Franklin Financial Network (FSB) 10-Q 13 Aug 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Aug. 07, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
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	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		10,518,706

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from financial institutions	$ 43,163	$ 49,347
Certificates of deposit at other financial institutions	250	250
Securities available for sale	635,184	395,705
Securities held to maturity (fair value 2015-$46,885 and 2014-$53,741)	46,815	53,332
Loans held for sale, at fair value	16,842	18,462
Loans	962,191	787,188
Allowance for loan losses	(8,016)	(6,680)
Net loans	954,175	780,508
Restricted equity securities, at cost	7,685	5,349
Premises and equipment, net	9,584	9,664
Accrued interest receivable	4,886	3,545
Bank owned life insurance	21,938	11,664
Deferred tax asset	8,430	6,780
Buildings held for sale		4,080
Foreclosed assets	206	715
Servicing rights, net	3,298	3,053
Goodwill	9,124	9,124
Core deposit intangible, net	2,359	2,698
Other assets	2,813	1,551
Total assets	1,766,752	1,355,827
Deposits
Non-interest bearing	167,749	150,337
Interest bearing	1,324,237	1,021,896
Total deposits	1,491,986	1,172,233
Federal funds purchased and repurchase agreements	36,567	39,078
Federal Home Loan Bank advances	57,000	19,000
Accrued interest payable	578	421
Other liabilities	3,540	3,296
Total liabilities	1,589,671	1,234,028
Shareholders' equity
Senior non-cumulative preferred stock, no par value, $10,000 liquidation value: Series A, 1,000,000 shares authorized; 10,000 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	10,000	10,000
Common stock, no par value; 20,000,000 shares authorized; 10,502,671 and 7,756,411 shares issued and outstanding at June 30, 2015 and December 31 2014, respectively	146,017	94,251
Retained earnings	21,588	15,372
Accumulated other comprehensive income (loss)	(524)	2,176
Total shareholders' equity	177,081	121,799
Total liabilities and shareholders' equity	$ 1,766,752	$ 1,355,827

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Held-to-maturity securities, fair value	$ 46,885	$ 53,741
Preferred stock, par value	$ 0	$ 0
Preferred stock, liquidation value	$ 10,000	$ 10,000
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	10,000	10,000
Preferred stock, shares outstanding	10,000	10,000
Common stock, par value	$ 0	$ 0
Common stock shares authorized	20,000,000	20,000,000
Common stock shares issued	10,502,671	7,756,411
Common stock, share outstanding	10,502,671	7,756,411

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest income and dividends
Loans, including fees	$ 12,173	$ 6,380	$ 23,327	$ 12,298
Securities:
Taxable	2,957	2,234	5,622	4,537
Tax-exempt	169	20	189	40
Dividends on restricted equity securities	83	51	150	91
Federal funds sold and other	31	14	51	32
Total interest income	15,413	8,699	29,339	16,998
Interest expense
Deposits	1,913	1,214	3,546	2,362
Federal funds purchased and repurchase agreements	92	57	163	84
Federal Home Loan Bank advances	81	80	146	109
Total interest expense	2,086	1,351	3,855	2,555
Net interest income	13,327	7,348	25,484	14,443
Provision for loan losses	805	440	1,430	825
Net interest income after provision for loan losses	12,522	6,908	24,054	13,618
Noninterest income
Service charges on deposit accounts	18	12	34	24
Other service charges and fees	690	313	1,308	549
Net gains on sale of loans	1,463	1,567	3,110	2,351
Loan servicing fees, net of amortization of servicing assets	60	88	103	100
Gain on sales and calls of securities	109	63	524	71
Net gain (loss) on foreclosed assets	21	(2)	27	31
Investment services	301	35	587	77
Other	189	354	373	648
Total noninterest income	2,851	2,430	6,066	3,851
Noninterest expense
Salaries and employee benefits	6,071	3,805	11,752	7,350
Occupancy and equipment	1,699	1,009	3,278	1,795
FDIC assessment expense	216	120	430	239
Marketing	198	135	418	246
Professional fees	507	279	866	633
Amortization of core deposit intangible	167		339
Indirect expenses related to public offering	309		326
Other	1,405	730	2,784	1,307
Total noninterest expense	10,572	6,078	20,193	11,570
Income before income tax expense	4,801	3,260	9,927	5,899
Income tax expense	1,667	1,225	3,661	2,335
Net income	3,134	2,035	6,266	3,564
Dividends paid on Series A preferred stock	(25)	(25)	(50)	(50)
Net income available to common shareholders	$ 3,109	$ 2,010	$ 6,216	$ 3,514
Earnings per share:
Basic	$ 0.30	$ 0.41	$ 0.67	$ 0.72
Diluted	$ 0.28	$ 0.40	$ 0.64	$ 0.70

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 3,134	$ 2,035	$ 6,266	$ 3,564
Unrealized gains/losses on securities:
Unrealized holding gain (loss) arising during the period	(6,900)	4,892	(3,865)	8,068
Reclassification adjustment for gains included in net income	(109)	(63)	(524)	(71)
Net unrealized gains (losses)	(7,009)	4,829	(4,389)	7,997
Tax effect	2,754	(1,849)	1,689	(3,062)
Total other comprehensive income (loss)	(4,255)	2,980	(2,700)	4,935
Comprehensive income (loss)	$ (1,121)	$ 5,015	$ 3,566	$ 8,499

Condensed Consolidated Statemen

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	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, 2013	$ 65,163	$ 10,000	$ 52,638		$ 7,058		$ (4,533)
Beginning balance,shares at Dec. 31, 2013			4,862,875
Exercise of common stock options	1		$ 1
Exercise of common stock options, number of shares			119
Dividends paid on Series A preferred stock	(50)					$ (50)
Issuance of restricted stock, net of forfeitures			32,568
Stock based compensation expense, net of forfeitures	311		$ 311
Stock issued in conjunction with 401(k) employer match	275		$ 275
Stock issued in conjunction with 401(k) employer match, number of shares			20,345
Net income	3,564				3,564
Other comprehensive income (loss)	4,935						4,935
Ending balance at Jun. 30, 2014	74,199	10,000	$ 53,225		10,572		402
Ending balance,shares at Jun. 30, 2014			4,915,907
Beginning balance at Dec. 31, 2013	$ 65,163	10,000	$ 52,638		7,058		(4,533)
Beginning balance,shares at Dec. 31, 2013			4,862,875
Exercise of common stock options, number of shares	23,809
Ending balance at Dec. 31, 2014	$ 121,799	10,000	$ 94,251		15,372		2,176
Ending balance,shares at Dec. 31, 2014			7,756,411
Exercise of common stock options	$ 780		$ 780
Exercise of common stock options, number of shares	77,600		71,965
Exercise of common stock warrants	$ 43		$ 43
Common stock warrants exercised, shares			3,600
Dividends paid on Series A preferred stock	(50)	0				$ (50)
Issuance of restricted stock, net of forfeitures			30,695
Stock based compensation expense, net of forfeitures	371		$ 371
Stock issued related to initial public offering, net of stock issuance costs of $5,015	50,425		50,425
Common stock, shares				2,640,000
Excess tax benefit from exercise of stock options	147		147
Net income	6,266				6,266
Other comprehensive income (loss)	(2,700)						(2,700)
Ending balance at Jun. 30, 2015	$ 177,081	$ 10,000	$ 146,017		$ 21,588		$ (524)
Ending balance,shares at Jun. 30, 2015			10,502,671

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)
Initial Public Offering [Member] | Common Stock [Member]
Stock issued related to initial public offering, stock issuance costs	$ 5,015

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net income	$ 6,266	$ 3,564
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization on premises and equipment	659	335
Accretion of purchase accounting adjustments	(1,245)
Net amortization of securities	1,837	1,127
Amortization of loan servicing right asset	441	363
Amortization of core deposit intangible	339
Provision for loan losses	1,430	825
Excess tax benefit related to the exercise of stock options	(147)
Origination of loans held for sale	(161,442)	(109,942)
Proceeds from sale of loans held for sale	165,486	106,443
Net gain on sale of loans	(3,110)	(2,351)
Gain on sale of available for sale securities	(375)	(71)
Gain on call of held to maturity securities	(149)
Income from bank owned life insurance	(274)	(120)
(Gain) loss on sale of foreclosed assets	(27)	(31)
Stock-based compensation	371	311
Compensation expense related to common stock issued to 401(k) plan	240	159
Recognition of deferred gain on sale of loans	(18)	(21)
Recognition of deferred gain on sale of foreclosed assets	(5)
Net change in:
Accrued interest receivable and other assets	(2,565)	(1,061)
Accrued interest payable and other liabilities	331	(716)
Net cash from operating activities	8,048	(1,186)
Available for sale securities:
Sales	32,288	24,373
Purchases	(446,795)	(69,210)
Maturities, prepayments and calls	169,306	56,491
Held to maturity securities:
Purchases		(8,601)
Maturities, prepayments and calls	6,538	6,370
Net change in loans	(173,912)	(65,554)
Purchase of bank owned life insurance	(10,000)
Proceeds from sale of buildings held for sale	4,080
Purchase of restricted equity securities	(2,336)	(745)
Proceeds from sale of foreclosed assets	531	377
Purchases of premises and equipment, net	(579)	(2,014)
Net cash from investing activities	(420,879)	(58,513)
Cash flows from financing activities
Increase in deposits	319,813	66,024
Decrease in federal funds purchased and repurchase agreements	(2,511)	(8,439)
Proceeds from Federal Home Loan Bank advances	157,000	10,000
Repayment of Federal Home Loan Bank advances	(119,000)
Proceeds from exercise of common stock warrants	43
Proceeds from exercise of common stock options, including excess tax benefit	927	1
Proceeds from issuance of common stock, net of offering costs	50,425
Dividends paid on preferred stock	(50)	(50)
Net cash from financing activities	406,647	67,536
Net change in cash and cash equivalents	(6,184)	7,837
Cash and cash equivalents at beginning of period	49,347	18,217
Cash and cash equivalents at end of period	43,163	26,054
Supplemental information:
Interest paid	3,698	2,403
Income taxes paid	$ 5,150	3,470
Non-cash supplemental information:
Transfers from loans to foreclosed assets		$ 1,315

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	NOTE 1—BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements of Franklin Financial Network, Inc. (“FFN”), and its wholly owned subsidiaries, Franklin Synergy Bank and BCG Consulting Group, Inc. (collectively, the “Company”), 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 11, 2015.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Acquisitions	NOTE 2—ACQUISITIONS Acquisition of MidSouth Bank On July 1, 2014 the Company completed the acquisition of MidSouth Bank (“MidSouth”), pursuant to the terms of the Agreement and Plan of Reorganization and Bank Merger (the “merger agreement”) dated November 19, 2013. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations The Company acquired 100% of the outstanding preferred and common stock of MidSouth. The purchase price consisted of both cash and shares of the Company’s common stock. MidSouth’s common shareholders received 0.425926 shares of FFN common stock for each share of MidSouth common stock. MidSouth’s preferred shareholders received 0.851852 shares of FFN common stock for each share of MidSouth preferred stock. Each MidSouth Series 2009A warrant holder received 0.18 shares of FFN common stock for each MidSouth Series 2009A warrant, and each Series 2011-A warrant holder received 0.146667 shares of FFN common stock for each MidSouth Series 2011-A warrant. In lieu of issuing fractional shares of FFN common stock, FFN paid former MidSouth shareholders an amount in cash determined by multiplying (i) $13.50 by (ii) the fraction of a share (rounded to the nearest ten thousandth when expressed in decimal form) of FFN common stock. MidSouth common stock options were converted into options to purchase shares of FFN common stock based on the 0.425926 exchange ratio, with the new exercise price becoming the exercise price of the MidSouth options divided by the exchange ratio. On the date of the merger, 2,766,191 shares of FFN common stock were exchanged for the common and preferred stock, and common stock warrants of MidSouth in accordance with the proration and allocation procedures contained in the merger agreement and as noted above. Subsequently, cash totaling $100 was paid to dissenting MidSouth shareholders representing 7,427 shares of FFN common stock. In addition, $18 of cash was paid to MidSouth shareholders for fractional shares in accordance with the merger agreement. Based on a valuation of the FFN’s common stock as of July 1, 2014, the resulting purchase price was $41,094. The following table summarizes the purchase price calculation: Number of Per share Number of FFN Common Shares 3,873 0.425926 1,650 Convertible Voting Preferred Stock, 2009-A 1,018 0.851852 867 Convertible Voting Preferred Stock, 2011-A 242 0.851852 206 Series 2009-A Stock Warrants (strike price $3.25) 193 0.185185 36 Series 2011-A Stock Warrants (strike price $3.68) 44 0.153333 7 2,766 Multiplied by FFN common stock value at acquisition date $ 14.50 Fair value of FFN common stock issued (“Stock Consideration”) $ 40,110 Cash consideration paid for fractional shares 18 Cash consideration paid for dissenting shares 100 Fair value of MidSouth stock options converted to FFN stock options 866 Total acquisition consideration $ 41,094 On July 1, 2014 the Company acquired MidSouth. As previously disclosed, the fair values initially assigned to the assets acquired and liabilities assumed were preliminary and subject to refinement for up to one year after the closing date of the acquisition as new information relative to closing date fair values becomes available. Based on appraisals received subsequent to the acquisition date, the Company adjusted its initial fair value estimate of foreclosed assets that were acquired. The table below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the July 1, 2014 purchase date. In Thousands July 1, 2014 Measurement July 1, 2014 Assets: Cash and due from banks $ 1,369 $ — $ 1,369 Interest-bearing accounts at other financial institutions 10,946 10,946 Securities, available-for-sale 57,431 57,431 Loans held for sale 7,071 7,071 Loans 184,345 184,345 Certificates of deposit at other financial institutions 250 250 Restricted equity securities 1,572 1,572 Bank premises and equipment, net 6,650 6,650 Bank-owned life insurance 3,144 3,144 Accrued interest receivable 728 728 Foreclosed assets 800 (260 ) 540 Core deposit intangible 3,060 3,060 Deferred tax asset 6,753 100 6,853 Goodwill 8,964 160 9,124 Other assets 747 747 Total assets acquired $ 293,830 $ — $ 293,830 Liabilities: Deposits $ 244,415 $ — $ 244,415 Short-term borrowings 6,893 6,893 Other liabilities 1,428 1,428 Total liabilities assumed $ 252,736 $ — $ 252,736 At June 30, 2015, there were no circumstances or significant changes that have occurred since July 1, 2014 related to the acquisition of MidSouth that, in management’s assessment, would necessitate recording impairment of goodwill. In the acquisition, the Company purchased $184,345 of loans at fair value, net of $7,347, or 3.8%, estimated discount to the outstanding principal balance, representing 38.0% of the Company’s total loans at June 30, 2014. Of the total loans acquired, management identified loans totaling $5,527 as having credit deficiencies. All loans that were on non-accrual status and all loan relationships that were identified as substandard or impaired as of the acquisition date were considered by management to be credit-impaired and are accounted for pursuant to ASC Topic 310-30. The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of July 1, 2014 for purchased credit-impaired (“PCI”) loans. Contractually required principal and interest payments have been adjusted for estimated prepayments. Contractually required principal and interest $ 8,510 Non-accretable difference (1,745 ) Cash flows expected to be collected 6,765 Accretable yield (1,238 ) Total purchased credit-impaired loans acquired $ 5,527 The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance at acquisition date. Unpaid Fair Loans: Residential real estate $ 39,425 $ 38,618 Commercial real estate 82,465 80,566 Construction and land development 43,766 42,454 Commercial loans 16,311 15,352 Consumer and other loans 1,865 1,828 Purchased credit-impaired 7,860 5,527 Total earning assets $ 191,692 $ 184,345 In its assumption of the deposit liabilities, the Company believed the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. The Company determined the estimated fair value of the core deposit intangible asset totaled $3,060, which will be amortized utilizing an accelerated amortization method over an estimated economic life of 8.2 years. When determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships. Pro-forma information Pro-forma data for the three- and six-month periods ending June 30, 2014 listed in the table below present pro-forma information as if the MidSouth acquisition occurred at the beginning of 2014. Because the MidSouth transaction closed on July 1, 2014, and its actual results are included in the Company’s actual operating results for the three- and six-month periods ending June 30, 2015, there is no pro-forma information for those periods. Three Six Net interest income $ 10,645 $ 21,048 Net income available to common shareholders 2,217 4,098 Earnings per share—basic $ 0.29 $ 0.53 Earnings per share—diluted $ 0.28 $ 0.52 Supplemental pro forma earnings for the three and six months ended June 30, 2014 were adjusted to exclude acquisition-related costs that were incurred during the three and six months ended June 30, 2014 of $965 and $1,481, respectively. Supplemental pro forma earnings for the three and six months ended June 30, 2014 were adjusted to include discount accretion and premium amortization related to the fair value adjustments to acquisition date assets and liabilities, as appropriate. During the three months ending June 30, 2014, the acquisition of MidSouth increased pro-forma net interest income by approximately $3,297 and net income available to common shareholders by approximately $207. During the six months ending June 30, 2014, the acquisition of MidSouth increased pro-forma net interest income by approximately $6,605 and net income available to common shareholders by approximately $584.

