First NBC Bank Holding (FNBCQ) 10-Q 9 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 01, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Trading Symbol	FNBC
Entity Registrant Name	First NBC Bank Holding Co
Entity Central Index Key	1,496,631
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		19,068,416

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 33,759	$ 32,484
Short-term investments	179,526	18,404
Investment in short-term receivables	182,945	237,135
Investment securities available for sale, at fair value	273,702	247,647
Investment securities held to maturity	83,319	89,076
Mortgage loans held for sale	2,647	1,622
Loans, net of allowance for loan losses of $53,076 and $42,336, respectively	3,065,778	2,731,928
Bank premises and equipment, net	58,549	52,881
Accrued interest receivable	11,919	11,451
Goodwill and other intangible assets	8,942	7,831
Investment in real estate properties	51,727	12,771
Investment in tax credit entities	172,259	140,913
Cash surrender value of bank-owned life insurance	48,342	47,289
Other real estate	4,575	5,549
Deferred tax asset	127,627	83,461
Other assets	39,851	30,175
Total assets	4,345,467	3,750,617
Deposits:
Noninterest-bearing	416,405	364,534
Interest-bearing	3,200,513	2,756,316
Total deposits	3,616,918	3,120,850
Repurchase agreements	93,775	117,991
Long-term borrowings	103,392	40,000
Accrued interest payable	7,503	6,650
Other liabilities	37,266	28,752
Total liabilities	3,858,854	3,314,243
Shareholders’ equity:
Common stock- par value $1 per share; 100,000,000 shares authorized; 19,068,301 shares issued and outstanding at September 30, 2015 and 18,576,488 shares issued and outstanding at December 31, 2014	19,068	18,576
Additional paid-in capital	242,376	239,528
Accumulated earnings	206,775	155,599
Accumulated other comprehensive loss, net	(19,543)	(19,737)
Total shareholders’ equity	486,611	436,372
Noncontrolling interest	2	2
Total equity	486,613	436,374	[1]
Total liabilities and equity	4,345,467	3,750,617
Convertible Preferred Stock Series C
Shareholders’ equity:
Preferred stock	0	4,471	[1]
Preferred Stock Series D
Shareholders’ equity:
Preferred stock	$ 37,935	$ 37,935	[1]
[1]	Balances as of December 31, 2013 and December 31, 2014 are audited.

CONSOLIDATED BALANCE SHEETS (U3

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Allowance for loan losses	$ 53,076	$ 42,336
Common stock, par value per share (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	19,068,301	18,576,488
Common stock, shares outstanding	19,068,301	18,576,488
Convertible Preferred Stock Series C
Preferred stock, share authorized	1,680,219	1,680,219
Preferred stock, share issued	0	364,983
Preferred stock, share outstanding	0	364,983
Preferred Stock Series D
Preferred stock, share authorized	37,935	37,935
Preferred stock, share issued	37,935	37,935
Preferred stock, share outstanding	37,935	37,935

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income:
Loans, including fees	$ 38,270	$ 34,664	$ 108,203	$ 99,160
Investment securities	2,193	2,323	6,512	7,053
Investment in short-term receivables	1,434	1,675	4,638	4,761
Short-term investments	130	6	288	48
Total interest income	42,027	38,668	119,641	111,022
Interest expense:
Deposits	11,476	10,268	32,382	29,921
Borrowings and securities sold under repurchase agreements	1,752	640	4,732	1,943
Total interest expense	13,228	10,908	37,114	31,864
Net interest income	28,799	27,760	82,527	79,158
Provision for loan losses	3,000	3,000	11,600	9,000
Net interest income after provision for loan losses	25,799	24,760	70,927	70,158
Noninterest income:
Service charges on deposit accounts	596	548	1,740	1,605
Investment securities gain (loss), net	0	79	(50)	135
Gain (loss) on assets sold, net	(273)	(76)	(262)	63
Gain on sale of loans, net	31	579	147	649
Cash surrender value income on bank-owned life insurance	349	352	1,054	748
State tax credits earned	495	597	1,682	2,358
Community Development Entity fees earned	183	109	439	984
ATM fee income	529	490	1,553	1,468
Other	(1,019)	356	655	1,316
Total non-interest income	891	3,034	6,958	9,326
Noninterest expense:
Salaries and employee benefits	7,122	6,456	21,718	17,795
Occupancy and equipment expenses	3,377	2,737	9,314	8,005
Professional fees	2,002	1,628	5,844	5,038
Taxes, licenses and FDIC assessments	1,536	1,240	4,468	3,782
Impairment of investment in tax credit entities	3,253	3,974	10,752	10,178
Write-down of foreclosed assets	29	1	129	187
Data processing	1,554	1,207	4,557	3,446
Advertising and marketing	727	685	2,418	1,819
Other	3,451	2,119	9,454	5,702
Total non-interest expense	23,051	20,047	68,654	55,952
Income before income taxes	3,639	7,747	9,231	23,532
Income tax benefit	(14,562)	(6,612)	(42,230)	(16,354)
Net income attributable to Company	18,201	14,359	51,461	39,886
Less preferred stock dividends	(95)	(95)	(285)	(285)
Less earnings allocated to participating securities	0	(275)	(302)	(764)
Income available to common shareholders	$ 18,106	$ 13,989	$ 50,874	$ 38,837
Earnings per common share – basic (in usd per share)	$ 0.97	$ 0.75	$ 2.72	$ 2.10
Earnings per common share - diluted (in usd per share)	$ 0.94	$ 0.73	$ 2.64	$ 2.04

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 18,201	$ 14,359	$ 51,461	$ 39,886
Fair value of derivative instruments designated as cash flow hedges:
Change in fair value of derivative instruments designated as cash flow hedges during the period, before tax	(7,778)	(1,742)	(5,088)	(10,509)
Less: reclassification adjustment for net losses included in net income from terminated cash flow hedges	253	0	792	0
Unrealized losses on cash flow hedges, before tax	(7,525)	(1,742)	(4,296)	(10,509)
Unrealized gains (losses) on investment securities:
Unrealized gains on investment securities arising during the period	3,622	440	4,094	10,164
Reclassification adjustment for losses included in net income	0	(79)	0	(135)
Amortization of unrealized net gain on securities transferred from available for sale to held to maturity	213	117	501	386
Unrealized gains on investment securities, before tax	3,835	478	4,595	10,415
Other comprehensive income (loss), before taxes	(3,690)	(1,264)	299	(94)
Income tax expense (benefit) related to items of other comprehensive income	(1,292)	(441)	105	(32)
Other comprehensive income (loss), net of tax	(2,398)	(823)	194	(62)
Comprehensive income	15,803	13,536	51,655	39,824
Comprehensive income attributable to preferred shareholders	(95)	(95)	(285)	(285)
Comprehensive income attributable to participating securities	0	(275)	(302)	(764)
Comprehensive income available to common shareholders	$ 15,708	$ 13,166	$ 51,068	$ 38,775

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-In Capital	Accumulated Earnings	Accumulated Other Comprehensive Income	Total Shareholders’ Equity	Non-Controlling Interest	Preferred Stock Series C	Preferred Stock Series D
Beginning Balance, Preferred Stock at Dec. 31, 2013	[1]								$ 4,471	$ 37,935
Beginning Balance at Dec. 31, 2013	[1]	$ 381,859	$ 18,514	$ 237,063	$ 100,389	$ (16,515)	$ 381,857	$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		39,886			39,886		39,886
Other comprehensive income		(62)				(62)	(62)
Share-based compensation		980		980			980
Stock option and director plans		845	61	784			845
Net tax benefit related to stock option plans		317		317			317
Preferred stock dividends		(285)			(285)		(285)
Ending Balance, Preferred Stock at Sep. 30, 2014									4,471	37,935
Ending Balance at Sep. 30, 2014		423,540	18,575	239,144	139,990	(16,577)	423,538	2
Beginning Balance, Preferred Stock at Dec. 31, 2014	[1]								4,471	37,935
Beginning Balance at Dec. 31, 2014	[1]	436,374	18,576	239,528	155,599	(19,737)	436,372	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		51,461			51,461		51,461
Other comprehensive income		194				194	194
Share-based compensation		528		528			528
Restricted stock awards compensation		(1,890)		(1,890)			(1,890)
Stock option and director plans		673	42	631			673
Warrants		150	15	135			150
Restricted stock awards, net		2,318	70	2,248			2,318
Net tax benefit related to stock option plans		200		200			200
Purchase of common shares by ESOP		(3,017)		(3,017)			(3,017)
Allocation of ESOP shares		(93)		(93)			(93)
Preferred stock conversion		0	365	4,106					(4,471)
Preferred stock dividends		(285)			(285)		(285)
Ending Balance, Preferred Stock at Sep. 30, 2015									$ 0	$ 37,935
Ending Balance at Sep. 30, 2015		$ 486,613	$ 19,068	$ 242,376	$ 206,775	$ (19,543)	$ 486,611	$ 2
[1]	Balances as of December 31, 2013 and December 31, 2014 are audited.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities
Net income	$ 51,461	$ 39,886
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred tax benefit	(44,379)	(16,354)
Impairment of tax credit investments	10,752	10,178
Accretion of fair value adjustments related to acquisition	(148)	(68)
Net discount accretion or premium amortization	166	340
Loss (gain) on sale of investment securities	50	(135)
Loss (gain) on assets sold	262	(63)
Write-down of foreclosed assets	129	187
Proceeds from sale of mortgage loans held for sale	34,702	52,913
Mortgage loans originated and held for sale	(35,727)	(50,431)
Gain on sale of loans	(147)	(649)
Loss on tax credit investment	757	0
Derivative losses on terminated interest rate hedge, net	2,118	0
Provision for loan losses	11,600	9,000
Depreciation and amortization	2,779	2,642
Share-based and other compensation expense	978	980
Increase in cash surrender value of bank-owned life insurance	(1,053)	(748)
Changes in operating assets and liabilities:
Change in other assets	(13,981)	(9,765)
Change in accrued interest receivable	(468)	(84)
Change in accrued interest payable	853	(139)
Change in other liabilities	4,253	(4,034)
Net cash provided by operating activities	24,957	33,656
Investing activities
Purchases of available for sale investment securities	(30,933)	(20,219)
Proceeds from sales of available for sale investment securities	0	41,901
Proceeds from maturities, prepayments, and calls of available for sale investment securities	18,569	19,802
Proceeds from sales of held to maturity securities	0	2,554
Proceeds from maturities, prepayments, and calls of held to maturity securities	6,006	2,065
Net change in investments in short-term receivables	54,190	5,985
Reimbursement of investment in tax credit entities	3,590	16,000
Purchases of investments in tax credit entities	(12,155)	(26,683)
Loans originated, net of repayments	(353,645)	(345,064)
Proceeds from sale of bank premises and equipment	240	242
Disposals of bank premises and equipment	214	0
Cash received in acquisition	31,517	0
Purchases of bank premises and equipment	(5,947)	(3,169)
Proceeds from disposition of real estate owned	2,742	2,622
Purchases of investment in real estate properties	(37,172)	0
Purchases of bank-owned life insurance	0	(20,000)
Net cash used in investing activities	(322,784)	(323,964)
Financing activities
Net change in repurchase agreements	(24,216)	37,473
Proceeds from borrowings	60,000	31,000
Proceeds from ESOP loan	3,392	0
Repayment of borrowings	0	(8,425)
Purchase of common stock by ESOP	(3,110)	0
Net increase in deposits	423,642	240,157
Proceeds from issuance of common stock	801	845
Dividends paid	(285)	(285)
Net cash provided by financing activities	460,224	300,765
Net change in cash, due from banks, and short-term investments	162,397	10,457
Cash, due from banks, and short-term investments at beginning of period	50,888	31,642
Cash, due from banks, and short-term investments at end of period	213,285	42,099
Supplemental Information for Non-Cash Investing Activities
Consolidation of Low-Income Housing Tax Credit entity	$ (28,269)	$ 0

