: Closed-end 1-4 family 238 238 — Other 832 832 — Commercial and industrial 19 19 — Consumer and other — — — Subtotal 3,510 1,924 — With an allowance recorded: Commercial and industrial 490 490 115 Subtotal 490 490 115 Total $ 4,000 $ 2,414 $ 115 December 31, 2015 With no allowance recorded: Construction and land development $ 1,943 $ 1,943 $ — Commercial real estate: Nonfarm, nonresidential 2,495 908 — Residential real estate: Closed-end 1-4 family 476 476 — Other 709 709 — Commercial and industrial 21 21 — Subtotal 5,644 4,057 — With an allowance recorded: Commercial and industrial 113 113 113 Subtotal 113 113 113 Total $ 5,757 $ 4,170 $ 113 * The following table presents the average recorded investment of impaired loans by class of loans for the three months ended September 30, 2016 and 2015: Three Months Ended September 30, Nine Months Ended September 30, Average Recorded Investment 2016 2015 2016 2015 With no allowance recorded: Construction and land development $ — $ — $ 340 $ — Commercial real estate: Nonfarm, nonresidential 1,427 918 1,307 873 Residential real estate: Closed-end 1-4 family 451 33 533 188 Other 837 712 768 317 Commercial and industrial 46 23 110 77 Consumer and other — 25 10 8 Subtotal 2,761 1,711 3,068 1,463 With an allowance recorded: Commercial and industrial $ 490 $ 90 $ 247 $ 50 Residential real estate: Closed-end 1-4 family 70 — 23 — Consumer and other — 16 — 10 Subtotal 560 106 270 60 Total $ 3,321 $ 1,817 $ 3,338 $ 1,523 The impact on net interest income for these loans was not material to the Company’s results of operations for the three and nine months ended September 30, 2016 and 2015. The following table presents the recorded investment in nonaccrual and loans past due over 90 days still on accrual by class of loans as of September 30, 2016 and December 31, 2015: Nonaccrual Loans Past Due September 30, 2016 Construction and land development $ — $ 149 Commercial real estate: Nonfarm, nonresidential 835 — Residential real estate: Other 123 — Commercial and industrial 490 — Total $ 1,448 $ 149 December 31, 2015 Construction and land development $ — $ 1,943 Commercial real estate: Nonfarm, nonresidential 835 — Residential real estate: Closed-end 1-4 family 41 435 Commercial and industrial 32 — Total $ 908 $ 2,378 Nonaccrual loans and loans past due 90 days still on accrual include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired 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: 30-59 60-89 Greater Total Loans PCI Total September 30, 2016 Construction and land development $ 1,950 $ — $ 149 $ 2,099 $ 472,156 $ 81 $ 474,336 Commercial real estate: Nonfarm, nonresidential 79 — 835 914 402,468 576 403,958 Other — — — — 26,866 — 26,866 Residential real estate: Closed-end 1-4 family 11 — — 11 228,661 497 229,169 Other 714 — 123 837 141,537 — 142,374 Commercial and industrial 521 875 490 1,886 370,898 1,933 374,717 Consumer and other — — — — 3,458 — 3,458 $ 3,275 $ 875 $ 1,597 $ 5,747 $ 1,646,044 $ 3,087 $ 1,654,878 30-59 60-89 Greater Total Loans PCI Total December 31, 2015 Construction and land development $ — $ 149 $ 1,943 $ 2,092 $ 370,675 $ 78 $ 372,845 Commercial real estate: Nonfarm, nonresidential 258 — 835 1,093 352,175 1,460 354,728 Other — — — — 10,955 — 10,955 Residential real estate: Closed-end 1-4 family 213 — 476 689 162,244 562 163,495 Other 30 — — 30 111,971 1 112,002 Commercial and industrial 86 32 — 118 283,770 1,812 285,700 Consumer and other 2 — — 2 6,575 — 6,577 $ 589 $ 181 $ 3,254 $ 4,024 $ 1,298,365 $ 3,913 $ 1,306,302 Credit Quality Indicators: Special Mention. Substandard. Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass-rated loans. The following table includes PCI loans, which are included in the “Substandard” column. Based on the most recent analysis performed, the risk category of loans by class of loans is as follows as of September 30, 2016 and December 31, 2015: Pass Special Substandard Total September 30, 2016 Construction and land development $ 472,980 $ — $ 1,356 $ 474,336 Commercial real estate: Nonfarm, nonresidential 395,852 1,791 6,315 403,958 Other 26,866 — — 26,866 Residential real estate: Closed-end 1-4 family 228,144 — 1,025 229,169 Other 141,305 — 1,069 142,374 Commercial and industrial 368,860 — 5,857 374,717 Consumer and other 3,458 — — 3,458 $ 1,637,465 $ 1,791 $ 15,622 $ 1,654,878 Pass Special Substandard Total December 31, 2015 Construction and land development $ 370,824 $ — $ 2,021 $ 372,845 Commercial real estate: Nonfarm, nonresidential 352,451 — 2,277 354,728 Other 10,955 — — 10,955 Residential real estate: 1-4 family 162,160 — 1,335 163,495 Other 111,292 — 710 112,002 Commercial and industrial 284,144 — 1,556 285,700 Consumer and other 6,577 — — 6,577 $ 1,298,403 $ — $ 7,899 $ 1,306,302 Purchased Credit-impaired (“PCI”) loans Income is recognized on PCI loans pursuant to ASC Topic 310-30. A portion of the fair value discount is recognized as an accretable yield that is accreted into interest income over the estimated remaining life of the loans. The remaining non-accretable difference represents cash flows not expected to be collected. The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans as of September 30, 2016 and December 31, 2015. Sept 30, 2016 Dec 31, 2015 Contractually required principal and interest $ 4,276 $ 5,618 Non-accretable difference (321 ) (352 ) Cash flows expected to be collected 3,955 5,266 Accretable yield (868 ) (1,353 ) Carrying value of acquired loans 3,087 3,913 Allowance for loan losses — (9 ) Carrying value less allowance for loan losses $ 3,087 $ 3,904 Management adjusted estimates of future expected losses, cash flows and renewal assumptions during the quarter ended September 30, 2016. These adjustments resulted in changes in expected cash flows, accretable yield, and the non-accretable difference for the three and nine months ended September 30, 2016. The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three-month periods ended September 30, 2016 and 2015. Activity during the three month period ended September 30, 2016 Jun 30, 2016 Effect of Income All other Sep 30, 2016 Contractually required principal and interest $ 4,462 $ — $ — $ (186 ) $ 4,276 Non-accretable difference (319 ) — — (2 ) (321 ) Cash flows expected to be collected 4,143 — — (188 ) 3,955 Accretable yield (1,067 ) — 115 84 (868 ) Carrying value of acquired loans $ 3,076 $ — $ 115 $ (104 ) $ 3,087 Activity during the three month period ended September 30, 2015 Jun 30, 2015 Effect of Income All other Sep 30, 2015 Contractually required principal and interest $ 6,000 $ — $ — $ (128 ) $ 5,872 Non-accretable difference (973 ) — 839 (173 ) (307 ) Cash flows expected to be collected 5,027 — 839 (301 ) 5,565 Accretable yield (749 ) — 447 (1,350 ) (1,652 ) Carrying value of acquired loans $ 4,278 $ — $ 1,286 $ (1,651 ) $ 3,913 The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the nine-month periods ended September 30, 2016 and 2015. Activity during the nine month period ended September 30, 2016 Dec 31, 2015 Effect of Income All other Sep 30, 2016 Contractually required principal and interest $ 5,618 $ — $ — $ (1,342 ) $ 4,276 Non-accretable difference (352 ) — — 31 (321 ) Cash flows expected to be collected 5,266 — — (1,311 ) 3,955 Accretable yield (1,353 ) — 444 41 (868 ) Carrying value of acquired loans $ 3,913 $ — $ 444 $ (1,270 ) $ 3,087 Activity during the nine month period ended September 30, 2015 Dec 31, 2014 Effect of Income All other Sep 30, 2015 Contractually required principal and interest $ 6,532 $ — $ — $ (660 ) $ 5,872 Non-accretable difference (1,270 ) — 839 124 (307 ) Cash flows expected to be collected 5,262 — 839 (536 ) 5,565 Accretable yield (947 ) — 637 (1,342 ) (1,652 ) Carrying value of acquired loans $ 4,315 $ — $ 1,476 $ (1,878 ) $ 3,913 Troubled Debt Restructurings The Company’s loan portfolio contains no loans that have been modified in a troubled debt restructuring.

Loan Servicing

Loan Servicing	9 Months Ended
	Sep. 30, 2016
Text Block [Abstract]
Loan Servicing	NOTE 4—LOAN SERVICING Loans serviced for others are not reported as assets. The principal balances of these loans at September 30, 2016 and December 31, 2015 are as follows: September 30, December 31, Loan portfolios serviced for: Federal Home Loan Mortgage Corporation $ 491,466 $ 463,952 Other 3,249 4,037 The components of net loan servicing fees for the three and nine months ended September 30, 2016 and 2015 were as follows: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Loan servicing fees, net: Loan servicing fees $ 309 $ 287 $ 903 $ 831 Amortization of loan servicing fees (349 ) (203 ) (905 ) (644 ) Change in impairment — — — — Total $ (40 ) $ 84 $ (2 ) $ 187 The fair value of servicing rights was estimated by management to be approximately $3,948 at September 30, 2016. Fair value for September 30, 2016 was determined using a weighted average discount rate of 10.5% and a weighted average prepayment speed of 14.7%. At December 31, 2015, the fair value of servicing rights was estimated by management to be approximately $4,635. Fair value for December 31, 2015 was determined using weighted average discount rate of 10.5% and a weighted average prepayment speed of 10.2%.

Securities Sold Under Agreement

Securities Sold Under Agreement to Repurchase	9 Months Ended
	Sep. 30, 2016
Brokers and Dealers [Abstract]
Securities Sold Under Agreement to Repurchase	NOTE 5—SECURITIES SOLD UNDER AGREEMENT TO REPURCHASE Our subsidiary bank enters into borrowing arrangements with our retail business customers and correspondent banks through agreements to repurchase (“securities sold under agreements to repurchase”) under which the bank pledges investment securities owned and under its control as collateral against these short-term borrowing arrangements. At maturity the securities underlying the agreements are returned to the Company. At September 30, 2016 and December 31, 2015, these short-term borrowings totaled $37,343 and $61,261, respectively, and were secured by securities with carrying amounts of $38,333 and $73,478, respectively. At September 30, 2016, all of the Company’s repurchase agreements had one-day maturities. The following table provides additional details as of September 30, 2016: As of September 30, 2016 U.S. Mortgage- State and Total Fair value of securities pledged $ 210 $ 59 $ 40,565 $ 40,834 Borrowings related to pledged amounts $ — $ — $ 37,343 $ 37,343 Fair value pledged as a % of borrowings — % — % 109 % 109 %