Securities

Securities	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Securities	NOTE 3—SECURITIES The following table summarizes the amortized cost and fair value of the available for sale securities portfolio at June 30, 2015 and December 31, 2014 and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income. Amortized Gross Gross Fair June 30, 2015 U.S. government sponsored entities and agencies $ 14,236 $ 154 $ (192 ) $ 14,198 Mortgage-backed securities: residential 512,479 3,617 (3,986 ) 512,110 Mortgage-backed securities: commercial 20,303 35 (149 ) 20,189 State and political subdivisions 89,028 90 (431 ) 88,687 Total $ 636,046 $ 3,896 $ (4,758 ) $ 635,184 Amortized Gross Gross Fair December 31, 2014 U.S. government sponsored entities and agencies $ 30,070 $ 417 $ (314 ) $ 30,173 U.S. Treasury securities 20,000 — — 20,000 Mortgage-backed securities: residential 335,677 4,593 (1,203 ) 339,067 Mortgage-backed securities: commercial 6,432 33 — 6,465 Total $ 392,179 $ 5,043 $ (1,517 ) $ 395,705 The amortized cost and fair value of the held to maturity securities portfolio at June 30, 2015 and December 31, 2014 and the corresponding amounts of gross unrecognized gains and losses were as follows: Amortized Gross Gross Fair June 30, 2015 U.S. government sponsored entities and agencies $ 3,374 $ 15 $ (102 ) $ 3,287 Mortgage backed securities: residential 34,551 486 (548 ) 34,489 State and political subdivisions 8,890 248 (29 ) 9,109 Total $ 46,815 $ 749 $ (679 ) $ 46,885 Gross Gross Gross Fair December 31, 2014 U.S. government sponsored entities and agencies $ 5,550 $ 162 $ (87 ) $ 5,625 Mortgage backed securities: residential 38,587 555 (562 ) 38,580 State and political subdivisions 9,195 351 (10 ) 9,536 Total $ 53,332 $ 1,068 $ (659 ) $ 53,741 Sales and calls of available for sale securities were as follows: Three Months Ended Six Months Ended 2015 2014 2015 2014 Proceeds $ 22,999 $ 18,922 $ 34,288 $ 24,373 Gross gains — 201 390 225 Gross losses (1 ) (138 ) (15 ) (154 ) Calls of held to maturity securities were as follows: Three Months Ended Six Months Ended 2015 2014 2015 2014 Proceeds $ 1,500 $ — $ 2,300 $ — Gross gains 110 — 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. June 30, 2015 Amortized Fair Available for sale Three months or less $ — $ — Over three months through one year — — Over one year through five years — — Over five years through ten years 9,711 9,862 Over ten years 93,553 93,023 Mortgage-backed securities: residential 512,479 512,110 Mortgage-backed securities: commercial 20,303 20,189 Total $ 636,046 $ 635,184 Held to maturity Three months or less $ — $ — Over three months through one year — — Over one year through five years 1,382 1,439 Over five years through ten years 1,106 1,122 Over ten years 9,776 9,835 Mortgage-backed securities: residential 34,551 34,489 Total $ 46,815 $ 46,885 Securities pledged at June 30, 2015 and December 31, 2014 had a carrying amount of $479,240 and $366,764 and were pledged to secure public deposits and repurchase agreements. At June 30, 2015 and December 31, 2014, 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 June 30, 2015 and December 31, 2014, 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 June 30, 2015 Available for sale U.S. government sponsored entities and agencies $ 1,933 $ (67 ) $ 4,325 $ (125 ) $ 6,258 $ (192 ) Mortgage-backed securities: residential 259,366 (2,976 ) 30,688 (1,010 ) 290,054 (3,986 ) Mortgage-backed securities: commercial 16,148 (149 ) — — 16,148 (149 ) State and political subdivisions 60,330 (431 ) — — 60,330 (431 ) Total available for sale $ 337,777 $ (3,623 ) $ 35,013 $ (1,135 ) $ 372,790 $ (4,758 ) 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 $ 1,942 $ (58 ) $ 956 $ (44 ) $ 2,898 $ (102 ) Mortgage-backed securities: residential 8,909 (102 ) 9,338 (446 ) 18,247 (548 ) State and political subdivisions 3,971 (29 ) — — 3,971 (29 ) Total held to maturity $ 14,822 $ (189 ) $ 10,294 $ (490 ) $ 25,116 $ (679 ) Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2014 Available for sale U.S. government sponsored entities and agencies $ 9,999 $ (1 ) $ 8,232 $ (313 ) $ 18,231 $ (314 ) Mortgage-backed securities: residential 59,078 (323 ) 41,939 (880 ) 101,017 (1,203 ) Total available for sale $ 69,077 $ (324 ) $ 50,171 $ (1,193 ) $ 119,248 $ (1,517 ) 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 $ — $ — $ 2,913 $ (87 ) $ 2,913 $ (87 ) Mortgage-backed securities: residential 5,246 (25 ) 13,001 (537 ) 18,247 (562 ) State and political subdivisions 507 (1 ) 592 (9 ) 1,099 (10 ) Total held to maturity $ 5,753 $ (26 ) $ 16,506 $ (633 ) $ 22,259 $ (659 ) Unrealized 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	6 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Loans	NOTE 4—LOANS Loans at June 30, 2015 and December 31, 2014 were as follows: June 30, December 31, Loans that are not PCI loans Construction and land development $ 293,629 $ 239,225 Commercial real estate: Nonfarm, nonresidential 273,221 240,975 Other 6,370 5,377 Residential real estate: Closed-end 1-4 family 137,815 130,631 Other 96,292 83,129 Commercial and industrial 144,735 76,570 Consumer and other 7,527 8,025 Loans before net deferred loan fees 959,589 783,932 Deferred loan fees, net (1,676 ) (1,059 ) Total loans that are not PCI loans 957,913 782,873 PCI loans Construction and land development $ 77 $ 77 Commercial real estate: Nonfarm, nonresidential 1,752 1,798 Other — — Residential real estate: Closed-end 1-4 family 703 706 Other 107 108 Commercial and industrial 1,639 1,624 Consumer and other — 2 Total PCI loans 4,278 4,315 Allowance for loan losses (8,016 ) (6,680 ) Total loans, net of allowance for loan losses $ 954,175 $ 780,508 The following table presents the activity in the allowance for loan losses by portfolio segment for the three month periods ending June 30, 2015 and 2014: Construction Commercial Residential Commercial Consumer Total Three Months Ending June 30, 2015 Allowance for loan losses: Beginning balance $ 2,549 $ 2,124 $ 1,727 $ 850 $ 58 $ 7,308 Provision for loan losses 18 197 24 474 92 805 Loans charged-off — — (17 ) — (88 ) (105 ) Recoveries — — 5 — 3 8 Total ending allowance balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Three Months Ending June 30, 2014 Allowance for loan losses: Beginning balance $ 1,546 $ 1,695 $ 1,536 $ 464 $ 63 $ 5,304 Provision for loan losses 250 159 (3 ) 44 (10 ) 440 Loans charged-off — — — — — — Recoveries — — 27 — — 27 Total ending allowance balance $ 1,796 $ 1,854 $ 1,560 $ 508 $ 53 $ 5,771 There was no allowance for loan losses for PCI loans for the three months ended June 30, 2015 or for the three months ended June 30, 2014. The following table presents the activity in the allowance for loan losses by portfolio segment for the six-month periods ending June 30, 2015 and 2014: Construction Commercial Residential Commercial Consumer Total Six Months Ending June 30, 2015 Allowance for loan losses: Beginning balance $ 2,690 $ 1,494 $ 1,791 $ 650 $ 55 $ 6,680 Provision for loan losses (123 ) 827 (43 ) 674 95 1,430 Loans charged-off — — (17 ) — (88 ) (105 ) Recoveries — — 8 — 3 11 Total ending allowance balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Six Months Ending June 30, 2014 Allowance for loan losses: Beginning balance $ 1,497 $ 1,566 $ 1,402 $ 337 $ 98 $ 4,900 Provision for loan losses 299 288 112 171 (45 ) 825 Loans charged-off — — — — — — Recoveries — — 46 — — 46 Total ending allowance balance $ 1,796 $ 1,854 $ 1,560 $ 508 $ 53 $ 5,771 There was no allowance for loan losses for PCI loans for the six months ended June 30, 2015 or for the six months ended June 30, 2014. 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 June 30, 2015 and December 31, 2014. For purposes of this disclosure, recorded investment in loans excludes accrued interest receivable and loan fees, net due to immateriality. Construction Commercial Residential Commercial Consumer Total June 30, 2015 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 96 $ 23 $ 119 Collectively evaluated for impairment 2,567 2,321 1,739 1,228 42 7,897 Purchased credit-impaired loans — — — — — — Total ending allowance balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Loans: Individually evaluated for impairment $ — $ 927 $ 807 $ 275 $ 23 $ 2,032 Collectively evaluated for impairment 293,629 278,664 233,300 144,460 7,504 957,557 Purchased credit-impaired loans 77 1,752 810 1,639 — 4,278 Total ending loans balance $ 293,706 $ 281,343 $ 234,917 $ 146,374 $ 7,527 $ 963,867 Construction Commercial Residential Commercial Consumer Total December 31, 2014 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 18 $ — $ 18 Collectively evaluated for impairment 2,690 1,494 1,791 632 55 6,662 Purchased credit-impaired loans — — — — — — Total ending allowance balance $ 2,690 $ 1,494 $ 1,791 $ 650 $ 55 $ 6,680 Loans: Individually evaluated for impairment $ — $ 835 $ 93 $ 18 $ — $ 946 Collectively evaluated for impairment 239,225 245,517 213,667 76,552 8,025 782,986 Purchased credit-impaired loans 77 1,798 814 1,624 2 4,315 Total ending loans balance $ 239,302 $ 248,150 $ 214,574 $ 78,194 $ 8,027 $ 788,247 Loans collectively evaluated for impairment reported at June 30, 2015 include certain loans acquired from MidSouth on July 1, 2014. The acquired loans were recorded at estimated fair value at date of acquisition, which included an estimated credit discount. On July 1, 2014, acquired non-PCI loans were recorded at an estimated fair value of $178,818, comprised of contractually unpaid principal totaling $183,832 net of estimated discounts totaling $5,014 which included both credit and interest rate discount components. At June 30, 2015, acquired non-PCI loans were recorded at $111,284, comprised of contractually unpaid principal totaling $114,159 net of discounts totaling $2,875. Management evaluated these loans for credit deterioration since acquisition and determined that no allowance for loan losses was necessary at June 30, 2015. The following table presents information related to impaired loans by class of loans as of June 30, 2015 and December 31, 2014: Unpaid Recorded Allowance for June 30, 2015 With no allowance recorded: Commercial real estate: Nonfarm, nonresidential $ 2,514 $ 927 $ — Residential real estate: Closed-end 1-4 family 97 97 — Other 710 710 — Commercial and industrial 179 179 — Subtotal 3,500 1,913 — With an allowance recorded: Commercial and industrial 96 96 96 Consumer and other 23 23 23 Subtotal 119 119 119 Total $ 3,619 $ 2,032 $ 119 December 31, 2014 With no allowance recorded: Commercial real estate: Nonfarm, nonresidential $ 2,422 $ 835 $ — Residential real estate: Closed-end 1-4 family 93 93 — Subtotal 2,515 928 — With an allowance recorded: Commercial and industrial 18 18 18 Subtotal 18 18 18 Total $ 2,533 $ 946 $ 18 The following table presents the average recorded investment of impaired loans by class of loans for the three and six months ended June 30, 2015 and 2014: Three Months Ended Six Months Ended Average Recorded Investment 2015 2014 2015 2014 With no allowance recorded: Construction and land development $ — $ — $ — $ — Commercial real estate: Nonfarm, nonresidential 865 — 850 603 Residential real estate: Closed-end 1-4 family 313 — 265 — Other 238 — 119 — Commercial and industrial 110 — 104 — Subtotal 1,526 — 1,338 603 With an allowance recorded: Construction and land development $ — $ — $ — $ — Commercial real estate: Nonfarm, nonresidential — 1,375 — 1,375 Residential real estate: 1-4 family — 229 — 725 Commercial and industrial 43 66 30 66 Consumer and other 16 — 8 — Subtotal 59 1,670 38 2,166 Total $ 1,585 $ 1,670 $ 1,376 $ 2,769 The impact on net interest income for these loans was not material to the Company’s results of operations for the three and six months ended June 30, 2015 and 2014. 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 June 30, 2015 and December 31, 2014: Nonaccrual Loans Past Due June 30, 2015 Commercial real estate: Nonfarm, nonresidential $ 835 $ — Residential real estate: Closed-end1-4 family 96 — Commercial and industrial 16 — Total $ 947 $ — December 31, 2014 Commercial real estate: Nonfarm, nonresidential $ 835 $ — Residential real estate: Closed-end 1-4 family — 316 Total $ 835 $ 316 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 June 30, 2015 and December 31, 2014 by class of loans: 30-59 60-89 Greater Total Loans PCI Total June 30, 2015 Construction and land development $ 1,328 $ 38 $ — $ 1,366 $ 292,263 $ 77 $ 293,706 Commercial real estate: Nonfarm, nonresidential — — 835 835 272,386 1,752 274,973 Other — — — — 6,370 — 6,370 Residential real estate: Closed-end 1-4 family 630 35 — 665 137,150 703 138,518 Other 710 40 — 750 95,542 107 96,399 Commercial and industrial 79 — — 79 144,656 1,639 146,374 Consumer and other 23 — — 23 7,504 — 7,527 $ 2,770 $ 113 $ 835 $ 3,718 $ 955,871 $ 4,278 $ 963,867 30-59 60-89 Greater Total Loans PCI Total December 31, 2014 Construction and land development $ 354 $ — $ — $ 354 $ 238,871 $ 77 $ 239,302 Commercial real estate: Nonfarm, nonresidential — — 835 835 240,140 1,798 242,773 Other — — — — 5,377 — 5,377 Residential real estate: Closed-end 1-4 family 299 165 316 780 129,851 706 131,337 Other 52 — — 52 83,077 108 83,237 Commercial and industrial — 212 — 212 76,358 1,624 78,194 Consumer and other — — — — 8,025 2 8,027 $ 705 $ 377 $ 1,151 $ 2,233 $ 781,699 $ 4,315 $ 788,247 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 June 30, 2015 and December 31, 2014: Pass Special Substandard Total June 30, 2015 Construction and land development $ 293,629 $ — $ 77 $ 293,706 Commercial real estate: Nonfarm, nonresidential 271,384 — 3,589 274,973 Other 6,370 — — 6,370 Residential real estate: Closed-end 1-4 family 136,939 — 1,579 138,518 Other 95,582 — 817 96,399 Commercial and industrial 144,460 — 1,914 146,374 Consumer and other 7,504 — 23 7,527 $ 955,868 $ — $ 7,999 $ 963,867 Pass Special Substandard Total December 31, 2014 Construction and land development $ 239,225 $ — $ 77 $ 239,302 Commercial real estate: Nonfarm, nonresidential 239,584 — 3,189 242,773 Other 5,377 — — 5,377 Residential real estate: 1-4 family 128,869 — 2,468 131,337 Other 83,129 — 108 83,237 Commercial and industrial 76,552 — 1,642 78,194 Consumer and other 8,025 — 2 8,027 $ 780,761 $ — $ 7,486 $ 788,247 Purchased Credit-impaired (“PCI”) loans Income is recognized on PCI loans pursuant to ASC Topic 310-30. A portion of the fair value discount has been 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 June 30, 2015 and December 31, 2014. Contractually required principal and interest payments have been adjusted for estimated prepayments. Jun 30, 2015 Dec 31, 2014 Contractually required principal and interest $ 6,000 $ 6,532 Non-accretable difference (973 ) (1,270 ) Cash flows expected to be collected 5,027 5,262 Accretable yield (749 ) (947 ) Carrying value of acquired loans 4,278 4,315 Allowance for loan losses — — Carrying value less allowance for loan losses $ 4,278 $ 4,315 Management adjusted estimates of future expected losses, cash flows and renewal assumptions during the current quarter. These adjustments resulted in a decrease in expected cash flows and accretable yield, and a decrease in the non-accretable difference. The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three- and six-month periods ending June 30, 2015. Activity during the three-month period ending June 30, 2015 Mar 31, 2015 Effect of Income All other Jun 30, 2015 Contractually required principal and interest $ 6,135 $ — $ — $ (135 ) $ 6,000 Non-accretable difference (989 ) — — 16 (973 ) Cash flows expected to be collected 5,146 — — (119 ) 5,027 Accretable yield (840 ) — 133 (42 ) (749 ) Carry value of acquired loans $ 4,306 $ — $ 133 $ (161 ) $ 4,278 Activity during the six-month period ending June 30, 2015 Dec 31, 2014 Effect of Income All other Jun 30, 2015 Contractually required principal and interest $ 6,532 $ — $ — $ (532 ) $ 6,000 Non-accretable difference (1,270 ) — — 297 (973 ) Cash flows expected to be collected 5,262 — — (235 ) 5,027 Accretable yield (947 ) — 190 8 (749 ) Carry value of acquired loans $ 4,315 $ — $ 190 $ (227 ) $ 4,278 Troubled Debt Restructurings The Company’s loan portfolio contains no loans that have been modified in a troubled debt restructuring.