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements of First NBC Bank Holding Company (Company) have been prepared in accordance with generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include information or footnotes necessary for a complete presentation of financial position, results of operations, and cash flows in conformity with generally accepted accounting principles. However, in the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the financial statements have been included. The results of operations for the three-month and nine -month periods ended September 30, 2015 are not necessarily indicative of the results that may be expected for the entire fiscal year. These statements should be read in conjunction with the Company’s audited financial statements, including the notes thereto, which were filed with the Securities and Exchange Commission as part of the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 . In preparing the financial statements, the Company is required to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Nature of Operations The Company is a bank holding company that offers a broad range of financial services through First NBC Bank, a Louisiana state non-member bank, to businesses, institutions, and individuals in southeastern Louisiana, the Mississippi Gulf Coast, and the Florida panhandle. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States and to prevailing practices within the banking industry. Correction of Immaterial Errors During the second quarter of 2015, the Company identified errors in the accounting for its investments in certain tax credit entities during its quarterly financial statement close process. The errors were corrected in the Company’s consolidated financial statements as of June 30, 2015 and for the three and six months then ended. The errors did not have a material impact on the consolidated financial statements for any prior periods as previously reported and were not material to the anticipated annual results for the year ending December 31, 2015. The Company has historically accounted for investments in tax credits entities using an amortized cost method over the related tax credit compliance period. The Company determined that based on its equity ownership structure in certain of these investments the equity method of accounting should have been applied. Under the equity method of accounting, the Company records its share of earnings (losses) as a component of noninterest expense and evaluates its investments in tax credit entities for impairment at the end of each reporting period. During the review of certain of its investments in tax credit entities, the Company also identified a single investment in a tax credit entity, determined to be a variable interest entity (VIE) that was not consolidated as required. The Company was deemed to have a controlling financial interest in the VIE because it had both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. During the second quarter of 2015, the Company utilized the guidance provided in Accounting Standards Codification (ASC) Topic 250 as well as SEC Staff Accounting Bulletins (SAB) No. 99 and No. 108. The guidance required the Company to evaluate and assess the materiality of these errors both qualitatively and quantitatively, and the Company concluded that these errors did not materially misstate previously issued financial statements for any prior periods. As a result, amendment of the Company’s previously filed Quarterly Reports on Form 10-Q and Annual Reports on Form 10-K was not required. Such changes were reflected in the financial results for the three and six month periods ended June 30, 2015 and are summarized as follows: For the Three Months Ended For the Three Months Ended For the Six Months Ended June 30, 2015 For the Six Months Ended June 30, 2015 (In thousands) Pre-Tax Net of tax Pre-Tax Net of tax Low-Income Housing (1) $ (253 ) $ (164 ) $ (353 ) $ (229 ) Federal Historic Rehabilitation (1) 177 115 358 232 Total investment in tax credit entities impairment (1) (76 ) (49 ) 5 3 Low-Income Housing investment VIE consolidation loss (2) (1,029 ) (669 ) (1,181 ) (768 ) Net loss impact of error corrections $ (1,105 ) $ (718 ) $ (1,176 ) $ (765 ) Basic earnings per share (3) $ (0.06 ) $ (0.04 ) $ (0.06 ) $ (0.04 ) (1) The amounts above represent the cumulative net impact of the reversal of previously recorded amortization and equity income or loss and impairment that should have been recorded on the Company's consolidated statement of income and balance sheets as of and for the three and six month periods ended June 30, 2015. (2) See Note 8 for the impact on the Company's consolidated balance sheets as of June 30, 2015. (3) The amounts above represent the net impact of the cumulative errors in accounting for certain of the Company's investments in tax credit entities on the calculation of earnings per share for the three and six month periods ended June 30, 2015. During the third quarter of 2015, the Company identified additional out of period errors related to the correction of immaterial errors associated with its investment in tax credit entities. The Company, in performing its impairment testing on its investment in tax credit entities as of September 30, 2015 identified errors in the calculation of impairment amounts recorded for its Low-Income Housing, Federal New Markets and State Historic Rehabilitation tax credit projects. The Company also identified additional depreciation and interest expense on the Low-Income Housing investment VIE in the prior period. The errors did not have a material impact on the consolidated financial statements for any prior periods as previously reported and were not material to the anticipated annual results for the year ending December 31, 2015. During the third quarter of 2015, the Company utilized the guidance provided in Accounting Standards Codification (ASC) Topic 250 as well as SEC Staff Accounting Bulletins (SAB) No. 99 and No. 108. The guidance required the Company to evaluate and assess the materiality of these errors both qualitatively and quantitatively, and the Company concluded that these errors did not materially misstate previously issued financial statements for any prior periods. As a result, amendment of the Company’s previously filed Quarterly Reports on Form 10-Q and Annual Reports on Form 10-K was not required. Such changes were reflected in the financial results for the three and nine month periods ended September 30, 2015 and are summarized as follows: For the Three Months Ended For the Three Months Ended For the Nine Months Ended September 30, 2015 For the Nine Months Ended September 30, 2015 (In thousands) Pre-Tax Net of tax Pre-Tax Net of tax Low-Income Housing (1) $ 7 $ 5 $ (346 ) $ (225 ) Federal & State Historic Rehabilitation (1) (199 ) (129 ) 358 233 Federal New Markets Tax Credits (1) 2,589 1,683 3,316 2,155 Total investment in tax credit entities impairment (1) 2,397 1,559 3,328 2,163 Low-Income Housing investment VIE consolidation loss (2) (610 ) (397 ) (1,791 ) (1,164 ) Net income impact of error corrections $ 1,787 $ 1,162 $ 1,537 $ 999 Basic earnings per share (3) $ 0.10 $ 0.06 $ 0.08 $ 0.05 (1) The amounts above represent the cumulative net impact of the reversal of previously recorded amortization and equity income or loss and impairment that should have been recorded on the Company's consolidated statement of income and balance sheets as of and for the three and nine month periods ended September 30, 2015. (2) See Note 8 for the impact on the Company's consolidated balance sheets as of September 30, 2015. (3) The amounts above represent the net impact of the cumulative errors in accounting for certain of the Company's investments in tax credit entities on the calculation of earnings per share for the three and nine month periods ended September 30, 2015. Principles of Consolidation The accompanying consolidated financial statements include the accounts of the Company and First NBC Bank, and First NBC Bank’s wholly owned subsidiaries, which include First NBC Community Development, LLC (FNBC CDC) and First NBC Community Development Fund, LLC (FNBC CDE) (collectively referred to as the Bank), and any variable interest entities (VIE) of which the Company is the primary beneficiary. Substantially all of the VIEs for which the Company is the primary beneficiary relate to tax credit investments. FNBC CDC is a Community Development Corporation formed to construct, purchase, and renovate affordable residential real estate properties in the New Orleans area. FNBC CDE is a Community Development Entity (CDE) formed to apply for and receive allocations of Federal New Markets Tax Credits (NMTC). Investments in Tax Credit Entities As part of its Community Reinvestment Act responsibilities and due to their favorable economics, the Company invests in tax credit-motivated projects. These projects are directed at tax credits issued under Low-Income Housing, Federal Historic Rehabilitation, and Federal New Markets Tax Credits. The Company generates its returns on tax credit motivated projects through the receipt of federal, and if applicable, state tax credits as well as equity returns. The federal tax credits are recorded as an offset to the income tax provision in the year that they are earned under federal income tax law – over 10 to 15 years, beginning in the year in which rental activity commences for Low-Income Housing credits, in the year of the issuance of the certificate of occupancy and the property being placed into service for Federal Historic Rehabilitation credits, and over 7 years for Federal NMTC upon the investment of funds into the CDE. These credits, if not used in the tax return for the year of origination, can be carried forward for 20 years. The state credits are recorded in income when earned usually when the project is placed in service and sold to investors after the tax credits have been transferred from the project to the Company. The Company invests in Low-Income Housing credits, which the Company invests in a tax credit entity, usually a limited liability company, which owns the real estate. The Company receives a 99.99% nonvoting interest in the entity that must be retained during the compliance period for the credits ( 15 years). Control of the tax credit entity rests in the .01% interest general partner, who has the power and authority to make decisions that impact economic performance of the project and is required to oversee and manage the project. The Company accounts for its investment in Low-Income Housing credits utilizing the equity method of accounting and evaluates its investment at the end of each reporting period for impairment and any residual returns are expected to be minor. For Federal Historic Rehabilitation credits, the Company invests in a tax credit entity, usually a limited liability company, which owns the real estate. The Company receives a 99% interest that must be retained during the compliance period for the credits ( 5 years). In most cases, the Company’s interest in the entity is generally reduced from a 99% interest to a 5% to 25% interest at the end of the compliance period. Control of the tax credit entity rests in the 1% interest general partner, who has the power and authority to make decisions that impact economic performance of the project and is required to oversee and manage the project. The Company accounts for its investment in Federal Historic Rehabilitation credits utilizing the equity method of accounting and evaluates its investment at the end of each reporting period for impairment. For Federal NMTC, a different structure is required by federal tax law. In order to distribute Federal NMTC, the federal government allocates such credits to CDEs. The Company invests in both CDEs formed by unaffiliated parties and in CDEs formed by the Company. Projects must be commercial or real estate operations and are qualified by their location in low- income areas or by their employment of, or service to, low-income citizens. A CDE, in most cases, creates a special-purpose subsidiary for each project through which the credits are allocated and through which the proceeds from the tax credit investor and a leverage lender, if applicable, flow through to the project, which in turn generate the credit. The credits are calculated at 39% of the total CDE allocation to the project at the rate of 5% for the first three years and 6% for the next four years. Federal tax law requires special terms benefiting the qualified project, which can include below-market interest rates. The Company evaluates its investment for impairment under the equity method of accounting at the end of each reporting period at the time the tax credits are earned on the project over the seven -year compliance period and any residual returns are expected to be minor. When the Company also has a loan to the project, it is reported as a loan in the consolidated balance sheet, as the Company has credit exposure to the project and the loan is repaid at the end of the compliance period (in general, the debt has no principal payments during the compliance period but the Company may require the project to fund a sinking fund over the compliance period to achieve the same risk reduction effect as if principal is being amortized). When the Company is the tax credit investor in a CDE formed by an unaffiliated party, it has no control of the applicable CDE or the CDE’s special-purpose subsidiary. When a project is funded through FNBC CDE, the Company consolidates its CDE and the specifically formed special-purpose entities since it maintains control over these entities. As part of the activities of FNBC CDE, the Company makes investments in the CDE for purposes of providing equity to the projects sponsored by the FNBC CDE. When a project is funded through FNBC CDE, the CDE will receive a CDE fee at the time of the project's closing of approximately 4% and an annual fee of 0.5% of the qualified equity investment in the project. The annual fee is received until the end of the Federal NMTC compliance period. The CDE fee earned is recorded in the consolidated statement of income as a component of noninterest income. The Company will pay a fee to the CDE when the project is funded through a CDE other than FNBC CDE at the time of a project's closing for the allocation of the credits. The fee is recorded as a component of noninterest expense in the Company's consolidated statement of income over the Federal NMTC compliance period. The Company has the risk of credit recapture if the project fails during the compliance period for Low-Income Housing and Federal Historic Rehabilitation transactions. For Federal NMTC transactions, the risk of credit recapture exists if investment requirements are not maintained during the compliance period. Such events, although rare, are accounted for when they occur and no such events have occurred to date. The Company has the ability to invest in Louisiana State Historic Rehabilitation tax credits due to its limited partner interest in several tax-advantaged limited partnerships whose purpose is to invest in approved Federal Historic Rehabilitation tax credit projects. The Company holds these equity investments until the State Historic Rehabilitation tax credits are sold to a third party and the Company evaluates its investment for impairment at the end of each reporting period. Impairment, if any, is recorded in its consolidated statement of income as a component of noninterest expense. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are susceptible to a significant change in the near term are the allowance for loan losses, income tax provision, fair value adjustments, impairment on tax credit investments and share-based compensation. Concentration of Credit Risk The Company’s loan portfolio consists of the various types of loans described in Note 5. Real estate or other assets secure most loans. The majority of these loans have been made to individuals and businesses in the Company’s market area of southeastern Louisiana, southern Mississippi, and the Florida panhandle, which are dependent on the area economy for their livelihoods and servicing of their loan obligations. The Company does not have any significant concentrations with respect to any one industry or customer. The Company maintains deposits in other financial institutions that may, from time to time, exceed the federally insured deposit limits. Reclassifications Certain reclassifications have been made to prior period balances to conform to the current period presentation. Recent Accounting Pronouncements ASU No. 2014-09 In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 205): An Amendment of the FASB Accounting Standards Codification , which clarifies the principles for recognizing revenue from contracts with customers. The new accounting guidance, which does not apply to financial instruments, is effective on a retrospective basis for annual reporting periods beginning after December 15, 2017, with early adoption permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2014-12 In June 2014, the FASB issued ASU No. 2014-12 Compensation-Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could be Achieved after the Requisite Service Period, which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is intended to resolve the diverse accounting treatments of these types of awards in practice and is effective for annual and interim periods beginning after December 15, 2015. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2014-13 In August 2014, the FASB issued ASU No. 2014-13, Consolidation (Topic 810): Measuring the Financial Assets and Financial Liabilities of a Consolidated Collateralized Financing Entity , which will allow an alternative fair value measurement approach for consolidated collateralized financing entities (CFEs) to eliminate a practice issue that results in measuring the fair value of a CFE’s financial assets at a different amount from the fair value of its financial liabilities even when the financial liabilities have recourse to only the financial assets. The approach would permit the parent company of a consolidated CFE to measure the CFE’s financial assets and financial liabilities based on the more observable of the fair value of the financial assets and the fair value of the financial liabilities. The new accounting guidance is for the annual period ending after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted as of the beginning of an annual period. The Company does not expect the new guidance to have a material impact on the Company’s financial condition or results of operations. ASU No. 2014-15 In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern , which will require management to assess an entity’s ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards in connection with preparing financial statements for each annual and interim reporting period. The new accounting guidance is for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-02 In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which eliminates the deferral of FAS 167 and makes changes to both the variable interest model and the voting model. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-03 In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs , which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-05 In April 2015, the FASB issued ASU No. 2015-05, Intangibles-Goodwill and Other Internal-Use Software (Subtopic 350-40) Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement , which provides guidance to clarify a customer’s accounting for fees paid in a cloud computing arrangement. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-15 In August 2015, the FASB issued ASU No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements: Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting , which amends ASC 835-30. ASU 2015-03, issued in April 2015, requires entities to present debt issuance costs related to a recognized debt liability as a direct deduction from the carrying amount of that debt liability. The guidance in ASU 2015-03 does not address presentation or subsequent measurement of debt issuance costs related to line-of-credit arrangements. Given the absence of authoritative guidance within ASU 2015-03 for debt issuance costs related to line-of-credit arrangements, ASU 2015-15 states the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing that deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. This update became effective upon announcement on June 18, 2015. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-16 In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments , which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined as if the accounting had been completed at the acquisition date. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter. The amendments in this update should be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update with early application permitted for financial statements that have not been issued. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Acquisitions	Acquisitions On January 16, 2015, the Company acquired certain assets and assumed certain liabilities from the Federal Deposit Insurance Corporation ("FDIC"), as receiver for First National Bank of Crestview, a full-service commercial bank headquartered in Crestview, Florida, which was closed and placed into receivership. Under the terms of the agreement, the Company agreed to assume all of the deposit liabilities, and acquire approximately $62.3 million of assets, of the failed bank. The acquired assets included the failed bank's performing loans, substantially all of its investment securities portfolio, and its three banking facilities, with the FDIC retaining the remaining assets. The transaction did not include a loss-share agreement with the FDIC. The Company received an initial settlement amount from the FDIC of $10.1 million . The acquisition was accounted for under the purchase method of accounting in accordance with ASC Topic 805. Both the purchased assets and liabilities were recorded at the acquisition date preliminary fair values. Identifiable intangible assets, including core deposit intangible assets were recorded at preliminary fair value. The net cash received in the acquisition was included in the investing activities on the Company's consolidated statement of cash flows. In accordance with ASC Topic 805, estimated fair values are subject to change up to one year after the acquisition date. This allows for adjustments to the initial purchase entries if additional information relative to closing date fair values becomes available. Material adjustments to acquisition date estimated fair values would be recorded in the period in which the acquisition occurred, and as a result, previously reported results are subject to change. Information regarding the amounts recorded in the acquisition may be adjusted as the Company refines its estimates of the fair value of loans acquired, core deposit intangible asset, and the deferred tax assets or liabilities created from the acquisition. Determining the fair value of assets and liabilities, particularly illiquid assets and liabilities, is a complicated process involving significant judgment regarding estimates and assumptions used to calculate estimated fair value. Fair value adjustments based on updated estimates could materially affect the goodwill, if any, recorded on the acquisition. The Company may incur losses on the acquired loans that are materially different from losses the Company originally projected. The acquired assets and liabilities, as well as the adjustments to record the assets and liabilities at their estimated fair values, are presented in the following table: (In thousands) As Acquired Preliminary Fair Value Adjustments As recorded by First NBC Bank Assets Cash and due from banks $ 1,511 $ — $ 1,511 Short-term investments 19,971 — 19,971 Investment securities-available for sale 9,559 — 9,559 Loans 27,647 (1,203 ) (1) 26,444 Bank premises 3,120 — 3,120 Core deposit intangible — 188 (2) 188 Other assets 455 — 455 Total Assets $ 62,263 $ (1,015 ) $ 61,248 Liabilities Deposits: Non-interest bearing $ 22,680 $ — $ 22,680 Interest bearing 49,584 16 (3) 49,600 Total deposits 72,264 16 72,280 Other liabilities 34 — 34 Total Liabilities $ 72,298 $ 16 $ 72,314 (1) The amount represents the adjustment of the book value of First National Bank of Crestview's loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio. (2) The amount represents the estimated fair value of the core deposit intangible asset created in the acquisition. (3) The adjustment is necessary because the weighted average interest rate of First National Bank of Crestview's deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 49 months .

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table sets forth the computation of basic net income per common share and diluted net income per common share: For the Three Months Ended For the Nine Months Ended (In thousands, except per share data) 2015 2014 2015 2014 Basic: Income available to common shareholders $ 18,106 $ 13,989 $ 50,874 $ 38,837 Weighted-average common shares outstanding 18,630 18,556 18,737 18,530 Basic earnings per share $ 0.97 $ 0.75 $ 2.72 $ 2.10 Diluted: Income available to common shareholders $ 18,106 $ 13,989 $ 50,874 $ 38,837 Weighted-average common shares outstanding 18,630 18,556 18,737 18,530 Effect of dilutive securities: Stock options outstanding 420 381 407 382 Restricted shares outstanding 6 — 3 — Warrants 115 117 119 118 Weighted-average common shares outstanding – assuming dilution 19,171 19,054 19,266 19,030 Diluted earnings per share $ 0.94 $ 0.73 $ 2.64 $ 2.04

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities The amortized cost and market values of investment securities, with gross unrealized gains and losses, as of September 30, 2015 and December 31, 2014 , were as follows (in thousands): September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Less Than One Year Greater Than One Year Available for sale: U.S. government agency securities $ 154,786 $ 943 $ (267 ) $ (810 ) $ 154,652 U.S. Treasury securities 13,016 — — (130 ) 12,886 Municipal securities 12,130 163 — (74 ) 12,219 Mortgage-backed securities 54,863 568 (429 ) (5 ) 54,997 Corporate bonds 8,144 — (155 ) — 7,989 Other equity securities 22 — — — 22 Other debt securities 30,946 — (9 ) — 30,937 $ 273,907 $ 1,674 $ (860 ) $ (1,019 ) $ 273,702 Held to maturity: Municipal securities $ 38,989 $ 1,997 $ — $ (9 ) $ 40,977 Mortgage-backed securities 44,330 583 (1,130 ) (159 ) 43,624 $ 83,319 $ 2,580 $ (1,130 ) $ (168 ) $ 84,601 December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Less Than One Year Greater Than One Year Available for sale: U.S. government agency securities $ 161,461 $ 891 $ — $ (4,825 ) $ 157,527 U.S. Treasury securities 13,019 — — (409 ) 12,610 Municipal securities 12,175 107 (36 ) — 12,246 Mortgage-backed securities 57,025 635 (137 ) (436 ) 57,087 Corporate bonds 8,263 — — (86 ) 8,177 $ 251,943 $ 1,633 $ (173 ) $ (5,756 ) $ 247,647 Held to maturity: Municipal securities $ 41,255 $ 2,182 $ (62 ) $ — $ 43,375 Mortgage-backed securities 47,821 1,098 (208 ) (1,130 ) 47,581 $ 89,076 $ 3,280 $ (270 ) $ (1,130 ) $ 90,956 During 2013, the Company transferred securities with a fair value of $95.4 million from available for sale to held to maturity. Management determined it had both the positive intent and ability to hold these securities until maturity. The reclassified securities consisted of municipal and mortgage-backed securities and were transferred due to movements in interest rates. The securities were reclassified at fair value at the time of transfer and represented a non-cash transaction. Accumulated other comprehensive income (loss) included pre-tax unrealized losses of $5.9 million on these securities at the date of transfer. As of September 30, 2015 , $4.7 million of pre-tax unrealized losses on these securities were included in accumulated other comprehensive income. These unrealized losses and offsetting other comprehensive income components are being amortized into net interest income over the remaining life of the related securities as a yield adjustment, resulting in no impact on future net income. As of September 30, 2015 and December 31, 2014 , the Company had 50 and 38 securities, respectively, that were in a loss position. The unrealized losses for each of the 50 securities relate to market interest rate changes. The Company has considered the current market for the securities in a loss position, as well as the severity and duration of the impairments, and expects that the value will recover. As of September 30, 2015 , management does not intend to sell these investment securities until the fair value exceeds amortized cost and it is more likely than not the Company will not be required to sell debt securities before the anticipated recovery of the amortized cost basis of the security; thus, the impairment is determined not to be other-than-temporary. The amortized cost and estimated market values by contractual maturity of investment securities as of September 30, 2015 and December 31, 2014 are shown in the following table (in thousands). Mortgage-backed securities have been allocated based on expected maturities. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2015 December 31, 2014 Weighted Average Yield Amortized Cost Estimated Market Value Weighted Average Yield Amortized Cost Estimated Market Value Available for sale: Due in one year or less 1.34 % $ 48,124 $ 48,300 1.78 % $ 571 $ 573 Due after one year through five years 2.19 67,484 68,208 2.64 51,037 51,916 Due after five years through ten years 2.00 135,643 135,130 2.02 176,631 172,012 Due after ten years 3.25 22,656 22,064 3.34 23,704 23,146 Total securities 2.01 % $ 273,907 $ 273,702 2.27 % $ 251,943 $ 247,647 Held to maturity: Due in one year or less 10.63 % $ 4,469 $ 4,405 3.88 % $ 2,045 $ 2,003 Due after one year through five years 3.98 37,307 38,289 4.16 20,921 21,875 Due after five years through ten years 3.81 24,037 24,670 3.39 32,618 33,898 Due after ten years 3.31 17,506 17,237 3.30 33,492 33,180 Total securities 4.14 % $ 83,319 $ 84,601 3.55 % $ 89,076 $ 90,956 Securities with estimated market values of $277.9 million and $279.1 million at September 30, 2015 and December 31, 2014 , respectively, were pledged to secure public deposits, securities sold under agreements to repurchase, and long-term borrowings. There were no proceeds from the sales of securities for the nine months ended September 30, 2015 . For the nine months ended September 30, 2014, proceeds from the sales of securities were $44.5 million . Gross gains of $0.8 million and gross losses of $0.7 million were realized for the nine months ended September 30, 2014.