Share-Based Payments

Share-Based Payments	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Payments	NOTE 6—SHARE-BASED PAYMENTS In connection with the Company’s 2010 private offering, 32,425 warrants were issued to shareholders, one warrant for every twenty shares of common stock purchased. Each warrant allows the shareholders to purchase an additional share of common stock at $12.00 per share. The warrants were issued with an effective date of March 30, 2010 and will be exercisable in whole or in part up to seven years following the date of issuance. The warrants are detachable from the common stock. There were 6,575 and 4,970 warrants exercised during the nine months ended September 30, 2016 and 2015, respectively. A summary of the stock warrant activity for the nine months ended September 30, 2016 and 2015 follows: September 30, September 30, Stock warrants exercised: Intrinsic value of warrants exercised $ 136 $ 46 Cash received from warrants exercised 79 60 At September 30, 2016, there were 18,732 outstanding warrants associated with the 2010 offering. Since the common stock of the Company is registered under the Securities Act and has been traded on a national securities exchange at $15.00 or more for forty-five (45) consecutive days, the Company may redeem the 2010 warrants at any time with not less than thirty (30) days’ written notice to the holders of such 2010 warrants, in whole or in part, at a redemption price of $1.00 per warrant; provided, however, that the holder of the 2010 warrant may exercise the 2010 warrant, in whole or in part, during such thirty (30) day period. The Company has two share based compensation plans as described below. Total compensation cost that has been charged against income for those plans was $406 and $248 and $1,201 and $619 for the three and nine months ended September 30, 2016 and 2015, respectively. The total income tax benefit related to vesting of restricted stock and exercises of stock options was $616 and $147 for the nine months ended September 30, 2016 and 2015. The total income tax benefit for the three months ended September 30, 2016 was $107. There was no excess tax benefit from the exercise of stock options for the three months ended September 30, 2015. Stock Option Plan Employee, organizer and director awards are generally granted with an exercise price equal to the market price of the Company’s common stock at the date of grant; those option awards have a vesting period of three to five years and have a ten-year contractual term. The Company assigns discretion to its Board of Directors to make grants either as qualified incentive stock options or as non-qualified stock options. All employee grants are intended to be treated as qualified incentive stock options, if allowable. All other grants are expected to be treated as non-qualified. The fair value of each option award is estimated on the date of grant using a closed form option valuation (Black-Scholes) model that uses the assumptions noted in the table below. Expected stock price volatility is based on historical volatilities of the Company’s common stock. The Company uses historical data to estimate option exercise and post-vesting termination behavior. The expected term of options granted represents the period of time that options granted are expected to be outstanding, which takes into account that the options are not transferable. The risk-free interest rate for the expected term of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. The fair value of options granted was determined using the following weighted-average assumptions as of grant date. September 30, September 30, Risk-free interest rate 1.60 % 1.84 % Expected term 7.5 years 7.5 years Expected stock price volatility 30.09 % 25.00 % Dividend yield 0.24 % 0.22 % The weighted average fair value of options granted for the nine months ended September 30, 2016 and 2015 were $9.78 and $6.41, respectively. A summary of the activity in the stock option plans for the nine months ended September 30, 2016 follows: Shares Weighted Weighted Aggregate Outstanding at beginning of year 1,312,791 $ 13.04 6.23 $ 24,070 Granted 272,087 27.99 Exercised (167,899 ) 11.27 Forfeited, expired, or cancelled (2,415 ) 19.43 Outstanding at period end 1,414,564 $ 16.12 6.49 $ 30,103 Vested or expected to vest 1,343,836 $ 16.12 6.49 $ 28,598 Exercisable at period end 784,022 $ 11.53 4.83 $ 20,282 For the nine months 2016 2015 Stock options exercised: Intrinsic value of options exercised $ 3,463 $ 839 Cash received from options exercised 1,357 780 Tax benefit realized from option exercises 522 147 As of September 30, 2016, there was $3,583 of total unrecognized compensation cost related to non-vested stock options granted under the Plan. The cost is expected to be recognized over a weighted-average period of 4.1 years. Restricted Share Award Plan A summary of activity for non-vested restricted share awards for the nine months ended September 30, 2016 is as follows: Non-vested Shares Shares Weighted-Average Grant-Date Non-vested at December 31, 2015 105,864 $ 15.89 Granted 36,396 28.45 Vested (32,607 ) 16.70 Forfeited (1,916 ) 16.00 Non-vested at September 30, 2016 107,737 $ 18.80 Compensation expense associated with the restricted share awards is recognized on a straight-line basis over the time period that the restrictions associated with the awards lapse based on the total cost of the award at the grant date. As of September 30, 2016, there was $1,917 of total unrecognized compensation cost related to non-vested shares granted under the Plan. The cost is expected to be recognized over a weighted-average period of 3.2 years. The total fair value of shares vested during the nine months ended September 30, 2016 and 2015 was $974 and $520, respectively.

Regulatory Capital Matters

Regulatory Capital Matters	9 Months Ended
	Sep. 30, 2016
Banking and Thrift [Abstract]
Regulatory Capital Matters	NOTE 7—REGULATORY CAPITAL MATTERS Banks and bank holding companies are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off-balance-sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action. The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. Banks (Basel III rules) became effective for the Company on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. The Basel III rules additionally provide for countercyclical capital requirements so that the required amount of capital increases in times of economic expansion and decreases in times of economic contraction, consistent with safety and soundness. Under the Basel III rules, banks must maintain a capital conservation buffer consisting of additional Common Equity Tier 1 Capital equal to 2.5% of risk-weighted assets above each of the required minimum capital levels in order to avoid limitations on paying dividends, engaging in share repurchases, and paying certain discretionary bonuses. This new capital conservation buffer requirement was phased in beginning January 2016 at 0.625% of risk-weighted assets and will increase each year until fully implemented at 2.5% in January 2019. Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required. At September 30, 2016, the most recent regulatory notifications categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. Management believes, as of September 30, 2016, that the Company and Bank met all capital adequacy requirements to which they are subject. There are no conditions or events since that notification that management believes have changed the institution’s category. Actual and required capital amounts and ratios are presented below as of September 30, 2016 and December 31, 2015 for the Company and Bank: Actual Required (1) To Be Well Amount Ratio Amount Ratio Amount Ratio September 30, 2016 Company common equity Tier 1 capital to risk-weighted assets $ 188,225 9.09 % $ 93,188 4.50 % N/A N/A Company Total Capital to risk weighted assets $ 262,107 12.66 % $ 165,667 8.00 % N/A N/A Company Tier 1 (Core) Capital to risk weighted assets $ 188,225 9.09 % $ 124,250 6.00 % N/A N/A Company Tier 1 (Core) Capital to average assets $ 188,225 7.15 % $ 105,361 4.00 % N/A N/A Bank common equity Tier 1 capital to risk-weighted assets $ 243,995 11.77 % $ 93,314 4.50 % $ 134,787 6.50 % Bank Total Capital to risk weighted assets $ 259,585 12.52 % $ 165,892 8.00 % $ 207,365 10.00 % Bank Tier 1 (Core) Capital to risk weighted assets $ 243,995 11.77 % $ 124,419 6.00 % $ 165,892 8.00 % Bank Tier 1 (Core) Capital to average assets $ 243,995 9.26 % $ 105,343 4.00 % $ 131,678 5.00 % December 31, 2015 Company common equity Tier 1 capital to risk-weighted assets $ 167,562 10.08 % $ 74,768 4.50 % N/A N/A Company Total Capital to risk weighted assets $ 186,243 11.21 % $ 132,922 8.00 % N/A N/A Company Tier 1 (Core) Capital to risk weighted assets $ 174,656 10.51 % $ 99,691 6.00 % N/A N/A Company Tier 1 (Core) Capital to average assets $ 174,656 8.48 % $ 82,362 4.00 % N/A N/A Bank common equity Tier 1 capital to risk-weighted assets $ 172,205 10.36 % $ 74,772 4.50 % $ 108,004 6.50 % Bank Total Capital to risk weighted assets $ 183,792 11.06 % $ 132,928 8.00 % $ 166,160 10.00 % Bank Tier 1 (Core) Capital to risk weighted assets $ 172,205 10.36 % $ 99,696 6.00 % $ 132,928 8.00 % Bank Tier 1 (Core) Capital to average assets $ 172,205 8.36 % $ 82,357 4.00 % $ 102,946 5.00 % (1) Dividend Restrictions

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value	NOTE 8—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 other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. Securities Derivatives Impaired Loans Foreclosed Assets Appraisals for both collateral-dependent impaired loans and real estate owned are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, a member of the credit administration department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. On an annual basis, the Company compares the actual selling price of collateral that has been sold to the most recent appraised value to determine what additional adjustment should be made to the appraisal value to arrive at fair value. Loans Held For Sale: Assets and liabilities measured at fair value on a recurring basis, including financial assets and liabilities for which the Company has elected the fair value option, are summarized below: Fair Value Measurements at Quoted Prices Significant Significant Financial Assets Securities available for sale U.S. government sponsored entities and agencies $ — $ 3,138 $ — Mortgage-backed securities-residential — 556,797 — Mortgage-backed securities-commercial — 19,759 — State and political subdivisions — 91,062 — Total securities available for sale $ — $ 670,056 $ — Loans held for sale $ — $ 26,819 $ — Mortgage banking derivatives $ — $ 858 $ — Financial Liabilities Mortgage banking derivatives $ — $ 87 $ — Fair Value Measurements at Quoted Prices Significant Significant Financial Assets Securities available for sale U.S. government sponsored entities and agencies $ — $ 6,817 $ — Mortgage-backed securities-residential — 500,955 — Mortgage-backed securities-commercial — 19,835 — State and political subdivisions — 48,231 — Total securities available for sale $ — $ 575,838 $ — Loans held for sale $ — $ 14,079 $ — Mortgage banking derivatives $ — $ 411 $ — Financial Liabilities Mortgage banking derivatives $ — $ 29 $ — As of September 30, 2016, the unpaid principal balance of loans held for sale was $25,937 resulting in an unrealized gain of $882 included in gains on sale of loans. As of December 31, 2015, the unpaid principal balance of loans held for sale was $13,754, resulting in an unrealized gain of $325 included in gains on sale of loans. For the three months ended September 30, 2016 and 2015, the change in fair value related to loans held for sale, which is included in gain on sale of loans, was $326 and $248, respectively. For the nine months ended September 30, 2016 and 2015, the change in fair value related to loans held for sale, which is included in gain on sale of loans, was $558 and ($22), respectively. None of these loans were 90 days or more past due or on nonaccrual as of September 30, 2016 and December 31, 2015. There were no transfers between level 1 and 2 during 2016 or 2015. Assets measured at fair value on a non-recurring basis are summarized below: There was one collateral dependent impaired loan carried at fair value as of September 30, 2016 that totaled $375. For the three and nine months ended September 30, 2016 and 2015, $115 and $0 in additional provision for loan losses was recorded related to impaired loans recorded at fair value of collateral. There were no collateral dependent impaired loans carried at fair value as of December 31, 2015. Foreclosed assets measured at fair value less costs to sell, had a net carrying amount of zero as of September 30, 2016 and $200 as of December 31, 2015. There were no properties at September 30, 2016 or 2015 that had required write-downs to fair value resulting in no write downs for the three and nine months ended September 30, 2016 and 2015, respectively. The carrying amounts and estimated fair values of financial instruments, at September 30, 2016 and December 31, 2015 are as follows: Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 55,749 $ 55,749 $ — $ — $ 55,749 Certificates of deposit held at other financial institutions 1,055 — 1,055 — 1,055 Securities available for sale 670,756 — 670,756 — 670,756 Securities held to maturity 235,050 — 243,946 — 243,946 Loans held for sale 26,819 — 26,819 — 26,819 Net loans 1,638,468 — — 1,621,695 1,621,695 Restricted equity securities 11,829 n/a n/a n/a n/a Servicing rights, net 3,566 — 3,948 — 3,948 Accrued interest receivable 7,871 — 3,634 4,237 7,871 Financial liabilities Deposits $ 2,217,954 $ 1,223,120 $ 996,482 $ — $ 2,219,602 Federal funds purchased and repurchase agreements 45,843 — 45,843 — 45,843 Federal Home Loan Bank advances 162,000 — 162,024 — 162,024 Subordinated notes, net 58,292 — — 61,867 61,867 Accrued interest payable 1,399 123 915 361 1,399 Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 52,394 $ 52,394 $ — $ — $ 52,394 Certificates of deposit held at other financial institutions 250 — 250 — 250 Securities available for sale 575,838 — 575,838 — 575,838 Securities held to maturity 158,200 — 161,969 — 161,969 Loans held for sale 14,079 — 14,079 — 14,079 Net loans 1,292,239 — — 1,279,849 1,279,849 Restricted equity securities 7,998 n/a n/a n/a n/a Servicing rights, net 3,455 — 4,635 — 4,635 Accrued interest receivable 7,299 3 3,780 3,516 7,299 Financial liabilities Deposits $ 1,814,039 $ 1,062,587 $ 748,961 $ — $ 1,811,548 Federal funds purchased and repurchase agreements 101,086 — 101,086 — 101,086 Federal Home Loan Bank advances 57,000 — 56,931 — 56,931 Accrued interest payable 644 100 544 — 644 The methods and assumptions not previously described used to estimate fair values are described as follows: (a) Cash and Cash Equivalents: (b) Loans: (c) Restricted Equity Securities: (d) Mortgage Servicing Rights: (e) Deposits: (f) Federal Funds Purchased and Repurchase Agreements: (g) Federal Home Loan Bank Advances: (h) Subordinated Notes: (i) Accrued Interest Receivable/Payable: (j) Off-balance Sheet Instruments:

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 9—EARNINGS PER SHARE The two-class method is used in the calculation of basic and diluted earnings per share. Under the two-class method, earnings available to common shareholders for the period are allocated between common shareholders and participating securities according to dividends declared (or accumulated) and participation rights in undistributed earnings. The factors used in the earnings per share computation follow: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Basic Net income available to common shareholders $ 7,030 $ 5,125 $ 20,239 $ 11,341 Less: earnings allocated to participating securities (69 ) (52 ) (213 ) (127 ) Net income allocated to common shareholders $ 6,961 $ 5,073 $ 20,026 $ 11,214 Weighted average common shares outstanding including participating securities 10,721,253 10,516,290 10,652,223 9,668,497 Less: Participating securities (105,343 ) (107,502 ) (111,937 ) (108,617 ) Average shares 10,615,910 10,408,788 10,540,286 9,559,880 Basic earnings per common share $ 0.66 $ 0.49 $ 1.90 $ 1.17 Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Diluted Net income allocated to common shareholders $ 6,961 $ 5,073 $ 20,026 $ 11,214 Weighted average common shares outstanding for basic earnings per common share 10,615,910 10,408,788 10,540,286 9,559,880 Add: Dilutive effects of assumed exercises of stock options 612,955 534,148 585,326 466,955 Add: Dilutive effects of assumed exercises of stock warrants 13,370 13,265 12,937 13,257 Average shares and dilutive potential common shares 11,242,235 10,956,201 11,138,549 10,040,092 Dilutive earnings per common share $ 0.62 $ 0.46 $ 1.80 $ 1.12 For the three months ended September 30, 2016 and 2015, stock options for 272,087 and 226,040 shares of common stock were not considered in computing diluted earnings per common share because they were antidilutive. Stock options for 151,544 and 228,691 shares of common stock were not considered in computing diluted earnings per common share for the nine months ended September 30, 2016 and 2015 because they were antidilutive.