Loan Servicing

Loan Servicing	6 Months Ended
	Jun. 30, 2015
Text Block [Abstract]
Loan Servicing	NOTE 5—LOAN SERVICING Loans serviced for others are not reported as assets. The principal balances of these loans at June 30, 2015 and December 31, 2014 are as follows: June 30, December 31, Loan portfolios serviced for: Federal Home Loan Mortgage Corporation $ 445,816 $ 414,222 Other 3,683 3,986 The components of net loan servicing fees for the three and six months ended June 30, 2015 and 2014 were as follows: Three Months Ended Six Months Ended 2015 2014 2015 2014 Loan servicing fees, net: Loan servicing fees $ 278 $ 236 $ 544 $ 463 Amortization of loan servicing fees (218 ) (148 ) (441 ) (363 ) Change in impairment — — — — Total $ 60 $ 88 $ 103 $ 100 The fair value of servicing rights was estimated by management to be approximately $4,679 at June 30, 2015. Fair value for June 30, 2015 was determined using a weighted average discount rate of 10.5% and a weighted average prepayment speed of 9.2%. At December 31, 2014, the fair value of servicing rights was estimated by management to be approximately $4,180. Fair value for December 31, 2014 was determined using weighted average discount rate of 10.5% and a weighted average prepayment speed of 10.8%. The weighted average amortization period is 6.77 years. Estimated amortization expense for each of the next three years is: 2015 $ 668 2016 456 2017 456

Share-Based Payments

Share-Based Payments	6 Months Ended
	Jun. 30, 2015
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 3,600 warrants exercised during the six months ended June 30, 2015, for which the Company received cash proceeds of $43. The exercised warrants had an aggregate intrinsic value of $31 at the date of exercise. No warrants were exercised during the six months ended June 30, 2014. At June 30, 2015, there were 28,277 outstanding warrants associated with the 2010 offering. Since the common stock of the Company has been 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 holder of such 2010 warrant, 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. Stock Option Plan Employee, organizer and director awards are 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 3 to 5 years and have a 10-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. During 2014, the Company granted 181,680 options, had 23,809 options exercised, and had 31,135 options that were either forfeited, cancelled or expired. In addition, on July 1, 2014, 322,300 MidSouth common stock options were converted into 137,280 options to purchase shares of FFN common stock with an exercise price of $8.57 per option pursuant to the terms of the merger agreement (see Note 2). Using the Black-Scholes option valuation model, the grant date fair value was estimated to be $6.31 per converted option based on the $14.50 fair value per share of FFN common stock at July 1, 2014. No compensation expense was required related to the converted options. 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 a peer group. 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. June 30, June 30, Risk-free interest rate 1.81 % 2.24 % Expected term 7.5 years 7.5 years Expected stock price volatility 25.00 % 11.04 % Dividend yield 0.22 % 0.44 % The weighted average fair value of options granted for the six months ended June 30, 2015 and 2014 were $6.35 and $2.44, respectively. A summary of the activity in the stock option plans for the six months ended June 30, 2015 follows: Shares Weighted Weighted Aggregate Outstanding at beginning of year 1,210,660 $ 11.32 6.53 $ 7,244 Granted 210,782 20.62 Exercised (77,600 ) 11.52 Forfeited, expired, or cancelled (2,108 ) 18.56 Outstanding at period end 1,341,734 $ 12.75 6.58 $ 13,077 Vested or expected to vest 1,274,647 $ 12.75 6.58 $ 12,423 Exercisable at period end 811,299 $ 10.73 5.23 $ 9,550 The Company received cash proceeds of $780 for the options exercised during the six months ended June 30, 2015. The exercised options had an aggregate intrinsic value of $639 at the date of exercise. As of June 30, 2015, there was $1,756 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 1.8 years. Restricted Share Award Plan A summary of activity for non-vested restricted share awards for the six months ended June 30, 2015 is as follows: Non-vested Shares Shares Weighted-Average Non-vested at beginning of year 102,710 $ 13.93 Granted 31,938 20.69 Vested (11,705 ) 13.61 Forfeited (1,243 ) 16.29 Non-vested at period end 121,700 $ 15.73 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 June 30, 2015, there was $1,677 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 3.7 years.

Regulatory Capital Matters

Regulatory Capital Matters	6 Months Ended
	Jun. 30, 2015
Banking and Thrift [Abstract]
Regulatory Capital Matters	NOTE 7—REGULATORY CAPITAL MATTERS In July 2013, the Federal Reserve Board and the FDIC approved final rules that substantially amend the regulatory risk-based capital rules applicable to the Company and Bank. The final rules implement the regulatory capital reforms of the Basel Committee on Banking Supervision reflected in “Basel III: A Global Framework for More Resilient Banks and Banking Systems” (“Basel III”) and changes required by the Dodd-Frank Act. Under these rules, the leverage and risk-based capital ratios of bank holding companies may not be lower than the leverage and risk-based capital ratios for insured depository institutions. The final rules implementing the Basel III regulatory capital reforms became effective to the Company and Bank on January 1, 2015, and include new minimum risk-based capital and leverage ratios. Moreover, these rules refine the definition of what constitutes capital for purposes of calculating those ratios, including the definitions of Tier 1 capital and Tier 2 capital. In addition to the new minimum capital level requirements, the rules also establish a “capital conservation buffer” of 2.5% (to be phased in over three years) above the new regulatory minimum risk-based capital ratios, and result in the following minimum ratios once the capital conservation buffer is fully phased in: (i) a common Tier 1 risk-based capital ratio of 7.0%, (ii) a Tier 1 risk-based capital ratio of 8.5%, and (iii) a total risk-based capital ratio of 10.5%. The capital conservation buffer is to be phased in beginning in January 2016 at 0.625% of risk-weighted assets and will increase each year until fully implemented in January 2019. An institution will be subject to limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses if capital levels fall below minimum levels plus the buffer amounts. These limitations establish a maximum percentage of eligible retained income that could be utilized for such actions. The final rules allow banks and their holding companies with less than $250 billion in assets a one-time opportunity to opt-out of a requirement to include unrealized gains and losses in accumulated other comprehensive income in their capital calculation. The Company has opted out of this requirement. Management believes, as of June 30, 2015, that the Company and Bank met all capital adequacy requirements to which they are subject and met the requirements to be considered well-capitalized. The Company’s and Bank’s actual capital amounts and ratios are presented in the following table (in thousands): Actual Minimum Capital Excess Amount Ratio Amount Ratio June 30, 2015 Company common equity Tier 1 capital to risk-weighted assets $ 152,941 12.29 % $ 56,006 4.50 % $ 96,935 Company total capital to risk-weighted assets $ 168,019 13.50 % $ 99,566 8.00 % $ 68,453 Company Tier 1 capital to risk-weighted assets $ 160,003 12.86 % $ 74,674 6.00 % $ 85,329 Company Tier 1 capital to average assets $ 160,003 10.19 % $ 63,377 4.00 % $ 96,626 Bank common equity Tier 1 capital to risk-weighted assets $ 150,511 12.11 % $ 55,949 4.50 % $ 94,562 Bank total capital to risk-weighted assets $ 158,527 12.75 % $ 99,465 8.00 % $ 59,062 Bank Tier 1 capital to risk-weighted assets $ 150,511 12.11 % $ 74,599 6.00 % $ 75,912 Bank Tier 1 capital to average assets $ 150,511 9.59 % $ 62,785 4.00 % $ 87,726 December 31, 2014 Company total capital to risk-weighted assets $ 114,475 12.30 % $ 74,464 8.00 % $ 40,011 Company Tier 1 capital to risk-weighted assets $ 107,795 11.58 % $ 37,232 4.00 % $ 70,563 Company Tier 1 capital to average assets $ 107,795 8.57 % $ 50,291 4.00 % $ 57,504 Bank total capital to risk-weighted assets $ 113,830 12.23 % $ 74,447 8.00 % $ 39,383 Bank Tier 1 capital to risk-weighted assets $ 107,150 11.51 % $ 37,223 4.00 % $ 69,927 Tier 1 capital to average assets $ 107,150 8.52 % $ 50,279 4.00 % $ 56,871 Dividend Restrictions

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2015
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. The Company used the following methods and significant assumptions to estimate the fair value of each type of asset and liability: Securities Derivatives Impaired Loans Foreclosed Assets 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 $ — $ 14,198 $ — Mortgage-backed securities-residential — 512,110 — Mortgage-backed securities-commercial — 20,189 — State and political subdivisions — 88,687 — Total securities available for sale $ — $ 635,184 $ — Loans held for sale $ — $ 16,842 $ — Mortgage banking derivatives $ — $ 242 $ — Financial Liabilities Mortgage banking derivatives $ — $ 16 $ — Fair Value Measurements at Quoted Prices Significant Significant Financial Assets Securities available for sale U.S. government sponsored entities and agencies $ — $ 30,173 $ — U.S. Treasury Bills 20,000 — — Mortgage-backed securities-residential — 339,067 — Mortgage-backed securities-commercial — 6,465 — State and political subdivisions — — — Total securities available for sale $ 20,000 $ 375,705 $ — Loans held for sale $ — $ 18,462 $ — Mortgage banking derivatives $ — $ 285 $ — Financial Liabilities Mortgage banking derivatives $ — $ 132 $ — As of June 30, 2015, the unpaid principal balance of loans held for sale was $16,548 resulting in an unrealized gain of $294 included in gains on sale of loans. For the three months ended June 30, 2015 and 2014, the change in fair value related to loans held for sale, which is included in gain on sale of loans, was ($293) and $329, respectively. For the six months ended June 30, 2015 and 2014, the change in fair value related to loans held for sale, which is included in gain on sale of loans, was ($270) and $538, respectively. None of these loans are 90 days or more past due or on nonaccrual as of June 30, 2015. There were no transfers between level 1 and 2 during 2015 and 2014. Assets measured at fair value on a non-recurring basis are summarized below: There were no collateral dependent impaired loans carried at fair value as of June 30, 2015 or December 31, 2014. For the three months ended June 30, 2015 and 2014, $0 and ($20) in additional provision for loan losses was recorded related to impaired loans recorded at fair value of collateral. For the six months ended June 30, 2015 and 2014, $0 and $46 in additional provision for loan losses was recorded related to impaired loans recorded at fair value of collateral. Foreclosed assets measured at fair value less costs to sell, had a net carrying amount of $206 and $715 as of June 30, 2015 and December 31, 2014, respectively. There were no properties at June 30, 2015 or 2014 that had required write-downs to fair value resulting in no write downs for the three or six months ending June 30, 2015 and 2014, respectively. The carrying amounts and estimated fair values of financial instruments, at June 30, 2015 and December 31, 2014 are as follows: Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 43,163 $ 43,163 $ — $ — $ 43,163 Securities available for sale 635,184 — 635,184 — 635,184 Certificates of deposit held at other financial institutions 250 — 250 — 250 Securities held to maturity 46,815 — 46,885 — 46,885 Loans held for sale 16,842 — 16,842 — 16,842 Net loans 954,175 — — 953,829 953,829 Restricted equity securities 7,685 n/a n/a n/a n/a Servicing rights, net 3,298 — 4,679 — 4,679 Accrued interest receivable 4,886 6 2,257 2,623 4,886 Financial liabilities Deposits $ 1,491,986 $ 940,917 $ 557,906 $ — $ 1,498,823 Federal funds purchased and repurchase agreements 36,567 — 36,567 — 36,567 Federal Home Loan Bank advances 57,000 — 57,152 — 57,152 Accrued interest payable 578 47 531 — 578 Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 49,347 $ 49,347 $ — $ — $ 49,347 Securities available for sale 395,705 20,000 375,705 — 395,705 Certificates of deposit held at other financial institutions 250 — 250 — 250 Securities held to maturity 53,332 — 53,741 — 53,741 Loans held for sale 18,462 — 18,462 — 18,462 Net loans 780,508 — — 782,745 782,745 Restricted equity securities 5,349 n/a n/a n/a n/a Servicing rights, net 3,053 — 4,180 — 4,180 Accrued interest receivable 3,545 — 1,368 2,177 3,545 Financial liabilities Deposits $ 1,172,233 $ 848,158 $ 326,644 $ — $ 1,174,802 Federal funds purchased and repurchase agreements 39,078 — 39,078 — 39,078 Federal Home Loan Bank advances 19,000 — 19,146 — 19,146 Accrued interest payable 421 33 388 — 421 The methods and assumptions not previously described used to estimate fair value are described as follows: (a) Cash and Cash Equivalents: (b) Loans: The fair value of loans held for sale is estimated based upon binding contracts and quotes from third party investors resulting in a Level 2 classification. (c) Restricted Equity Securities: (d) Mortgage Servicing Rights: (e) Deposits: (f) Federal Funds Purchased and Repurchase Agreements: (g) Federal Home Loan Bank Advances: (h) Accrued Interest Receivable/Payable: (i) Off-balance Sheet Instruments:

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2015
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 2015 2014 Basic Net income available to common shareholders $ 3,109 $ 2,010 Less: earnings allocated to participating securities (34 ) (20 ) Net income allocated to common shareholders $ 3,075 $ 1,990 Weighted average common shares outstanding including participating securities 10,490,972 4,889,873 Less: Participating securities (116,103 ) (49,356 ) Average shares 10,374,869 4,840,517 Basic earnings per common share $ 0.30 $ 0.41 Diluted Net income allocated to common shareholders $ 3,075 $ 1,990 Weighted average common shares outstanding for basic earnings per common share 10,374,869 4,840,517 Add: Dilutive effects of assumed exercises of stock options 457,613 127,848 Add: Dilutive effects of assumed exercises of stock warrants 12,785 3,542 Average shares and dilutive potential common shares 10,845,267 4,971,907 Dilutive earnings per common share $ 0.28 $ 0.40 Six Months Ended 2015 2014 Basic Net income available to common shareholders $ 6,216 $ 3,514 Less: earnings allocated to participating securities (73 ) (28 ) Net income allocated to common shareholders $ 6,143 $ 3,486 Weighted average common shares outstanding including participating securities 9,237,574 4,876,347 Less: Participating securities (109,183 ) (38,325 ) Average shares 9,128,391 4,838,022 Basic earnings per common share $ 0.67 $ 0.72 Diluted Net income allocated to common shareholders $ 6,143 $ 3,486 Weighted average common shares outstanding for basic earnings per common share 9,128,391 4,838,022 Add: Dilutive effects of assumed exercises of stock options 445,611 124,728 Add: Dilutive effects of assumed exercises of stock warrants 12,882 3,542 Average shares and dilutive potential common shares 9,586,884 4,966,292 Dilutive earnings per common share $ 0.64 $ 0.70 For the three months ended June 30, 2015 and 2014, stock options for 147,782 and 245,432 shares of common stock were not considered in computing diluted earnings per common share because they were antidilutive. Stock options for 210,782 and 249,968 shares of common stock were not considered in computing diluted earnings per common share for the six months ended June 30, 2015 and 2014 because they were antidilutive.