Loans

Loans	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Loans	Loans Major classifications of loans at September 30, 2015 and December 31, 2014 were as follows (in thousands): September 30, 2015 December 31, 2014 Commercial real estate loans: Construction $ 451,713 $ 316,492 Mortgage(1) 1,301,897 1,252,225 1,753,610 1,568,717 Consumer real estate loans: Construction 8,676 10,393 Mortgage 153,520 131,031 162,196 141,424 Commercial and industrial loans 1,133,114 1,016,414 Loans to individuals, excluding real estate 20,681 18,316 Nonaccrual loans 35,653 21,228 Other loans 13,600 8,165 3,118,854 2,774,264 Less allowance for loan losses (53,076 ) (42,336 ) Loans, net $ 3,065,778 $ 2,731,928 (1) Included in commercial real estate loans, mortgage, are owner-occupied real estate loans of $421.2 million at September 30, 2015 and $419.3 million at December 31, 2014 . A summary of changes in the allowance for loan losses during the three and nine months ended September 30, 2015 and September 30, 2014 is as follows (in thousands): For the Three Months Ended September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Balance, beginning of period $ 50,351 $ 37,403 $ 42,336 $ 32,143 Provision charged to operations 3,000 3,000 11,600 9,000 Charge-offs (287 ) (137 ) (1,192 ) (906 ) Recoveries 12 34 332 63 Balance, end of period $ 53,076 $ 40,300 $ 53,076 $ 40,300 The allowance for loan losses and recorded investment in loans, including loans acquired with deteriorated credit quality, as of the dates indicated are as follows (in thousands): September 30, 2015 Construction Commercial Real Estate Consumer Real Estate Commercial and Industrial Consumer Total Allowance for loan losses: Balance, beginning of period $ 4,030 $ 14,965 $ 3,316 $ 19,814 $ 211 $ 42,336 Charge-offs (12 ) (783 ) (55 ) (289 ) (53 ) (1,192 ) Recoveries — 246 4 67 15 332 Provision 2,298 2,996 462 5,844 — 11,600 Balance, end of period $ 6,316 $ 17,424 $ 3,727 $ 25,436 $ 173 $ 53,076 Ending balances: Individually evaluated for impairment $ 6 $ 4,024 $ 324 $ 9,070 $ — $ 13,424 Collectively evaluated for impairment $ 6,310 $ 13,400 $ 3,403 $ 16,366 $ 173 $ 39,652 Loans receivable: Ending balance-total $ 461,459 $ 1,313,173 $ 156,498 $ 1,166,889 $ 20,835 $ 3,118,854 Ending balances: Individually evaluated for impairment $ 754 $ 13,053 $ 3,058 $ 20,210 $ 71 $ 37,146 Collectively evaluated for impairment $ 460,705 $ 1,300,120 $ 153,440 $ 1,146,679 $ 20,764 $ 3,081,708 September 30, 2014 Construction Commercial Real Estate Consumer Real Estate Commercial and Industrial Consumer Total Allowance for loan losses: Balance, beginning of period $ 2,790 $ 13,780 $ 2,656 $ 12,677 $ 240 $ 32,143 Charge-offs (18 ) (441 ) (47 ) (304 ) (96 ) (906 ) Recoveries — 1 — 46 16 63 Provision 1,325 2,228 347 5,011 89 9,000 Balance, end of period $ 4,097 $ 15,568 $ 2,956 $ 17,430 $ 249 $ 40,300 Ending balances: Individually evaluated for impairment $ — $ 1,471 $ 938 $ 2,180 $ 1 $ 4,590 Collectively evaluated for impairment $ 4,097 $ 14,097 $ 2,018 $ 15,250 $ 248 $ 35,710 Loans receivable: Ending balance-total $ 318,145 $ 1,219,682 $ 131,027 $ 1,008,174 $ 21,591 $ 2,698,619 Ending balances: Individually evaluated for impairment $ 927 $ 13,942 $ 2,066 $ 5,636 $ 3 $ 22,574 Collectively evaluated for impairment $ 317,218 $ 1,205,740 $ 128,961 $ 1,002,538 $ 21,588 $ 2,676,045 Credit quality indicators on the Company’s loan portfolio, including loans acquired with deteriorated credit quality, as of the dates indicated were as follows (in thousands): September 30, 2015 Pass and Pass/Watch Special Mention Substandard Doubtful Total Construction $ 446,121 $ — $ 15,338 $ — $ 461,459 Commercial real estate 1,258,670 12,334 42,169 — 1,313,173 Consumer real estate 150,261 56 6,181 — 156,498 Commercial and industrial 1,050,880 6,995 94,014 15,000 1,166,889 Consumer 20,630 4 201 — 20,835 Total loans $ 2,926,562 $ 19,389 $ 157,903 $ 15,000 $ 3,118,854 December 31, 2014 Pass and Pass/Watch Special Mention Substandard Doubtful Total Construction $ 313,987 $ 2 $ 13,688 $ — $ 327,677 Commercial real estate 1,215,673 1,613 47,085 — 1,264,371 Consumer real estate 128,507 60 4,383 — 132,950 Commercial and industrial 1,005,829 — 24,800 — 1,030,629 Consumer 18,247 7 383 — 18,637 Total loans $ 2,682,243 $ 1,682 $ 90,339 $ — $ 2,774,264 The table above as of September 30, 2015 included $3.2 million of substandard loans which are loans acquired with deteriorated credit quality. As of December 31, 2014 , included in the above table were $5.4 million of substandard loans and $1.6 million of special mention loans all of which are loans acquired with deteriorated credit quality. Included in the table above as of September 30, 2015 was $15.0 million in commercial loans classified as doubtful which were evaluated for a specific allowance and determined that no allowance was necessary as of September 30, 2015 . The above classifications follow regulatory guidelines and can generally be described as follows: • Pass and pass/watch loans are of satisfactory quality. • Special mention loans have an existing weakness that could cause future impairment, including the deterioration of financial ratios, past due status, questionable management capabilities, and possible reduction in the collateral values. • Substandard loans have an existing specific and well-defined weakness that may include poor liquidity and deterioration of financial ratios. The loan may be past due and related deposit accounts experiencing overdrafts. Immediate corrective action is necessary. • Doubtful loans have specific weaknesses that are severe enough to make collection or liquidation in full improbable. An aged analysis of past due loans, including loans acquired with deteriorated credit quality, as of the dates indicated is as follows (in thousands): September 30, 2015 Greater Than 30 and Fewer Than 90 Days Past Due 90 Days and Greater Past Due Total Past Due Current Loans Total Loans Real estate loans: Construction $ 13 $ 1,069 $ 1,082 $ 460,377 $ 461,459 Commercial real estate 898 9,986 10,884 1,302,289 1,313,173 Consumer real estate 1,228 1,712 2,940 153,558 156,498 Total real estate loans 2,139 12,767 14,906 1,916,224 1,931,130 Other loans: Commercial and industrial 67 5,172 5,239 1,161,650 1,166,889 Consumer 283 182 465 20,370 20,835 Total other loans 350 5,354 5,704 1,182,020 1,187,724 Total loans $ 2,489 $ 18,121 $ 20,610 $ 3,098,244 $ 3,118,854 December 31, 2014 Greater Than 30 and Fewer Than 90 Days Past Due 90 Days and Greater Past Due Total Past Due Current Loans Total Loans Real estate loans: Construction $ 97 $ 750 $ 847 $ 326,830 $ 327,677 Commercial real estate 2,497 9,545 12,042 1,252,329 1,264,371 Consumer real estate 1,623 1,255 2,878 130,072 132,950 Total real estate loans 4,217 11,550 15,767 1,709,231 1,724,998 Other loans: Commercial and industrial 159 4,426 4,585 1,026,044 1,030,629 Consumer 564 322 886 17,751 18,637 Total other loans 723 4,748 5,471 1,043,795 1,049,266 Total loans $ 4,940 $ 16,298 $ 21,238 $ 2,753,026 $ 2,774,264 The following is a summary of information pertaining to impaired loans excluding loans acquired with deteriorated credit quality, as of the periods indicated (in thousands): September 30, 2015 Recorded Investment Contractual Balance Related Allowance With no related allowance recorded: Construction $ 711 $ 711 $ — Commercial real estate 1,948 2,168 — Consumer real estate 2,324 2,402 — Commercial and industrial 332 336 — Consumer 71 72 — Total $ 5,386 $ 5,689 $ — With an allowance recorded: Construction $ 43 $ 48 $ 6 Commercial real estate 11,105 11,336 4,024 Consumer real estate 734 746 324 Commercial and industrial 19,878 20,186 9,070 Consumer — — — Total $ 31,760 $ 32,316 $ 13,424 Total impaired loans: Construction $ 754 $ 759 $ 6 Commercial real estate 13,053 13,504 4,024 Consumer real estate 3,058 3,148 324 Commercial and industrial 20,210 20,522 9,070 Consumer 71 72 — Total $ 37,146 $ 38,005 $ 13,424 December 31, 2014 Recorded Investment Contractual Balance Related Allowance With no related allowance recorded: Construction $ 927 $ 927 $ — Commercial real estate 7,175 7,453 — Consumer real estate 2,085 2,097 — Commercial and industrial 436 498 — Consumer 256 256 — Total $ 10,879 $ 11,231 $ — With an allowance recorded: Construction $ — $ — $ — Commercial real estate 5,955 6,235 3,138 Consumer real estate — — — Commercial and industrial 14,721 14,774 5,889 Consumer 3 3 1 Total $ 20,679 $ 21,012 $ 9,028 Total impaired loans: Construction $ 927 $ 927 $ — Commercial real estate 13,130 13,688 3,138 Consumer real estate 2,085 2,097 — Commercial and industrial 15,157 15,272 5,889 Consumer 259 259 1 Total $ 31,558 $ 32,243 $ 9,028 For the Three Months Ended September 30, 2015 September 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction $ 783 $ — $ 488 $ 9 Commercial real estate 1,915 — 6,891 7 Consumer real estate 2,467 8 1,672 1 Commercial and industrial 336 1 642 — Consumer 71 1 — — Total $ 5,572 $ 10 $ 9,693 $ 17 With an allowance recorded: Construction $ 43 $ — $ 156 $ — Commercial real estate 11,272 — 6,142 3 Consumer real estate 662 6 677 3 Commercial and industrial 18,635 346 4,335 4 Consumer — — 3 — Total $ 30,612 $ 352 $ 11,313 $ 10 Total impaired loans: Construction $ 826 $ — $ 644 $ 9 Commercial real estate 13,187 — 13,033 10 Consumer real estate 3,129 14 2,349 4 Commercial and industrial 18,971 347 4,977 4 Consumer 71 1 3 — Total $ 36,184 $ 362 $ 21,006 $ 27 For the Nine Months Ended September 30, 2015 September 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction $ 819 $ 18 $ 464 $ 37 Commercial real estate 4,562 14 6,164 123 Consumer real estate 2,205 11 1,668 1 Commercial and industrial 384 1 800 16 Consumer 164 1 — — Total $ 8,134 $ 45 $ 9,096 $ 177 With an allowance recorded: Construction $ 22 $ — $ 155 $ 1 Commercial real estate 8,527 60 5,713 6 Consumer real estate 370 6 861 13 Commercial and industrial 17,300 350 4,021 4 Consumer 2 — 2 — Total $ 26,221 $ 416 $ 10,752 $ 24 Total impaired loans: Construction $ 841 $ 18 $ 619 $ 38 Commercial real estate 13,089 74 11,877 129 Consumer real estate 2,575 17 2,529 14 Commercial and industrial 17,684 351 4,821 20 Consumer 166 1 2 — Total $ 34,355 $ 461 $ 19,848 $ 201 Also presented in the above table is the average recorded investment of the impaired loans and the related amount of interest recognized during the time within the period that the impaired loans were impaired. When the ultimate collectability of the total principal of an impaired loan is in doubt and the loan is on nonaccrual status, all payments are applied to principal under the cost recovery method. When the ultimate collectability of the total principal of an impaired loan is not in doubt and the loan is in nonaccrual status, contractual interest is credited to interest income when received under the cash basis method. In the table above, all interest recognized represents cash collected. The average balances are calculated based on the month-end balances of the financing receivables of the period reported. As of September 30, 2015 and December 31, 2014 , there were $37 thousand and $28 thousand , respectively, in cash secured tuition loans that were past due 90 days or more still accruing interest. The following is a summary of information pertaining to nonaccrual loans as of the periods indicated (in thousands): September 30, 2015 December 31, 2014 Nonaccrual loans: Construction $ 1,070 $ 792 Commercial real estate 11,276 12,146 Consumer real estate 2,978 1,919 Commercial and industrial 20,175 6,051 Consumer 154 320 Total $ 35,653 $ 21,228 As of September 30, 2015 and December 31, 2014 , the average recorded investment in nonaccrual loans was $26.7 million and $19.6 million , respectively. The amount of interest income that would have been recognized on nonaccrual loans based on contractual terms was $1.1 million and $1.0 million at September 30, 2015 and December 31, 2014 , respectively. As of September 30, 2015 , the Company was not committed to lend additional funds to any customer whose loan was classified as impaired. ASC 310-30 Loans During 2011, the Company acquired certain loans from the Federal Deposit Insurance Corporation, as receiver for Central Progressive Bank, that are subject to ASC 310-30. ASC 310-30 provides recognition, measurement, and disclosure requirements for acquired loans that have evidence of deterioration of credit quality since origination for which it is probable, at acquisition, that the Company will be unable to collect all contractual amounts owed. The Company’s allowance for loan losses for all acquired loans subject to ASC 310-30 would reflect only those losses incurred after acquisition. There were no loans acquired from the Federal Deposit Insurance Corporation, as receiver for First National Bank of Crestview, that were subject to ASC 310-30. The following is a summary of changes in the accretable yields of acquired loans as of the periods indicated (in thousands): September 30, 2015 September 30, 2014 Balance, beginning of period $ 115 $ 170 Acquisition — — Net transfers from nonaccretable difference to accretable yield — 816 Accretion (86 ) (832 ) Balance, end of period $ 29 $ 154 Information about the Company’s troubled debt restructurings (TDRs) at September 30, 2015 and September 30, 2014 is presented in the following tables (in thousands): Current Greater Than 30 Days Past Due Nonaccrual TDRs Total TDRs As of September 30, 2015 Real estate loans: Construction $ 2 $ — $ 43 $ 45 Commercial real estate 2,227 — — 2,227 Consumer real estate 587 — 131 718 Total real estate loans 2,816 — 174 2,990 Other loans: Commercial and industrial 477 — 12,058 12,535 Total loans $ 3,293 $ — $ 12,232 $ 15,525 Current Greater Than 30 Days Past Due Nonaccrual TDRs Total TDRs As of September 30, 2014 Real estate loans: Construction $ 237 $ — $ — $ 237 Commercial real estate 349 — 103 452 Consumer real estate 610 — 139 749 Total real estate loans 1,196 — 242 1,438 Other loans: Commercial and industrial 291 — — 291 Total loans $ 1,487 $ — $ 242 $ 1,729 There were TDRs of $12.1 million modified and moved to interest-only payments during the nine months ended September 30, 2015 . There were no new TDRs which were modified during the nine months ended September 30, 2014 . A summary of information pertaining to modified terms of loans, as of the dates indicated, is as follows: As of September 30, 2015 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Troubled debt restructuring: Construction 2 $ 45 $ 45 Commercial real estate 2 2,227 2,227 Consumer real estate 3 718 718 Commercial and industrial 3 12,535 12,535 10 $ 15,525 $ 15,525 As of September 30, 2014 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Troubled debt restructuring: Construction 4 $ 237 $ 237 Commercial real estate 1 452 452 Consumer real estate 2 749 749 Commercial and industrial 1 291 291 8 $ 1,729 $ 1,729 None of the performing TDRs defaulted subsequent to the restructuring through the date the financial statements were available to be issued. As of September 30, 2015 and December 31, 2014 , the Company was not committed to lend additional funds to any customer whose loan was classified as impaired or as a TDR.

Goodwill and Other Acquired Int

Goodwill and Other Acquired Intangible Assets	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Acquired Intangible Assets	Goodwill and Other Acquired Intangible Assets Changes to the carrying amount of goodwill for the nine months ended September 30, 2015 and the year ended December 31, 2014 are provided in the following table (in thousands): Balance at December 31, 2013 $ 4,808 Goodwill acquired during the year — Balance at December 31, 2014 4,808 Goodwill acquired during the year 1,192 Balance at September 30, 2015 $ 6,000 The goodwill acquired during the first nine months of 2015 is a result of the First National Bank of Crestview acquisition. See Note 2 for further information. Intangible assets subject to amortization Definite-lived intangible assets had the following carrying values as of the periods indicated (in thousands): September 30, 2015 December 31, 2014 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Core deposit intangibles $ 4,588 $ 1,772 $ 2,816 $ 4,400 $ 1,485 $ 2,915 Other intangible assets $ 133 $ 7 $ 126 $ 106 $ — $ 106 Total definite-lived intangible assets $ 4,721 $ 1,779 $ 2,942 $ 4,506 $ 1,485 $ 3,021 The Company’s core deposit intangibles are being amortized over the estimated useful life of 12 years. The Company’s amortization expense totaled $0.1 million and $0.2 million for the three months ended September 30, 2015 and 2014, respectively, and $0.3 million and $0.5 million for the nine months ended September 30, 2015 and 2014, respectively.