Subordinated Notes

Subordinated Notes	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Subordinated Notes	NOTE 10—SUBORDINATED NOTES On March 31, 2016, the Company completed the issuance of $40,000 in aggregate principal amount of fixed-to-floating rate Subordinated Notes due 2026 (the “March 2016 Notes”) in a public offering to accredited institutional investors. The March 2016 Notes will mature on March 30, 2026, unless redeemed prior to that date. The Company may redeem the March 2016 Notes in whole or in part on or after March 30, 2021, and in whole, but not in part, at any time within 90 days following a “Regulatory Capital Treatment Event”, as defined in the First Supplemental Indenture, dated as of March 31, 2016, between the Company and U.S. Bank National Association, as trustee (the “Supplemental Indenture”) governing the March 2016 Notes. The redemption price for any redemption will be 100% of the principal amount of the March 2016 Notes, plus unpaid interest, if any, accrued to but excluding the date of redemption. Any early redemption of the March 2016 Notes will be subject to the receipt of the approval of the Federal Reserve to the extent then required under applicable laws or regulations, including capital regulations. There is no sinking fund for the March 2016 Notes. The March 2016 Notes initially bear interest at 6.875% per year, payable semi-annually in arrears on March 30 and September 30 of each year, beginning on September 30, 2016, and going through March 29, 2021. Thereafter, the March 2016 Notes will bear interest at an annual floating rate equal to three-month LIBOR as determined for the applicable quarterly period, plus a spread of 5.636%, with interest payable quarterly in arrears on March 30, June 30, September 30 and December 30 of each year, beginning on June 30, 2021. The March 2016 Notes are unsecured and will rank at least equally with all of the Company’s other unsecured subordinated indebtedness and will be effectively subordinated to all of our secured debt to the extent of the value of the collateral securing such debt. The March 2016 Notes will be subordinated in right of payment to all of our existing and future senior indebtedness, and will rank structurally junior to all existing and future liabilities of our subsidiaries including, in the case of the Bank, its depositors, and any preferred equity holders of our subsidiaries. The holders of the March 2016 Notes may be fully subordinated to interests held by the U.S. government in the event that we enter into a receivership, insolvency, liquidation, or similar proceeding. The sale of the March 2016 Notes yielded net proceeds of approximately $38,843 after deducting the placement agents’ fees and estimated expenses payable by the Company. The Company used the net proceeds from the offering to pay off a $10 million borrowing that had been used to redeem the shares of Senior Non-Cumulative Perpetual Preferred Stock, Series A (the “Series A Preferred Stock”) issued to the United States Department of the Treasury (“Treasury”) in connection with the Company’s participation in the Small Business Lending Fund and to fund future growth of the Bank. The issuance costs related to the March 2016 Notes amounted to $1,382 and are being amortized as interest expense over the ten-year term of the March 2016 Notes. On June 30, 2016, the Company completed the issuance of an additional $20,000 aggregate principal amount of its 7.00% fixed-to-floating rate subordinated notes due 2026 (the “June 2016 Notes”) to certain institutional accredited investors in a private offering in reliance on the exemption from the registration requirements of Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”), and the provisions of Rule 506 of Regulation D thereunder. The June 2016 Notes have a stated maturity of July 1, 2026, and bear interest at a fixed rate of 7.00% per year through June 30, 2021, computed on the basis of a 360-day year consisting of twelve 30-day months, payable semi-annually in arrears on January 1 and July 1 of each year beginning on January 1, 2017. Beginning July 1, 2021 through the maturity date or an early redemption date, the interest rate shall reset quarterly to an interest rate per year equal to the then current three-month LIBOR rate plus 604 basis points, computed on the basis of a 360-day year and the actual number of days elapsed, payable quarterly in arrears. The June 2016 Notes are redeemable, in whole or in part, on or after July 1, 2021 and at any time upon the occurrence of certain events set forth in the June 2016 Notes. Any early redemption of the March 2016 Notes will be subject to the receipt of the approval of the Board of Governors of the Federal Reserve System (the “Federal Reserve”) to the extent then required under applicable laws or regulations, including capital regulations. There is no sinking fund for the June 2016 Notes. Principal and interest on the June 2016 Notes are subject to acceleration only in limited circumstances. The June 2016 Notes are unsecured, subordinated obligations of the Company and rank junior in right to payment to the Company’s current and future senior indebtedness and equal with the Company’s previously issued March 2016 Notes The June 2016 Notes are unsecured and will rank at least equally with all of the Company’s other unsecured subordinated indebtedness and will be effectively subordinated to all of our secured debt to the extent of the value of the collateral securing such debt. The June 2016 Notes will be subordinated in right of payment to all of our existing and future senior indebtedness, and will rank structurally junior to all existing and future liabilities of our subsidiaries including, in the case of the Bank, its depositors, and any preferred equity holders of our subsidiaries. The holders of the June 2016 Notes may be fully subordinated to interests held by the U.S. government in the event that we enter into a receivership, insolvency, liquidation, or similar proceeding. The issuance costs related to the June 2016 Notes were $404 and are being amortized as interest expense over the ten-year term of the June 2016 Notes. For regulatory capital purposes, the March 2016 Notes and the June 2016 Notes are treated as Tier 2 capital, subject to certain limitations, and are included in total regulatory capital when calculating the Company’s total capital to risk weighted assets ratio as indicated in Note 7 of these consolidated financial statements. As of September 30, 2016, the Company’s subordinated notes, net of issuance costs, totaled $58,292.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Summary of Amortized Cost and Fair Value of Securities Available for Sale	The following table summarizes the amortized cost and fair value of the securities available for sale portfolio at September 30, 2016 and December 31, 2015 and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income. Amortized Gross Gross Fair September 30, 2016 U.S. government sponsored entities and agencies $ 3,000 $ 138 $ — $ 3,138 Mortgage-backed securities: residential 546,805 10,346 (354 ) 556,797 Mortgage-backed securities: commercial 19,526 233 — 19,759 State and political subdivisions 89,576 1,820 (334 ) 91,062 Total $ 658,907 $ 12,537 $ (688 ) $ 670,756 Amortized Gross Gross Fair December 31, 2015 U.S. government sponsored entities and agencies $ 6,792 $ 72 $ (47 ) $ 6,817 Mortgage-backed securities: residential 502,916 2,386 (4,347 ) 500,955 Mortgage-backed securities: commercial 19,993 22 (180 ) 19,835 State and political subdivisions 46,664 1,570 (3 ) 48,231 Total $ 576,365 $ 4,050 $ (4,577 ) $ 575,838
Schedule of Amortized Cost and Fair Value of Securities Held to Maturity Portfolio	The amortized cost and fair value of the securities held to maturity portfolio at September 30, 2016 and December 31, 2015 and the corresponding amounts of gross unrecognized gains and losses were as follows: Amortized Gross Gross Fair September 30, 2016 U.S. government sponsored entities and agencies $ 203 $ 7 $ — $ 210 Mortgage backed securities: residential 112,071 1,014 (124 ) 112,961 State and political subdivisions 122,776 7,999 — 130,775 Total $ 235,050 $ 9,020 $ (124 ) $ 243,946 Gross Gross Gross Fair December 31, 2015 U.S. government sponsored entities and agencies $ 3,300 $ 11 $ (72 ) $ 3,239 Mortgage backed securities: residential 30,398 410 (408 ) 30,400 State and political subdivisions 124,502 3,841 (13 ) 128,330 Total $ 158,200 $ 4,262 $ (493 ) $ 161,969
Schedule of Amortized Cost and Fair Value of Investment Securities Portfolio by Contractual Maturity	The amortized cost and fair value of the investment securities portfolio are shown by contractual maturity. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately. September 30, 2016 Amortized Fair Available for sale Over one year through five years $ 3,000 $ 3,138 Over ten years 89,576 91,062 Mortgage-backed securities: residential 546,805 556,797 Mortgage-backed securities: commercial 19,526 19,759 Total $ 658,907 $ 670,756 Held to maturity Over one year through five years $ 706 $ 750 Over five years through ten years 5,073 5,351 Over ten years 117,200 124,884 Mortgage-backed securities: residential 112,071 112,961 Total $ 235,050 $ 243,946
Schedule of Unrealized Losses and Fair Value by Major Security Type	The following table summarizes the securities with unrealized and unrecognized losses at September 30, 2016 and December 31, 2015, aggregated by major security type and length of time in a continuous unrealized loss position: Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized September 30, 2016 Available for sale Mortgage-backed securities: residential $ 36,585 $ (269 ) $ 13,659 $ (85 ) $ 50,244 $ (354 ) State and political subdivisions 43,314 (334 ) — — 43,314 (334 ) Total available for sale $ 79,899 $ (603 ) $ 13,659 $ (85 ) $ 93,558 $ (688 ) Less Than 12 Months 12 Months or Longer Total Fair Unrecognized Fair Unrecognized Fair Unrecognized Held to maturity Mortgage-backed securities: residential $ 19,200 $ (54 ) $ 3,826 $ (70 ) $ 23,026 $ (124 ) Total held to maturity $ 19,200 $ (54 ) $ 3,826 $ (70 ) $ 23,026 $ (124 ) Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2015 Available for sale U.S. government sponsored entities and agencies $ 2,703 $ (47 ) $ — $ — $ 2,703 $ (47 ) Mortgage-backed securities: residential 313,570 (3,691 ) 23,319 (656 ) 336,889 (4,347 ) Mortgage-backed securities: commercial 15,980 (180 ) — — 15,980 (180 ) State and political subdivisions 716 (3 ) — — 716 (3 ) Total available for sale $ 332,969 $ (3,921 ) $ 23,319 $ (656 ) $ 356,288 $ (4,577 ) Less Than 12 Months 12 Months or Longer Total Fair Unrecognized Fair Unrecognized Fair Unrecognized Held to maturity U.S. government sponsored entities and agencies $ 1,957 $ (43 ) $ 971 $ (29 ) $ 2,928 $ (72 ) Mortgage-backed securities: residential 9,788 (97 ) 5,481 (311 ) 15,269 (408 ) State and political subdivisions 3,351 (13 ) — — 3,351 (13 ) Total held to maturity $ 15,096 $ (153 ) $ 6,452 $ (340 ) $ 21,548 $ (493 )
Securities Available-for-sale [Member]
Summary of Sales and Calls of Securities	The proceeds from sales and calls of securities available for sale and the associated gains and losses were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Proceeds $ 11,939 $ 19,776 $ 74,203 $ 54,064 Gross gains 430 $ 95 1,920 485 Gross losses — (90 ) (385 ) (105 )
Securities Held-to-maturity [Member]
Summary of Sales and Calls of Securities	The proceeds from calls of securities held to maturity that were called at a price in excess of par value and the associated gains were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Proceeds $ — — $ — $ 2,300 Gross gains — — — 149 Gross losses — — — —