Capital Offering

Capital Offering	6 Months Ended
	Jun. 30, 2015
Text Block [Abstract]
Capital Offering	NOTE 10—CAPITAL OFFERING The Company commenced its initial public stock offering on March 26, 2015. The Company issued 2,640,000 shares of common stock at a price of $21.00 per share and began trading on the New York Stock Exchange on March 26, 2015, under the ticker symbol “FSB”. Net proceeds were as follows: Gross proceeds $ 55,440 Less: stock offering costs (5,015 ) Net proceeds from issuance of common stock $ 50,425

Acquisitions (Tables)

Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Summary of Purchase Price Calculation	The following table summarizes the purchase price calculation: Number of Per share Number of FFN Common Shares 3,873 0.425926 1,650 Convertible Voting Preferred Stock, 2009-A 1,018 0.851852 867 Convertible Voting Preferred Stock, 2011-A 242 0.851852 206 Series 2009-A Stock Warrants (strike price $3.25) 193 0.185185 36 Series 2011-A Stock Warrants (strike price $3.68) 44 0.153333 7 2,766 Multiplied by FFN common stock value at acquisition date $ 14.50 Fair value of FFN common stock issued (“Stock Consideration”) $ 40,110 Cash consideration paid for fractional shares 18 Cash consideration paid for dissenting shares 100 Fair value of MidSouth stock options converted to FFN stock options 866 Total acquisition consideration $ 41,094
Summary of Preliminary Estimates of Fair Value of the Assets Purchased , Including Goodwill, and Liabilities Assumed	The table below summarizes the fair value of the assets purchased, including goodwill, and liabilities assumed as of the July 1, 2014 purchase date. In Thousands July 1, 2014 Measurement July 1, 2014 Assets: Cash and due from banks $ 1,369 $ — $ 1,369 Interest-bearing accounts at other financial institutions 10,946 10,946 Securities, available-for-sale 57,431 57,431 Loans held for sale 7,071 7,071 Loans 184,345 184,345 Certificates of deposit at other financial institutions 250 250 Restricted equity securities 1,572 1,572 Bank premises and equipment, net 6,650 6,650 Bank-owned life insurance 3,144 3,144 Accrued interest receivable 728 728 Foreclosed assets 800 (260 ) 540 Core deposit intangible 3,060 3,060 Deferred tax asset 6,753 100 6,853 Goodwill 8,964 160 9,124 Other assets 747 747 Total assets acquired $ 293,830 $ — $ 293,830 Liabilities: Deposits $ 244,415 $ — $ 244,415 Short-term borrowings 6,893 6,893 Other liabilities 1,428 1,428 Total liabilities assumed $ 252,736 $ — $ 252,736
Contractually Required Principal and Interest Cash Payments, Management's Estimates of Expected Total Cash Payments	The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of July 1, 2014 for purchased credit-impaired (“PCI”) loans. Contractually required principal and interest payments have been adjusted for estimated prepayments. Contractually required principal and interest $ 8,510 Non-accretable difference (1,745 ) Cash flows expected to be collected 6,765 Accretable yield (1,238 ) Total purchased credit-impaired loans acquired $ 5,527
Summary of Fair Value of Acquired Loans and Unpaid Principal Balance	The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance at acquisition date. Unpaid Fair Loans: Residential real estate $ 39,425 $ 38,618 Commercial real estate 82,465 80,566 Construction and land development 43,766 42,454 Commercial loans 16,311 15,352 Consumer and other loans 1,865 1,828 Purchased credit-impaired 7,860 5,527 Total earning assets $ 191,692 $ 184,345
Pro-Forma Financial Information and Actual Results of Acquisition	Pro-forma data for the three- and six-month periods ending June 30, 2014 listed in the table below present pro-forma information as if the MidSouth acquisition occurred at the beginning of 2014. Because the MidSouth transaction closed on July 1, 2014, and its actual results are included in the Company’s actual operating results for the three- and six-month periods ending June 30, 2015, there is no pro-forma information for those periods. Three Six Net interest income $ 10,645 $ 21,048 Net income available to common shareholders 2,217 4,098 Earnings per share—basic $ 0.29 $ 0.53 Earnings per share—diluted $ 0.28 $ 0.52

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2015
Summary of Amortized Cost and Fair Value of Available for Sale Securities	The following table summarizes the amortized cost and fair value of the available for sale securities portfolio at June 30, 2015 and December 31, 2014 and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income. Amortized Gross Gross Fair June 30, 2015 U.S. government sponsored entities and agencies $ 14,236 $ 154 $ (192 ) $ 14,198 Mortgage-backed securities: residential 512,479 3,617 (3,986 ) 512,110 Mortgage-backed securities: commercial 20,303 35 (149 ) 20,189 State and political subdivisions 89,028 90 (431 ) 88,687 Total $ 636,046 $ 3,896 $ (4,758 ) $ 635,184 Amortized Gross Gross Fair December 31, 2014 U.S. government sponsored entities and agencies $ 30,070 $ 417 $ (314 ) $ 30,173 U.S. Treasury securities 20,000 — — 20,000 Mortgage-backed securities: residential 335,677 4,593 (1,203 ) 339,067 Mortgage-backed securities: commercial 6,432 33 — 6,465 Total $ 392,179 $ 5,043 $ (1,517 ) $ 395,705
Schedule of Amortized Cost and Fair Value of Held to Maturity Securities Portfolio	The amortized cost and fair value of the held to maturity securities portfolio at June 30, 2015 and December 31, 2014 and the corresponding amounts of gross unrecognized gains and losses were as follows: Amortized Gross Gross Fair June 30, 2015 U.S. government sponsored entities and agencies $ 3,374 $ 15 $ (102 ) $ 3,287 Mortgage backed securities: residential 34,551 486 (548 ) 34,489 State and political subdivisions 8,890 248 (29 ) 9,109 Total $ 46,815 $ 749 $ (679 ) $ 46,885 Gross Gross Gross Fair December 31, 2014 U.S. government sponsored entities and agencies $ 5,550 $ 162 $ (87 ) $ 5,625 Mortgage backed securities: residential 38,587 555 (562 ) 38,580 State and political subdivisions 9,195 351 (10 ) 9,536 Total $ 53,332 $ 1,068 $ (659 ) $ 53,741
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. June 30, 2015 Amortized Fair Available for sale Three months or less $ — $ — Over three months through one year — — Over one year through five years — — Over five years through ten years 9,711 9,862 Over ten years 93,553 93,023 Mortgage-backed securities: residential 512,479 512,110 Mortgage-backed securities: commercial 20,303 20,189 Total $ 636,046 $ 635,184 Held to maturity Three months or less $ — $ — Over three months through one year — — Over one year through five years 1,382 1,439 Over five years through ten years 1,106 1,122 Over ten years 9,776 9,835 Mortgage-backed securities: residential 34,551 34,489 Total $ 46,815 $ 46,885
Schedule of Unrealized Losses and Fair Value by Major Security Type	The following table summarizes the securities with unrealized and unrecognized losses at June 30, 2015 and December 31, 2014, 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 June 30, 2015 Available for sale U.S. government sponsored entities and agencies $ 1,933 $ (67 ) $ 4,325 $ (125 ) $ 6,258 $ (192 ) Mortgage-backed securities: residential 259,366 (2,976 ) 30,688 (1,010 ) 290,054 (3,986 ) Mortgage-backed securities: commercial 16,148 (149 ) — — 16,148 (149 ) State and political subdivisions 60,330 (431 ) — — 60,330 (431 ) Total available for sale $ 337,777 $ (3,623 ) $ 35,013 $ (1,135 ) $ 372,790 $ (4,758 ) 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 $ 1,942 $ (58 ) $ 956 $ (44 ) $ 2,898 $ (102 ) Mortgage-backed securities: residential 8,909 (102 ) 9,338 (446 ) 18,247 (548 ) State and political subdivisions 3,971 (29 ) — — 3,971 (29 ) Total held to maturity $ 14,822 $ (189 ) $ 10,294 $ (490 ) $ 25,116 $ (679 ) Less Than 12 Months 12 Months or Longer Total Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2014 Available for sale U.S. government sponsored entities and agencies $ 9,999 $ (1 ) $ 8,232 $ (313 ) $ 18,231 $ (314 ) Mortgage-backed securities: residential 59,078 (323 ) 41,939 (880 ) 101,017 (1,203 ) Total available for sale $ 69,077 $ (324 ) $ 50,171 $ (1,193 ) $ 119,248 $ (1,517 ) 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 $ — $ — $ 2,913 $ (87 ) $ 2,913 $ (87 ) Mortgage-backed securities: residential 5,246 (25 ) 13,001 (537 ) 18,247 (562 ) State and political subdivisions 507 (1 ) 592 (9 ) 1,099 (10 ) Total held to maturity $ 5,753 $ (26 ) $ 16,506 $ (633 ) $ 22,259 $ (659 )
Available-for-sale Securities [Member]
Summary of Sales and Calls of Securities	Sales and calls of available for sale securities were as follows: Three Months Ended Six Months Ended 2015 2014 2015 2014 Proceeds $ 22,999 $ 18,922 $ 34,288 $ 24,373 Gross gains — 201 390 225 Gross losses (1 ) (138 ) (15 ) (154 )
Held-to-maturity Securities [Member]
Summary of Sales and Calls of Securities	Calls of held to maturity securities were as follows: Three Months Ended Six Months Ended 2015 2014 2015 2014 Proceeds $ 1,500 $ — $ 2,300 $ — Gross gains 110 — 149 — Gross losses — — — —