Investments in Tax Credit Entit

Investments in Tax Credit Entities	9 Months Ended
	Sep. 30, 2015
Investments, All Other Investments [Abstract]
Investments in Tax Credit Entities	Investments in Tax Credit Entities Federal NMTC Investment in Bank Owned CDE The Federal NMTC program is administered by the Community Development Financial Institutions Fund of the U.S. Treasury and is aimed at stimulating economic and community development and job creation in low-income communities. The program provides federal tax credits to investors who make qualified equity investments (QEIs) in a Community Development Entity(CDE). The CDE is required to invest the proceeds of each QEI in projects located in or benefiting low-income communities, which are generally defined as those census tracts with poverty rates greater than 20% and/or median family incomes that are less than or equal to 80% of the area median family income. FNBC CDE has received allocations of Federal NMTC, totaling $118.0 million since 2011. These allocations generated $46.0 million in tax credits. The credit provided to the investor totals 39% of each QEI in a CDE and is claimed over a seven -year credit allowance period. In each of the first three years, the investor receives a credit equal to 5% of the total QEI allocated to each project. For each of the remaining four years, the investor receives a credit equal to 6% of the total QEI allocated to each project. The Company is eligible to receive up to $46.0 million in tax credits over the seven -year credit allowance period, beginning with the period in which the QEI was made, for its total QEI of $118.0 million . Through September 30, 2015 , FNBC CDE had invested in allocations of $118.0 million , of which $40.0 million was invested by the Company and $78.0 million was invested by leverage lenders, which include the Company. Of the $78.0 million invested by leverage lenders, $17.5 million was invested by the Company as the leverage lender. The Company's investment in the Company's subsidiary CDE is eliminated upon consolidation. While the leverage lender's portion of the investment in the CDE is classified as a loan, the remaining investment in the CDE is an equity investment included in investment in tax credit entities in the accompanying consolidated balance sheets and evaluated at each reporting date for impairment. The impairment is evaluated based on the remaining tax credits available along with any applicable equity income or loss allocations. Impairment, if any, is recorded in the consolidated statement of income as a component of noninterest expense as well as any applicable equity income or loss allocations. The Federal NMTC claimed by the Company, with respect to each QEI, remain subject to recapture over each QEI’s credit allowance period upon the occurrence of any of the following: • CDE does not invest substantially all (defined as a minimum of 85% ) of the QEI proceeds in qualified low-income community investments; • CDE ceases to be a CDE; or • CDE redeems its QEI investment prior to the end of the current credit allowance period. At September 30, 2015 and December 31, 2014 , none of the above recapture events had occurred, nor, in the opinion of management, are such events anticipated to occur in the foreseeable future. As of September 30, 2015 , FNBC CDE had total assets of $130.9 million , consisting of cash of $6.0 million , loans of $112.3 million and other assets of $12.6 million , with liabilities of $0.4 million and capital of $130.5 million . Based on the structure of these transactions, the Company expects to recover its investment solely through use of the tax credits that were generated by the investments and any equity returns received through the limited partnership. Investments in Non-Bank Owned CDEs The Company is also a limited partner in several tax-advantaged limited partnerships and a shareholder in several C corporations whose purpose is to invest in approved Federal NMTC projects through CDEs that are not associated with FNBC CDE. During 2014 and 2013, several of these partnerships in which the Company was a limited partner converted to C corporations. The Company’s ownership in the CDEs did not change based on the conversion. These investments are accounted for using the equity method of accounting and are included in investment in tax credit entities in the accompanying consolidated balance sheets. The limited partnerships and C corporations are considered VIEs. The VIEs have not been consolidated because the Company is not considered the primary beneficiary. The Company's investment in Federal NMTC partnerships and C corporations, net of the loans to the investment fund, are evaluated for impairment at the end of each reporting period based on the remaining tax credits available along with any equity income or loss allocations. Impairment, if any, is recorded in the consolidated statement of income as a component of noninterest expense as well as any applicable equity income or loss allocations. All of the Company’s investments in Federal NMTC structures are privately held, and their market values are not readily determinable. Based on the structure of these transactions, the Company expects to recover its investment solely through use of the tax credits that were generated by the investments and any equity returns received through the limited partnership. Low-Income Housing Tax Credits The Company is a limited partner in several tax-advantaged limited partnerships whose purpose is to invest in approved Low-Income Housing tax credit projects. The tax credits associated with these investments are typically received over a 10 to 15 year period subject to recapture. These investments are accounted for using the equity method of accounting and are included in investments in tax credit entities in the accompanying consolidated balance sheets. The limited partnerships are considered to be VIEs and are evaluated for consolidation based on the Company's determination if it is the primary beneficiary. The Company has determined that it is not the primary beneficiary with respect to the limited partnerships. Thus, the VIEs have not been consolidated except for a single Low-Income Housing investment which was consolidated (See Note 8 for further details.) All of the Company’s investments in low-income housing partnerships are evaluated for impairment at the end of each reporting period. Impairment, if any, is recorded in the consolidated statement of income as a component of noninterest expense as well as any applicable equity income or loss allocations. Based on the structure of these transactions, the Company expects to recover its remaining investments at September 30, 2015 through the use of the tax credits that were generated by the investments and any equity returns received through the limited partnerships. Federal Historic Rehabilitation Tax Credits The Company is a limited partner in several tax-advantaged limited partnerships whose purpose is to invest in approved Federal Historic Rehabilitation tax credit projects. The tax credits received on these investments are received in the year that the project is placed in service and subject to recapture over a five year period. These investments are accounted for using the equity method of accounting and are included in investments in tax credit entities in the accompanying consolidated balance sheets. The limited partnerships are considered to be VIEs and are evaluated for consolidation based on the Company's determination if it is the primary beneficiary. The Company has determined that it is not the primary beneficiary with respect to any of the limited partnerships and, thus, the VIEs have not been consolidated. All of the Company’s investments in limited partnerships are evaluated for impairment at the end of each reporting period and the Company records impairment, if any, in its consolidated statement of income as a component of noninterest expense as well as any applicable equity income or loss allocations. Based on the structure of these transactions, the Company expects to recover its remaining investments in Federal Historic Rehabilitation tax credits at September 30, 2015 through the equity ownership in the underlying projects. State Historic Rehabilitation Tax Credits In connection with its limited partner interest in several tax-advantaged limited partnerships whose purpose is to invest in approved Federal Historic Rehabilitation tax credit projects, the Company can receive Louisiana State Historic Rehabilitation tax credits. These credits are certified by the State of Louisiana and are earned by the Company once the project is placed in service and then sold to investors after the State Historic Rehabilitation tax credits are certified by the State of Louisiana and transferred from the project to the Company. The credits are typically sold within 12 months of the project being placed in service. The Company evaluates its investment for impairment at the end of each reporting period. Impairment, if any, is recorded in its consolidated statement of income as a component of noninterest expense. State NMTC Investments in Non-Bank Owned CDEs The Company is a limited partner in several tax-advantaged limited partnerships that are CDEs, whose purpose is to invest in approved State NMTC projects that are not associated with FNBC CDE. Based on the structure of these transactions, the Company expects to recover its remaining investments in State NMTC at September 30, 2015 through the transfer of its ownership interest to third party investors. The Company evaluates its investment for impairment at the end of each reporting period. Impairment, if any, is recorded in its consolidated statement of income as a component of noninterest expense. The tables below set forth the Company's investment in Federal NMTC, State NMTC, Federal Low-Income Housing, Federal Historic Rehabilitation, and State Historic Rehabilitation tax credits, along with the credits expected to be generated through its participation in these programs as of September 30, 2015 and December 31, 2014 (in thousands). The amounts as of September 30, 2015 reflect the cumulative effect of the errors in the accounting for certain of its investments in tax credit entities and the net impact of the reversal of previously recorded amortization under the cost method and the net effect of the equity method and impairment charges. September 30, 2015 Investment Total Impairment(1) Loans to Investment Funds(2) Elimination(3) Net Investment Tax Benefits Recognized Through December 31, 2014 Tax Benefits Expected to be Recognized in 2015 Tax Benefits Expected to be Recognized in 2016, and Thereafter Total Tax Benefits Expected to be Recognized NMTC: Federal: Bank Owned CDEs $ 157,991 $ (6,779 ) $ — $ (118,000 ) $ 33,212 $ 16,490 $ 6,580 $ 22,949 $ 46,019 Non-Bank Owned CDEs 170,839 (21,544 ) (127,520 ) — 21,775 36,580 9,769 20,076 66,425 State 28,227 — — — 28,227 — — — — Total NMTC 357,057 (28,323 ) (127,520 ) (118,000 ) 83,214 53,070 16,349 43,025 112,444 Low-Income Housing 36,162 (7,631 ) — — 28,531 13,188 4,015 38,093 55,296 Historic Rehabilitation: Federal(4) 58,561 (5,805 ) — — 52,756 37,144 41,602 — 78,746 State 7,957 (199 ) — — 7,758 — — — — Total Historic Rehabilitation 66,518 (6,004 ) — — 60,514 37,144 41,602 — 78,746 Total $ 459,737 $ (41,958 ) $ (127,520 ) $ (118,000 ) $ 172,259 $ 103,402 $ 61,966 $ 81,118 $ 246,486 (1) Amount represents the net impact of the reversal of previously recorded amortization under the cost method, as described in Note 1 net of the effect of the application of the equity method and impairment charges. (2) Interest-only loans made to the investment fund during the compliance period for Federal NMTC. (3) Through September 30, 2015 , FNBC CDE received allocations of Federal NMTC from the CDFI Fund of the U.S. Treasury totaling $118.0 million over a three year period beginning in 2011. These investments are eliminated upon consolidation by the Company. (4) As of September 30, 2015 , the Company had $10.5 million invested in Federal Historic Rehabilitation tax credit projects which the Company expects to generate Federal Historic Rehabilitation tax credits in 2015 and 2016 when the projects are completed, receive the certificates of occupancy, and the property is placed into service. The amount of tax credits to be received will be determined when the costs are certified. December 31, 2014 Investment Total Impairment(1) Loans to Investment Funds(2) Elimination(3) Net Investment Tax Benefits Recognized Through December 31, 2013 Tax Benefits Recognized in 2014 Tax Benefits Expected to be Recognized in 2015, and Thereafter Total Tax Benefits Expected to be Recognized NMTC: Federal: Bank Owned CDEs $ 123,700 $ — $ — $ (118,000 ) $ 5,700 $ 10,375 $ 6,115 $ 29,530 $ 46,020 Non-Bank Owned CDEs 162,192 (15,852 ) (120,540 ) — 25,800 27,213 9,367 25,945 62,525 State 28,227 — — — 28,227 — — — — Total NMTC 314,119 (15,852 ) (120,540 ) (118,000 ) 59,727 37,588 15,482 55,475 108,545 Low-Income Housing 43,733 (7,264 ) — — 36,469 9,546 3,642 42,109 55,297 Historic Rehabilitation: Federal(4) 41,794 (3,412 ) — — 38,382 17,823 19,321 37,295 74,439 State 6,335 — — — 6,335 — — — — Total Historic Rehabilitation 48,129 (3,412 ) — — 44,717 17,823 19,321 37,295 74,439 Total $ 405,981 $ (26,528 ) $ (120,540 ) $ (118,000 ) $ 140,913 $ 64,957 $ 38,445 $ 134,879 $ 238,281 (1) Amount represents impairment recorded from the date of original investment through the current period, as evaluated by the Company at the end of each reporting period. (2) Interest-only loans made to the investment fund during the compliance period for Federal NMTC. (3) Through December 31, 2014 , FNBC CDE received allocations of Federal NMTC from the CDFI Fund of the U.S. Treasury totaling $118.0 million over a three year period beginning in 2011. These investments are eliminated upon consolidation by the Company. (4) As of December 31, 2014 , the Company had $12.6 million invested in Federal Historic Rehabilitation tax credit projects which the Company expects to generate Federal Historic Rehabilitation tax credits in 2015 and 2016 when the projects are completed, receive the certificate of occupancy, and the property is placed in service. The amount of tax credits to be received will be determined when the costs are certified. The impairment of tax credit investments for the three and nine month periods ended September 30, 2015 reflect the net impact of the cumulative errors in accounting for certain of its investments in tax credit entities and the net impact of the reversal of previously recorded amortization under the cost method and the net effect of the appropriate recording of the equity method and impairment charges were as follows (in thousands) : For the Three Months Ended September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Federal NMTC $ 1,114 $ 2,972 $ 7,793 $ 7,332 Low-Income Housing 606 541 367 1,624 Federal and State Historic Rehabilitation 1,533 461 2,592 1,222 Total impairment $ 3,253 $ 3,974 $ 10,752 $ 10,178 The amount of basis reduction recorded related to the Company's investment in tax credit entities for the three and nine month periods ended September 30, 2015 and September 30, 2014 were as follows (in thousands): For the Three Months Ended September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Federal NMTC $ 368 $ 350 $ 1,104 $ 1,051 Federal Historic Rehabilitation 138 984 415 1,693 Total basis reduction $ 506 $ 1,334 $ 1,519 $ 2,744 The Company also made loans and leverage loans in the normal course of business to the tax credit related projects. These loans are subject to the Company's underwriting criteria and all loans were performing according to their contractual terms at September 30, 2015 . These loans were classified in the Company's loan portfolio at September 30, 2015 and December 31, 2014 as follows (in thousands): September 30, 2015 December 31, 2014 Construction $ 45,353 $ 80,741 Commercial real estate 71,305 67,520 Commercial and industrial 137,555 117,191 Total loans $ 254,213 $ 265,452

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2015
Investments, All Other Investments [Abstract]
Variable Interest Entities	Variable Interest Entities A subsidiary of the Bank, FNBC CDC, is the managing member of a tax-advantaged limited partnership whose purpose is to invest in approved Low-Income Housing tax credit projects. This limited partnership is considered to be a VIE, whereby the Company is considered the primary beneficiary and must consolidate the VIE and, as such, no impairment charges have been recorded with respect to this investment. The initial recognition of this VIE relationship was accounted for using acquisition accounting. Under acquisition accounting, the assets and liabilities acquired are accounted for at market and intercompany balances are eliminated. As of September 30, 2015 , the Company included in its consolidated financial statements total assets of $40.4 million , consisting of real estate of $37.2 million and other assets of $3.2 million , with liabilities of $3.0 million and capital of $4.9 million .

Long-term Borrowings

Long-term Borrowings	9 Months Ended
	Sep. 30, 2015
Debt Disclosure [Abstract]
Long-term Borrowings	Long-term Borrowings Subordinated Notes Due 2025 In February 2015, the Company issued $60.0 million in aggregate principal amount of subordinated notes to certain qualified institutional investors. Unless earlier redeemed, the notes have a maturity date of February 18, 2025 and bear interest, payable semiannually in arrears on February 18 and August 18 of each year, commencing August 18, 2015 , at a fixed interest rate of 5.75% per year. The notes are not convertible into common stock or preferred stock of the Company and are not subject to redemption at the option of the holders. The notes may be redeemed by the Company, in whole or in part, on or after November 18, 2024 or, in whole but not in part, under certain limited circumstances set forth in the Indenture. Any redemption by the Company would be at a redemption price equal to 100% of the principal balance being redeemed, together with any accrued and unpaid interest to the date of redemption. Principal and interest on the notes are not subject to acceleration, except upon certain bankruptcy-related events. The notes are the unsecured, subordinated obligations of the Company and rank junior in right of payment to the Company’s current and future senior indebtedness and to the Company’s obligations to its general creditors. The Company plans to use the net proceeds from the sale of the subordinated notes for general corporate purposes, which may include supporting the continued growth of its business, acquisitions, and the redemption or repayment of other fixed obligations. Employee Stock Ownership Plan Loan In March 2015, the Company sponsored Employee Stock Ownership Trust entered into a loan from First National Bankers Bank (FNBB) in order to purchase 100,000 shares of Company stock for $3.3 million . This borrowing is required to be recorded on the Company’s balance sheet, with an offsetting entry to additional paid-in capital. The loan matures on December 5, 2024 , and bears interest at a floating rate equal to the Wall Street Journal Prime rate, which was 3.25% as of September 30, 2015 . The loan is subject to a pledge of 93,000 shares of the Company stock, owned by the Trust, as of September 30, 2015 . The $40.0 million borrowing included within long-term borrowings at September 30, 2015 and December 31, 2014 consists of a borrowing by the Company from Credit Suisse which is in the legal form of a long-term repurchase agreement. The borrowing matures on April 1, 2019, and bears interest at a floating rate equal to three-month USD LIBOR plus 1.35% , and was 1.63% at September 30, 2015 . The following table includes a summary of long-term borrowings as of September 30, 2015 and December 31, 2014 (in thousands): September 30, 2015 December 31, 2014 FNBB $ 3,392 $ — Credit Suisse Securities (USA) LLC 40,000 40,000 5.75% Subordinated Notes due 2025 60,000 — Total long-term borrowings $ 103,392 $ 40,000