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Summary of Loans	Loans at September 30, 2016 and December 31, 2015 were as follows: September 30, December 31, Loans that are not PCI loans Construction and land development $ 474,255 $ 372,767 Commercial real estate: Nonfarm, nonresidential 403,382 353,268 Other 26,866 10,955 Residential real estate: Closed-end 1-4 family 228,672 162,933 Other 142,374 112,001 Commercial and industrial 372,784 283,888 Consumer and other 3,458 6,577 Loans before net deferred loan fees 1,651,791 1,302,389 Deferred loan fees, net (820 ) (2,476 ) Total loans that are not PCI loans 1,650,971 1,299,913 PCI loans Construction and land development $ 81 $ 78 Commercial real estate: Nonfarm, nonresidential 576 1,460 Other — — Residential real estate: Closed-end 1-4 family 497 562 Other — 1 Commercial and industrial 1,933 1,812 Consumer and other — — Total PCI loans 3,087 3,913 Allowance for loan losses (15,590 ) (11,587 ) Total loans, net of allowance for loan losses $ 1,638,468 $ 1,292,239
Activity in Allowance for Loan Losses by Portfolio Segment	The following table presents the activity in the allowance for loan losses by portfolio segment for the three month periods ended September 30, 2016 and 2015: Construction Commercial Residential Commercial Consumer Total Three Months Ended September 30, 2016 Allowance for loan losses: Beginning balance $ 3,624 $ 3,865 $ 2,060 $ 4,655 $ 49 $ 14,253 Provision for loan losses 427 43 451 455 16 1,392 Loans charged-off (11 ) — (40 ) — (19 ) (70 ) Recoveries — — 13 — 2 15 Total ending allowance balance $ 4,040 $ 3,908 $ 2,484 $ 5,110 $ 48 $ 15,590 Three Months Ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Provision for loan losses 461 135 (71 ) 1,253 (54 ) 1,724 Loans charged-off — — (15 ) (15 ) (33 ) (63 ) Recoveries — — 6 — 61 67 Total ending allowance balance $ 3,028 $ 2,456 $ 1,659 $ 2,562 $ 39 $ 9,744 The following table presents the activity in the allowance for loan losses by portfolio segment for the nine-month periods ended September 30, 2016 and 2015: Construction Commercial Residential Commercial Consumer Total Nine Months Ended September 30, 2016 Allowance for loan losses: Beginning balance $ 3,186 $ 3,146 $ 1,861 $ 3,358 $ 36 $ 11,587 Provision for loan losses 865 762 609 1,817 42 4,095 Loans charged-off (11 ) — (39 ) (65 ) (35 ) (150 ) Recoveries — — 53 — 5 58 Total ending allowance balance $ 4,040 $ 3,908 $ 2,484 $ 5,110 $ 48 $ 15,590 Nine Months Ended September 30, 2015 Allowance for loan losses: Beginning balance $ 2,690 $ 1,494 $ 1,791 $ 650 $ 55 $ 6,680 Provision for loan losses $ 338 962 (114 ) 1,927 41 3,154 Loans charged-off — — (32 ) (15 ) (121 ) (168 ) Recoveries — — 14 — 64 78 Total ending allowance balance $ 3,028 $ 2,456 $ 1,659 $ 2,562 $ 39 $ 9,744
Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2016 and December 31, 2015. For purposes of this disclosure, recorded investment in loans excludes accrued interest receivable and deferred loan fees, net due to immateriality. Construction Commercial Residential Commercial Consumer Total September 30, 2016 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 115 $ — $ 115 Collectively evaluated for impairment 4,040 3,908 2,484 4,995 48 15,475 Purchased credit-impaired loans — — — — — — Total ending allowance balance $ 4,040 $ 3,908 $ 2,484 $ 5,110 $ 48 $ 15,590 Loans: Individually evaluated for impairment $ — $ 835 $ 1,070 $ 509 $ — $ 2,414 Collectively evaluated for impairment 474,255 429,413 369,976 372,275 3,458 1,649,377 Purchased credit-impaired loans 81 576 497 1,933 — 3,087 Total ending loans balance $ 474,336 $ 430,824 $ 371,543 $ 374,717 $ 3,458 $ 1,654,878 December 31, 2015 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 113 $ — $ 113 Construction Commercial Residential Commercial Consumer Total Collectively evaluated for impairment 3,186 3,137 1,861 3,245 36 11,465 Purchased credit-impaired loans — 9 — — — 9 Total ending allowance balance $ 3,186 $ 3,146 $ 1,861 $ 3,358 $ 36 $ 11,587 Loans: Individually evaluated for impairment $ 1,943 $ 908 $ 1,185 $ 134 $ — $ 4,170 Collectively evaluated for impairment 370,824 363,315 273,749 283,754 6,577 1,298,219 Purchased credit-impaired loans 78 1,460 563 1,812 — 3,913 Total ending loans balance $ 372,845 $ 365,683 $ 275,497 $ 285,700 $ 6,577 $ 1,306,302
Summary of Impaired Loans by Class of Loans	The following table presents information related to impaired loans by class of loans as of September 30, 2016 and December 31, 2015: Unpaid * Recorded Allowance for September 30, 2016 With no allowance recorded: Commercial real estate: Nonfarm, nonresidential $ 2,421 $ 835 $ — Residential real estate: Closed-end 1-4 family 238 238 — Other 832 832 — Commercial and industrial 19 19 — Consumer and other — — — Subtotal 3,510 1,924 — With an allowance recorded: Commercial and industrial 490 490 115 Subtotal 490 490 115 Total $ 4,000 $ 2,414 $ 115 December 31, 2015 With no allowance recorded: Construction and land development $ 1,943 $ 1,943 $ — Commercial real estate: Nonfarm, nonresidential 2,495 908 — Residential real estate: Closed-end 1-4 family 476 476 — Other 709 709 — Commercial and industrial 21 21 — Subtotal 5,644 4,057 — With an allowance recorded: Commercial and industrial 113 113 113 Subtotal 113 113 113 Total $ 5,757 $ 4,170 $ 113 * The following table presents the average recorded investment of impaired loans by class of loans for the three months ended September 30, 2016 and 2015: Three Months Ended September 30, Nine Months Ended September 30, Average Recorded Investment 2016 2015 2016 2015 With no allowance recorded: Construction and land development $ — $ — $ 340 $ — Commercial real estate: Nonfarm, nonresidential 1,427 918 1,307 873 Residential real estate: Closed-end 1-4 family 451 33 533 188 Other 837 712 768 317 Commercial and industrial 46 23 110 77 Consumer and other — 25 10 8 Subtotal 2,761 1,711 3,068 1,463 With an allowance recorded: Commercial and industrial $ 490 $ 90 $ 247 $ 50 Residential real estate: Closed-end 1-4 family 70 — 23 — Consumer and other — 16 — 10 Subtotal 560 106 270 60 Total $ 3,321 $ 1,817 $ 3,338 $ 1,523
Schedule of Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days on Accrual by Class of Loans	The following table presents the recorded investment in nonaccrual and loans past due over 90 days still on accrual by class of loans as of September 30, 2016 and December 31, 2015: Nonaccrual Loans Past Due September 30, 2016 Construction and land development $ — $ 149 Commercial real estate: Nonfarm, nonresidential 835 — Residential real estate: Other 123 — Commercial and industrial 490 — Total $ 1,448 $ 149 December 31, 2015 Construction and land development $ — $ 1,943 Commercial real estate: Nonfarm, nonresidential 835 — Residential real estate: Closed-end 1-4 family 41 435 Commercial and industrial 32 — Total $ 908 $ 2,378
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: 30-59 60-89 Greater Total Loans PCI Total September 30, 2016 Construction and land development $ 1,950 $ — $ 149 $ 2,099 $ 472,156 $ 81 $ 474,336 Commercial real estate: Nonfarm, nonresidential 79 — 835 914 402,468 576 403,958 Other — — — — 26,866 — 26,866 Residential real estate: Closed-end 1-4 family 11 — — 11 228,661 497 229,169 Other 714 — 123 837 141,537 — 142,374 Commercial and industrial 521 875 490 1,886 370,898 1,933 374,717 Consumer and other — — — — 3,458 — 3,458 $ 3,275 $ 875 $ 1,597 $ 5,747 $ 1,646,044 $ 3,087 $ 1,654,878 30-59 60-89 Greater Total Loans PCI Total December 31, 2015 Construction and land development $ — $ 149 $ 1,943 $ 2,092 $ 370,675 $ 78 $ 372,845 Commercial real estate: Nonfarm, nonresidential 258 — 835 1,093 352,175 1,460 354,728 Other — — — — 10,955 — 10,955 Residential real estate: Closed-end 1-4 family 213 — 476 689 162,244 562 163,495 Other 30 — — 30 111,971 1 112,002 Commercial and industrial 86 32 — 118 283,770 1,812 285,700 Consumer and other 2 — — 2 6,575 — 6,577 $ 589 $ 181 $ 3,254 $ 4,024 $ 1,298,365 $ 3,913 $ 1,306,302
Summary of Risk Category of Loans by Class of Loans	Based on the most recent analysis performed, the risk category of loans by class of loans is as follows as of September 30, 2016 and December 31, 2015: Pass Special Substandard Total September 30, 2016 Construction and land development $ 472,980 $ — $ 1,356 $ 474,336 Commercial real estate: Nonfarm, nonresidential 395,852 1,791 6,315 403,958 Other 26,866 — — 26,866 Residential real estate: Closed-end 1-4 family 228,144 — 1,025 229,169 Other 141,305 — 1,069 142,374 Commercial and industrial 368,860 — 5,857 374,717 Consumer and other 3,458 — — 3,458 $ 1,637,465 $ 1,791 $ 15,622 $ 1,654,878 Pass Special Substandard Total December 31, 2015 Construction and land development $ 370,824 $ — $ 2,021 $ 372,845 Commercial real estate: Nonfarm, nonresidential 352,451 — 2,277 354,728 Other 10,955 — — 10,955 Residential real estate: 1-4 family 162,160 — 1,335 163,495 Other 111,292 — 710 112,002 Commercial and industrial 284,144 — 1,556 285,700 Consumer and other 6,577 — — 6,577 $ 1,298,403 $ — $ 7,899 $ 1,306,302
Summary of Total Contractually Required Principal and Interest Cash Payments, Management's Estimate of Expected Total Cash Payments and Carrying Value of Purchased Credit-Impaired ("PCI") Loans	The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans as of September 30, 2016 and December 31, 2015. Sept 30, 2016 Dec 31, 2015 Contractually required principal and interest $ 4,276 $ 5,618 Non-accretable difference (321 ) (352 ) Cash flows expected to be collected 3,955 5,266 Accretable yield (868 ) (1,353 ) Carrying value of acquired loans 3,087 3,913 Allowance for loan losses — (9 ) Carrying value less allowance for loan losses $ 3,087 $ 3,904
Summary of Changes in Total Contractually Required Principal and Interest Cash Payments, Managements Estimate of Expected Total Cash Payments and Carrying Value of Loans	The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three-month periods ended September 30, 2016 and 2015. Activity during the three month period ended September 30, 2016 Jun 30, 2016 Effect of Income All other Sep 30, 2016 Contractually required principal and interest $ 4,462 $ — $ — $ (186 ) $ 4,276 Non-accretable difference (319 ) — — (2 ) (321 ) Cash flows expected to be collected 4,143 — — (188 ) 3,955 Accretable yield (1,067 ) — 115 84 (868 ) Carrying value of acquired loans $ 3,076 $ — $ 115 $ (104 ) $ 3,087 Activity during the three month period ended September 30, 2015 Jun 30, 2015 Effect of Income All other Sep 30, 2015 Contractually required principal and interest $ 6,000 $ — $ — $ (128 ) $ 5,872 Non-accretable difference (973 ) — 839 (173 ) (307 ) Cash flows expected to be collected 5,027 — 839 (301 ) 5,565 Accretable yield (749 ) — 447 (1,350 ) (1,652 ) Carrying value of acquired loans $ 4,278 $ — $ 1,286 $ (1,651 ) $ 3,913 The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the nine-month periods ended September 30, 2016 and 2015. Activity during the nine month period ended September 30, 2016 Dec 31, 2015 Effect of Income All other Sep 30, 2016 Contractually required principal and interest $ 5,618 $ — $ — $ (1,342 ) $ 4,276 Non-accretable difference (352 ) — — 31 (321 ) Cash flows expected to be collected 5,266 — — (1,311 ) 3,955 Accretable yield (1,353 ) — 444 41 (868 ) Carrying value of acquired loans $ 3,913 $ — $ 444 $ (1,270 ) $ 3,087 Activity during the nine month period ended September 30, 2015 Dec 31, 2014 Effect of Income All other Sep 30, 2015 Contractually required principal and interest $ 6,532 $ — $ — $ (660 ) $ 5,872 Non-accretable difference (1,270 ) — 839 124 (307 ) Cash flows expected to be collected 5,262 — 839 (536 ) 5,565 Accretable yield (947 ) — 637 (1,342 ) (1,652 ) Carrying value of acquired loans $ 4,315 $ — $ 1,476 $ (1,878 ) $ 3,913

Loan Servicing (Tables)

Loan Servicing (Tables)	9 Months Ended
	Sep. 30, 2016
Text Block [Abstract]
Schedule of Loans Serviced Not Reported as Assets	Loans serviced for others are not reported as assets. The principal balances of these loans at September 30, 2016 and December 31, 2015 are as follows: September 30, December 31, Loan portfolios serviced for: Federal Home Loan Mortgage Corporation $ 491,466 $ 463,952 Other 3,249 4,037
Components of Net Loan Servicing Fees	The components of net loan servicing fees for the three and nine months ended September 30, 2016 and 2015 were as follows: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Loan servicing fees, net: Loan servicing fees $ 309 $ 287 $ 903 $ 831 Amortization of loan servicing fees (349 ) (203 ) (905 ) (644 ) Change in impairment — — — — Total $ (40 ) $ 84 $ (2 ) $ 187

Securities Sold Under Agreeme21

Securities Sold Under Agreement to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2016
Brokers and Dealers [Abstract]
Additional Details of Securities Sold under Agreement to Repurchase	The following table provides additional details as of September 30, 2016: As of September 30, 2016 U.S. Mortgage- State and Total Fair value of securities pledged $ 210 $ 59 $ 40,565 $ 40,834 Borrowings related to pledged amounts $ — $ — $ 37,343 $ 37,343 Fair value pledged as a % of borrowings — % — % 109 % 109 %

Share-Based Payments (Tables)