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Summary of Loans	Loans at June 30, 2015 and December 31, 2014 were as follows: June 30, December 31, Loans that are not PCI loans Construction and land development $ 293,629 $ 239,225 Commercial real estate: Nonfarm, nonresidential 273,221 240,975 Other 6,370 5,377 Residential real estate: Closed-end 1-4 family 137,815 130,631 Other 96,292 83,129 Commercial and industrial 144,735 76,570 Consumer and other 7,527 8,025 Loans before net deferred loan fees 959,589 783,932 Deferred loan fees, net (1,676 ) (1,059 ) Total loans that are not PCI loans 957,913 782,873 PCI loans Construction and land development $ 77 $ 77 Commercial real estate: Nonfarm, nonresidential 1,752 1,798 Other — — Residential real estate: Closed-end 1-4 family 703 706 Other 107 108 Commercial and industrial 1,639 1,624 Consumer and other — 2 Total PCI loans 4,278 4,315 Allowance for loan losses (8,016 ) (6,680 ) Total loans, net of allowance for loan losses $ 954,175 $ 780,508
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 ending June 30, 2015 and 2014: Construction Commercial Residential Commercial Consumer Total Three Months Ending June 30, 2015 Allowance for loan losses: Beginning balance $ 2,549 $ 2,124 $ 1,727 $ 850 $ 58 $ 7,308 Provision for loan losses 18 197 24 474 92 805 Loans charged-off — — (17 ) — (88 ) (105 ) Recoveries — — 5 — 3 8 Total ending allowance balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Three Months Ending June 30, 2014 Allowance for loan losses: Beginning balance $ 1,546 $ 1,695 $ 1,536 $ 464 $ 63 $ 5,304 Provision for loan losses 250 159 (3 ) 44 (10 ) 440 Loans charged-off — — — — — — Recoveries — — 27 — — 27 Total ending allowance balance $ 1,796 $ 1,854 $ 1,560 $ 508 $ 53 $ 5,771 The following table presents the activity in the allowance for loan losses by portfolio segment for the six-month periods ending June 30, 2015 and 2014: Construction Commercial Residential Commercial Consumer Total Six Months Ending June 30, 2015 Allowance for loan losses: Beginning balance $ 2,690 $ 1,494 $ 1,791 $ 650 $ 55 $ 6,680 Provision for loan losses (123 ) 827 (43 ) 674 95 1,430 Loans charged-off — — (17 ) — (88 ) (105 ) Recoveries — — 8 — 3 11 Total ending allowance balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Six Months Ending June 30, 2014 Allowance for loan losses: Beginning balance $ 1,497 $ 1,566 $ 1,402 $ 337 $ 98 $ 4,900 Provision for loan losses 299 288 112 171 (45 ) 825 Loans charged-off — — — — — — Recoveries — — 46 — — 46 Total ending allowance balance $ 1,796 $ 1,854 $ 1,560 $ 508 $ 53 $ 5,771
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 June 30, 2015 and December 31, 2014. For purposes of this disclosure, recorded investment in loans excludes accrued interest receivable and loan fees, net due to immateriality. Construction Commercial Residential Commercial Consumer Total June 30, 2015 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 96 $ 23 $ 119 Collectively evaluated for impairment 2,567 2,321 1,739 1,228 42 7,897 Purchased credit-impaired loans — — — — — — Total ending allowance balance $ 2,567 $ 2,321 $ 1,739 $ 1,324 $ 65 $ 8,016 Loans: Individually evaluated for impairment $ — $ 927 $ 807 $ 275 $ 23 $ 2,032 Collectively evaluated for impairment 293,629 278,664 233,300 144,460 7,504 957,557 Purchased credit-impaired loans 77 1,752 810 1,639 — 4,278 Total ending loans balance $ 293,706 $ 281,343 $ 234,917 $ 146,374 $ 7,527 $ 963,867 Construction Commercial Residential Commercial Consumer Total December 31, 2014 Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ — $ — $ — $ 18 $ — $ 18 Collectively evaluated for impairment 2,690 1,494 1,791 632 55 6,662 Purchased credit-impaired loans — — — — — — Total ending allowance balance $ 2,690 $ 1,494 $ 1,791 $ 650 $ 55 $ 6,680 Loans: Individually evaluated for impairment $ — $ 835 $ 93 $ 18 $ — $ 946 Collectively evaluated for impairment 239,225 245,517 213,667 76,552 8,025 782,986 Purchased credit-impaired loans 77 1,798 814 1,624 2 4,315 Total ending loans balance $ 239,302 $ 248,150 $ 214,574 $ 78,194 $ 8,027 $ 788,247
Summary of Impaired Loans by Class of Loans	The following table presents information related to impaired loans by class of loans as of June 30, 2015 and December 31, 2014: Unpaid Recorded Allowance for June 30, 2015 With no allowance recorded: Commercial real estate: Nonfarm, nonresidential $ 2,514 $ 927 $ — Residential real estate: Closed-end 1-4 family 97 97 — Other 710 710 — Commercial and industrial 179 179 — Subtotal 3,500 1,913 — With an allowance recorded: Commercial and industrial 96 96 96 Consumer and other 23 23 23 Subtotal 119 119 119 Total $ 3,619 $ 2,032 $ 119 December 31, 2014 With no allowance recorded: Commercial real estate: Nonfarm, nonresidential $ 2,422 $ 835 $ — Residential real estate: Closed-end 1-4 family 93 93 — Subtotal 2,515 928 — With an allowance recorded: Commercial and industrial 18 18 18 Subtotal 18 18 18 Total $ 2,533 $ 946 $ 18 The following table presents the average recorded investment of impaired loans by class of loans for the three and six months ended June 30, 2015 and 2014: Three Months Ended Six Months Ended Average Recorded Investment 2015 2014 2015 2014 With no allowance recorded: Construction and land development $ — $ — $ — $ — Commercial real estate: Nonfarm, nonresidential 865 — 850 603 Residential real estate: Closed-end 1-4 family 313 — 265 — Other 238 — 119 — Commercial and industrial 110 — 104 — Subtotal 1,526 — 1,338 603 With an allowance recorded: Construction and land development $ — $ — $ — $ — Commercial real estate: Nonfarm, nonresidential — 1,375 — 1,375 Residential real estate: 1-4 family — 229 — 725 Commercial and industrial 43 66 30 66 Consumer and other 16 — 8 — Subtotal 59 1,670 38 2,166 Total $ 1,585 $ 1,670 $ 1,376 $ 2,769
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 June 30, 2015 and December 31, 2014: Nonaccrual Loans Past Due June 30, 2015 Commercial real estate: Nonfarm, nonresidential $ 835 $ — Residential real estate: Closed-end1-4 family 96 — Commercial and industrial 16 — Total $ 947 $ — December 31, 2014 Commercial real estate: Nonfarm, nonresidential $ 835 $ — Residential real estate: Closed-end 1-4 family — 316 Total $ 835 $ 316
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 June 30, 2015 and December 31, 2014 by class of loans: 30-59 60-89 Greater Total Loans PCI Total June 30, 2015 Construction and land development $ 1,328 $ 38 $ — $ 1,366 $ 292,263 $ 77 $ 293,706 Commercial real estate: Nonfarm, nonresidential — — 835 835 272,386 1,752 274,973 Other — — — — 6,370 — 6,370 Residential real estate: Closed-end 1-4 family 630 35 — 665 137,150 703 138,518 Other 710 40 — 750 95,542 107 96,399 Commercial and industrial 79 — — 79 144,656 1,639 146,374 Consumer and other 23 — — 23 7,504 — 7,527 $ 2,770 $ 113 $ 835 $ 3,718 $ 955,871 $ 4,278 $ 963,867 30-59 60-89 Greater Total Loans PCI Total December 31, 2014 Construction and land development $ 354 $ — $ — $ 354 $ 238,871 $ 77 $ 239,302 Commercial real estate: Nonfarm, nonresidential — — 835 835 240,140 1,798 242,773 Other — — — — 5,377 — 5,377 Residential real estate: Closed-end 1-4 family 299 165 316 780 129,851 706 131,337 Other 52 — — 52 83,077 108 83,237 Commercial and industrial — 212 — 212 76,358 1,624 78,194 Consumer and other — — — — 8,025 2 8,027 $ 705 $ 377 $ 1,151 $ 2,233 $ 781,699 $ 4,315 $ 788,247
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 June 30, 2015 and December 31, 2014: Pass Special Substandard Total June 30, 2015 Construction and land development $ 293,629 $ — $ 77 $ 293,706 Commercial real estate: Nonfarm, nonresidential 271,384 — 3,589 274,973 Other 6,370 — — 6,370 Residential real estate: Closed-end 1-4 family 136,939 — 1,579 138,518 Other 95,582 — 817 96,399 Commercial and industrial 144,460 — 1,914 146,374 Consumer and other 7,504 — 23 7,527 $ 955,868 $ — $ 7,999 $ 963,867 Pass Special Substandard Total December 31, 2014 Construction and land development $ 239,225 $ — $ 77 $ 239,302 Commercial real estate: Nonfarm, nonresidential 239,584 — 3,189 242,773 Other 5,377 — — 5,377 Residential real estate: 1-4 family 128,869 — 2,468 131,337 Other 83,129 — 108 83,237 Commercial and industrial 76,552 — 1,642 78,194 Consumer and other 8,025 — 2 8,027 $ 780,761 $ — $ 7,486 $ 788,247
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	Contractually required principal and interest payments have been adjusted for estimated prepayments. Jun 30, 2015 Dec 31, 2014 Contractually required principal and interest $ 6,000 $ 6,532 Non-accretable difference (973 ) (1,270 ) Cash flows expected to be collected 5,027 5,262 Accretable yield (749 ) (947 ) Carrying value of acquired loans 4,278 4,315 Allowance for loan losses — — Carrying value less allowance for loan losses $ 4,278 $ 4,315
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- and six-month periods ending June 30, 2015. Activity during the three-month period ending June 30, 2015 Mar 31, 2015 Effect of Income All other Jun 30, 2015 Contractually required principal and interest $ 6,135 $ — $ — $ (135 ) $ 6,000 Non-accretable difference (989 ) — — 16 (973 ) Cash flows expected to be collected 5,146 — — (119 ) 5,027 Accretable yield (840 ) — 133 (42 ) (749 ) Carry value of acquired loans $ 4,306 $ — $ 133 $ (161 ) $ 4,278 Activity during the six-month period ending June 30, 2015 Dec 31, 2014 Effect of Income All other Jun 30, 2015 Contractually required principal and interest $ 6,532 $ — $ — $ (532 ) $ 6,000 Non-accretable difference (1,270 ) — — 297 (973 ) Cash flows expected to be collected 5,262 — — (235 ) 5,027 Accretable yield (947 ) — 190 8 (749 ) Carry value of acquired loans $ 4,315 $ — $ 190 $ (227 ) $ 4,278

Loan Servicing (Tables)

Loan Servicing (Tables)	6 Months Ended
	Jun. 30, 2015
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 June 30, 2015 and December 31, 2014 are as follows: June 30, December 31, Loan portfolios serviced for: Federal Home Loan Mortgage Corporation $ 445,816 $ 414,222 Other 3,683 3,986
Components of Net Loan Servicing Fees	The components of net loan servicing fees for the three and six months ended June 30, 2015 and 2014 were as follows: Three Months Ended Six Months Ended 2015 2014 2015 2014 Loan servicing fees, net: Loan servicing fees $ 278 $ 236 $ 544 $ 463 Amortization of loan servicing fees (218 ) (148 ) (441 ) (363 ) Change in impairment — — — — Total $ 60 $ 88 $ 103 $ 100
Schedule of Estimated Amortization Expense	The weighted average amortization period is 6.77 years. Estimated amortization expense for each of the next three years is: 2015 $ 668 2016 456 2017 456

Share-Based Payments (Tables)

Share-Based Payments (Tables)	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Fair Value Assumptions of Stock Options	The fair value of options granted was determined using the following weighted-average assumptions as of grant date. June 30, June 30, Risk-free interest rate 1.81 % 2.24 % Expected term 7.5 years 7.5 years Expected stock price volatility 25.00 % 11.04 % Dividend yield 0.22 % 0.44 %
Summary of Company's Stock Option Activities	A summary of the activity in the stock option plans for the six months ended June 30, 2015 follows: Shares Weighted Weighted Aggregate Outstanding at beginning of year 1,210,660 $ 11.32 6.53 $ 7,244 Granted 210,782 20.62 Exercised (77,600 ) 11.52 Forfeited, expired, or cancelled (2,108 ) 18.56 Outstanding at period end 1,341,734 $ 12.75 6.58 $ 13,077 Vested or expected to vest 1,274,647 $ 12.75 6.58 $ 12,423 Exercisable at period end 811,299 $ 10.73 5.23 $ 9,550
Summary of Activity for Nonvested Restricted Share Awards	A summary of activity for non-vested restricted share awards for the six months ended June 30, 2015 is as follows: Non-vested Shares Shares Weighted-Average Non-vested at beginning of year 102,710 $ 13.93 Granted 31,938 20.69 Vested (11,705 ) 13.61 Forfeited (1,243 ) 16.29 Non-vested at period end 121,700 $ 15.73

Regulatory Capital Matters (Tab

Regulatory Capital Matters (Tables)	6 Months Ended
	Jun. 30, 2015
Banking and Thrift [Abstract]
Actual and Required Capital Amounts and Ratios	The Company’s and Bank’s actual capital amounts and ratios are presented in the following table (in thousands): Actual Minimum Capital Excess Amount Ratio Amount Ratio June 30, 2015 Company common equity Tier 1 capital to risk-weighted assets $ 152,941 12.29 % $ 56,006 4.50 % $ 96,935 Company total capital to risk-weighted assets $ 168,019 13.50 % $ 99,566 8.00 % $ 68,453 Company Tier 1 capital to risk-weighted assets $ 160,003 12.86 % $ 74,674 6.00 % $ 85,329 Company Tier 1 capital to average assets $ 160,003 10.19 % $ 63,377 4.00 % $ 96,626 Bank common equity Tier 1 capital to risk-weighted assets $ 150,511 12.11 % $ 55,949 4.50 % $ 94,562 Bank total capital to risk-weighted assets $ 158,527 12.75 % $ 99,465 8.00 % $ 59,062 Bank Tier 1 capital to risk-weighted assets $ 150,511 12.11 % $ 74,599 6.00 % $ 75,912 Bank Tier 1 capital to average assets $ 150,511 9.59 % $ 62,785 4.00 % $ 87,726 December 31, 2014 Company total capital to risk-weighted assets $ 114,475 12.30 % $ 74,464 8.00 % $ 40,011 Company Tier 1 capital to risk-weighted assets $ 107,795 11.58 % $ 37,232 4.00 % $ 70,563 Company Tier 1 capital to average assets $ 107,795 8.57 % $ 50,291 4.00 % $ 57,504 Bank total capital to risk-weighted assets $ 113,830 12.23 % $ 74,447 8.00 % $ 39,383 Bank Tier 1 capital to risk-weighted assets $ 107,150 11.51 % $ 37,223 4.00 % $ 69,927 Tier 1 capital to average assets $ 107,150 8.52 % $ 50,279 4.00 % $ 56,871

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2015
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 $ — $ 14,198 $ — Mortgage-backed securities-residential — 512,110 — Mortgage-backed securities-commercial — 20,189 — State and political subdivisions — 88,687 — Total securities available for sale $ — $ 635,184 $ — Loans held for sale $ — $ 16,842 $ — Mortgage banking derivatives $ — $ 242 $ — Financial Liabilities Mortgage banking derivatives $ — $ 16 $ — Fair Value Measurements at Quoted Prices Significant Significant Financial Assets Securities available for sale U.S. government sponsored entities and agencies $ — $ 30,173 $ — U.S. Treasury Bills 20,000 — — Mortgage-backed securities-residential — 339,067 — Mortgage-backed securities-commercial — 6,465 — State and political subdivisions — — — Total securities available for sale $ 20,000 $ 375,705 $ — Loans held for sale $ — $ 18,462 $ — Mortgage banking derivatives $ — $ 285 $ — Financial Liabilities Mortgage banking derivatives $ — $ 132 $ —
Carrying Amount and Estimated Fair Value of Financial Instruments	The carrying amounts and estimated fair values of financial instruments, at June 30, 2015 and December 31, 2014 are as follows: Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 43,163 $ 43,163 $ — $ — $ 43,163 Securities available for sale 635,184 — 635,184 — 635,184 Certificates of deposit held at other financial institutions 250 — 250 — 250 Securities held to maturity 46,815 — 46,885 — 46,885 Loans held for sale 16,842 — 16,842 — 16,842 Net loans 954,175 — — 953,829 953,829 Restricted equity securities 7,685 n/a n/a n/a n/a Servicing rights, net 3,298 — 4,679 — 4,679 Accrued interest receivable 4,886 6 2,257 2,623 4,886 Financial liabilities Deposits $ 1,491,986 $ 940,917 $ 557,906 $ — $ 1,498,823 Federal funds purchased and repurchase agreements 36,567 — 36,567 — 36,567 Federal Home Loan Bank advances 57,000 — 57,152 — 57,152 Accrued interest payable 578 47 531 — 578 Carrying Fair Value Measurements at Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 49,347 $ 49,347 $ — $ — $ 49,347 Securities available for sale 395,705 20,000 375,705 — 395,705 Certificates of deposit held at other financial institutions 250 — 250 — 250 Securities held to maturity 53,332 — 53,741 — 53,741 Loans held for sale 18,462 — 18,462 — 18,462 Net loans 780,508 — — 782,745 782,745 Restricted equity securities 5,349 n/a n/a n/a n/a Servicing rights, net 3,053 — 4,180 — 4,180 Accrued interest receivable 3,545 — 1,368 2,177 3,545 Financial liabilities Deposits $ 1,172,233 $ 848,158 $ 326,644 $ — $ 1,174,802 Federal funds purchased and repurchase agreements 39,078 — 39,078 — 39,078 Federal Home Loan Bank advances 19,000 — 19,146 — 19,146 Accrued interest payable 421 33 388 — 421

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Computation of Earning per Share	The factors used in the earnings per share computation follow: Three Months Ended 2015 2014 Basic Net income available to common shareholders $ 3,109 $ 2,010 Less: earnings allocated to participating securities (34 ) (20 ) Net income allocated to common shareholders $ 3,075 $ 1,990 Weighted average common shares outstanding including participating securities 10,490,972 4,889,873 Less: Participating securities (116,103 ) (49,356 ) Average shares 10,374,869 4,840,517 Basic earnings per common share $ 0.30 $ 0.41 Diluted Net income allocated to common shareholders $ 3,075 $ 1,990 Weighted average common shares outstanding for basic earnings per common share 10,374,869 4,840,517 Add: Dilutive effects of assumed exercises of stock options 457,613 127,848 Add: Dilutive effects of assumed exercises of stock warrants 12,785 3,542 Average shares and dilutive potential common shares 10,845,267 4,971,907 Dilutive earnings per common share $ 0.28 $ 0.40 Six Months Ended 2015 2014 Basic Net income available to common shareholders $ 6,216 $ 3,514 Less: earnings allocated to participating securities (73 ) (28 ) Net income allocated to common shareholders $ 6,143 $ 3,486 Weighted average common shares outstanding including participating securities 9,237,574 4,876,347 Less: Participating securities (109,183 ) (38,325 ) Average shares 9,128,391 4,838,022 Basic earnings per common share $ 0.67 $ 0.72 Diluted Net income allocated to common shareholders $ 6,143 $ 3,486 Weighted average common shares outstanding for basic earnings per common share 9,128,391 4,838,022 Add: Dilutive effects of assumed exercises of stock options 445,611 124,728 Add: Dilutive effects of assumed exercises of stock warrants 12,882 3,542 Average shares and dilutive potential common shares 9,586,884 4,966,292 Dilutive earnings per common share $ 0.64 $ 0.70

Capital Offering (Tables)