Derivative - Interest Rate Swap

Derivative - Interest Rate Swap Agreements	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative - Interest Rate Swap Agreements	Derivative - Interest Rate Swap Agreements Interest Rate Swaps. During 2014, the Company entered into three delayed interest rate swaps with Counterparty C to manage exposure against the variability in the expected future cash flows attributed to changes in the benchmark interest rate on a portion of its variable-rate debt. The Company entered into these interest rate swap agreements to convert a portion of its forecasted variable-rate debt to a fixed rate, which is a cash flow hedge of a forecasted transaction. The total notional amount of the three derivative contracts is $165.0 million . During 2014, the Company terminated its cash flow hedge with Counterparty A, which the Company had entered into in 2012, as internal forecasts for future interest rates changed since this transaction was initiated. The total notional amount of the derivative contract was $115.0 million . The termination of the cash flow hedge resulted in a loss of $8.0 million which had been reflected in the Company’s operating cash flows and will be reclassified from accumulated other comprehensive income (loss) to net income as interest expense as it is amortized over a multi-year period consistent with the original maturity dates of the hedge which began in January 2015 and terminates in January 2022. The Company entered into a delayed interest rate swap with Counterparty B in 2013 to manage exposure against the variability in the expected future cash flows attributed to changes in the benchmark interest rate on a portion of its variable-rate debt. The Company entered into this interest rate swap agreement to convert a portion of its variable-rate debt to a fixed rate, which is a cash flow hedge of a forecasted transaction. The total notional amount of the derivative contract is $150.0 million . Interest Rate-Prime Swaps. In September 2015, the Company entered into two interest rate-prime swaps with Counterparty C to manage exposure against the variability in the expected future cash flows on the designated Prime and Prime plus 1% pools of its floating rate loan portfolio. The Company entered into these interest rate-prime swap agreements to hedge the cash flows from these pools of its floating rate loan portfolio, which is expected to offset the variability in the expected future cash flows attributable to the fluctuations in the daily weighted average Wall Street Journal Prime index, which is a cash flow hedge of a forecasted transaction. The notional amount of the contracts are a Prime tranche of $30.0 million and a Prime plus 1% tranche of $40.0 million for a total notional amount of $70.0 million . The Company will receive payments from the counterparty at a fixed rate of interest and pay the counterparty at the Prime rate associated with each tranche on its notional amount. The Prime tranche will receive payments at a fixed rate of 4.50% and pay the counterparty at Prime on the notional amount. The Prime plus 1% tranche will receive payments at a fixed rate of 5.49% and pay the counterparty at Prime plus 1% on the notional amount. The cash flow payments on the derivatives begin December 2015 and terminate September 2022. In September 2015, the Company terminated two of its interest rate swaps with Counterparty B, which the Company entered into in 2013, as internal forecasts for future interest rates changed since these transactions were initiated. The notional amounts of the derivative contracts were a Prime tranche of $30.0 million and a Prime plus 1% tranche of $40.0 million for a total notional amount of $70.0 million . The termination of the cash flow hedges resulted in a gain of $1.3 million which has been reflected in the Company's operating cash flows and included within accumulated other comprehensive income (loss), net of tax. This gain has not been included in net income as of September 30, 2015 as the Company entered into two new interest rate-prime swaps with substantially similar terms (see interest rate-prime swaps transaction with Counterparty C above) at the time of termination. The gain will be reclassified from accumulated other comprehensive income (loss) to net income as interest income as it is accreted over a multi-year period consistent with the original maturity dates of the hedges which began in September 2013 and terminate in September 2019. In March 2015, the Company entered into four interest rate swaps with Counterparty C to manage exposure against the variability in the expected future cash flows on the designated Prime plus 1% floored at 5% , Prime plus 2% , Prime plus 2% actual/ 365 , and Prime plus 2.25% pools of its floating rate loan portfolio. The Company entered into the interest rate-prime swap agreements to hedge the cash flows from these pools of its floating rate loan portfolio, which is expected to offset the variability in the expected future cash flows attributable to the fluctuations in the daily weighted average Wall Street Journal Prime index, which is a cash flow hedge of a forecasted transaction. The notional amount of the contracts are Prime plus 1% floored at 5% tranche of $40.0 million , Prime plus 2% tranche of $15.0 million , Prime plus 2% actual/365 tranche of $10.0 million , and Prime plus 2.25% tranche of $10.0 million for a total notional amount of $75.0 million . The Company will receive payments from the counterparty at a fixed rate of interest and pay the counterparty at the Prime rate associated with each tranche on its notional amount. The Prime plus 1% floored at 5% tranche will receive payments at a fixed rate of 5.81% and pay the counterparty at Prime plus 1% , floored at 5% on the notional amount. The Prime plus 2% and Prime plus 2% actual/365 tranches will receive payments at a fixed rate of 6.56% and pay the counterparty at Prime plus 2% on the notional amounts. The Prime plus 2.25% tranche will receive payments at a fixed rate of 6.81% and pay the counterparty at Prime plus 2.25% on the notional amount. The cash flow payments on the derivatives began March 2015 and terminate March 2021. During 2013, the Company entered into four interest rate swaps with Counterparty B to manage exposure against the variability in the expected future cash flows on the designated Prime, Prime plus 1% , Prime plus 1% floored at 5% and Prime plus 1% floored at 5.5% pools of its floating rate loan portfolio. The Company entered into the interest rate swap agreements to hedge the cash flows from these pools of its floating rate loan portfolio, which is expected to offset the variability in the expected future cash flows attributable to the fluctuations in the daily weighted average Wall Street Journal Prime index, which is a cash flow hedge of a forecasted transaction. The Company terminated the Prime and Prime plus 1% tranches in September 2015 (see September 2015 interest rate-prime swaps transaction above). The total notional amount of the remaining prime hedges is $180.0 million as of September 30, 2015 . The cash flow payments on the derivatives began September 2013 and terminate September 2019. Information pertaining to outstanding derivative instruments is as follows (in thousands): Derivative Assets Fair Value Derivative Liabilities Fair Value Balance Sheet Location September 30, 2015 December 31, 2014 Balance Sheet Location September 30, 2015 December 31, 2014 Derivatives designated as hedging instruments under ASC Topic 815: Interest rate swaps - Counterparty B Other Assets $ — $ — Other Liabilities $ 22,100 $ 15,995 Interest rate-prime swaps - Counterparty B Other Assets 4,687 3,042 Other Liabilities — — Interest rate swaps - Counterparty C Other Assets 1,599 37 Other Liabilities — — Interest rate-prime swaps - Counterparty C Other Assets — — Other Liabilities 3,516 — $ 6,286 $ 3,079 $ 25,616 $ 15,995 The Company entered into master netting arrangements with both Counterparty B and Counterparty C whereby the delayed interest rate swaps and hedges would be settled net. Net fair values of the Counterparty B and Counterparty C delayed interest rate swaps and hedges as of September 30, 2015 and December 31, 2014 were as follows (in thousands): September 30, 2015 Gross Amounts Presented in the Balance Sheet Gross Amounts Not Offset in the Balance Sheet Derivatives Collateral Net Derivatives subject to master netting arrangements: Derivative liabilities: Counterparty B $ 17,413 $ — $ — $ 17,413 Counterparty C 1,917 — — 1,917 Net derivative liability $ 19,330 $ — $ — $ 19,330 December 31, 2014 Gross Amounts Presented in the Balance Sheet Gross Amounts Not Offset in the Balance Sheet Derivatives Collateral Net Derivatives subject to master netting arrangements: Derivative liabilities: Counterparty B $ 12,953 $ — $ — $ 12,953 Net derivative liability $ 12,953 $ — $ — $ 12,953 Pursuant to the interest rate swap agreements described above with Counterparty B, the Company pledged collateral in the form of investment securities totaling $18.4 million (with a fair value at September 30, 2015 of $19.0 million ), which has been presented gross in the Company’s balance sheet. Pursuant to the interest rate swap agreements described above with Counterparty C, the Company pledged collateral in the form of investment securities totaling $4.6 million (with a fair value at September 30, 2015 of $4.3 million ), which has been presented gross in the Company’s balance sheet. There was no collateral posted from the counterparties to the Company as of September 30, 2015 . For the three and nine month periods ended September 30, 2015 , the Company reclassified $0.3 million and $0.8 million, respectively, from accumulated other comprehensive income (loss) into interest expense as a result of the discontinuance of the cash flow hedge with Counterparty A. There were no amounts reclassified for the three and nine month periods ended September 30, 2015 from accumulated other comprehensive income (loss) into interest income as a result of the discontinuance of the cash flow hedges with Counterparty B. No amounts were reclassified into earnings for the three or nine month periods ended September 30, 2014 . As of September 30, 2015 and 2014 , no amounts of gains or losses have been reclassified from accumulated comprehensive income (loss), nor have any amounts of gains or losses been recognized due to ineffectiveness of a portion of the derivatives. At September 30, 2015 , no amount of the derivatives will mature within the next 12 months. The Company does not expect to reclassify any amount from accumulated other comprehensive income (loss) into interest income over the next 12 months for derivatives that will be settled. At September 30, 2015 and 2014 , and for the nine months then ended, information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows (in thousands): Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion) As of September 30, Derivatives in ASC Topic 815 Cash Flow Hedging Relationships: 2015 2014 Interest rate swap with Counterparty A $ (4,663 ) $ (2,408 ) Interest rate swap and prime swaps with Counterparty B (10,472 ) (6,477 ) Interest rate swap and prime swaps with Counterparty C (1,247 ) $ — Total $ (16,382 ) $ (8,885 )

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax benefit on the statement of income for the nine months ended September 30, 2015 and 2014 was as follows (in thousands): September 30, 2015 September 30, 2014 Current tax expense $ 2,149 $ — Deferred tax benefit (44,379 ) (16,354 ) Total tax benefit $ (42,230 ) $ (16,354 ) The amount of taxes in the accompanying consolidated statements of income is different from the expected amount using statutory federal income tax rates primarily due to the effect of various tax credits. As discussed in Note 7, the Company earns Federal NMTC, Federal Historic Rehabilitation, and Low-Income Housing tax credits, which reduce the Company’s federal income tax liability or create a carryforward as applicable. The Company is also required to reduce its tax basis of the investment in certain of the projects that generated the Federal NMTC or Federal Historic Rehabilitation tax credits by the amount of the credit generated in that year. No valuation allowance was recorded for the net deferred tax assets at September 30, 2015 and December 31, 2014, as the amounts will more likely than not be realized as reductions of future taxable income or by utilizing available tax planning strategies.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Off-Balance Sheet Arrangements The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These transactions include commitments to extend credit in the ordinary course of business to approved customers. Generally, loan commitments have been granted on a temporary basis for working capital or commercial real estate financing requirements or may be reflective of loans in various stages of funding. These commitments are recorded on the Company’s financial statements as they are funded. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Loan commitments include unused commitments for open-end lines secured by one to four family residential properties and commercial properties, commitments to fund loans secured by commercial real estate, construction loans, business lines of credit, and other unused commitments. Standby letters of credit are written conditional commitments issued by the Company to guarantee the performance of a customer to a third party. In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount of the commitment. If the commitment is funded, the Company would be entitled to seek recovery from the customer. The Company minimizes its exposure to loss under loan commitments and standby letters of credit by subjecting them to credit approval and monitoring procedures. The effect on the Company’s revenues, expenses, cash flows, and liquidity of the unused portions of these commitments cannot be reasonably predicted because there is no guarantee that the lines of credit will be used. The liability for losses on unfunded commitments totaled $0.3 million and $0.2 million at September 30, 2015 and December 31, 2014, respectively. The following is a summary of the total notional amount of loan commitments and standby letters of credit outstanding at September 30, 2015 and December 31, 2014 (in thousands): September 30, 2015 December 31, 2014 Standby letters of credit $ 98,688 $ 110,636 Unused loan commitments 754,618 509,665 Total $ 853,306 $ 620,301

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity Series C Convertible Perpetual Preferred Stock In June 2015, the holder of the Series C preferred stock exchanged 364,983 shares of Series C preferred stock for an equivalent number of shares of common stock. During 2013, the holder of the Series C preferred stock converted 551,858 shares into an equivalent number of shares of common stock. The Company issued 916,841 shares of Series C preferred stock to the holder in 2011. There were no shares of the Company's Series C preferred stock outstanding as of September 30, 2015 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income The components of accumulated other comprehensive income (loss) and changes in those components are presented in the following table (in thousands): Cash Flow Hedges(1) Terminated Cash Flow Hedges(2) Transfers of Available for Sale Securities to Held to Maturity Available for Sale Securities Total Balance at January 1, 2015 $ (8,396 ) $ (5,194 ) $ (3,354 ) $ (2,793 ) $ (19,737 ) Other comprehensive income (loss) before income taxes: Net change in unrealized gain (loss) (6,414 ) 1,326 — 4,094 (994 ) Reclassification of net losses realized and included in earnings — 792 — — 792 Amortization of unrealized net gain — — 501 — 501 Income tax expense (benefit) (2,245 ) 741 176 1,433 105 Balance at September 30, 2015 $ (12,565 ) $ (3,817 ) $ (3,029 ) $ (132 ) $ (19,543 ) Cash Flow Hedges(1) Transfers of Available for Sale Securities to Held to Maturity Available for Sale Securities Total Balance at January 1, 2014 $ (2,054 ) $ (3,710 ) $ (10,751 ) $ (16,515 ) Other comprehensive income (loss) before income taxes: Net change in unrealized gain (loss) (10,509 ) — 10,164 (345 ) Reclassification of net gains realized and included in earnings — — (135 ) (135 ) Amortization of unrealized net gain — 386 — 386 Income tax expense (benefit) (3,678 ) 135 3,511 (32 ) Balance at September 30, 2014 $ (8,885 ) $ (3,459 ) $ (4,233 ) $ (16,577 ) (1) Balances in the Cash Flow Hedges column represent the net operating changes in all of the Company's cash flow hedge relationships as of the dates stated. (2) Balances in the Terminated Cash Flow Hedges column represent the net unrealized loss at termination of a certain interest rate swap cash flow hedge relationship and the net unrealized gains at termination of certain interest rate-prime swap cash flow hedge relationships. See Note 10 for further explanation on the terminated cash flow hedges.

Capital Requirements and Other

Capital Requirements and Other Regulatory Matters	9 Months Ended
	Sep. 30, 2015
Banking and Thrift [Abstract]
Capital Requirements and Other Regulatory Matters	Capital Requirements and Other Regulatory Matters The Company and the Bank are subject to various regulatory capital requirements administered by federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the consolidated financial statements of the Company and the Bank. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of total and Tier 1 capital to risk-weighted assets, Tier 1 capital to average assets, and common equity tier 1 to risk-weighted assets. Management believes, as of September 30, 2015 and December 31, 2014 , that the Company and the Bank met all capital adequacy requirements to which they are subject. As of September 30, 2015 , the Bank was in compliance with all regulatory requirements and the Bank was classified as “well capitalized” for purposes of the Federal Deposit Insurance Corporation's prompt corrective action requirements. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based, Tier 1 leverage, and common equity tier 1 ratios as set forth in the following table. There are no conditions or events since the notification that management believes have changed that categorization. The following tables present the actual capital amounts and regulatory capital ratios for the Company and the Bank as of September 30, 2015 and December 31, 2014 : September 30, 2015 "Well Capitalized" Minimums Actual (in thousands) Ratio Amount First NBC Bank Holding Company Tier 1 leverage capital 9.53 % $ 395,680 Tier 1 risk-based capital 10.47 % 395,680 Total risk-based capital 13.33 % 503,785 Common equity tier 1 risk-based capital 10.47 % 395,680 First NBC Bank Tier 1 leverage capital 5.00 % 10.23 % $ 424,150 Tier 1 risk-based capital 8.00 % 11.24 % 424,150 Total risk-based capital 10.00 % 12.51 % 472,195 Common equity tier 1 risk-based capital 6.50 % 11.24 % 424,150 December 31, 2014 "Well Capitalized" Minimums Actual (in thousands) Ratio Amount First NBC Bank Holding Company Tier 1 leverage capital 10.66 % $ 387,224 Tier 1 risk-based capital 11.59 % 387,224 Total risk-based capital 12.84 % 428,962 Common equity tier 1 risk-based capital NA NA First NBC Bank Tier 1 leverage capital 5.00 % 9.95 % $ 361,078 Tier 1 risk-based capital 6.00 % 10.82 % 361,078 Total risk-based capital 10.00 % 12.07 % 402,816 Common equity tier 1 risk-based capital NA NA NA

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments ASC 820, Fair Value Measurements and Disclosures, clarifies the principle that fair value should be based on the assumptions that market participants would use when pricing the asset or liability and establishes a fair value hierarchy that prioritizes the inputs used to develop those assumptions and measure fair value. The hierarchy requires companies to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows: • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies, and similar techniques that use significant unobservable inputs. A description of the valuation methodologies used for instruments measured at fair value follows, as well as the classification of such instruments within the valuation hierarchy. Securities are classified within Level 1 when quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. If quoted market prices are unavailable, fair value is estimated using pricing models or quoted prices of securities with similar characteristics, at which point the securities would be classified within Level 2 of the hierarchy. Examples include certain available for sale securities. The Company’s investment portfolio did not include Level 3 securities as of September 30, 2015 and December 31, 2014 . The Company has segregated all financial assets and liabilities that are measured at fair value on a recurring basis into the most appropriate level within the fair value hierarchy, based on the inputs used to determine the fair value at the measurement date in the tables below (in thousands): September 30, 2015 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Available for sale securities: U.S. government agency securities $ 154,652 $ — $ 154,652 $ — U.S. Treasury securities 12,886 — 12,886 — Municipal securities 12,219 — 12,219 — Mortgage-backed securities 54,997 — 54,997 — Corporate bonds 7,989 — 7,989 — Other equity securities 22 22 — — Other debt securities 30,937 — 30,937 — Total $ 273,702 $ 22 $ 273,680 $ — Liabilities Derivative instruments $ 19,330 $ — $ 19,330 $ — December 31, 2014 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Available for sale securities: U.S. government agency securities $ 157,527 $ — $ 157,527 $ — U.S. Treasury securities 12,610 — 12,610 — Municipal securities 12,246 — 12,246 — Mortgage-backed securities 57,087 — 57,087 — Corporate bonds 8,177 — 8,177 — $ 247,647 $ — $ 247,647 $ — Derivative instruments 37 — 37 — Total $ 247,684 $ — $ 247,684 $ — Liabilities Derivative instruments $ 12,953 $ — $ 12,953 $ — The Company has segregated all financial assets and liabilities that are measured at fair value on a nonrecurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date in the tables below (in thousands): September 30, 2015 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Loans $ 31,760 $ — $ — $ 31,760 Other real estate owned 2,864 — — 2,864 $ 34,624 $ — $ — $ 34,624 December 31, 2014 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Loans $ 20,679 $ — $ — $ 20,679 Other real estate owned 3,022 — — 3,022 $ 23,701 $ — $ — $ 23,701 In accordance with ASC Topic 310, the Company records loans and other real estate considered impaired at the lower of cost or fair value. Impaired loans, recorded at fair value, are Level 3 assets measured using appraisals from external parties of the collateral, less any prior liens primarily using the market or income approach. The Company did not record any liabilities at fair value for which measurement of the fair value was made on a nonrecurring basis during the nine months ended September 30, 2015 or the year ended December 31, 2014 . ASC 820 requires the disclosure of the fair value for each class of financial instruments for which it is practicable to estimate. The fair value of a financial instrument is the current amount that would be exchanged between willing parties, other than in a forced liquidation. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. ASC 820 excludes certain financial instruments and all nonfinancial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company. The following methods and assumptions were used to estimate the fair value of each class of financial instrument for which it is practicable to estimate that value. Cash and Due from Banks and Short-Term Investments The carrying amounts of these short-term instruments approximate their fair values and would be classified within Level 1 of the hierarchy. Investment in Short-Term Receivables The carrying amounts of these short-term receivables approximate their fair value and would be classified within Level 1 of the hierarchy. Investment Securities Securities are classified within Level 1 where quoted market prices are available in the active market. If quoted market prices are unavailable, fair value is estimated using pricing models or quoted prices of securities with similar characteristics, at which point the securities would be classified within Level 2 of the hierarchy. Inputs include securities that have quoted prices in active markets for identical assets. Loans For variable-rate loans that reprice frequently and have no significant change in credit risk, fair values are based on carrying values. Fair values for fixed-rate commercial real estate, commercial loans, and consumer loans are estimated using discounted cash flow analyses using interest rates currently being offered for loans with similar terms and borrowers of similar credit quality. Fair value of mortgage loans held for sale is based on commitments on hand from investors or prevailing market rates. The fair value associated with the loans includes estimates related to expected prepayments and the amount and timing of undiscounted expected principal, interest and other cash flows, which would be classified as Level 3 of the hierarchy. Bank-Owned Life Insurance The carrying amounts of the bank-owned life insurance policies are recorded at cash surrender value, which approximate their fair values and would be classified within Level 1 of the hierarchy. Deposits The fair values disclosed for demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is, their carrying amounts) and would be categorized within Level 2 of the fair value hierarchy. The carrying amounts of variable-rate, fixed-term money market accounts approximate their fair values at the reporting date. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. The fair value of the Company’s interest-bearing deposits would, therefore, be categorized within Level 3 of the fair value hierarchy. Short-Term Borrowings and Repurchase Agreements The carrying amounts of these short-term instruments approximate their fair values and would be classified within Level 2 of the hierarchy. Long-Term Borrowings The fair values of long-term borrowings are estimated using discounted cash flows analyses based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements. The fair value of the Company’s long-term debt would, therefore, be categorized within Level 3 of the fair value hierarchy. Derivative Instruments Fair values for interest rate swap agreements are based upon the amounts required to settle the contracts. The derivative instruments are classified within Level 2 of the fair value hierarchy. The estimated fair values of the Company’s financial instruments were as follows as of the dates indicated (in thousands): Fair Value Measurements at September 30, 2015 Carrying Amount Total Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 33,759 $ 33,759 $ 33,759 $ — $ — Short-term investments 179,526 179,526 179,526 — — Investment in short-term receivables 182,945 182,945 182,945 — — Investment securities available for sale 273,702 273,702 22 273,680 — Investment securities held to maturity 83,319 84,601 — 84,601 — Loans and loans held for sale 3,121,501 3,103,534 — — 3,103,534 Cash surrender value of bank-owned life insurance 48,342 48,342 48,342 — — Financial Liabilities: Deposits, noninterest-bearing 416,405 416,405 — 416,405 — Deposits, interest-bearing 3,200,513 3,162,486 — — 3,162,486 Repurchase agreements 93,775 93,775 — 93,775 — Long-term borrowings 103,392 106,591 — — 106,591 Derivative instruments 19,330 19,330 — 19,330 — Fair Value Measurements at December 31, 2014 Carrying Amount Total Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 32,484 $ 32,484 $ 32,484 $ — $ — Short-term investments 18,404 18,404 18,404 — — Investment in short-term receivables 237,135 237,135 237,135 — — Investment securities available for sale 247,647 247,647 — 247,647 — Investment securities held to maturity 89,076 90,956 — 90,956 — Loans and loans held for sale 2,775,886 3,003,280 — — 3,003,280 Cash surrender value of bank-owned life insurance 47,289 47,289 47,289 — — Derivative instruments 37 37 — 37 — Financial Liabilities: Deposits, noninterest-bearing 364,534 364,534 — 364,534 — Deposits, interest-bearing 2,756,316 2,722,134 — — 2,722,134 Repurchase agreements 117,991 117,991 — 117,991 — Long-term borrowings 40,000 42,270 — — 42,270 Derivative instruments 12,953 12,953 — 12,953 —