Share-Based Payments (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Warrant Activity	A summary of the stock warrant activity for the nine months ended September 30, 2016 and 2015 follows: September 30, September 30, Stock warrants exercised: Intrinsic value of warrants exercised $ 136 $ 46 Cash received from warrants exercised 79 60
Fair Value Assumptions of Stock Options	The fair value of options granted was determined using the following weighted-average assumptions as of grant date. September 30, September 30, Risk-free interest rate 1.60 % 1.84 % Expected term 7.5 years 7.5 years Expected stock price volatility 30.09 % 25.00 % Dividend yield 0.24 % 0.22 %
Summary of Company's Stock Option Activities	A summary of the activity in the stock option plans for the nine months ended September 30, 2016 follows: Shares Weighted Weighted Aggregate Outstanding at beginning of year 1,312,791 $ 13.04 6.23 $ 24,070 Granted 272,087 27.99 Exercised (167,899 ) 11.27 Forfeited, expired, or cancelled (2,415 ) 19.43 Outstanding at period end 1,414,564 $ 16.12 6.49 $ 30,103 Vested or expected to vest 1,343,836 $ 16.12 6.49 $ 28,598 Exercisable at period end 784,022 $ 11.53 4.83 $ 20,282
Summary of Stock Options Exercised	For the nine months 2016 2015 Stock options exercised: Intrinsic value of options exercised $ 3,463 $ 839 Cash received from options exercised 1,357 780 Tax benefit realized from option exercises 522 147
Summary of Activity for Nonvested Restricted Share Awards	A summary of activity for non-vested restricted share awards for the nine months ended September 30, 2016 is as follows: Non-vested Shares Shares Weighted-Average Grant-Date Non-vested at December 31, 2015 105,864 $ 15.89 Granted 36,396 28.45 Vested (32,607 ) 16.70 Forfeited (1,916 ) 16.00 Non-vested at September 30, 2016 107,737 $ 18.80

Regulatory Capital Matters (Tab

Regulatory Capital Matters (Tables)	9 Months Ended
	Sep. 30, 2016
Banking and Thrift [Abstract]
Actual and Required Capital Amounts and Ratios	Actual and required capital amounts and ratios are presented below as of September 30, 2016 and December 31, 2015 for the Company and Bank: Actual Required (1) To Be Well Amount Ratio Amount Ratio Amount Ratio September 30, 2016 Company common equity Tier 1 capital to risk-weighted assets $ 188,225 9.09 % $ 93,188 4.50 % N/A N/A Company Total Capital to risk weighted assets $ 262,107 12.66 % $ 165,667 8.00 % N/A N/A Company Tier 1 (Core) Capital to risk weighted assets $ 188,225 9.09 % $ 124,250 6.00 % N/A N/A Company Tier 1 (Core) Capital to average assets $ 188,225 7.15 % $ 105,361 4.00 % N/A N/A Bank common equity Tier 1 capital to risk-weighted assets $ 243,995 11.77 % $ 93,314 4.50 % $ 134,787 6.50 % Bank Total Capital to risk weighted assets $ 259,585 12.52 % $ 165,892 8.00 % $ 207,365 10.00 % Bank Tier 1 (Core) Capital to risk weighted assets $ 243,995 11.77 % $ 124,419 6.00 % $ 165,892 8.00 % Bank Tier 1 (Core) Capital to average assets $ 243,995 9.26 % $ 105,343 4.00 % $ 131,678 5.00 % December 31, 2015 Company common equity Tier 1 capital to risk-weighted assets $ 167,562 10.08 % $ 74,768 4.50 % N/A N/A Company Total Capital to risk weighted assets $ 186,243 11.21 % $ 132,922 8.00 % N/A N/A Company Tier 1 (Core) Capital to risk weighted assets $ 174,656 10.51 % $ 99,691 6.00 % N/A N/A Company Tier 1 (Core) Capital to average assets $ 174,656 8.48 % $ 82,362 4.00 % N/A N/A Bank common equity Tier 1 capital to risk-weighted assets $ 172,205 10.36 % $ 74,772 4.50 % $ 108,004 6.50 % Bank Total Capital to risk weighted assets $ 183,792 11.06 % $ 132,928 8.00 % $ 166,160 10.00 % Bank Tier 1 (Core) Capital to risk weighted assets $ 172,205 10.36 % $ 99,696 6.00 % $ 132,928 8.00 % Bank Tier 1 (Core) Capital to average assets $ 172,205 8.36 % $ 82,357 4.00 % $ 102,946 5.00 %

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis, including financial assets and liabilities for which the Company has elected the fair value option, are summarized below: Fair Value Measurements at Quoted Prices Significant Significant Financial Assets Securities available for sale U.S. government sponsored entities and agencies $ — $ 3,138 $ — Mortgage-backed securities-residential — 556,797 — Mortgage-backed securities-commercial — 19,759 — State and political subdivisions — 91,062 — Total securities available for sale $ — $ 670,056 $ — Loans held for sale $ — $ 26,819 $ — Mortgage banking derivatives $ — $ 858 $ — Financial Liabilities Mortgage banking derivatives $ — $ 87 $ — Fair Value Measurements at Quoted Prices Significant Significant Financial Assets Securities available for sale U.S. government sponsored entities and agencies $ — $ 6,817 $ — Mortgage-backed securities-residential — 500,955 — Mortgage-backed securities-commercial — 19,835 — State and political subdivisions — 48,231 — Total securities available for sale $ — $ 575,838 $ — Loans held for sale $ — $ 14,079 $ — Mortgage banking derivatives $ — $ 411 $ — Financial Liabilities Mortgage banking derivatives $ — $ 29 $ —
Carrying Amount and Estimated Fair Value of Financial Instruments	The carrying amounts and estimated fair values of financial instruments, at September 30, 2016 and December 31, 2015 are as follows: Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 55,749 $ 55,749 $ — $ — $ 55,749 Certificates of deposit held at other financial institutions 1,055 — 1,055 — 1,055 Securities available for sale 670,756 — 670,756 — 670,756 Securities held to maturity 235,050 — 243,946 — 243,946 Loans held for sale 26,819 — 26,819 — 26,819 Net loans 1,638,468 — — 1,621,695 1,621,695 Restricted equity securities 11,829 n/a n/a n/a n/a Servicing rights, net 3,566 — 3,948 — 3,948 Accrued interest receivable 7,871 — 3,634 4,237 7,871 Financial liabilities Deposits $ 2,217,954 $ 1,223,120 $ 996,482 $ — $ 2,219,602 Federal funds purchased and repurchase agreements 45,843 — 45,843 — 45,843 Federal Home Loan Bank advances 162,000 — 162,024 — 162,024 Subordinated notes, net 58,292 — — 61,867 61,867 Accrued interest payable 1,399 123 915 361 1,399 Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 52,394 $ 52,394 $ — $ — $ 52,394 Certificates of deposit held at other financial institutions 250 — 250 — 250 Securities available for sale 575,838 — 575,838 — 575,838 Securities held to maturity 158,200 — 161,969 — 161,969 Loans held for sale 14,079 — 14,079 — 14,079 Net loans 1,292,239 — — 1,279,849 1,279,849 Restricted equity securities 7,998 n/a n/a n/a n/a Servicing rights, net 3,455 — 4,635 — 4,635 Accrued interest receivable 7,299 3 3,780 3,516 7,299 Financial liabilities Deposits $ 1,814,039 $ 1,062,587 $ 748,961 $ — $ 1,811,548 Federal funds purchased and repurchase agreements 101,086 — 101,086 — 101,086 Federal Home Loan Bank advances 57,000 — 56,931 — 56,931 Accrued interest payable 644 100 544 — 644

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Computation of Earnings per Share	The factors used in the earnings per share computation follow: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Basic Net income available to common shareholders $ 7,030 $ 5,125 $ 20,239 $ 11,341 Less: earnings allocated to participating securities (69 ) (52 ) (213 ) (127 ) Net income allocated to common shareholders $ 6,961 $ 5,073 $ 20,026 $ 11,214 Weighted average common shares outstanding including participating securities 10,721,253 10,516,290 10,652,223 9,668,497 Less: Participating securities (105,343 ) (107,502 ) (111,937 ) (108,617 ) Average shares 10,615,910 10,408,788 10,540,286 9,559,880 Basic earnings per common share $ 0.66 $ 0.49 $ 1.90 $ 1.17 Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Diluted Net income allocated to common shareholders $ 6,961 $ 5,073 $ 20,026 $ 11,214 Weighted average common shares outstanding for basic earnings per common share 10,615,910 10,408,788 10,540,286 9,559,880 Add: Dilutive effects of assumed exercises of stock options 612,955 534,148 585,326 466,955 Add: Dilutive effects of assumed exercises of stock warrants 13,370 13,265 12,937 13,257 Average shares and dilutive potential common shares 11,242,235 10,956,201 11,138,549 10,040,092 Dilutive earnings per common share $ 0.62 $ 0.46 $ 1.80 $ 1.12

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 658,907	$ 576,365
Gross Unrealized Gains	12,537	4,050
Gross Unrealized Losses	(688)	(4,577)
Fair Value	670,756	575,838
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,000	6,792
Gross Unrealized Gains	138	72
Gross Unrealized Losses		(47)
Fair Value	3,138	6,817
Mortgage-Backed Securities: Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	546,805	502,916
Gross Unrealized Gains	10,346	2,386
Gross Unrealized Losses	(354)	(4,347)
Fair Value	556,797	500,955
Mortgage-Backed Securities: Commercial [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	19,526	19,993
Gross Unrealized Gains	233	22
Gross Unrealized Losses		(180)
Fair Value	19,759	19,835
State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	89,576	46,664
Gross Unrealized Gains	1,820	1,570
Gross Unrealized Losses	(334)	(3)
Fair Value	$ 91,062	$ 48,231

Securities - Schedule of Amorti

Securities - Schedule of Amortized Cost and Fair Value of Securities Held to Maturity Portfolio (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 235,050	$ 158,200
Gross Unrecognized Gains	9,020	4,262
Gross Unrecognized Losses	(124)	(493)
Fair Value	243,946	161,969
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	203	3,300
Gross Unrecognized Gains	7	11
Gross Unrecognized Losses		(72)
Fair Value	210	3,239
Mortgage-Backed Securities: Residential [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	112,071	30,398
Gross Unrecognized Gains	1,014	410
Gross Unrecognized Losses	(124)	(408)
Fair Value	112,961	30,400
State and Political Subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	122,776	124,502
Gross Unrecognized Gains	7,999	3,841
Gross Unrecognized Losses		(13)
Fair Value	$ 130,775	$ 128,330

Securities - Summary of Proceed

Securities - Summary of Proceeds from Sales and Calls of Securities Available for Sale and Associated Gains and Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Available-for-sale Securities [Abstract]
Proceeds	$ 11,939	$ 19,776	$ 74,203	$ 54,064
Gross gains	$ 430	95	1,920	485
Gross losses		$ (90)	$ (385)	$ (105)

Securities - Summary of Proce29

Securities - Summary of Proceeds from Calls of Securities Held to Maturity Called at Price In Excess of Par Value and Associated Gains (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Held-to-maturity Securities [Abstract]
Proceeds				$ 2,300
Gross gains				149
Gross losses	$ 0	$ 0	$ 0	$ 0

Securities - Schedule of Amor30

Securities - Schedule of Amortized Cost and Fair Value of Investment Securities Portfolio by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available for sale
Amortized Cost, Over one year through five years	$ 3,000
Amortized Cost, Over ten years	89,576
Amortized Cost	658,907	$ 576,365
Held to maturity
Amortized Cost, Over one year through five years	706
Amortized Cost, Over five years through ten years	5,073
Amortized Cost, Over ten years	117,200
Amortized Cost, Mortgage-backed securities: residential	112,071
Amortized Cost	235,050	158,200
Available for sale
Fair Value, Over one year through five years	3,138
Fair Value, Over ten years	91,062
Mortgage-backed securities: residential	556,797
Mortgage-backed securities: commercial	19,759
Fair Value, Total	670,756	575,838
Held to maturity
Fair Value, Over one year through five years	750
Fair Value, Over five years through ten years	5,351
Fair Value, Over ten years	124,884
Fair Value, Mortgage-backed securities: residential	112,961
Fair Value, Total	243,946	161,969
Mortgage-Backed Securities: Commercial [Member]
Available for sale
Mortgage-backed securities:	19,526
Amortized Cost	19,526	19,993
Available for sale
Fair Value, Total	19,759	19,835
Mortgage-Backed Securities: Residential [Member]
Available for sale
Mortgage-backed securities:	546,805
Amortized Cost	546,805	502,916
Held to maturity
Amortized Cost	112,071	30,398
Available for sale
Fair Value, Total	556,797	500,955
Held to maturity
Fair Value, Total	$ 112,961	$ 30,400

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	Sep. 30, 2016USD ($)Securities	Dec. 31, 2015USD ($)Securities
Marketable Securities [Line Items]
Carrying value of pledged securities | $	$ 742,828	$ 595,524
Other than US Government Sponsored Entities and Agencies [Member]
Marketable Securities [Line Items]
Amount of holdings of securities of any one issuer | Securities	0	0