Capital Offering (Tables)	6 Months Ended
	Jun. 30, 2015
Text Block [Abstract]
Schedule of Net Proceeds	Net proceeds were as follows: Gross proceeds $ 55,440 Less: stock offering costs (5,015 ) Net proceeds from issuance of common stock $ 50,425

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Jul. 01, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill				$ 9,124		$ 9,124
Acquisition related costs			$ 965		$ 1,481
Dissenting Preferred Shares [Member]
Business Acquisition [Line Items]
Common stock issued	7,427
MidSouth Bank [Member]
Business Acquisition [Line Items]
Acquisition completed date				Jul. 1, 2014
Name of the acquired entity				MidSouth Bank
Acquisition agreement date				Nov. 19, 2013
Goodwill	$ 9,124
Business acquisition, percentage of shares acquired	100.00%
Lieu of fractional shares description				In lieu of issuing fractional shares of FFN common stock, FFN paid former MidSouth shareholders an amount in cash determined by multiplying (i) $13.50 by (ii) the fraction of a share (rounded to the nearest ten thousandth when expressed in decimal form) of FFN common stock.
Common stock issued	2,766,191
Total consideration paid	$ 41,094
Loans acquired at fair value	184,345	$ 184,345	$ 184,345		$ 184,345
Estimated discount to outstanding principal loan balance, value		$ 7,347
Estimated discount to outstanding principal loan balance, percentage		3.80%
Loans acquired, percentage		38.00%	38.00%		38.00%
Core deposit intangible	$ 3,060
Increase in interest income			$ 3,297		$ 6,605
Increase in net income available to common shareholders			$ 207		$ 584
MidSouth Bank [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Shares received by acquiree	$ 0.425926
MidSouth Bank [Member] | Preferred Stock [Member]
Business Acquisition [Line Items]
Shares received by acquiree	$ 0.851852
MidSouth Bank [Member] | Dissenting Preferred Shares [Member]
Business Acquisition [Line Items]
Cash consideration paid	$ 100
MidSouth Bank [Member] | Fractional Shares [Member]
Business Acquisition [Line Items]
Cash consideration paid	18
MidSouth Bank [Member] | Core Deposit Intangibles [Member]
Business Acquisition [Line Items]
Core deposit intangible	$ 3,060
Estimated economic life				8 years 2 months 12 days
MidSouth Bank [Member] | Series 2009-A Stock Warrants [Member]
Business Acquisition [Line Items]
Shares received by acquiree	$ 0.18
Common stock issued	36,000
MidSouth Bank [Member] | Series 2011-A Stock Warrant [Member]
Business Acquisition [Line Items]
Shares received by acquiree	$ 0.146667
PCI Loans [Member]
Business Acquisition [Line Items]
Acquired loans with credit impaired				$ 4,278		$ 4,315
PCI Loans [Member] | MidSouth Bank [Member]
Business Acquisition [Line Items]
Acquired loans with credit impaired				$ 5,527

Acquisitions - Summary of Purch

Acquisitions - Summary of Purchase Price Calculation (Detail) - Jul. 01, 2014 $ / shares in Units, $ in Thousands	USD ($)$ / sharesshares
MidSouth Bank [Member]
Business Acquisition [Line Items]
Total FFN common shares exchanged, net	2,766,191
Total Stock Consideration-Fair value of FFN common stock issued | $	$ 40,110
Fair value of FFN stock options granted to MidSouth option holders | $	866
Total acquisition consideration | $	$ 41,094
MidSouth Bank [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Common shares, number of MidSouth shares Outstanding	3,873,000
Purchase price, per share exchange Ratio	0.425926
Total FFN common shares exchanged, net	1,650,000
Multiplied by FFN common stock value per share | $ / shares	$ 14,500
MidSouth Bank [Member] | Convertible Voting Preferred Stock, 2009-A [Member]
Business Acquisition [Line Items]
Convertible voting preferred stock, number of MidSouth shares outstanding	1,018,000
Purchase price, per share exchange Ratio	0.851852
Total FFN common shares exchanged, net	867,000
MidSouth Bank [Member] | Convertible Voting Preferred Stock, 2011-A [Member]
Business Acquisition [Line Items]
Convertible voting preferred stock, number of MidSouth shares outstanding	242,000
Purchase price, per share exchange Ratio	0.851852
Total FFN common shares exchanged, net	206,000
MidSouth Bank [Member] | Series 2009-A Stock Warrants [Member]
Business Acquisition [Line Items]
Stock warrants, number of MidSouth Shares Outstanding	193,000
Purchase price, per share exchange Ratio	0.185185
Total FFN common shares exchanged, net	36,000
MidSouth Bank [Member] | Series 2011-A Stock Warrants [Member]
Business Acquisition [Line Items]
Stock warrants, number of MidSouth Shares Outstanding	44,000
Purchase price, per share exchange Ratio	0.153333
Total FFN common shares exchanged, net	7,000
Fractional Shares [Member] | MidSouth Bank [Member]
Business Acquisition [Line Items]
Cash consideration paid | $	$ 18
Dissenting Preferred Shares [Member]
Business Acquisition [Line Items]
Total FFN common shares exchanged, net	7,427
Dissenting Preferred Shares [Member] | MidSouth Bank [Member]
Business Acquisition [Line Items]
Cash consideration paid | $	$ 100

Acquisitions - Summary of Pur30

Acquisitions - Summary of Purchase Price Calculation (Parenthetical) (Detail) - MidSouth Bank [Member]	Jul. 01, 2014$ / shares
Series 2009-A Stock Warrants [Member]
Business Acquisition [Line Items]
Stock warrants strike price	$ 3.25
Series 2011-A Stock Warrants [Member]
Business Acquisition [Line Items]
Stock warrants strike price	$ 3.68

Acquisitions - Summary of Preli

Acquisitions - Summary of Preliminary Estimates of Fair Value of the Assets Purchased, Including Goodwill and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jul. 01, 2014	Jun. 30, 2014
Assets:
Goodwill	$ 9,124	$ 9,124
MidSouth Bank [Member]
Assets:
Cash and due from banks			$ 1,369
Interest-bearing accounts at other financial institutions			10,946
Securities, available-for-sale			57,431
Loans held for sale			7,071
Loans			184,345	$ 184,345
Certificates of deposit at other financial institutions			250
Restricted equity securities			1,572
Bank premises and equipment, net			6,650
Bank-owned life insurance			3,144
Accrued interest receivable			728
Foreclosed assets			540
Core deposit intangible			3,060
Deferred tax asset			6,853
Goodwill			9,124
Other assets			747
Total assets acquired			293,830
Deposits			244,415
Short-term borrowings			6,893
Other liabilities			1,428
Total liabilities assumed			252,736
MidSouth Bank [Member] | As Initially Reported [Member]
Assets:
Cash and due from banks			1,369
Interest-bearing accounts at other financial institutions			10,946
Securities, available-for-sale			57,431
Loans held for sale			7,071
Loans			184,345
Certificates of deposit at other financial institutions			250
Restricted equity securities			1,572
Bank premises and equipment, net			6,650
Bank-owned life insurance			3,144
Accrued interest receivable			728
Foreclosed assets			800
Core deposit intangible			3,060
Deferred tax asset			6,753
Goodwill			8,964
Other assets			747
Total assets acquired			293,830
Deposits			244,415
Short-term borrowings			6,893
Other liabilities			1,428
Total liabilities assumed			252,736
MidSouth Bank [Member] | Measurement Period Adjustments [Member]
Assets:
Foreclosed assets			(260)
Deferred tax asset			100
Goodwill			$ 160

Acquisitions - Contractually Re

Acquisitions - Contractually Required Principal and Interest Cash Payments, Management's Estimates of Expected Total Cash Payments (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jul. 01, 2014
Business Acquisition [Line Items]
Contractually required principal and interest	$ 6,000	$ 6,135	$ 6,532
Non-accretable difference	$ (973)	$ (989)	$ (1,270)
MidSouth Bank [Member]
Business Acquisition [Line Items]
Contractually required principal and interest				$ 8,510
Non-accretable difference				(1,745)
Cash flows expected to be collected				6,765
Accretable yield				(1,238)
Total purchased credit-impaired loans acquired				$ 5,527

Acquisitions - Summary of Fair

Acquisitions - Summary of Fair Value of Acquired Loans and Unpaid Principal Balance (Detail) - MidSouth Bank [Member] $ in Thousands	Jul. 01, 2014USD ($)
Unpaid Principal Value [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	$ 191,692
Unpaid Principal Value [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	39,425
Unpaid Principal Value [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	82,465
Unpaid Principal Value [Member] | Construction and Land Development [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	43,766
Unpaid Principal Value [Member] | Commercial Loans [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	16,311
Unpaid Principal Value [Member] | Consumer and Other Loans [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	1,865
Unpaid Principal Value [Member] | Purchased Credit Impaired [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	7,860
Fair Value [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	184,345
Fair Value [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	38,618
Fair Value [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	80,566
Fair Value [Member] | Construction and Land Development [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	42,454
Fair Value [Member] | Commercial Loans [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	15,352
Fair Value [Member] | Consumer and Other Loans [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	1,828
Fair Value [Member] | Purchased Credit Impaired [Member]
Business Acquisition [Line Items]
Unpaid principal amount and Fair value of acquired loans	$ 5,527

Acquisitions - Pro-Forma Financ

Acquisitions - Pro-Forma Financial Information and Actual Results of Acquisition (Detail) - Jun. 30, 2014 - MidSouth Bank [Member] - USD ($) $ / shares in Units, $ in Thousands	Total	Total
Business Acquisition [Line Items]
Net interest income	$ 10,645	$ 21,048
Net income available to common shareholders	$ 2,217	$ 4,098
Earnings per share-basic	$ 0.29	$ 0.53
Earnings per share-diluted	$ 0.28	$ 0.52

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Fair Value of Available for Sale Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 636,046	$ 392,179
Gross Unrealized Gains	3,896	5,043
Gross Unrealized Losses	(4,758)	(1,517)
Fair Value	635,184	395,705
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,236	30,070
Gross Unrealized Gains	154	417
Gross Unrealized Losses	(192)	(314)
Fair Value	14,198	30,173
Mortgage-Backed Securities: Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	512,479	335,677
Gross Unrealized Gains	3,617	4,593
Gross Unrealized Losses	(3,986)	(1,203)
Fair Value	512,110	339,067
Mortgage-Backed Securities: Commercial [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,303	6,432
Gross Unrealized Gains	35	33
Gross Unrealized Losses	(149)
Fair Value	20,189	6,465
State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	89,028
Gross Unrealized Gains	90
Gross Unrealized Losses	(431)
Fair Value	$ 88,687
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		20,000
Fair Value		$ 20,000

Securities - Schedule of Amorti

Securities - Schedule of Amortized Cost and Fair Value of Held to Maturity Securities Portfolio (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 46,815	$ 53,332
Gross Unrecognized Gains	749	1,068
Gross Unrecognized Losses	(679)	(659)
Fair Value	46,885	53,741
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,374	5,550
Gross Unrecognized Gains	15	162
Gross Unrecognized Losses	(102)	(87)
Fair Value	3,287	5,625
Mortgage-Backed Securities: Residential [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	34,551	38,587
Gross Unrecognized Gains	486	555
Gross Unrecognized Losses	(548)	(562)
Fair Value	34,489	38,580
State and Political Subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	8,890	9,195
Gross Unrecognized Gains	248	351
Gross Unrecognized Losses	(29)	(10)
Fair Value	$ 9,109	$ 9,536

Securities - Summary of Sales a

Securities - Summary of Sales and Calls of Available for Sale Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Available-for-sale Securities [Abstract]
Proceeds	$ 22,999	$ 18,922	$ 34,288	$ 24,373
Gross gains		201	390	225
Gross losses	$ (1)	$ (138)	$ (15)	$ (154)

Securities - Summary of Calls o

Securities - Summary of Calls of Held to Maturity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Held-to-maturity Securities [Abstract]
Proceeds	$ 1,500		$ 2,300
Gross gains	110		149
Gross losses	$ 0	$ 0	$ 0	$ 0

Securities - Schedule of Amor39

Securities - Schedule of Amortized Cost and Fair Value of Investment Securities Portfolio by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Available for sale
Fair Value, Three months or less	$ 0
Fair Value, Over three months through one year	0
Fair Value, Over one year through five years	0
Fair Value, Over five years through ten years	9,862
Fair Value, Over ten years	93,023
Mortgage-backed securities: residential	512,110
Mortgage-backed securities: commercial	20,189
Fair Value, Total	635,184	$ 395,705
Held to maturity
Fair Value, Three months or less	0
Over three months through one year	0
Fair Value, Over one year through five years	1,439
Fair Value, Over five years through ten years	1,122
Fair Value, Over ten years	9,835
Fair Value, Mortgage-backed securities: residential	34,489
Fair Value, Total	46,885	53,741
Available for sale
Amortized Cost, Three months or less	0
Amortized Cost, Over three months through one year	0
Amortized Cost, Over one year through five years	0
Amortized Cost, Over five years through ten years	9,711
Amortized Cost, Over ten years	93,553
Amortized Cost	636,046	392,179
Held to maturity
Amortized Cost, Three months or less	0
Amortized Cost, Over three months through one year	0
Amortized Cost, Over one year through five years	1,382
Amortized Cost, Over five years through ten years	1,106
Amortized Cost, Over ten years	9,776
Amortized Cost, Mortgage-backed securities: residential	34,551
Amortized Cost	46,815	53,332
Mortgage-Backed Securities: Residential [Member]
Available for sale
Fair Value, Total	512,110	339,067
Held to maturity
Fair Value, Total	34,489	38,580
Available for sale
Mortgage-backed securities:	512,479
Amortized Cost	512,479	335,677
Held to maturity
Amortized Cost	34,551	38,587
Mortgage-Backed Securities: Commercial [Member]
Available for sale
Fair Value, Total	20,189	6,465
Available for sale
Mortgage-backed securities:	20,303
Amortized Cost	$ 20,303	$ 6,432

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	Jun. 30, 2015USD ($)Securities	Dec. 31, 2014USD ($)Securities
Marketable Securities [Line Items]
Carrying value of pledged securities | $	$ 479,240	$ 366,764
Other than US Government Sponsored Entities and Agencies [Member]
Marketable Securities [Line Items]
Amount of holdings of securities of any one issuer	0	0

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Losses and Fair Value by Major Security Type (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Schedule Of Held To Maturity And Available For Sale Securities [Line Items]
Less Than 12 Months Available for Sale Fair Value	$ 337,777	$ 69,077
Less Than 12 Months Available for sale Unrealized Losses	(3,623)	(324)
12 Months or Longer Available for sale Fair Value	35,013	50,171
12 Months or Longer Available for sale Unrealized Losses	(1,135)	(1,193)
Available for sale Fair Value, Total	372,790	119,248
Available for sale Unrealized Losses, Total	(4,758)	(1,517)
Less Than 12 Months Held to maturity Fair Value	14,822	5,753
Less Than 12 Months Held to maturity Unrealized Losses	(189)	(26)
12 Months or Longer Held to maturity Fair Value	10,294	16,506
12 Months or Longer Held to maturity Unrealized Losses	(490)	(633)
Held to maturity Fair Value, Total	25,116	22,259
Held to maturity Unrealized Losses, Total	(679)	(659)
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	1,933	9,999
Less Than 12 Months Available for sale Unrealized Losses	(67)	(1)
12 Months or Longer Available for sale Fair Value	4,325	8,232
12 Months or Longer Available for sale Unrealized Losses	(125)	(313)
Available for sale Fair Value, Total	6,258	18,231
Available for sale Unrealized Losses, Total	(192)	(314)
Less Than 12 Months Held to maturity Fair Value	1,942
Less Than 12 Months Held to maturity Unrealized Losses	(58)
12 Months or Longer Held to maturity Fair Value	956	2,913
12 Months or Longer Held to maturity Unrealized Losses	(44)	(87)
Held to maturity Fair Value, Total	2,898	2,913
Held to maturity Unrealized Losses, Total	(102)	(87)
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	259,366	59,078
Less Than 12 Months Available for sale Unrealized Losses	(2,976)	(323)
12 Months or Longer Available for sale Fair Value	30,688	41,939
12 Months or Longer Available for sale Unrealized Losses	(1,010)	(880)
Available for sale Fair Value, Total	290,054	101,017
Available for sale Unrealized Losses, Total	(3,986)	(1,203)
Less Than 12 Months Held to maturity Fair Value	8,909	5,246
Less Than 12 Months Held to maturity Unrealized Losses	(102)	(25)
12 Months or Longer Held to maturity Fair Value	9,338	13,001
12 Months or Longer Held to maturity Unrealized Losses	(446)	(537)
Held to maturity Fair Value, Total	18,247	18,247
Held to maturity Unrealized Losses, Total	(548)	(562)
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	16,148
Less Than 12 Months Available for sale Unrealized Losses	(149)
Available for sale Fair Value, Total	16,148
Available for sale Unrealized Losses, Total	(149)
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	60,330
Less Than 12 Months Available for sale Unrealized Losses	(431)
Available for sale Fair Value, Total	60,330
Available for sale Unrealized Losses, Total	(431)
Less Than 12 Months Held to maturity Fair Value	3,971	507
Less Than 12 Months Held to maturity Unrealized Losses	(29)	(1)
12 Months or Longer Held to maturity Fair Value		592
12 Months or Longer Held to maturity Unrealized Losses		(9)
Held to maturity Fair Value, Total	3,971	1,099
Held to maturity Unrealized Losses, Total	$ (29)	$ (10)