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events During October 2015, the Company received the approval of the Federal Reserve Bank of Atlanta to complete the acquisition of State Investors Bancorp, Inc., the holding Company of State-Investors Bank, having previously received approvals of the Federal Deposit Insurance Corporation and the Louisiana Office of Financial Institutions. The transaction is expected to close on or about November 30, 2015, subject to the satisfaction of remaining conditions.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations The Company is a bank holding company that offers a broad range of financial services through First NBC Bank, a Louisiana state non-member bank, to businesses, institutions, and individuals in southeastern Louisiana, the Mississippi Gulf Coast, and the Florida panhandle. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States and to prevailing practices within the banking industry.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include the accounts of the Company and First NBC Bank, and First NBC Bank’s wholly owned subsidiaries, which include First NBC Community Development, LLC (FNBC CDC) and First NBC Community Development Fund, LLC (FNBC CDE) (collectively referred to as the Bank), and any variable interest entities (VIE) of which the Company is the primary beneficiary. Substantially all of the VIEs for which the Company is the primary beneficiary relate to tax credit investments. FNBC CDC is a Community Development Corporation formed to construct, purchase, and renovate affordable residential real estate properties in the New Orleans area. FNBC CDE is a Community Development Entity (CDE) formed to apply for and receive allocations of Federal New Markets Tax Credits (NMTC).
Investments in Tax Credit Entities	Investments in Tax Credit Entities As part of its Community Reinvestment Act responsibilities and due to their favorable economics, the Company invests in tax credit-motivated projects. These projects are directed at tax credits issued under Low-Income Housing, Federal Historic Rehabilitation, and Federal New Markets Tax Credits. The Company generates its returns on tax credit motivated projects through the receipt of federal, and if applicable, state tax credits as well as equity returns. The federal tax credits are recorded as an offset to the income tax provision in the year that they are earned under federal income tax law – over 10 to 15 years, beginning in the year in which rental activity commences for Low-Income Housing credits, in the year of the issuance of the certificate of occupancy and the property being placed into service for Federal Historic Rehabilitation credits, and over 7 years for Federal NMTC upon the investment of funds into the CDE. These credits, if not used in the tax return for the year of origination, can be carried forward for 20 years. The state credits are recorded in income when earned usually when the project is placed in service and sold to investors after the tax credits have been transferred from the project to the Company. The Company invests in Low-Income Housing credits, which the Company invests in a tax credit entity, usually a limited liability company, which owns the real estate. The Company receives a 99.99% nonvoting interest in the entity that must be retained during the compliance period for the credits ( 15 years). Control of the tax credit entity rests in the .01% interest general partner, who has the power and authority to make decisions that impact economic performance of the project and is required to oversee and manage the project. The Company accounts for its investment in Low-Income Housing credits utilizing the equity method of accounting and evaluates its investment at the end of each reporting period for impairment and any residual returns are expected to be minor. For Federal Historic Rehabilitation credits, the Company invests in a tax credit entity, usually a limited liability company, which owns the real estate. The Company receives a 99% interest that must be retained during the compliance period for the credits ( 5 years). In most cases, the Company’s interest in the entity is generally reduced from a 99% interest to a 5% to 25% interest at the end of the compliance period. Control of the tax credit entity rests in the 1% interest general partner, who has the power and authority to make decisions that impact economic performance of the project and is required to oversee and manage the project. The Company accounts for its investment in Federal Historic Rehabilitation credits utilizing the equity method of accounting and evaluates its investment at the end of each reporting period for impairment. For Federal NMTC, a different structure is required by federal tax law. In order to distribute Federal NMTC, the federal government allocates such credits to CDEs. The Company invests in both CDEs formed by unaffiliated parties and in CDEs formed by the Company. Projects must be commercial or real estate operations and are qualified by their location in low- income areas or by their employment of, or service to, low-income citizens. A CDE, in most cases, creates a special-purpose subsidiary for each project through which the credits are allocated and through which the proceeds from the tax credit investor and a leverage lender, if applicable, flow through to the project, which in turn generate the credit. The credits are calculated at 39% of the total CDE allocation to the project at the rate of 5% for the first three years and 6% for the next four years. Federal tax law requires special terms benefiting the qualified project, which can include below-market interest rates. The Company evaluates its investment for impairment under the equity method of accounting at the end of each reporting period at the time the tax credits are earned on the project over the seven -year compliance period and any residual returns are expected to be minor. When the Company also has a loan to the project, it is reported as a loan in the consolidated balance sheet, as the Company has credit exposure to the project and the loan is repaid at the end of the compliance period (in general, the debt has no principal payments during the compliance period but the Company may require the project to fund a sinking fund over the compliance period to achieve the same risk reduction effect as if principal is being amortized). When the Company is the tax credit investor in a CDE formed by an unaffiliated party, it has no control of the applicable CDE or the CDE’s special-purpose subsidiary. When a project is funded through FNBC CDE, the Company consolidates its CDE and the specifically formed special-purpose entities since it maintains control over these entities. As part of the activities of FNBC CDE, the Company makes investments in the CDE for purposes of providing equity to the projects sponsored by the FNBC CDE. When a project is funded through FNBC CDE, the CDE will receive a CDE fee at the time of the project's closing of approximately 4% and an annual fee of 0.5% of the qualified equity investment in the project. The annual fee is received until the end of the Federal NMTC compliance period. The CDE fee earned is recorded in the consolidated statement of income as a component of noninterest income. The Company will pay a fee to the CDE when the project is funded through a CDE other than FNBC CDE at the time of a project's closing for the allocation of the credits. The fee is recorded as a component of noninterest expense in the Company's consolidated statement of income over the Federal NMTC compliance period. The Company has the risk of credit recapture if the project fails during the compliance period for Low-Income Housing and Federal Historic Rehabilitation transactions. For Federal NMTC transactions, the risk of credit recapture exists if investment requirements are not maintained during the compliance period. Such events, although rare, are accounted for when they occur and no such events have occurred to date. The Company has the ability to invest in Louisiana State Historic Rehabilitation tax credits due to its limited partner interest in several tax-advantaged limited partnerships whose purpose is to invest in approved Federal Historic Rehabilitation tax credit projects. The Company holds these equity investments until the State Historic Rehabilitation tax credits are sold to a third party and the Company evaluates its investment for impairment at the end of each reporting period. Impairment, if any, is recorded in its consolidated statement of income as a component of noninterest expense.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are susceptible to a significant change in the near term are the allowance for loan losses, income tax provision, fair value adjustments, impairment on tax credit investments and share-based compensation.
Concentration of Credit Risk	Concentration of Credit Risk The Company’s loan portfolio consists of the various types of loans described in Note 5. Real estate or other assets secure most loans. The majority of these loans have been made to individuals and businesses in the Company’s market area of southeastern Louisiana, southern Mississippi, and the Florida panhandle, which are dependent on the area economy for their livelihoods and servicing of their loan obligations. The Company does not have any significant concentrations with respect to any one industry or customer. The Company maintains deposits in other financial institutions that may, from time to time, exceed the federally insured deposit limits.
Reclassifications	Reclassifications Certain reclassifications have been made to prior period balances to conform to the current period presentation.
Recent Accounting Pronouncements	Recent Accounting Pronouncements ASU No. 2014-09 In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 205): An Amendment of the FASB Accounting Standards Codification , which clarifies the principles for recognizing revenue from contracts with customers. The new accounting guidance, which does not apply to financial instruments, is effective on a retrospective basis for annual reporting periods beginning after December 15, 2017, with early adoption permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2014-12 In June 2014, the FASB issued ASU No. 2014-12 Compensation-Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could be Achieved after the Requisite Service Period, which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is intended to resolve the diverse accounting treatments of these types of awards in practice and is effective for annual and interim periods beginning after December 15, 2015. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2014-13 In August 2014, the FASB issued ASU No. 2014-13, Consolidation (Topic 810): Measuring the Financial Assets and Financial Liabilities of a Consolidated Collateralized Financing Entity , which will allow an alternative fair value measurement approach for consolidated collateralized financing entities (CFEs) to eliminate a practice issue that results in measuring the fair value of a CFE’s financial assets at a different amount from the fair value of its financial liabilities even when the financial liabilities have recourse to only the financial assets. The approach would permit the parent company of a consolidated CFE to measure the CFE’s financial assets and financial liabilities based on the more observable of the fair value of the financial assets and the fair value of the financial liabilities. The new accounting guidance is for the annual period ending after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted as of the beginning of an annual period. The Company does not expect the new guidance to have a material impact on the Company’s financial condition or results of operations. ASU No. 2014-15 In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern , which will require management to assess an entity’s ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards in connection with preparing financial statements for each annual and interim reporting period. The new accounting guidance is for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-02 In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis, which eliminates the deferral of FAS 167 and makes changes to both the variable interest model and the voting model. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-03 In April 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs , which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-05 In April 2015, the FASB issued ASU No. 2015-05, Intangibles-Goodwill and Other Internal-Use Software (Subtopic 350-40) Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement , which provides guidance to clarify a customer’s accounting for fees paid in a cloud computing arrangement. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter, with early application permitted. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-15 In August 2015, the FASB issued ASU No. 2015-15, Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements: Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting , which amends ASC 835-30. ASU 2015-03, issued in April 2015, requires entities to present debt issuance costs related to a recognized debt liability as a direct deduction from the carrying amount of that debt liability. The guidance in ASU 2015-03 does not address presentation or subsequent measurement of debt issuance costs related to line-of-credit arrangements. Given the absence of authoritative guidance within ASU 2015-03 for debt issuance costs related to line-of-credit arrangements, ASU 2015-15 states the SEC staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing that deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. This update became effective upon announcement on June 18, 2015. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations. ASU No. 2015-16 In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments , which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined as if the accounting had been completed at the acquisition date. The new accounting guidance is for the annual period beginning after December 15, 2015, and for annual periods and interim periods thereafter. The amendments in this update should be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update with early application permitted for financial statements that have not been issued. The Company does not expect the new guidance to have a material impact on the Company's financial condition or results of operations.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Schedule of Error Corrections in Investments of Tax Credit Entities	Such changes were reflected in the financial results for the three and six month periods ended June 30, 2015 and are summarized as follows: For the Three Months Ended For the Three Months Ended For the Six Months Ended June 30, 2015 For the Six Months Ended June 30, 2015 (In thousands) Pre-Tax Net of tax Pre-Tax Net of tax Low-Income Housing (1) $ (253 ) $ (164 ) $ (353 ) $ (229 ) Federal Historic Rehabilitation (1) 177 115 358 232 Total investment in tax credit entities impairment (1) (76 ) (49 ) 5 3 Low-Income Housing investment VIE consolidation loss (2) (1,029 ) (669 ) (1,181 ) (768 ) Net loss impact of error corrections $ (1,105 ) $ (718 ) $ (1,176 ) $ (765 ) Basic earnings per share (3) $ (0.06 ) $ (0.04 ) $ (0.06 ) $ (0.04 ) (1) The amounts above represent the cumulative net impact of the reversal of previously recorded amortization and equity income or loss and impairment that should have been recorded on the Company's consolidated statement of income and balance sheets as of and for the three and six month periods ended June 30, 2015. (2) See Note 8 for the impact on the Company's consolidated balance sheets as of June 30, 2015. (3) The amounts above represent the net impact of the cumulative errors in accounting for certain of the Company's investments in tax credit entities on the calculation of earnings per share for the three and six month periods ended June 30, 2015. During the third quarter of 2015, the Company utilized the guidance provided in Accounting Standards Codification (ASC) Topic 250 as well as SEC Staff Accounting Bulletins (SAB) No. 99 and No. 108. The guidance required the Company to evaluate and assess the materiality of these errors both qualitatively and quantitatively, and the Company concluded that these errors did not materially misstate previously issued financial statements for any prior periods. As a result, amendment of the Company’s previously filed Quarterly Reports on Form 10-Q and Annual Reports on Form 10-K was not required. Such changes were reflected in the financial results for the three and nine month periods ended September 30, 2015 and are summarized as follows: For the Three Months Ended For the Three Months Ended For the Nine Months Ended September 30, 2015 For the Nine Months Ended September 30, 2015 (In thousands) Pre-Tax Net of tax Pre-Tax Net of tax Low-Income Housing (1) $ 7 $ 5 $ (346 ) $ (225 ) Federal & State Historic Rehabilitation (1) (199 ) (129 ) 358 233 Federal New Markets Tax Credits (1) 2,589 1,683 3,316 2,155 Total investment in tax credit entities impairment (1) 2,397 1,559 3,328 2,163 Low-Income Housing investment VIE consolidation loss (2) (610 ) (397 ) (1,791 ) (1,164 ) Net income impact of error corrections $ 1,787 $ 1,162 $ 1,537 $ 999 Basic earnings per share (3) $ 0.10 $ 0.06 $ 0.08 $ 0.05 (1) The amounts above represent the cumulative net impact of the reversal of previously recorded amortization and equity income or loss and impairment that should have been recorded on the Company's consolidated statement of income and balance sheets as of and for the three and nine month periods ended September 30, 2015. (2) See Note 8 for the impact on the Company's consolidated balance sheets as of September 30, 2015. (3) The amounts above represent the net impact of the cumulative errors in accounting for certain of the Company's investments in tax credit entities on the calculation of earnings per share for the three and nine month periods ended September 30, 2015.

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Schedule of Acquired Assets and Liabilities	The acquired assets and liabilities, as well as the adjustments to record the assets and liabilities at their estimated fair values, are presented in the following table: (In thousands) As Acquired Preliminary Fair Value Adjustments As recorded by First NBC Bank Assets Cash and due from banks $ 1,511 $ — $ 1,511 Short-term investments 19,971 — 19,971 Investment securities-available for sale 9,559 — 9,559 Loans 27,647 (1,203 ) (1) 26,444 Bank premises 3,120 — 3,120 Core deposit intangible — 188 (2) 188 Other assets 455 — 455 Total Assets $ 62,263 $ (1,015 ) $ 61,248 Liabilities Deposits: Non-interest bearing $ 22,680 $ — $ 22,680 Interest bearing 49,584 16 (3) 49,600 Total deposits 72,264 16 72,280 Other liabilities 34 — 34 Total Liabilities $ 72,298 $ 16 $ 72,314 (1) The amount represents the adjustment of the book value of First National Bank of Crestview's loans to their estimated fair value based on current interest rates and expected cash flows, which includes estimates of expected credit losses inherent in the portfolio. (2) The amount represents the estimated fair value of the core deposit intangible asset created in the acquisition. (3) The adjustment is necessary because the weighted average interest rate of First National Bank of Crestview's deposits exceeded the cost of similar funding at the time of acquisition. The fair value adjustment will be amortized to reduce future interest expense over the life of the portfolio, which is estimated at 49 months .