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Losses and Fair Value by Major Security Type (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Schedule Of Held To Maturity And Available For Sale Securities [Line Items]
Less Than 12 Months Available for Sale Fair Value	$ 79,899	$ 332,969
Less Than 12 Months Available for sale Unrealized Losses	(603)	(3,921)
12 Months or Longer Available for sale Fair Value	13,659	23,319
12 Months or Longer Available for sale Unrealized Losses	(85)	(656)
Available for sale Fair Value, Total	93,558	356,288
Available for sale Unrealized Losses, Total	(688)	(4,577)
Less Than 12 Months Held to maturity Fair Value	19,200	15,096
Less Than 12 Months Held to maturity Unrealized Losses	(54)	(153)
12 Months or Longer Held to maturity Fair Value	3,826	6,452
12 Months or Longer Held to maturity Unrealized Losses	(70)	(340)
Held to maturity Fair Value, Total	23,026	21,548
Held to maturity Unrealized Losses, Total	(124)	(493)
U.S. Government Sponsored Entities and Agencies [Member]
Schedule Of Held To Maturity And Available For Sale Securities [Line Items]
Less Than 12 Months Available for Sale Fair Value		2,703
Less Than 12 Months Available for sale Unrealized Losses		(47)
Available for sale Fair Value, Total		2,703
Available for sale Unrealized Losses, Total		(47)
Less Than 12 Months Held to maturity Fair Value		1,957
Less Than 12 Months Held to maturity Unrealized Losses		(43)
12 Months or Longer Held to maturity Fair Value		971
12 Months or Longer Held to maturity Unrealized Losses		(29)
Held to maturity Fair Value, Total		2,928
Held to maturity Unrealized Losses, Total		(72)
Mortgage-Backed Securities: Residential [Member]
Schedule Of Held To Maturity And Available For Sale Securities [Line Items]
Less Than 12 Months Available for Sale Fair Value	36,585	313,570
Less Than 12 Months Available for sale Unrealized Losses	(269)	(3,691)
12 Months or Longer Available for sale Fair Value	13,659	23,319
12 Months or Longer Available for sale Unrealized Losses	(85)	(656)
Available for sale Fair Value, Total	50,244	336,889
Available for sale Unrealized Losses, Total	(354)	(4,347)
Less Than 12 Months Held to maturity Fair Value	19,200	9,788
Less Than 12 Months Held to maturity Unrealized Losses	(54)	(97)
12 Months or Longer Held to maturity Fair Value	3,826	5,481
12 Months or Longer Held to maturity Unrealized Losses	(70)	(311)
Held to maturity Fair Value, Total	23,026	15,269
Held to maturity Unrealized Losses, Total	(124)	(408)
Mortgage-Backed Securities: Commercial [Member]
Schedule Of Held To Maturity And Available For Sale Securities [Line Items]
Less Than 12 Months Available for Sale Fair Value		15,980
Less Than 12 Months Available for sale Unrealized Losses		(180)
Available for sale Fair Value, Total		15,980
Available for sale Unrealized Losses, Total		(180)
State and Political Subdivisions [Member]
Schedule Of Held To Maturity And Available For Sale Securities [Line Items]
Less Than 12 Months Available for Sale Fair Value	43,314	716
Less Than 12 Months Available for sale Unrealized Losses	(334)	(3)
Available for sale Fair Value, Total	43,314	716
Available for sale Unrealized Losses, Total	$ (334)	(3)
Less Than 12 Months Held to maturity Fair Value		3,351
Less Than 12 Months Held to maturity Unrealized Losses		(13)
Held to maturity Fair Value, Total		3,351
Held to maturity Unrealized Losses, Total		$ (13)

Loans - Summary of Loans (Detai

Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,651,791		$ 1,302,389
Deferred loan fees, net	(820)		(2,476)
Total loans that are not PCI loans	1,650,971		1,299,913
Allowance for loan losses	(15,590)	$ (14,253)	(11,587)	$ (9,744)	$ (8,016)	$ (6,680)
Net loans	1,638,468		1,292,239
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Construction and land development	474,255		372,767
Allowance for loan losses	(4,040)	(3,624)	(3,186)	(3,028)	(2,567)	(2,690)
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	372,784		283,888
Allowance for loan losses	(5,110)	(4,655)	(3,358)	(2,562)	(1,324)	(650)
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer and other	3,458		6,577
Allowance for loan losses	(48)	$ (49)	(36)	$ (39)	$ (65)	$ (55)
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,087		3,913
PCI Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	81		78
PCI Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,933		1,812
Commercial Real Estate Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonfarm, nonresidential	403,382		353,268
Commercial Real Estate Financing Receivable [Member] | PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	576		1,460
Commercial Real Estate, Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other	26,866		10,955
Real Estate Residential Closed-end 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Closed-end 1-4 family	228,672		162,933
Real Estate Residential Closed-end 1-4 Family [Member] | PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	497		562
Residential Real Estate, Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other	$ 142,374		112,001
Residential Real Estate, Other [Member] | PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans			$ 1

Loans - Activity in Allowance f

Loans - Activity in Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 14,253	$ 8,016	$ 11,587	$ 6,680
Provision for loan losses	1,392	1,724	4,095	3,154
Loans charged-off	(70)	(63)	(150)	(168)
Recoveries	15	67	58	78
Total ending allowance balance	15,590	9,744	15,590	9,744
Construction and Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,624	2,567	3,186	2,690
Provision for loan losses	427	461	865	338
Loans charged-off	(11)		(11)
Total ending allowance balance	4,040	3,028	4,040	3,028
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	3,865	2,321	3,146	1,494
Provision for loan losses	43	135	762	962
Total ending allowance balance	3,908	2,456	3,908	2,456
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,060	1,739	1,861	1,791
Provision for loan losses	451	(71)	609	(114)
Loans charged-off	(40)	(15)	(39)	(32)
Recoveries	13	6	53	14
Total ending allowance balance	2,484	1,659	2,484	1,659
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4,655	1,324	3,358	650
Provision for loan losses	455	1,253	1,817	1,927
Loans charged-off		(15)	(65)	(15)
Total ending allowance balance	5,110	2,562	5,110	2,562
Consumer and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	49	65	36	55
Provision for loan losses	16	(54)	42	41
Loans charged-off	(19)	(33)	(35)	(121)
Recoveries	2	61	5	64
Total ending allowance balance	$ 48	$ 39	$ 48	$ 39

Loans - Allowance for Loan Loss

Loans - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Individually evaluated for impairment	$ 115		$ 113
Allowance for loan losses, Collectively evaluated for impairment	15,475		11,465
Total ending allowance balance	15,590	$ 14,253	11,587	$ 9,744	$ 8,016	$ 6,680
Loans, Individually evaluated for impairment	2,414		4,170
Loans, Collectively evaluated for impairment	1,649,377		1,298,219
Aging of Recorded Investment, Total	1,654,878		1,306,302
PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans			9
Purchased credit-impaired loans	3,087		3,913
Construction and Land Development [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	4,040		3,186
Total ending allowance balance	4,040	3,624	3,186	3,028	2,567	2,690
Loans, Individually evaluated for impairment			1,943
Loans, Collectively evaluated for impairment	474,255		370,824
Aging of Recorded Investment, Total	474,336		372,845
Construction and Land Development [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	81		78
Commercial Real Estate [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	3,908		3,137
Total ending allowance balance	3,908	3,865	3,146	2,456	2,321	1,494
Loans, Individually evaluated for impairment	835		908
Loans, Collectively evaluated for impairment	429,413		363,315
Aging of Recorded Investment, Total	430,824		365,683
Commercial Real Estate [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans			9
Purchased credit-impaired loans	576		1,460
Residential Real Estate [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	2,484		1,861
Total ending allowance balance	2,484	2,060	1,861	1,659	1,739	1,791
Loans, Individually evaluated for impairment	1,070		1,185
Loans, Collectively evaluated for impairment	369,976		273,749
Aging of Recorded Investment, Total	371,543		275,497
Residential Real Estate [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	497		563
Commercial and Industrial [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Individually evaluated for impairment	115		113
Allowance for loan losses, Collectively evaluated for impairment	4,995		3,245
Total ending allowance balance	5,110	4,655	3,358	2,562	1,324	650
Loans, Individually evaluated for impairment	509		134
Loans, Collectively evaluated for impairment	372,275		283,754
Aging of Recorded Investment, Total	374,717		285,700
Commercial and Industrial [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	1,933		1,812
Consumer and Other [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	48		36
Total ending allowance balance	48	$ 49	36	$ 39	$ 65	$ 55
Loans, Collectively evaluated for impairment	3,458		6,577
Aging of Recorded Investment, Total	$ 3,458		$ 6,577

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($)	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal amount	$ 4,000,000		$ 5,757,000
Allowance for loan losses	15,590,000	$ 14,253,000	11,587,000	$ 9,744,000	$ 8,016,000	$ 6,680,000
Loans receivable carrying amount	1,651,791,000		$ 1,302,389,000
Non PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated credit discount	2,179,000
Unpaid principal amount	84,848,000
Allowance for loan losses	32,000
Loans receivable carrying amount	$ 82,669,000

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans by Class of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	$ 3,510		$ 3,510		$ 5,644
Unpaid Principal Balance	4,000		4,000		5,757
Recorded Investment, With no allowance recorded	1,924		1,924		4,057
Recorded Investment	2,414		2,414		4,170
Unpaid Principal Balance, With an allowance recorded	490		490		113
Recorded Investment, With an allowance recorded	490		490		113
Allowance for Loan Losses Allocated	115		115		113
Average Recorded Investment, With no allowance recorded	2,761	$ 1,711	3,068	$ 1,463
Average Recorded Investment, With an allowance recorded	560	106	270	60
Average Recorded Investment	3,321	1,817	3,338	1,523
Commercial Real Estate Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	2,421		2,421		2,495
Recorded Investment, With no allowance recorded	835		835		908
Average Recorded Investment, With no allowance recorded	1,427	918	1,307	873
Real Estate Residential Closed-end 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	238		238		476
Recorded Investment, With no allowance recorded	238		238		476
Average Recorded Investment, With no allowance recorded	451	33	533	188
Average Recorded Investment, With an allowance recorded	70		23
Residential Real Estate, Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	832		832		709
Recorded Investment, With no allowance recorded	832		832		709
Average Recorded Investment, With no allowance recorded	837	712	768	317
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, With no allowance recorded		25	10	8
Average Recorded Investment, With an allowance recorded		16		10
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	19		19		21
Recorded Investment, With no allowance recorded	19		19		21
Unpaid Principal Balance, With an allowance recorded	490		490		113
Recorded Investment, With an allowance recorded	490		490		113
Allowance for Loan Losses Allocated	115		115		113
Average Recorded Investment, With no allowance recorded	46	23	110	77
Average Recorded Investment, With an allowance recorded	$ 490	$ 90	247	$ 50
Construction and Land Development [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded					1,943
Recorded Investment, With no allowance recorded					$ 1,943
Average Recorded Investment, With no allowance recorded			$ 340

Loans - Schedule of Recorded In

Loans - Schedule of Recorded Investment in Nonaccrual and Loans Past Due Over 90 Days on Accrual by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Nonaccrual	$ 1,448	$ 908
Recorded Investment, Loans Past Due Over 90 Days	149	2,378
Commercial Real Estate Financing Receivable [Member]
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Nonaccrual	835	835
Real Estate Residential Closed-end 1-4 Family [Member]
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Nonaccrual		41
Recorded Investment, Loans Past Due Over 90 Days		435
Construction and Land Development [Member]
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Loans Past Due Over 90 Days	149	1,943
Residential Real Estate, Other [Member]
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Nonaccrual	123
Commercial and Industrial Financing Receivable [Member]
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Nonaccrual	$ 490	$ 32

Loans - Schedule of Aging of Re

Loans - Schedule of Aging of Recorded Investment in Past Due Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	$ 5,747	$ 4,024
Aging of Recorded Investment, Loans Not Past Due	1,646,044	1,298,365
Aging of Recorded Investment, Total	1,654,878	1,306,302
Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	2,099	2,092
Aging of Recorded Investment, Loans Not Past Due	472,156	370,675
Aging of Recorded Investment, Total	474,336	372,845
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	1,886	118
Aging of Recorded Investment, Loans Not Past Due	370,898	283,770
Aging of Recorded Investment, Total	374,717	285,700
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due		2
Aging of Recorded Investment, Loans Not Past Due	3,458	6,575
Aging of Recorded Investment, Total	3,458	6,577
PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	3,087	3,913
PCI Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	81	78
PCI Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	1,933	1,812
Commercial Real Estate Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	914	1,093
Aging of Recorded Investment, Loans Not Past Due	402,468	352,175
Aging of Recorded Investment, Total	403,958	354,728
Commercial Real Estate Financing Receivable [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	576	1,460
Commercial Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Loans Not Past Due	26,866	10,955
Aging of Recorded Investment, Total	26,866	10,955
Real Estate Residential Closed-end 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	11	689
Aging of Recorded Investment, Loans Not Past Due	228,661	162,244
Aging of Recorded Investment, Total	229,169	163,495
Real Estate Residential Closed-end 1-4 Family [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	497	562
Residential Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	837	30
Aging of Recorded Investment, Loans Not Past Due	141,537	111,971
Aging of Recorded Investment, Total	142,374	112,002
Residential Real Estate, Other [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans		1
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	3,275	589
30 to 59 Days Past Due [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	1,950
30 to 59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	521	86
30 to 59 Days Past Due [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due		2
30 to 59 Days Past Due [Member] | Commercial Real Estate Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	79	258
30 to 59 Days Past Due [Member] | Real Estate Residential Closed-end 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	11	213
30 to 59 Days Past Due [Member] | Residential Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	714	30
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	875	181
60 to 89 Days Past Due [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due		149
60 to 89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	875	32
Greater Than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	1,597	3,254
Greater Than 90 Days Past Due [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	149	1,943
Greater Than 90 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	490
Greater Than 90 Days Past Due [Member] | Commercial Real Estate Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	835	835
Greater Than 90 Days Past Due [Member] | Real Estate Residential Closed-end 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due		$ 476
Greater Than 90 Days Past Due [Member] | Residential Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	$ 123