Loans - Summary of Loans (Detai

Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 959,589		$ 783,932
Deferred loan fees, net	(1,676)		(1,059)
Total loans that are not PCI loans	957,913		782,873
Allowance for loan losses	(8,016)	$ (7,308)	(6,680)	$ (5,771)	$ (5,304)	$ (4,900)
Net loans	954,175		780,508
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Construction and land development	293,629		239,225
Allowance for loan losses	(2,567)	(2,549)	(2,690)	(1,796)	(1,546)	(1,497)
Commercial Real Estate Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonfarm, nonresidential	273,221		240,975
Commercial Real Estate, Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other	6,370		5,377
Real Estate Residential Closed-end 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Closed-end 1-4 family	137,815		130,631
Residential Real Estate, Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other	96,292		83,129
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	144,735		76,570
Allowance for loan losses	(1,324)	(850)	(650)	(508)	(464)	(337)
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer and other	7,527		8,025
Allowance for loan losses	(65)	$ (58)	(55)	$ (53)	$ (63)	$ (98)
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,278		4,315
PCI Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	77		77
PCI Loans [Member] | Commercial Real Estate Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,752		1,798
PCI Loans [Member] | Real Estate Residential Closed-end 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	703		706
PCI Loans [Member] | Residential Real Estate, Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	107		108
PCI Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,639		1,624
PCI Loans [Member] | Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans			$ 2

Loans - Activity in Allowance f

Loans - Activity in Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 7,308	$ 5,304	$ 6,680	$ 4,900
Provision for loan losses	805	440	1,430	825
Loans charged-off	(105)		(105)
Recoveries	8	27	11	46
Total ending allowance balance	8,016	5,771	8,016	5,771
Construction and Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,549	1,546	2,690	1,497
Provision for loan losses	18	250	(123)	299
Total ending allowance balance	2,567	1,796	2,567	1,796
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,124	1,695	1,494	1,566
Provision for loan losses	197	159	827	288
Total ending allowance balance	2,321	1,854	2,321	1,854
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,727	1,536	1,791	1,402
Provision for loan losses	24	(3)	(43)	112
Loans charged-off	(17)		(17)
Recoveries	5	27	8	46
Total ending allowance balance	1,739	1,560	1,739	1,560
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	850	464	650	337
Provision for loan losses	474	44	674	171
Total ending allowance balance	1,324	508	1,324	508
Consumer and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	58	63	55	98
Provision for loan losses	92	(10)	95	(45)
Loans charged-off	(88)		(88)
Recoveries	3		3
Total ending allowance balance	$ 65	$ 53	$ 65	$ 53

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($)	Jun. 30, 2015	Dec. 31, 2014	Jul. 01, 2014	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid principal amount	$ 3,619,000	$ 2,533,000
Non PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated credit discount	2,875,000		$ 5,014,000
Estimated fair value	111,284,000		178,818,000
Unpaid principal amount	114,159,000		$ 183,832,000
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses for PCI loans	$ 0	$ 0		$ 0

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 ($)	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Individually evaluated for impairment	$ 119,000		$ 18,000
Allowance for loan losses, Collectively evaluated for impairment	7,897,000		6,662,000
Total ending allowance balance	8,016,000	$ 7,308,000	6,680,000	$ 5,771,000	$ 5,304,000	$ 4,900,000
Loans, Individually evaluated for impairment	2,032,000		946,000
Loans, Collectively evaluated for impairment	957,557,000		782,986,000
Aging of Recorded Investment, Total	963,867,000		788,247,000
PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	0		0	0
Purchased credit-impaired loans	4,278,000		4,315,000
Construction and Land Development [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	2,567,000		2,690,000
Total ending allowance balance	2,567,000	2,549,000	2,690,000	1,796,000	1,546,000	1,497,000
Loans, Collectively evaluated for impairment	293,629,000		239,225,000
Aging of Recorded Investment, Total	293,706,000		239,302,000
Construction and Land Development [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	0		0
Purchased credit-impaired loans	77,000		77,000
Commercial Real Estate [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	2,321,000		1,494,000
Total ending allowance balance	2,321,000	2,124,000	1,494,000	1,854,000	1,695,000	1,566,000
Loans, Individually evaluated for impairment	927,000		835,000
Loans, Collectively evaluated for impairment	278,664,000		245,517,000
Aging of Recorded Investment, Total	281,343,000		248,150,000
Commercial Real Estate [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	0		0
Purchased credit-impaired loans	1,752,000		1,798,000
Residential Real Estate [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	1,739,000		1,791,000
Total ending allowance balance	1,739,000	1,727,000	1,791,000	1,560,000	1,536,000	1,402,000
Loans, Individually evaluated for impairment	807,000		93,000
Loans, Collectively evaluated for impairment	233,300,000		213,667,000
Aging of Recorded Investment, Total	234,917,000		214,574,000
Residential Real Estate [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	0		0
Purchased credit-impaired loans	810,000		814,000
Commercial and Industrial [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Individually evaluated for impairment	96,000		18,000
Allowance for loan losses, Collectively evaluated for impairment	1,228,000		632,000
Total ending allowance balance	1,324,000	850,000	650,000	508,000	464,000	337,000
Loans, Individually evaluated for impairment	275,000		18,000
Loans, Collectively evaluated for impairment	144,460,000		76,552,000
Aging of Recorded Investment, Total	146,374,000		78,194,000
Commercial and Industrial [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	0		0
Purchased credit-impaired loans	1,639,000		1,624,000
Consumer and Other [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Allowance for loan losses, Individually evaluated for impairment	23,000
Allowance for loan losses, Collectively evaluated for impairment	42,000		55,000
Total ending allowance balance	65,000	$ 58,000	55,000	$ 53,000	$ 63,000	$ 98,000
Loans, Individually evaluated for impairment	23,000
Loans, Collectively evaluated for impairment	7,504,000		8,025,000
Aging of Recorded Investment, Total	7,527,000		8,027,000
Consumer and Other [Member] | PCI Loans [Member]
Allowance For Loan Losses And Recorded Investment In Loans [Line Items]
Purchased credit-impaired loans	$ 0		0
Purchased credit-impaired loans			$ 2,000

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans by Class of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	$ 3,500		$ 3,500		$ 2,515
Unpaid Principal Balance	3,619		3,619		2,533
Recorded Investment, With no allowance recorded	1,913		1,913		928
Recorded Investment	2,032		2,032		946
Unpaid Principal Balance, With an allowance recorded	119		119		18
Recorded Investment, With an allowance recorded	119		119		18
Allowance for Loan Losses Allocated	119		119		18
Average Recorded Investment, With no allowance recorded	1,526		1,338	$ 603
Average Recorded Investment, With an allowance recorded	59	$ 1,670	38	2,166
Average Recorded Investment	1,585	1,670	1,376	2,769
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	179		179
Recorded Investment, With no allowance recorded	179		179
Unpaid Principal Balance, With an allowance recorded	96		96		18
Recorded Investment, With an allowance recorded	96		96		18
Allowance for Loan Losses Allocated	96		96		18
Average Recorded Investment, With no allowance recorded	110		104
Average Recorded Investment, With an allowance recorded	43	66	30	66
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With an allowance recorded	23		23
Recorded Investment, With an allowance recorded	23		23
Allowance for Loan Losses Allocated	23		23
Average Recorded Investment, With an allowance recorded	16		8
Commercial Real Estate Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	2,514		2,514		2,422
Recorded Investment, With no allowance recorded	927		927		835
Average Recorded Investment, With no allowance recorded	865		850	603
Average Recorded Investment, With an allowance recorded		1,375		1,375
Real Estate Residential Closed-end 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	97		97		93
Recorded Investment, With no allowance recorded	97		97		$ 93
Average Recorded Investment, With no allowance recorded	313		265
Average Recorded Investment, With an allowance recorded		$ 229		$ 725
Residential Real Estate, Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no allowance recorded	710		710
Recorded Investment, With no allowance recorded	710		710
Average Recorded Investment, With no allowance recorded	$ 238		$ 119

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	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Nonaccrual	$ 947	$ 835
Recorded Investment, Loans Past Due Over 90 Days		316
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	96
Recorded Investment, Loans Past Due Over 90 Days		$ 316
Commercial And Industrial Financing Receivable [Member]
Financing Receivable Recorded Investment Nonaccrual Loans [Line Items]
Recorded Investment, Nonaccrual	$ 16

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	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	$ 3,718	$ 2,233
Aging of Recorded Investment, Loans Not Past Due	955,871	781,699
Aging of Recorded Investment, Total	963,867	788,247
PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	4,278	4,315
Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	1,366	354
Aging of Recorded Investment, Loans Not Past Due	292,263	238,871
Aging of Recorded Investment, Total	293,706	239,302
Construction and Land Development [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	77	77
Commercial Real Estate Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	835	835
Aging of Recorded Investment, Loans Not Past Due	272,386	240,140
Aging of Recorded Investment, Total	274,973	242,773
Commercial Real Estate Financing Receivable [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	1,752	1,798
Commercial Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Loans Not Past Due	6,370	5,377
Aging of Recorded Investment, Total	6,370	5,377
Real Estate Residential Closed-end 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	665	780
Aging of Recorded Investment, Loans Not Past Due	137,150	129,851
Aging of Recorded Investment, Total	138,518	131,337
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	703	706
Residential Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	750	52
Aging of Recorded Investment, Loans Not Past Due	95,542	83,077
Aging of Recorded Investment, Total	96,399	83,237
Residential Real Estate, Other [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	107	108
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	79	212
Aging of Recorded Investment, Loans Not Past Due	144,656	76,358
Aging of Recorded Investment, Total	146,374	78,194
Commercial and Industrial [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans	1,639	1,624
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	23
Aging of Recorded Investment, Loans Not Past Due	7,504	8,025
Aging of Recorded Investment, Total	7,527	8,027
Consumer and Other [Member] | PCI Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, PCI Loans		2
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	2,770	705
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	1,328	354
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	630	299
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	710	52
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	79
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	23
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	113	377
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	38
60 to 89 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	35	165
60 to 89 Days Past Due [Member] | Residential Real Estate, Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	40
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		212
Greater Than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Aging of Recorded Investment, Total Past Due	835	1,151
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		$ 316

Loans - Summary of Risk Categor

Loans - Summary of Risk Category of Loans by Class of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Risk Category Of Loans [Line Items]
Total Loans	$ 963,867	$ 788,247
Construction and Land Development [Member]
Risk Category Of Loans [Line Items]
Total Loans	293,706	239,302
Commercial Real Estate Financing Receivable [Member]
Risk Category Of Loans [Line Items]
Total Loans	274,973	242,773
Commercial Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	6,370	5,377
Real Estate Residential Closed-end 1-4 Family [Member]
Risk Category Of Loans [Line Items]
Total Loans	138,518	131,337
Residential Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	96,399	83,237
Commercial and Industrial [Member]
Risk Category Of Loans [Line Items]
Total Loans	146,374	78,194
Consumer and Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	7,527	8,027
Pass [Member]
Risk Category Of Loans [Line Items]
Total Loans	955,868	780,761
Pass [Member] | Construction and Land Development [Member]
Risk Category Of Loans [Line Items]
Total Loans	293,629	239,225
Pass [Member] | Commercial Real Estate Financing Receivable [Member]
Risk Category Of Loans [Line Items]
Total Loans	271,384	239,584
Pass [Member] | Commercial Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	6,370	5,377
Pass [Member] | Real Estate Residential Closed-end 1-4 Family [Member]
Risk Category Of Loans [Line Items]
Total Loans	136,939	128,869
Pass [Member] | Residential Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	95,582	83,129
Pass [Member] | Commercial and Industrial [Member]
Risk Category Of Loans [Line Items]
Total Loans	144,460	76,552
Pass [Member] | Consumer and Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	7,504	8,025
Substandard [Member]
Risk Category Of Loans [Line Items]
Total Loans	7,999	7,486
Substandard [Member] | Construction and Land Development [Member]
Risk Category Of Loans [Line Items]
Total Loans	77	77
Substandard [Member] | Commercial Real Estate Financing Receivable [Member]
Risk Category Of Loans [Line Items]
Total Loans	3,589	3,189
Substandard [Member] | Real Estate Residential Closed-end 1-4 Family [Member]
Risk Category Of Loans [Line Items]
Total Loans	1,579	2,468
Substandard [Member] | Residential Real Estate, Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	817	108
Substandard [Member] | Commercial and Industrial [Member]
Risk Category Of Loans [Line Items]
Total Loans	1,914	1,642
Substandard [Member] | Consumer and Other [Member]
Risk Category Of Loans [Line Items]
Total Loans	$ 23	$ 2

Loans - Summary of Total Contra

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	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Contractually required principal and interest	$ 6,000	$ 6,135	$ 6,532
Non-accretable difference	(973)	(989)	(1,270)
Cash flows expected to be collected	5,027	5,146	5,262
Accretable yield	(749)	(840)	(947)
Carrying value of acquired loans	4,278	$ 4,306	4,315
Allowance for loan losses	0		0
Carrying value less allowance for loan losses	$ 4,278		$ 4,315

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	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Contractually required principal and interest	$ 6,000	$ 6,000	$ 6,135	$ 6,532
Non-accretable difference	(973)	(973)	(989)	(1,270)
Cash flows expected to be collected	5,027	5,027	5,146	5,262
Accretable yield	(749)	(749)	(840)	(947)
Carry value of acquired loans	4,278	4,278	$ 4,306	$ 4,315
Contractually required principal and interest, Effect of Acquisitions	0	0
Non-accretable difference, Effect of Acquisitions	0	0
Cash flows expected to be collected, Effect of Acquisitions	0	0
Accretable yield, Effect of Acquisitions	0	0
Carry value of acquired loans, Effect of Acquisitions	0	0
Contractually required principal and interest, Income Accretion	0	0
Non-accretable difference, Income Accretion	0	0
Cash flows expected to be collected, Income Accretion	0	0
Accretable yield, Income Accretion	133	190
Carry value of acquired loans, Income Accretion	133	190
Contractually required principal and interest, All other Adjustments	(135)	(532)
Non-accretable difference, All other Adjustments	16	297
Cash flows expected to be collected, All other Adjustments	(119)	(235)
Accretable yield, All other Adjustments	(42)	8
Carry value of acquired loans, All other Adjustments	$ (161)	$ (227)