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Net Income Per Common Share	The following table sets forth the computation of basic net income per common share and diluted net income per common share: For the Three Months Ended For the Nine Months Ended (In thousands, except per share data) 2015 2014 2015 2014 Basic: Income available to common shareholders $ 18,106 $ 13,989 $ 50,874 $ 38,837 Weighted-average common shares outstanding 18,630 18,556 18,737 18,530 Basic earnings per share $ 0.97 $ 0.75 $ 2.72 $ 2.10 Diluted: Income available to common shareholders $ 18,106 $ 13,989 $ 50,874 $ 38,837 Weighted-average common shares outstanding 18,630 18,556 18,737 18,530 Effect of dilutive securities: Stock options outstanding 420 381 407 382 Restricted shares outstanding 6 — 3 — Warrants 115 117 119 118 Weighted-average common shares outstanding – assuming dilution 19,171 19,054 19,266 19,030 Diluted earnings per share $ 0.94 $ 0.73 $ 2.64 $ 2.04

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Market Values of Investment Securities with Gross Unrealized Gains and Losses	The amortized cost and market values of investment securities, with gross unrealized gains and losses, as of September 30, 2015 and December 31, 2014 , were as follows (in thousands): September 30, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Less Than One Year Greater Than One Year Available for sale: U.S. government agency securities $ 154,786 $ 943 $ (267 ) $ (810 ) $ 154,652 U.S. Treasury securities 13,016 — — (130 ) 12,886 Municipal securities 12,130 163 — (74 ) 12,219 Mortgage-backed securities 54,863 568 (429 ) (5 ) 54,997 Corporate bonds 8,144 — (155 ) — 7,989 Other equity securities 22 — — — 22 Other debt securities 30,946 — (9 ) — 30,937 $ 273,907 $ 1,674 $ (860 ) $ (1,019 ) $ 273,702 Held to maturity: Municipal securities $ 38,989 $ 1,997 $ — $ (9 ) $ 40,977 Mortgage-backed securities 44,330 583 (1,130 ) (159 ) 43,624 $ 83,319 $ 2,580 $ (1,130 ) $ (168 ) $ 84,601 December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Market Value Less Than One Year Greater Than One Year Available for sale: U.S. government agency securities $ 161,461 $ 891 $ — $ (4,825 ) $ 157,527 U.S. Treasury securities 13,019 — — (409 ) 12,610 Municipal securities 12,175 107 (36 ) — 12,246 Mortgage-backed securities 57,025 635 (137 ) (436 ) 57,087 Corporate bonds 8,263 — — (86 ) 8,177 $ 251,943 $ 1,633 $ (173 ) $ (5,756 ) $ 247,647 Held to maturity: Municipal securities $ 41,255 $ 2,182 $ (62 ) $ — $ 43,375 Mortgage-backed securities 47,821 1,098 (208 ) (1,130 ) 47,581 $ 89,076 $ 3,280 $ (270 ) $ (1,130 ) $ 90,956
Summary of Amortized Cost and Estimated Market Values by Contractual Maturity of Investment Securities	The amortized cost and estimated market values by contractual maturity of investment securities as of September 30, 2015 and December 31, 2014 are shown in the following table (in thousands). Mortgage-backed securities have been allocated based on expected maturities. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2015 December 31, 2014 Weighted Average Yield Amortized Cost Estimated Market Value Weighted Average Yield Amortized Cost Estimated Market Value Available for sale: Due in one year or less 1.34 % $ 48,124 $ 48,300 1.78 % $ 571 $ 573 Due after one year through five years 2.19 67,484 68,208 2.64 51,037 51,916 Due after five years through ten years 2.00 135,643 135,130 2.02 176,631 172,012 Due after ten years 3.25 22,656 22,064 3.34 23,704 23,146 Total securities 2.01 % $ 273,907 $ 273,702 2.27 % $ 251,943 $ 247,647 Held to maturity: Due in one year or less 10.63 % $ 4,469 $ 4,405 3.88 % $ 2,045 $ 2,003 Due after one year through five years 3.98 37,307 38,289 4.16 20,921 21,875 Due after five years through ten years 3.81 24,037 24,670 3.39 32,618 33,898 Due after ten years 3.31 17,506 17,237 3.30 33,492 33,180 Total securities 4.14 % $ 83,319 $ 84,601 3.55 % $ 89,076 $ 90,956

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Summary of Major Classifications of Loans	Major classifications of loans at September 30, 2015 and December 31, 2014 were as follows (in thousands): September 30, 2015 December 31, 2014 Commercial real estate loans: Construction $ 451,713 $ 316,492 Mortgage(1) 1,301,897 1,252,225 1,753,610 1,568,717 Consumer real estate loans: Construction 8,676 10,393 Mortgage 153,520 131,031 162,196 141,424 Commercial and industrial loans 1,133,114 1,016,414 Loans to individuals, excluding real estate 20,681 18,316 Nonaccrual loans 35,653 21,228 Other loans 13,600 8,165 3,118,854 2,774,264 Less allowance for loan losses (53,076 ) (42,336 ) Loans, net $ 3,065,778 $ 2,731,928 (1) Included in commercial real estate loans, mortgage, are owner-occupied real estate loans of $421.2 million at September 30, 2015 and $419.3 million at December 31, 2014 . These loans were classified in the Company's loan portfolio at September 30, 2015 and December 31, 2014 as follows (in thousands): September 30, 2015 December 31, 2014 Construction $ 45,353 $ 80,741 Commercial real estate 71,305 67,520 Commercial and industrial 137,555 117,191 Total loans $ 254,213 $ 265,452
Summary of Changes in Allowance for Loan Losses	A summary of changes in the allowance for loan losses during the three and nine months ended September 30, 2015 and September 30, 2014 is as follows (in thousands): For the Three Months Ended September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Balance, beginning of period $ 50,351 $ 37,403 $ 42,336 $ 32,143 Provision charged to operations 3,000 3,000 11,600 9,000 Charge-offs (287 ) (137 ) (1,192 ) (906 ) Recoveries 12 34 332 63 Balance, end of period $ 53,076 $ 40,300 $ 53,076 $ 40,300
Summary of Allowance for Loan Losses and Recorded Investment in Loans	The allowance for loan losses and recorded investment in loans, including loans acquired with deteriorated credit quality, as of the dates indicated are as follows (in thousands): September 30, 2015 Construction Commercial Real Estate Consumer Real Estate Commercial and Industrial Consumer Total Allowance for loan losses: Balance, beginning of period $ 4,030 $ 14,965 $ 3,316 $ 19,814 $ 211 $ 42,336 Charge-offs (12 ) (783 ) (55 ) (289 ) (53 ) (1,192 ) Recoveries — 246 4 67 15 332 Provision 2,298 2,996 462 5,844 — 11,600 Balance, end of period $ 6,316 $ 17,424 $ 3,727 $ 25,436 $ 173 $ 53,076 Ending balances: Individually evaluated for impairment $ 6 $ 4,024 $ 324 $ 9,070 $ — $ 13,424 Collectively evaluated for impairment $ 6,310 $ 13,400 $ 3,403 $ 16,366 $ 173 $ 39,652 Loans receivable: Ending balance-total $ 461,459 $ 1,313,173 $ 156,498 $ 1,166,889 $ 20,835 $ 3,118,854 Ending balances: Individually evaluated for impairment $ 754 $ 13,053 $ 3,058 $ 20,210 $ 71 $ 37,146 Collectively evaluated for impairment $ 460,705 $ 1,300,120 $ 153,440 $ 1,146,679 $ 20,764 $ 3,081,708 September 30, 2014 Construction Commercial Real Estate Consumer Real Estate Commercial and Industrial Consumer Total Allowance for loan losses: Balance, beginning of period $ 2,790 $ 13,780 $ 2,656 $ 12,677 $ 240 $ 32,143 Charge-offs (18 ) (441 ) (47 ) (304 ) (96 ) (906 ) Recoveries — 1 — 46 16 63 Provision 1,325 2,228 347 5,011 89 9,000 Balance, end of period $ 4,097 $ 15,568 $ 2,956 $ 17,430 $ 249 $ 40,300 Ending balances: Individually evaluated for impairment $ — $ 1,471 $ 938 $ 2,180 $ 1 $ 4,590 Collectively evaluated for impairment $ 4,097 $ 14,097 $ 2,018 $ 15,250 $ 248 $ 35,710 Loans receivable: Ending balance-total $ 318,145 $ 1,219,682 $ 131,027 $ 1,008,174 $ 21,591 $ 2,698,619 Ending balances: Individually evaluated for impairment $ 927 $ 13,942 $ 2,066 $ 5,636 $ 3 $ 22,574 Collectively evaluated for impairment $ 317,218 $ 1,205,740 $ 128,961 $ 1,002,538 $ 21,588 $ 2,676,045
Summary of Credit Quality Indicators on Company's Loan Portfolio	Credit quality indicators on the Company’s loan portfolio, including loans acquired with deteriorated credit quality, as of the dates indicated were as follows (in thousands): September 30, 2015 Pass and Pass/Watch Special Mention Substandard Doubtful Total Construction $ 446,121 $ — $ 15,338 $ — $ 461,459 Commercial real estate 1,258,670 12,334 42,169 — 1,313,173 Consumer real estate 150,261 56 6,181 — 156,498 Commercial and industrial 1,050,880 6,995 94,014 15,000 1,166,889 Consumer 20,630 4 201 — 20,835 Total loans $ 2,926,562 $ 19,389 $ 157,903 $ 15,000 $ 3,118,854 December 31, 2014 Pass and Pass/Watch Special Mention Substandard Doubtful Total Construction $ 313,987 $ 2 $ 13,688 $ — $ 327,677 Commercial real estate 1,215,673 1,613 47,085 — 1,264,371 Consumer real estate 128,507 60 4,383 — 132,950 Commercial and industrial 1,005,829 — 24,800 — 1,030,629 Consumer 18,247 7 383 — 18,637 Total loans $ 2,682,243 $ 1,682 $ 90,339 $ — $ 2,774,264
Age Analysis of Past Due Loans Including Loans Acquired with Deteriorated Credit Quality	An aged analysis of past due loans, including loans acquired with deteriorated credit quality, as of the dates indicated is as follows (in thousands): September 30, 2015 Greater Than 30 and Fewer Than 90 Days Past Due 90 Days and Greater Past Due Total Past Due Current Loans Total Loans Real estate loans: Construction $ 13 $ 1,069 $ 1,082 $ 460,377 $ 461,459 Commercial real estate 898 9,986 10,884 1,302,289 1,313,173 Consumer real estate 1,228 1,712 2,940 153,558 156,498 Total real estate loans 2,139 12,767 14,906 1,916,224 1,931,130 Other loans: Commercial and industrial 67 5,172 5,239 1,161,650 1,166,889 Consumer 283 182 465 20,370 20,835 Total other loans 350 5,354 5,704 1,182,020 1,187,724 Total loans $ 2,489 $ 18,121 $ 20,610 $ 3,098,244 $ 3,118,854 December 31, 2014 Greater Than 30 and Fewer Than 90 Days Past Due 90 Days and Greater Past Due Total Past Due Current Loans Total Loans Real estate loans: Construction $ 97 $ 750 $ 847 $ 326,830 $ 327,677 Commercial real estate 2,497 9,545 12,042 1,252,329 1,264,371 Consumer real estate 1,623 1,255 2,878 130,072 132,950 Total real estate loans 4,217 11,550 15,767 1,709,231 1,724,998 Other loans: Commercial and industrial 159 4,426 4,585 1,026,044 1,030,629 Consumer 564 322 886 17,751 18,637 Total other loans 723 4,748 5,471 1,043,795 1,049,266 Total loans $ 4,940 $ 16,298 $ 21,238 $ 2,753,026 $ 2,774,264
Summary of Information Pertaining to Impaired Loans	The following is a summary of information pertaining to impaired loans excluding loans acquired with deteriorated credit quality, as of the periods indicated (in thousands): September 30, 2015 Recorded Investment Contractual Balance Related Allowance With no related allowance recorded: Construction $ 711 $ 711 $ — Commercial real estate 1,948 2,168 — Consumer real estate 2,324 2,402 — Commercial and industrial 332 336 — Consumer 71 72 — Total $ 5,386 $ 5,689 $ — With an allowance recorded: Construction $ 43 $ 48 $ 6 Commercial real estate 11,105 11,336 4,024 Consumer real estate 734 746 324 Commercial and industrial 19,878 20,186 9,070 Consumer — — — Total $ 31,760 $ 32,316 $ 13,424 Total impaired loans: Construction $ 754 $ 759 $ 6 Commercial real estate 13,053 13,504 4,024 Consumer real estate 3,058 3,148 324 Commercial and industrial 20,210 20,522 9,070 Consumer 71 72 — Total $ 37,146 $ 38,005 $ 13,424 December 31, 2014 Recorded Investment Contractual Balance Related Allowance With no related allowance recorded: Construction $ 927 $ 927 $ — Commercial real estate 7,175 7,453 — Consumer real estate 2,085 2,097 — Commercial and industrial 436 498 — Consumer 256 256 — Total $ 10,879 $ 11,231 $ — With an allowance recorded: Construction $ — $ — $ — Commercial real estate 5,955 6,235 3,138 Consumer real estate — — — Commercial and industrial 14,721 14,774 5,889 Consumer 3 3 1 Total $ 20,679 $ 21,012 $ 9,028 Total impaired loans: Construction $ 927 $ 927 $ — Commercial real estate 13,130 13,688 3,138 Consumer real estate 2,085 2,097 — Commercial and industrial 15,157 15,272 5,889 Consumer 259 259 1 Total $ 31,558 $ 32,243 $ 9,028 For the Three Months Ended September 30, 2015 September 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction $ 783 $ — $ 488 $ 9 Commercial real estate 1,915 — 6,891 7 Consumer real estate 2,467 8 1,672 1 Commercial and industrial 336 1 642 — Consumer 71 1 — — Total $ 5,572 $ 10 $ 9,693 $ 17 With an allowance recorded: Construction $ 43 $ — $ 156 $ — Commercial real estate 11,272 — 6,142 3 Consumer real estate 662 6 677 3 Commercial and industrial 18,635 346 4,335 4 Consumer — — 3 — Total $ 30,612 $ 352 $ 11,313 $ 10 Total impaired loans: Construction $ 826 $ — $ 644 $ 9 Commercial real estate 13,187 — 13,033 10 Consumer real estate 3,129 14 2,349 4 Commercial and industrial 18,971 347 4,977 4 Consumer 71 1 3 — Total $ 36,184 $ 362 $ 21,006 $ 27 For the Nine Months Ended September 30, 2015 September 30, 2014 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction $ 819 $ 18 $ 464 $ 37 Commercial real estate 4,562 14 6,164 123 Consumer real estate 2,205 11 1,668 1 Commercial and industrial 384 1 800 16 Consumer 164 1 — — Total $ 8,134 $ 45 $ 9,096 $ 177 With an allowance recorded: Construction $ 22 $ — $ 155 $ 1 Commercial real estate 8,527 60 5,713 6 Consumer real estate 370 6 861 13 Commercial and industrial 17,300 350 4,021 4 Consumer 2 — 2 — Total $ 26,221 $ 416 $ 10,752 $ 24 Total impaired loans: Construction $ 841 $ 18 $ 619 $ 38 Commercial real estate 13,089 74 11,877 129 Consumer real estate 2,575 17 2,529 14 Commercial and industrial 17,684 351 4,821 20 Consumer 166 1 2 — Total $ 34,355 $ 461 $ 19,848 $ 201
Summary of Nonaccrual Loans	The following is a summary of information pertaining to nonaccrual loans as of the periods indicated (in thousands): September 30, 2015 December 31, 2014 Nonaccrual loans: Construction $ 1,070 $ 792 Commercial real estate 11,276 12,146 Consumer real estate 2,978 1,919 Commercial and industrial 20,175 6,051 Consumer 154 320 Total $ 35,653 $ 21,228
Changes in Carrying Amount of Accretable Yield for Purchased Credit Impaired Loans Acquired	The following is a summary of changes in the accretable yields of acquired loans as of the periods indicated (in thousands): September 30, 2015 September 30, 2014 Balance, beginning of period $ 115 $ 170 Acquisition — — Net transfers from nonaccretable difference to accretable yield — 816 Accretion (86 ) (832 ) Balance, end of period $ 29 $ 154
Summary of Company's Troubled Debt Restructurings ("TDRs')	Information about the Company’s troubled debt restructurings (TDRs) at September 30, 2015 and September 30, 2014 is presented in the following tables (in thousands): Current Greater Than 30 Days Past Due Nonaccrual TDRs Total TDRs As of September 30, 2015 Real estate loans: Construction $ 2 $ — $ 43 $ 45 Commercial real estate 2,227 — — 2,227 Consumer real estate 587 — 131 718 Total real estate loans 2,816 — 174 2,990 Other loans: Commercial and industrial 477 — 12,058 12,535 Total loans $ 3,293 $ — $ 12,232 $ 15,525 Current Greater Than 30 Days Past Due Nonaccrual TDRs Total TDRs As of September 30, 2014 Real estate loans: Construction $ 237 $ — $ — $ 237 Commercial real estate 349 — 103 452 Consumer real estate 610 — 139 749 Total real estate loans 1,196 — 242 1,438 Other loans: Commercial and industrial 291 — — 291 Total loans $ 1,487 $ — $ 242 $ 1,729
Summary of Information Pertaining to Modified Terms of Loans	A summary of information pertaining to modified terms of loans, as of the dates indicated, is as follows: As of September 30, 2015 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Troubled debt restructuring: Construction 2 $ 45 $ 45 Commercial real estate 2 2,227 2,227 Consumer real estate 3 718 718 Commercial and industrial 3 12,535 12,535 10 $ 15,525 $ 15,525 As of September 30, 2014 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Troubled debt restructuring: Construction 4 $ 237 $ 237 Commercial real estate 1 452 452 Consumer real estate 2 749 749 Commercial and industrial 1 291 291 8 $ 1,729 $ 1,729