Loans - Summary of Risk Categor

Loans - Summary of Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Risk Category Of Loans [Line Items]
Total Loans	$ 1,654,878	$ 1,306,302
Construction and Land Development [Member]
Risk Category Of Loans [Line Items]
Total Loans	474,336	372,845
Commercial and Industrial [Member]
Risk Category Of Loans [Line Items]
Total Loans	374,717	285,700
Consumer and Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	3,458	6,577
Commercial Real Estate Financing Receivable [Member]
Risk Category Of Loans [Line Items]
Total Loans	403,958	354,728
Commercial Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	26,866	10,955
Real Estate Residential Closed-end 1-4 Family [Member]
Risk Category Of Loans [Line Items]
Total Loans	229,169	163,495
Residential Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	142,374	112,002
Pass [Member]
Risk Category Of Loans [Line Items]
Total Loans	1,637,465	1,298,403
Pass [Member] | Construction and Land Development [Member]
Risk Category Of Loans [Line Items]
Total Loans	472,980	370,824
Pass [Member] | Commercial and Industrial [Member]
Risk Category Of Loans [Line Items]
Total Loans	368,860	284,144
Pass [Member] | Consumer and Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	3,458	6,577
Pass [Member] | Commercial Real Estate Financing Receivable [Member]
Risk Category Of Loans [Line Items]
Total Loans	395,852	352,451
Pass [Member] | Commercial Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	26,866	10,955
Pass [Member] | Real Estate Residential Closed-end 1-4 Family [Member]
Risk Category Of Loans [Line Items]
Total Loans	228,144	162,160
Pass [Member] | Residential Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	141,305	111,292
Special Mention [Member]
Risk Category Of Loans [Line Items]
Total Loans	1,791
Special Mention [Member] | Commercial Real Estate Financing Receivable [Member]
Risk Category Of Loans [Line Items]
Total Loans	1,791
Substandard [Member]
Risk Category Of Loans [Line Items]
Total Loans	15,622	7,899
Substandard [Member] | Construction and Land Development [Member]
Risk Category Of Loans [Line Items]
Total Loans	1,356	2,021
Substandard [Member] | Commercial and Industrial [Member]
Risk Category Of Loans [Line Items]
Total Loans	5,857	1,556
Substandard [Member] | Commercial Real Estate Financing Receivable [Member]
Risk Category Of Loans [Line Items]
Total Loans	6,315	2,277
Substandard [Member] | Real Estate Residential Closed-end 1-4 Family [Member]
Risk Category Of Loans [Line Items]
Total Loans	1,025	1,335
Substandard [Member] | Residential Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	$ 1,069	$ 710

Loans -Summary of Total Contrac

Loans -Summary of Total Contractually Required Principal and Interest Cash Payments, Management's Estimate of Expected Total Cash Payments and Carrying Value of Purchased Credit-Impaired ("PCI") Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Receivables [Abstract]
Contractually required principal and interest	$ 4,276	$ 4,462	$ 5,618	$ 5,872	$ 6,000	$ 6,532
Non-accretable difference	(321)	(319)	(352)	(307)	(973)	(1,270)
Cash flows expected to be collected	3,955	4,143	5,266	5,565	5,027	5,262
Accretable yield	(868)	(1,067)	(1,353)	(1,652)	(749)	(947)
Carrying value of acquired loans	3,087	$ 3,076	3,913	$ 3,913	$ 4,278	$ 4,315
Allowance for loan losses			(9)
Carrying value less allowance for loan losses	$ 3,087		$ 3,904

Loans - Summary of Changes in T

Loans - Summary of Changes in Total Contractually Required Principal and Interest Cash Payments, Managements Estimate of Expected Total Cash Payments and Carrying Value of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Receivables [Abstract]
Contractually required principal and interest	$ 4,276	$ 5,872	$ 4,276	$ 5,872	$ 4,462	$ 5,618	$ 6,000	$ 6,532
Non-accretable difference	(321)	(307)	(321)	(307)	(319)	(352)	(973)	(1,270)
Cash flows expected to be collected	3,955	5,565	3,955	5,565	4,143	5,266	5,027	5,262
Accretable yield	(868)	(1,652)	(868)	(1,652)	(1,067)	(1,353)	(749)	(947)
Carrying value of acquired loans	3,087	3,913	3,087	3,913	$ 3,076	$ 3,913	$ 4,278	$ 4,315
Contractually required principal and interest, Effect of Acquisitions	0	0	0	0
Non-accretable difference, Effect of Acquisitions	0	0	0	0
Cash flows expected to be collected, Effect of Acquisitions	0	0	0	0
Accretable yield, Effect of Acquisitions	0	0	0	0
Carrying value of acquired loans, Effect of Acquisitions	0	0	0	0
Contractually required principal and interest, Income Accretion	0	0	0	0
Non-accretable difference, Income Accretion		839		839
Cash flows expected to be collected, Income Accretion		839		839
Accretable yield, Income Accretion	115	447	444	637
Carrying value of acquired loans, Income Accretion	115	1,286	444	1,476
Contractually required principal and interest, All other Adjustments	(186)	(128)	(1,342)	(660)
Non-accretable difference, All other Adjustments	(2)	(173)	31	124
Cash flows expected to be collected, All other Adjustments	(188)	(301)	(1,311)	(536)
Accretable yield, All other Adjustments	84	(1,350)	41	(1,342)
Carrying value of acquired loans, All other Adjustments	$ (104)	$ (1,651)	$ (1,270)	$ (1,878)

Loan Servicing - Schedule of Lo

Loan Servicing - Schedule of Loans Serviced Not Reported as Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Federal Home Loan Mortgage Corporation [Member]
Loans Servicing For Institutional Investors [Line Items]
Loan servicing rights, at fair value	$ 491,466	$ 463,952
Other Serviced Loans [Member]
Loans Servicing For Institutional Investors [Line Items]
Loan servicing rights, at fair value	$ 3,249	$ 4,037

Loan Servicing - Components of

Loan Servicing - Components of Net Loan Servicing Fees (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Transfers and Servicing [Abstract]
Loan servicing fees	$ 309	$ 287	$ 903	$ 831
Amortization of loan servicing fees	(349)	(203)	(905)	(644)
Change in impairment	0	0	0	0
Total	$ (40)	$ 84	$ (2)	$ 187

Loan Servicing - Additional Inf

Loan Servicing - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Transfers and Servicing [Abstract]
Fair value of servicing rights	$ 3,948	$ 4,635
Weighted average discount rate	10.50%	10.50%
Weighted average prepayment speed	14.70%	10.20%

Securities Sold Under Agreeme46

Securities Sold Under Agreement to Repurchase - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Total short-term borrowings	$ 37,343	$ 61,261
Carrying value of securities used to secure borrowings	$ 38,333	$ 73,478

Securities Sold Under Agreeme47

Securities Sold Under Agreement to Repurchase - Additional Details of Securities Sold under Agreement to Repurchase (Detail) $ in Thousands	Sep. 30, 2016USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged	$ 40,834
Borrowings related to pledged amounts	$ 37,343
Fair value pledged as a % of borrowings	109.00%
U.S. Government Sponsored Entities and Agencies [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged	$ 210
Mortgage-Backed Securities: Residential [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged	59
State and Political Subdivisions [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Fair value of securities pledged	40,565
Borrowings related to pledged amounts	$ 37,343
Fair value pledged as a % of borrowings	109.00%

Share-Based Payments - Addition

Share-Based Payments - Additional Information (Detail)	1 Months Ended				3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2015shares	Jun. 30, 2014shares	Apr. 30, 2013shares	Apr. 30, 2010shares	Sep. 30, 2016USD ($)Plans$ / sharesshares	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)Plans$ / sharesshares	Sep. 30, 2015USD ($)$ / sharesshares	Dec. 31, 2007shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrants exercised							6,575	4,970
Trigger value of 2010 warrant, price per share | $ / shares					$ 15		$ 15
Warrants, contingent redemption price | $ / shares					$ 1		$ 1
Number of share-based compensation plans | Plans					2		2
Compensation cost charged against income | $					$ 406,000	$ 248,000	$ 1,201,000	$ 619,000
Excess tax benefit from exercise of stock options | $					$ 107,000	$ 0	$ 522,000	$ 147,000
Number of shares authorized for issuance					2,041,673		2,041,673
Weighted average fair value of options | $ / shares							$ 9.78	$ 6.41
Unrecognized compensation cost, nonvested stock options | $					$ 3,583,000		$ 3,583,000
Unrecognized compensation cost, period of recognition							4 years 1 month 6 days
Total fair value of shares vested | $							$ 974,000	$ 520,000
2010 Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant shares issued					32,425		32,425
Warrant exercise price per share | $ / shares					$ 12		$ 12
Warrants exercisable period							7 years
Warrants outstanding					18,732		18,732
2007 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options authorized									551,250
Increase in shares authorized			1,500,000
Increased number of authorized shares	4,000,000	2,000,000
Options contractual term							10 years
2007 Stock Option Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of shares							3 years
2007 Stock Option Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of shares							5 years
Two Thousand Ten Amended Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options authorized				1,000,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, nonvested stock options | $					$ 1,917,000		$ 1,917,000
Unrecognized compensation cost, period of recognition							3 years 2 months 12 days
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of shares							3 years
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of shares							5 years

Share-Based Payments - Summary

Share-Based Payments - Summary of Stock Warrant Activity (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Intrinsic value of warrants exercised	$ 136	$ 46
Cash received from warrants exercised	$ 79	$ 60

Share-Based Payments - Fair Val

Share-Based Payments - Fair Value Assumptions of Stock Options (Detail)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	1.60%	1.84%
Expected term	7 years 6 months	7 years 6 months
Expected stock price volatility	30.09%	25.00%
Dividend yield	0.24%	0.22%

Share-Based Payments - Summar51

Share-Based Payments - Summary of Company's Stock Option Activities (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares, Outstanding, Beginning Balance	1,312,791
Shares, Granted	272,087
Shares, Exercised	(167,899)
Shares, Forfeited, expired, or canceled	(2,415)
Shares, Outstanding, Ending Balance	1,414,564	1,312,791
Shares, Vested or expected to vest	1,343,836
Shares, Exercisable at period end	784,022
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 13.04
Weighted Average Exercise Price, Granted	27.99
Weighted Average Exercise Price, Exercised	11.27
Weighted Average Exercise Price, Forfeited, expired, or cancelled	19.43
Weighted Average Exercise Price, Outstanding, Ending Balance	16.12	$ 13.04
Weighted Average Exercise Price, Vested or expected to vest	16.12
Weighted Average Exercise Price, Exercisable at period end	$ 11.53
Weighted Average Remaining Contractual Term, beginning of year	6 years 5 months 27 days	6 years 2 months 23 days
Weighted Average Remaining Contractual Term, Vested or expected to vest	6 years 5 months 27 days
Weighted Average Remaining Contractual Term, Exercisable at period end	4 years 9 months 29 days
Aggregate Intrinsic Value, Outstanding, Beginning Balance	$ 30,103	$ 24,070
Aggregate Intrinsic Value, Vested or expected to vest	28,598
Aggregate Intrinsic Value, Exercisable at period end	$ 20,282

Share-Based Payments - Summar52

Share-Based Payments - Summary of Stock Options Exercised (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock options exercised:
Intrinsic value of options exercised			$ 3,463,000	$ 839,000
Cash received from options exercised			1,357,000	780,000
Tax benefit realized from option exercises	$ 107,000	$ 0	$ 522,000	$ 147,000

Share-Based Payments - Summar53

Share-Based Payments - Summary of Activity for Nonvested Restricted Share Awards (Detail) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Nonvested, Beginning Balance | shares	105,864
Shares, Granted | shares	36,396
Shares, Vested | shares	(32,607)
Shares, Forfeited | shares	(1,916)
Shares, Nonvested, Ending Balance | shares	107,737
Weighted-Average Grant-Date Fair Value, Nonvested, Beginning Balance | $ / shares	$ 15.89
Weighted-Average Grant-Date Fair Value, Granted | $ / shares	28.45
Weighted-Average Grant-Date Fair Value, Vested | $ / shares	16.70
Weighted-Average Grant-Date Fair Value, Forfeited | $ / shares	16
Weighted-Average Grant-Date Fair Value, Nonvested, Ending Balance | $ / shares	$ 18.80