Loan Servicing - Schedule of Lo

Loan Servicing - Schedule of Loans Serviced Not Reported as Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Loans Servicing For Institutional Investors [Line Items]
Loan servicing rights, at fair value	$ 445,816	$ 414,222
Collateralized Mortgage Backed Securities [Member]
Loans Servicing For Institutional Investors [Line Items]
Loan servicing rights, at fair value	$ 3,683	$ 3,986

Loan Servicing - Components of

Loan Servicing - Components of Net Loan Servicing Fees (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Transfers and Servicing [Abstract]
Loan servicing fees	$ 278	$ 236	$ 544	$ 463
Amortization of loan servicing fees	(218)	(148)	(441)	(363)
Change in impairment	0	0	0	0
Total	$ 60	$ 88	$ 103	$ 100

Loan Servicing - Additional Inf

Loan Servicing - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Transfers and Servicing [Abstract]
Fair value of servicing rights	$ 4,679	$ 4,180
Weighted average discount rate	10.50%	10.50%
Weighted average prepayment speed	9.20%	10.80%
Weighted average amortization period	6 years 9 months 7 days

Loan Servicing - Schedule of Es

Loan Servicing - Schedule of Estimated Amortization Expense (Detail) $ in Thousands	Jun. 30, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,015	$ 668
2,016	456
2,017	$ 456

Share-Based Payments - Addition

Share-Based Payments - Additional Information (Detail) - USD ($)	Jul. 01, 2014	Feb. 28, 2015	Jun. 30, 2014	Apr. 30, 2013	Apr. 30, 2010	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrants exercised						3,600	0
Cash proceeds on warrants exercised						$ 43,000
Aggregate intrinsic value of warrants exercised						$ 31,000
Trigger value of 2010 warrant, price per share						$ 15
Warrants, contingent redemption price						$ 1
Number of shares authorized for issuance						2,375,717
Exercise price of options						$ 12.75
Share-based compensation arrangements by share-based payment award, estimated grant date fair value	$ 14.50					$ 6.35	$ 2.44
Shares, Granted						210,782		181,680
Shares, Exercised						77,600		23,809
Shares, Forfeited, expired, or canceled						2,108		31,135
Exercise of stock options						$ 780,000
Intrinsic value of shares exercised						639,000
Unrecognized compensation cost, nonvested stock options						$ 1,756,000
Unrecognized compensation cost, period of recognition						1 year 9 months 18 days
2010 Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant shares issued						32,425
Warrant exercise price per share						$ 12
Warrants exercisable period						7 years
Warrants outstanding						28,277
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
MidSouth Bank [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangements by share-based payment award, estimated grant date fair value	$ 6.31
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense						$ 0
Shares, Exercised						71,965	119
Common Stock [Member] | MidSouth Bank [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock options converted	322,300
Options to purchase shares of common stock	137,280
Exercise price of options	$ 8.57
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, nonvested stock options						$ 1,677,000
Unrecognized compensation cost, period of recognition						3 years 8 months 12 days
Number of shares granted						87,374
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 - Fair Val

Share-Based Payments - Fair Value Assumptions of Stock Options (Detail)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	1.81%	2.24%
Expected term	7 years 6 months	7 years 6 months
Expected stock price volatility	25.00%	11.04%
Dividend yield	0.22%	0.44%

Share-Based Payments - Summary

Share-Based Payments - Summary of Company's Stock Option Activities (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares, Outstanding, Beginning Balance	1,210,660
Shares, Granted	210,782		181,680
Shares, Exercised	(77,600)		(23,809)
Shares, Forfeited, expired, or canceled	(2,108)		(31,135)
Shares, Outstanding, Ending Balance	1,341,734		1,210,660
Shares, Vested or expected to vest	1,274,647
Shares, Exercisable at period end	811,299
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 11.32
Weighted Average Exercise Price, Granted	20.62
Weighted Average Exercise Price, Exercised	11.52
Weighted Average Exercise Price, Forfeited, expired, or cancelled	18.56
Weighted Average Exercise Price, Outstanding, Ending Balance	12.75		$ 11.32
Weighted Average Exercise Price, Vested or expected to vest	12.75
Weighted Average Exercise Price, Exercisable at period end	$ 10.73
Weighted Average Remaining Contractual Term, beginning of year	6 years 6 months 29 days	6 years 6 months 11 days
Weighted Average Remaining Contractual Term, Vested or expected to vest	6 years 6 months 29 days
Weighted Average Remaining Contractual Term, Exercisable at period end	5 years 2 months 23 days
Aggregate Intrinsic Value, Outstanding, Beginning Balance	$ 7,244
Aggregate Intrinsic Value, Outstanding, Ending Balance	13,077		$ 7,244
Aggregate Intrinsic Value, Vested or expected to vest	12,423
Aggregate Intrinsic Value, Exercisable at period end	$ 9,550

Share-Based Payments - Summar59

Share-Based Payments - Summary of Activity for Nonvested Restricted Share Awards (Detail) - 6 months ended Jun. 30, 2015 - Restricted Stock [Member] - $ / shares	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Nonvested, Beginning Balance	102,710
Shares, Granted	31,938
Shares, Vested	(11,705)
Shares, Forfeited	(1,243)
Shares, Nonvested, Ending Balance	121,700
Weighted-Average Grant-Date Fair Value, Nonvested, Beginning Balance	$ 13.93
Weighted-Average Grant-Date Fair Value, Granted	20.69
Weighted-Average Grant-Date Fair Value, Vested	13.61
Weighted-Average Grant-Date Fair Value, Forfeited	16.29
Weighted-Average Grant-Date Fair Value, Nonvested, Ending Balance	$ 15.73

Regulatory Capital Matters - Ac

Regulatory Capital Matters - Actual and Required Capital Amounts and Ratios (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Bank common equity Tier 1 capital to risk weighted assets, Actual Amount	$ 152,941
Total capital to risk weighted assets	168,019	$ 114,475
Tier 1 capital to risk weighted assets, Actual Amount	160,003	107,795
Tier 1 capital to average assets, Actual Amount	$ 160,003	$ 107,795
Bank common equity Tier 1 capital to risk weighted assets	12.29%
Total capital to risk weighted assets, Actual Ratio	13.50%	12.30%
Tier 1 capital to risk weighted assets, Actual Ratio	12.86%	11.58%
Tier 1 capital to average assets, Actual Ratio	10.19%	8.57%
Bank common equity Tier 1 capital to risk weighted assets	$ 56,006
Total capital to risk weighted assets, Minimum capital requirement amount	99,566	$ 74,464
Tier 1 capital to risk weighted assets, Minimum capital requirement amount	74,674	37,232
Tier 1 capital to average assets, Minimum capital requirement amount	$ 63,377	$ 50,291
Bank common equity Tier 1 capital to risk weighted assets	4.50%
Total capital to risk weighted assets, Minimum capital requirement ratio	8.00%	8.00%
Tier 1 capital to risk weighted assets, Minimum capital requirement ratio	6.00%	4.00%
Tier 1 capital to average assets, Minimum capital requirement ratio	4.00%	4.00%
Bank common equity Tier 1 capital to risk weighted assets	$ 96,935
Bank total capital to risk-weighted assets, Excess amount	68,453	$ 40,011
Bank Tier 1 capital to risk-weighted assets, Excess amount	85,329	70,563
Bank Tier 1 capital to average assets, Excess amount	96,626	57,504
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Bank common equity Tier 1 capital to risk weighted assets, Actual Amount	150,511
Total capital to risk weighted assets	158,527	113,830
Tier 1 capital to risk weighted assets, Actual Amount	150,511	107,150
Tier 1 capital to average assets, Actual Amount	$ 150,511	$ 107,150
Bank common equity Tier 1 capital to risk weighted assets	12.11%
Total capital to risk weighted assets, Actual Ratio	12.75%	12.23%
Tier 1 capital to risk weighted assets, Actual Ratio	12.11%	11.51%
Tier 1 capital to average assets, Actual Ratio	9.59%	8.52%
Bank common equity Tier 1 capital to risk weighted assets	$ 55,949
Total capital to risk weighted assets, Minimum capital requirement amount	99,465	$ 74,447
Tier 1 capital to risk weighted assets, Minimum capital requirement amount	74,599	37,223
Tier 1 capital to average assets, Minimum capital requirement amount	$ 62,785	$ 50,279
Bank common equity Tier 1 capital to risk weighted assets	4.50%
Total capital to risk weighted assets, Minimum capital requirement ratio	8.00%	8.00%
Tier 1 capital to risk weighted assets, Minimum capital requirement ratio	6.00%	4.00%
Tier 1 capital to average assets, Minimum capital requirement ratio	4.00%	4.00%
Bank common equity Tier 1 capital to risk weighted assets	$ 94,562
Bank total capital to risk-weighted assets, Excess amount	59,062	$ 39,383
Bank Tier 1 capital to risk-weighted assets, Excess amount	75,912	69,927
Bank Tier 1 capital to average assets, Excess amount	$ 87,726	$ 56,871

Regulatory Capital Matters - Ad

Regulatory Capital Matters - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2015
Banking and Thrift [Abstract]
Description of dividend restriction pertaining to the dividends that the company could declare	13,836 plus any 2015 net profits retained to the date of declaration

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	$ 635,184	$ 395,705
Loans held for sale	16,842	18,462
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	14,198	30,173
Mortgage-Backed Securities: Residential [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	512,110	339,067
Mortgage-Backed Securities: Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	20,189	6,465
U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale		20,000
State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale	88,687
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale		20,000
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total securities available for sale		20,000
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	635,184	375,705
Loans held for sale	16,842	18,462
Mortgage banking derivatives	242	285
Mortgage banking derivatives	16	132
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	14,198	30,173
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	512,110	339,067
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	20,189	$ 6,465
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	$ 88,687

Fair Value - Additional informa

Fair Value - Additional information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Fair Value Measurements Of Financial Instruments [Line Items]
Change in fair value related to loans held for sale	$ 1,463,000	$ 1,567,000	$ 3,110,000	$ 2,351,000
Change in fair value of loans held for sale	(293,000)	329,000	(270,000)	538,000
Carrying amount of impaired loans with specific allocations	2,032,000		2,032,000		$ 946,000
Additional provision for loan losses	805,000	440,000	1,430,000	825,000
Foreclosed assets	206,000		206,000		715,000
Write-down value during period	0	0	0	0
Fair Value [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Carrying amount of impaired loans with specific allocations	0		0		$ 0
Changes Measurement [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Additional provision for loan losses	0	$ (20,000)	0	$ 46,000
Loans Held For Sale [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Unpaid principal balance of loans held for sale	$ 16,548,000		16,548,000
Change in fair value related to loans held for sale			$ 294,000
Maximum [Member] | Loans Held For Sale [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Term of loan			90 days

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	$ 43,163	$ 49,347	$ 26,054	$ 18,217
Securities available for sale	635,184	395,705
Certificates of deposit held at other financial institutions	250	250
Securities held to maturity, Carrying Amount	46,815	53,332
Securities held to maturity, Fair Value	46,885	53,741
Loans held for sale, Fair Value	16,842	18,462
Net loans, Carrying Amount	954,175	780,508
Servicing rights, net, Carrying Amount	3,298	3,053
Servicing rights, net, Fair Value	4,679	4,180
Accrued interest receivable	4,886	3,545
Deposits, Carrying Amount	1,491,986	1,172,233
Federal funds purchased and repurchase agreements, Carrying Amount	36,567	39,078
Federal Home Loan Bank advances, Carrying Amount	57,000	19,000
Accrued interest payable	578	421
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents , Fair Value	43,163	49,347
Securities available for sale	635,184	395,705
Certificates of deposit held at other financial institutions, Fair Value	250	250
Securities held to maturity, Fair Value	46,885	53,741
Loans held for sale, Fair Value	16,842	18,462
Net loans, Fair Value	953,829	782,745
Restricted equity securities, Fair Value	0	0
Servicing rights, net, Fair Value	4,679	4,180
Accrued interest receivable	4,886	3,545
Deposits, Fair Value	1,498,823	1,174,802
Federal funds purchased and repurchase agreements, Fair Value	36,567	39,078
Federal Home Loan Bank advances, Fair Value	57,152	19,146
Accrued interest payable	578	421
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	43,163	49,347
Securities available for sale		20,000
Restricted equity securities, Fair Value	0	0
Accrued interest receivable	6
Deposits, Fair Value	940,917	848,158
Accrued interest payable	47	33
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities available for sale	635,184	375,705
Certificates of deposit held at other financial institutions, Fair Value	250	250
Securities held to maturity, Fair Value	46,885	53,741
Loans held for sale, Fair Value	16,842	18,462
Restricted equity securities, Fair Value	0	0
Servicing rights, net, Fair Value	4,679	4,180
Accrued interest receivable	2,257	1,368
Deposits, Fair Value	557,906	326,644
Federal funds purchased and repurchase agreements, Fair Value	36,567	39,078
Federal Home Loan Bank advances, Fair Value	57,152	19,146
Accrued interest payable	531	388
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net loans, Fair Value	953,829	782,745
Restricted equity securities, Fair Value	0	0
Accrued interest receivable	2,623	2,177
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents, Carrying Amount	43,163	49,347
Securities available for sale	635,184	395,705
Certificates of deposit held at other financial institutions	250	250
Securities held to maturity, Carrying Amount	46,815	53,332
Loans held for sale, Carrying Amount	16,842	18,462
Net loans, Carrying Amount	954,175	780,508
Restricted equity securities, Carrying Amount	7,685	5,349
Servicing rights, net, Carrying Amount	3,298	3,053
Accrued interest receivable	4,886	3,545
Deposits, Carrying Amount	1,491,986	1,172,233
Federal funds purchased and repurchase agreements, Carrying Amount	36,567	39,078
Federal Home Loan Bank advances, Carrying Amount	57,000	19,000
Accrued interest payable	$ 578	$ 421

Earnings Per Share - Computatio

Earnings Per Share - Computation of Earnings per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basic
Net income available to common shareholders	$ 3,109	$ 2,010	$ 6,216	$ 3,514
Less: earnings allocated to participating securities	(34)	(20)	(73)	(28)
Net income allocated to common shareholders	$ 3,075	$ 1,990	$ 6,143	$ 3,486
Weighted average common shares outstanding including participating securities	10,490,972	4,889,873	9,237,574	4,876,347
Less: Participating securities	(116,103)	(49,356)	(109,183)	(38,325)
Average shares	10,374,869	4,840,517	9,128,391	4,838,022
Basic earnings per common share	$ 0.30	$ 0.41	$ 0.67	$ 0.72
Diluted
Net income allocated to common shareholders	$ 3,075	$ 1,990	$ 6,143	$ 3,486
Weighted average common shares outstanding for basic earnings per common share	10,374,869	4,840,517	9,128,391	4,838,022
Add: Dilutive effects of assumed exercises of stock options	457,613	127,848	445,611	124,728
Add: Dilutive effects of assumed exercises of stock warrants	12,785	3,542	12,882	3,542
Average shares and dilutive potential common shares	10,845,267	4,971,907	9,586,884	4,966,292
Dilutive earnings per common share	$ 0.28	$ 0.40	$ 0.64	$ 0.70

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Stock options to purchase shares of the Company's common stock	147,782	245,432	210,782	249,968

Capital Offering - Additional I

Capital Offering - Additional Information (Detail) - Mar. 26, 2015 - $ / shares	Total
Equity [Abstract]
Stock offering price per share in private placement	$ 21
Common shares issued	2,640,000

Capital Offering - Schedule of

Capital Offering - Schedule of Net Proceeds (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015USD ($)
Proceeds from Issuance or Sale of Equity [Abstract]
Gross proceeds	$ 55,440
Less: stock offering costs	(5,015)
Net proceeds from issuance of common stock	$ 50,425