Regulatory Capital Matters - Ad

Regulatory Capital Matters - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2016
Banking and Thrift [Abstract]
Capital conservation buffer	2.50%
Capital conservation buffer ratio to be phased in at beginning	0.625%
Capital conservation buffer phase in year	2,016
Capital conservation buffer period final year	2,019

Regulatory Capital Matters - Ac

Regulatory Capital Matters - Actual and Required Capital Amounts and Ratios (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital to risk-weighted assets, Actual Amount	$ 188,225	$ 167,562
Total Capital to risk-weighted assets, Actual Amount	262,107	186,243
Tier 1 (Core) Capital to risk weighted assets, Actual Amount	188,225	174,656
Tier 1 (Core) Capital to average assets, Actual Amount	$ 188,225	$ 174,656
Common equity Tier 1 capital to risk-weighted assets	9.09%	10.08%
Total Capital to risk weighted assets, Actual Ratio	12.66%	11.21%
Tier 1 (Core) Capital to risk weighted assets, Actual Ratio	9.09%	10.51%
Tier 1 (Core) Capital to average assets, Actual Ratio	7.15%	8.48%
Common equity Tier 1 capital to risk-weighted assets	$ 93,188	$ 74,768
Total Capital to risk weighted assets, Required For Capital Adequacy Purposes Amount	165,667	132,922
Tier 1 (Core) Capital to risk weighted assets, Required For Capital Adequacy Purposes Amount	124,250	99,691
Tier 1 (Core) Capital to average assets, Required For Capital Adequacy Purposes Amount	$ 105,361	$ 82,362
Common equity Tier 1 capital to risk-weighted assets	4.50%	4.50%
Total Capital to risk weighted assets, Required For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 (Core) Capital to risk weighted assets, Required For Capital Adequacy Purposes Ratio	6.00%	6.00%
Tier 1 (Core) Capital to average assets, Required For Capital Adequacy Purposes Ratio	4.00%	4.00%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital to risk-weighted assets, Actual Amount	$ 243,995	$ 172,205
Total Capital to risk-weighted assets, Actual Amount	259,585	183,792
Tier 1 (Core) Capital to risk weighted assets, Actual Amount	243,995	172,205
Tier 1 (Core) Capital to average assets, Actual Amount	$ 243,995	$ 172,205
Common equity Tier 1 capital to risk-weighted assets	11.77%	10.36%
Total Capital to risk weighted assets, Actual Ratio	12.52%	11.06%
Tier 1 (Core) Capital to risk weighted assets, Actual Ratio	11.77%	10.36%
Tier 1 (Core) Capital to average assets, Actual Ratio	9.26%	8.36%
Common equity Tier 1 capital to risk-weighted assets	$ 93,314	$ 74,772
Total Capital to risk weighted assets, Required For Capital Adequacy Purposes Amount	165,892	132,928
Tier 1 (Core) Capital to risk weighted assets, Required For Capital Adequacy Purposes Amount	124,419	99,696
Tier 1 (Core) Capital to average assets, Required For Capital Adequacy Purposes Amount	$ 105,343	$ 82,357
Common equity Tier 1 capital to risk-weighted assets	4.50%	4.50%
Total Capital to risk weighted assets, Required For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 (Core) Capital to risk weighted assets, Required For Capital Adequacy Purposes Ratio	6.00%	6.00%
Tier 1 (Core) Capital to average assets, Required For Capital Adequacy Purposes Ratio	4.00%	4.00%
Common equity Tier 1 capital to risk-weighted assets	$ 134,787	$ 108,004
Total Capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	207,365	166,160
Tier 1 (Core) Capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	165,892	132,928
Tier 1 (Core) Capital to average assets, To Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 131,678	$ 102,946
Common equity Tier 1 capital to risk-weighted assets	6.50%	6.50%
Total Capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	10.00%	10.00%
Tier 1 (Core) Capital to risk weighted assets, To Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	8.00%	8.00%
Tier 1 (Core) Capital to average assets, To Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	5.00%	5.00%

Fair Value - Additional informa

Fair Value - Additional information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)SecurityLoan	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Fair Value Measurements Of Financial Instruments [Line Items]
Fair value measurements, valuation techniques			For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2), using matrix pricing. Matrix pricing is a mathematical technique commonly used to price debt securities that are not actively traded, values debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities' relationship to other benchmark quoted securities (Level 2 inputs).
Change in fair value related to loans held for sale	$ 2,942,000	$ 2,463,000	$ 6,859,000	$ 5,573,000
Carrying amount of impaired loans with specific allocations	2,414,000		2,414,000		$ 4,170,000
Additional provision for loan losses	1,392,000	1,724,000	4,095,000	3,154,000
Foreclosed assets	0		0		200,000
Write-down value during period	0	0	0	0
Loans Held for Sale [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Unpaid principal balance of loans held for sale	25,937,000		25,937,000		13,754,000
Change in fair value related to loans held for sale			882,000		325,000
Change in fair value of loans held for sale	326,000	248,000	558,000	(22,000)
Fair Value [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Carrying amount of impaired loans with specific allocations	375,000		$ 375,000		$ 0
Number of impaired loans | SecurityLoan			1
Changes Measurement [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Additional provision for loan losses	$ 115,000	$ 115,000	$ 0	$ 0
Maximum [Member] | Loans Held for Sale [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Term of loan			90 days		90 days

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	$ 670,756	$ 575,838
Loans held for sale	26,819	14,079
U.S. Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	3,138	6,817
Mortgage-Backed Securities: Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	556,797	500,955
Mortgage-Backed Securities: Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	19,759	19,835
State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	91,062	48,231
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	670,056	575,838
Loans held for sale	26,819	14,079
Mortgage banking derivatives	858	411
Mortgage banking derivatives	87	29
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	3,138	6,817
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage-Backed Securities: Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	556,797	500,955
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage-Backed Securities: Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	19,759	19,835
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	$ 91,062	$ 48,231

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	$ 55,749	$ 52,394	$ 47,658	$ 49,347
Certificates of deposit held at other financial institutions	1,055	250
Securities available for sale	670,756	575,838
Securities held to maturity, Carrying Amount	235,050	158,200
Securities held to maturity, Fair Value	243,946	161,969
Loans held for sale, Fair Value	26,819	14,079
Net loans, Carrying Amount	1,638,468	1,292,239
Servicing rights, net, Carrying Amount	3,566	3,455
Servicing rights, net, Fair Value	3,948	4,635
Accrued interest receivable	7,871	7,299
Deposits, Carrying Amount	2,217,954	1,814,039
Federal funds purchased and repurchase agreements, Carrying Amount	45,843	101,086
Federal Home Loan Bank advances, Carrying Amount	162,000	57,000
Subordinated notes, net	58,292
Accrued interest payable	1,399	644
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents , Fair Value	55,749	52,394
Certificates of deposit held at other financial institutions, Fair Value	1,055	250
Securities available for sale	670,756	575,838
Securities held to maturity, Fair Value	243,946	161,969
Loans held for sale, Fair Value	26,819	14,079
Net loans, Fair Value	1,621,695	1,279,849
Restricted equity securities, Fair Value	0	0
Servicing rights, net, Fair Value	3,948	4,635
Accrued interest receivable	7,871	7,299
Deposits, Fair Value	2,219,602	1,811,548
Federal funds purchased and repurchase agreements, Fair Value	45,843	101,086
Federal Home Loan Bank advances, Fair Value	162,024	56,931
Subordinated notes, net	61,867
Accrued interest payable	1,399	644
Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents , Fair Value	55,749	52,394
Restricted equity securities, Fair Value	0	0
Accrued interest receivable		3
Deposits, Fair Value	1,223,120	1,062,587
Accrued interest payable	123	100
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Certificates of deposit held at other financial institutions, Fair Value	1,055	250
Securities available for sale	670,756	575,838
Securities held to maturity, Fair Value	243,946	161,969
Loans held for sale, Fair Value	26,819	14,079
Restricted equity securities, Fair Value	0	0
Servicing rights, net, Fair Value	3,948	4,635
Accrued interest receivable	3,634	3,780
Deposits, Fair Value	996,482	748,961
Federal funds purchased and repurchase agreements, Fair Value	45,843	101,086
Federal Home Loan Bank advances, Fair Value	162,024	56,931
Accrued interest payable	915	544
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net loans, Fair Value	1,621,695	1,279,849
Restricted equity securities, Fair Value	0	0
Accrued interest receivable	4,237	3,516
Subordinated notes, net	61,867
Accrued interest payable	361
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	55,749	52,394
Certificates of deposit held at other financial institutions	1,055	250
Securities available for sale	670,756	575,838
Securities held to maturity, Carrying Amount	235,050	158,200
Loans held for sale, Carrying Amount	26,819	14,079
Net loans, Carrying Amount	1,638,468	1,292,239
Restricted equity securities, Carrying Amount	11,829	7,998
Servicing rights, net, Carrying Amount	3,566	3,455
Accrued interest receivable	7,871	7,299
Deposits, Carrying Amount	2,217,954	1,814,039
Federal funds purchased and repurchase agreements, Carrying Amount	45,843	101,086
Federal Home Loan Bank advances, Carrying Amount	162,000	57,000
Subordinated notes, net	58,292
Accrued interest payable	$ 1,399	$ 644

Earnings Per Share - Computatio

Earnings Per Share - Computation of Earnings per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Basic
Net income available to common shareholders	$ 7,030	$ 5,125	$ 20,239	$ 11,341
Less: earnings allocated to participating securities	(69)	(52)	(213)	(127)
Net income allocated to common shareholders	$ 6,961	$ 5,073	$ 20,026	$ 11,214
Weighted average common shares outstanding including participating securities	10,721,253	10,516,290	10,652,223	9,668,497
Less: Participating securities	(105,343)	(107,502)	(111,937)	(108,617)
Average shares	10,615,910	10,408,788	10,540,286	9,559,880
Basic earnings per common share	$ 0.66	$ 0.49	$ 1.90	$ 1.17
Diluted
Net income allocated to common shareholders	$ 6,961	$ 5,073	$ 20,026	$ 11,214
Weighted average common shares outstanding for basic earnings per common share	10,615,910	10,408,788	10,540,286	9,559,880
Add: Dilutive effects of assumed exercises of stock options	612,955	534,148	585,326	466,955
Add: Dilutive effects of assumed exercises of stock warrants	13,370	13,265	12,937	13,257
Average shares and dilutive potential common shares	11,242,235	10,956,201	11,138,549	10,040,092
Dilutive earnings per common share	$ 0.62	$ 0.46	$ 1.80	$ 1.12

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Stock options to purchase shares of the Company's common stock	272,087	226,040	151,544	228,691

Subordinated Notes - Additional

Subordinated Notes - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2016	Sep. 30, 2016	Jun. 30, 2016
Debt Instrument [Line Items]
Notes, Redemption description		The March 2016 Notes will mature on March 30, 2026, unless redeemed prior to that date. The Company may redeem the March 2016 Notes in whole or in part on or after March 30, 2021, and in whole, but not in part, at any time within 90 days following a “Regulatory Capital Treatment Event”, as defined in the First Supplemental Indenture, dated as of March 31, 2016, between the Company and U.S. Bank National Association, as trustee (the “Supplemental Indenture”) governing the March 2016 Notes. The redemption price for any redemption will be 100% of the principal amount of the March 2016 Notes, plus unpaid interest, if any, accrued to but excluding the date of redemption. Any early redemption of the March 2016 Notes will be subject to the receipt of the approval of the Federal Reserve to the extent then required under applicable laws or regulations, including capital regulations.
Proceeds from sale of notes		$ 58,213,000
Subordinated Debt [Member]
Debt Instrument [Line Items]
Notes, Aggregate principal amount	$ 40,000,000		$ 20,000,000
Notes, Maturity date	Mar. 30, 2026	Jul. 1, 2026
Notes, Redemption period start date	Mar. 30, 2021
Notes, Redemption price percentage	100.00%
Notes, Sinking fund	$ 0	$ 0
Notes, Redemption description		The June 2016 Notes have a stated maturity of July 1, 2026, and bear interest at a fixed rate of 7.00% per year through June 30, 2021, computed on the basis of a 360-day year consisting of twelve 30-day months, payable semi-annually in arrears on January 1 and July 1 of each year beginning on January 1, 2017.
Notes, Interest rate	6.875%	7.00%	7.00%
Notes, Frequency of payment		Semi-annually
Notes, Variable rate basis description		Three-month LIBOR
Notes, Basis spread on variable rate		6.04%
Proceeds from sale of notes	$ 38,843,000	$ 58,292,000
Notes, Issuance cost	$ 1,382,000	$ 404,000
Term of notes	10 years	10 years
Subordinated Debt [Member] | Series A [Member] | Senior Non-cumulative Preferred Stock [Member]
Debt Instrument [Line Items]
Preferred stock redemption amount	$ 10,000,000
Subordinated Debt [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Notes, Frequency of payment		Quarterly
Notes, Basis spread on variable rate	5.636%