Goodwill and Other Acquired I31

Goodwill and Other Acquired Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Changes to the carrying amount of goodwill for the nine months ended September 30, 2015 and the year ended December 31, 2014 are provided in the following table (in thousands): Balance at December 31, 2013 $ 4,808 Goodwill acquired during the year — Balance at December 31, 2014 4,808 Goodwill acquired during the year 1,192 Balance at September 30, 2015 $ 6,000
Finite-lived Intangible Assets Amortization Expense	Definite-lived intangible assets had the following carrying values as of the periods indicated (in thousands): September 30, 2015 December 31, 2014 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Core deposit intangibles $ 4,588 $ 1,772 $ 2,816 $ 4,400 $ 1,485 $ 2,915 Other intangible assets $ 133 $ 7 $ 126 $ 106 $ — $ 106 Total definite-lived intangible assets $ 4,721 $ 1,779 $ 2,942 $ 4,506 $ 1,485 $ 3,021

Investments in Tax Credit Ent32

Investments in Tax Credit Entities (Tables)	9 Months Ended
	Sep. 30, 2015
Investments, All Other Investments [Abstract]
Investment Holdings, Schedule of Investments	The tables below set forth the Company's investment in Federal NMTC, State NMTC, Federal Low-Income Housing, Federal Historic Rehabilitation, and State Historic Rehabilitation tax credits, along with the credits expected to be generated through its participation in these programs as of September 30, 2015 and December 31, 2014 (in thousands). The amounts as of September 30, 2015 reflect the cumulative effect of the errors in the accounting for certain of its investments in tax credit entities and the net impact of the reversal of previously recorded amortization under the cost method and the net effect of the equity method and impairment charges. September 30, 2015 Investment Total Impairment(1) Loans to Investment Funds(2) Elimination(3) Net Investment Tax Benefits Recognized Through December 31, 2014 Tax Benefits Expected to be Recognized in 2015 Tax Benefits Expected to be Recognized in 2016, and Thereafter Total Tax Benefits Expected to be Recognized NMTC: Federal: Bank Owned CDEs $ 157,991 $ (6,779 ) $ — $ (118,000 ) $ 33,212 $ 16,490 $ 6,580 $ 22,949 $ 46,019 Non-Bank Owned CDEs 170,839 (21,544 ) (127,520 ) — 21,775 36,580 9,769 20,076 66,425 State 28,227 — — — 28,227 — — — — Total NMTC 357,057 (28,323 ) (127,520 ) (118,000 ) 83,214 53,070 16,349 43,025 112,444 Low-Income Housing 36,162 (7,631 ) — — 28,531 13,188 4,015 38,093 55,296 Historic Rehabilitation: Federal(4) 58,561 (5,805 ) — — 52,756 37,144 41,602 — 78,746 State 7,957 (199 ) — — 7,758 — — — — Total Historic Rehabilitation 66,518 (6,004 ) — — 60,514 37,144 41,602 — 78,746 Total $ 459,737 $ (41,958 ) $ (127,520 ) $ (118,000 ) $ 172,259 $ 103,402 $ 61,966 $ 81,118 $ 246,486 (1) Amount represents the net impact of the reversal of previously recorded amortization under the cost method, as described in Note 1 net of the effect of the application of the equity method and impairment charges. (2) Interest-only loans made to the investment fund during the compliance period for Federal NMTC. (3) Through September 30, 2015 , FNBC CDE received allocations of Federal NMTC from the CDFI Fund of the U.S. Treasury totaling $118.0 million over a three year period beginning in 2011. These investments are eliminated upon consolidation by the Company. (4) As of September 30, 2015 , the Company had $10.5 million invested in Federal Historic Rehabilitation tax credit projects which the Company expects to generate Federal Historic Rehabilitation tax credits in 2015 and 2016 when the projects are completed, receive the certificates of occupancy, and the property is placed into service. The amount of tax credits to be received will be determined when the costs are certified. December 31, 2014 Investment Total Impairment(1) Loans to Investment Funds(2) Elimination(3) Net Investment Tax Benefits Recognized Through December 31, 2013 Tax Benefits Recognized in 2014 Tax Benefits Expected to be Recognized in 2015, and Thereafter Total Tax Benefits Expected to be Recognized NMTC: Federal: Bank Owned CDEs $ 123,700 $ — $ — $ (118,000 ) $ 5,700 $ 10,375 $ 6,115 $ 29,530 $ 46,020 Non-Bank Owned CDEs 162,192 (15,852 ) (120,540 ) — 25,800 27,213 9,367 25,945 62,525 State 28,227 — — — 28,227 — — — — Total NMTC 314,119 (15,852 ) (120,540 ) (118,000 ) 59,727 37,588 15,482 55,475 108,545 Low-Income Housing 43,733 (7,264 ) — — 36,469 9,546 3,642 42,109 55,297 Historic Rehabilitation: Federal(4) 41,794 (3,412 ) — — 38,382 17,823 19,321 37,295 74,439 State 6,335 — — — 6,335 — — — — Total Historic Rehabilitation 48,129 (3,412 ) — — 44,717 17,823 19,321 37,295 74,439 Total $ 405,981 $ (26,528 ) $ (120,540 ) $ (118,000 ) $ 140,913 $ 64,957 $ 38,445 $ 134,879 $ 238,281 (1) Amount represents impairment recorded from the date of original investment through the current period, as evaluated by the Company at the end of each reporting period. (2) Interest-only loans made to the investment fund during the compliance period for Federal NMTC. (3) Through December 31, 2014 , FNBC CDE received allocations of Federal NMTC from the CDFI Fund of the U.S. Treasury totaling $118.0 million over a three year period beginning in 2011. These investments are eliminated upon consolidation by the Company. (4) As of December 31, 2014 , the Company had $12.6 million invested in Federal Historic Rehabilitation tax credit projects which the Company expects to generate Federal Historic Rehabilitation tax credits in 2015 and 2016 when the projects are completed, receive the certificate of occupancy, and the property is placed in service. The amount of tax credits to be received will be determined when the costs are certified.
Schedule of Amortization of Credit Investments	The impairment of tax credit investments for the three and nine month periods ended September 30, 2015 reflect the net impact of the cumulative errors in accounting for certain of its investments in tax credit entities and the net impact of the reversal of previously recorded amortization under the cost method and the net effect of the appropriate recording of the equity method and impairment charges were as follows (in thousands) : For the Three Months Ended September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Federal NMTC $ 1,114 $ 2,972 $ 7,793 $ 7,332 Low-Income Housing 606 541 367 1,624 Federal and State Historic Rehabilitation 1,533 461 2,592 1,222 Total impairment $ 3,253 $ 3,974 $ 10,752 $ 10,178
Summary Of Basis Reduction Recorded Related To Investments In Tax Credit Entities	The amount of basis reduction recorded related to the Company's investment in tax credit entities for the three and nine month periods ended September 30, 2015 and September 30, 2014 were as follows (in thousands): For the Three Months Ended September 30, For the Nine Months Ended September 30, 2015 2014 2015 2014 Federal NMTC $ 368 $ 350 $ 1,104 $ 1,051 Federal Historic Rehabilitation 138 984 415 1,693 Total basis reduction $ 506 $ 1,334 $ 1,519 $ 2,744
Summary of Major Classifications of Loans	Major classifications of loans at September 30, 2015 and December 31, 2014 were as follows (in thousands): September 30, 2015 December 31, 2014 Commercial real estate loans: Construction $ 451,713 $ 316,492 Mortgage(1) 1,301,897 1,252,225 1,753,610 1,568,717 Consumer real estate loans: Construction 8,676 10,393 Mortgage 153,520 131,031 162,196 141,424 Commercial and industrial loans 1,133,114 1,016,414 Loans to individuals, excluding real estate 20,681 18,316 Nonaccrual loans 35,653 21,228 Other loans 13,600 8,165 3,118,854 2,774,264 Less allowance for loan losses (53,076 ) (42,336 ) Loans, net $ 3,065,778 $ 2,731,928 (1) Included in commercial real estate loans, mortgage, are owner-occupied real estate loans of $421.2 million at September 30, 2015 and $419.3 million at December 31, 2014 . These loans were classified in the Company's loan portfolio at September 30, 2015 and December 31, 2014 as follows (in thousands): September 30, 2015 December 31, 2014 Construction $ 45,353 $ 80,741 Commercial real estate 71,305 67,520 Commercial and industrial 137,555 117,191 Total loans $ 254,213 $ 265,452

Long-term Borrowings (Tables)

Long-term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Borrowings	The following table includes a summary of long-term borrowings as of September 30, 2015 and December 31, 2014 (in thousands): September 30, 2015 December 31, 2014 FNBB $ 3,392 $ — Credit Suisse Securities (USA) LLC 40,000 40,000 5.75% Subordinated Notes due 2025 60,000 — Total long-term borrowings $ 103,392 $ 40,000

Derivative - Interest Rate Sw34

Derivative - Interest Rate Swap Agreements (Tables)	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	Information pertaining to outstanding derivative instruments is as follows (in thousands): Derivative Assets Fair Value Derivative Liabilities Fair Value Balance Sheet Location September 30, 2015 December 31, 2014 Balance Sheet Location September 30, 2015 December 31, 2014 Derivatives designated as hedging instruments under ASC Topic 815: Interest rate swaps - Counterparty B Other Assets $ — $ — Other Liabilities $ 22,100 $ 15,995 Interest rate-prime swaps - Counterparty B Other Assets 4,687 3,042 Other Liabilities — — Interest rate swaps - Counterparty C Other Assets 1,599 37 Other Liabilities — — Interest rate-prime swaps - Counterparty C Other Assets — — Other Liabilities 3,516 — $ 6,286 $ 3,079 $ 25,616 $ 15,995
Schedule of Derivative Assets Subject to Master Netting Arrangements	The Company entered into master netting arrangements with both Counterparty B and Counterparty C whereby the delayed interest rate swaps and hedges would be settled net. Net fair values of the Counterparty B and Counterparty C delayed interest rate swaps and hedges as of September 30, 2015 and December 31, 2014 were as follows (in thousands): September 30, 2015 Gross Amounts Presented in the Balance Sheet Gross Amounts Not Offset in the Balance Sheet Derivatives Collateral Net Derivatives subject to master netting arrangements: Derivative liabilities: Counterparty B $ 17,413 $ — $ — $ 17,413 Counterparty C 1,917 — — 1,917 Net derivative liability $ 19,330 $ — $ — $ 19,330 December 31, 2014 Gross Amounts Presented in the Balance Sheet Gross Amounts Not Offset in the Balance Sheet Derivatives Collateral Net Derivatives subject to master netting arrangements: Derivative liabilities: Counterparty B $ 12,953 $ — $ — $ 12,953 Net derivative liability $ 12,953 $ — $ — $ 12,953
Schedule of Derivative Liabilities Subject to Master Netting Arrangements	The Company entered into master netting arrangements with both Counterparty B and Counterparty C whereby the delayed interest rate swaps and hedges would be settled net. Net fair values of the Counterparty B and Counterparty C delayed interest rate swaps and hedges as of September 30, 2015 and December 31, 2014 were as follows (in thousands): September 30, 2015 Gross Amounts Presented in the Balance Sheet Gross Amounts Not Offset in the Balance Sheet Derivatives Collateral Net Derivatives subject to master netting arrangements: Derivative liabilities: Counterparty B $ 17,413 $ — $ — $ 17,413 Counterparty C 1,917 — — 1,917 Net derivative liability $ 19,330 $ — $ — $ 19,330 December 31, 2014 Gross Amounts Presented in the Balance Sheet Gross Amounts Not Offset in the Balance Sheet Derivatives Collateral Net Derivatives subject to master netting arrangements: Derivative liabilities: Counterparty B $ 12,953 $ — $ — $ 12,953 Net derivative liability $ 12,953 $ — $ — $ 12,953
Schedule of Effect of Hedging Instruments	At September 30, 2015 and 2014 , and for the nine months then ended, information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows (in thousands): Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion) As of September 30, Derivatives in ASC Topic 815 Cash Flow Hedging Relationships: 2015 2014 Interest rate swap with Counterparty A $ (4,663 ) $ (2,408 ) Interest rate swap and prime swaps with Counterparty B (10,472 ) (6,477 ) Interest rate swap and prime swaps with Counterparty C (1,247 ) $ — Total $ (16,382 ) $ (8,885 )

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Summary of Income Tax Benefit on Statement of Income	The income tax benefit on the statement of income for the nine months ended September 30, 2015 and 2014 was as follows (in thousands): September 30, 2015 September 30, 2014 Current tax expense $ 2,149 $ — Deferred tax benefit (44,379 ) (16,354 ) Total tax benefit $ (42,230 ) $ (16,354 )

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Summary of Total Notional Amount of Loan Commitments and Standby Letters of Credit	The following is a summary of the total notional amount of loan commitments and standby letters of credit outstanding at September 30, 2015 and December 31, 2014 (in thousands): September 30, 2015 December 31, 2014 Standby letters of credit $ 98,688 $ 110,636 Unused loan commitments 754,618 509,665 Total $ 853,306 $ 620,301

Accumulated Other Comprehensi37

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Summary of Changes in Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive income (loss) and changes in those components are presented in the following table (in thousands): Cash Flow Hedges(1) Terminated Cash Flow Hedges(2) Transfers of Available for Sale Securities to Held to Maturity Available for Sale Securities Total Balance at January 1, 2015 $ (8,396 ) $ (5,194 ) $ (3,354 ) $ (2,793 ) $ (19,737 ) Other comprehensive income (loss) before income taxes: Net change in unrealized gain (loss) (6,414 ) 1,326 — 4,094 (994 ) Reclassification of net losses realized and included in earnings — 792 — — 792 Amortization of unrealized net gain — — 501 — 501 Income tax expense (benefit) (2,245 ) 741 176 1,433 105 Balance at September 30, 2015 $ (12,565 ) $ (3,817 ) $ (3,029 ) $ (132 ) $ (19,543 ) Cash Flow Hedges(1) Transfers of Available for Sale Securities to Held to Maturity Available for Sale Securities Total Balance at January 1, 2014 $ (2,054 ) $ (3,710 ) $ (10,751 ) $ (16,515 ) Other comprehensive income (loss) before income taxes: Net change in unrealized gain (loss) (10,509 ) — 10,164 (345 ) Reclassification of net gains realized and included in earnings — — (135 ) (135 ) Amortization of unrealized net gain — 386 — 386 Income tax expense (benefit) (3,678 ) 135 3,511 (32 ) Balance at September 30, 2014 $ (8,885 ) $ (3,459 ) $ (4,233 ) $ (16,577 ) (1) Balances in the Cash Flow Hedges column represent the net operating changes in all of the Company's cash flow hedge relationships as of the dates stated. (2) Balances in the Terminated Cash Flow Hedges column represent the net unrealized loss at termination of a certain interest rate swap cash flow hedge relationship and the net unrealized gains at termination of certain interest rate-prime swap cash flow hedge relationships. See Note 10 for further explanation on the terminated cash flow hedges.

Capital Requirements and Othe38

Capital Requirements and Other Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2015
Banking and Thrift [Abstract]
Summary of Capital Amounts and Ratios	The following tables present the actual capital amounts and regulatory capital ratios for the Company and the Bank as of September 30, 2015 and December 31, 2014 : September 30, 2015 "Well Capitalized" Minimums Actual (in thousands) Ratio Amount First NBC Bank Holding Company Tier 1 leverage capital 9.53 % $ 395,680 Tier 1 risk-based capital 10.47 % 395,680 Total risk-based capital 13.33 % 503,785 Common equity tier 1 risk-based capital 10.47 % 395,680 First NBC Bank Tier 1 leverage capital 5.00 % 10.23 % $ 424,150 Tier 1 risk-based capital 8.00 % 11.24 % 424,150 Total risk-based capital 10.00 % 12.51 % 472,195 Common equity tier 1 risk-based capital 6.50 % 11.24 % 424,150 December 31, 2014 "Well Capitalized" Minimums Actual (in thousands) Ratio Amount First NBC Bank Holding Company Tier 1 leverage capital 10.66 % $ 387,224 Tier 1 risk-based capital 11.59 % 387,224 Total risk-based capital 12.84 % 428,962 Common equity tier 1 risk-based capital NA NA First NBC Bank Tier 1 leverage capital 5.00 % 9.95 % $ 361,078 Tier 1 risk-based capital 6.00 % 10.82 % 361,078 Total risk-based capital 10.00 % 12.07 % 402,816 Common equity tier 1 risk-based capital NA NA NA

Fair Value of Financial Instr39

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Carrying Value and Fair Value Measurements of Financial Assets and Liabilities on Recurring Basis	The Company has segregated all financial assets and liabilities that are measured at fair value on a recurring basis into the most appropriate level within the fair value hierarchy, based on the inputs used to determine the fair value at the measurement date in the tables below (in thousands): September 30, 2015 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Available for sale securities: U.S. government agency securities $ 154,652 $ — $ 154,652 $ — U.S. Treasury securities 12,886 — 12,886 — Municipal securities 12,219 — 12,219 — Mortgage-backed securities 54,997 — 54,997 — Corporate bonds 7,989 — 7,989 — Other equity securities 22 22 — — Other debt securities 30,937 — 30,937 — Total $ 273,702 $ 22 $ 273,680 $ — Liabilities Derivative instruments $ 19,330 $ — $ 19,330 $ — December 31, 2014 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Available for sale securities: U.S. government agency securities $ 157,527 $ — $ 157,527 $ — U.S. Treasury securities 12,610 — 12,610 — Municipal securities 12,246 — 12,246 — Mortgage-backed securities 57,087 — 57,087 — Corporate bonds 8,177 — 8,177 — $ 247,647 $ — $ 247,647 $ — Derivative instruments 37 — 37 — Total $ 247,684 $ — $ 247,684 $ — Liabilities Derivative instruments $ 12,953 $ — $ 12,953 $ —
Carrying Value and Fair Value Measurements of Financial Assets and Liabilities on Non Recurring Basis	The Company has segregated all financial assets and liabilities that are measured at fair value on a nonrecurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date in the tables below (in thousands): September 30, 2015 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Loans $ 31,760 $ — $ — $ 31,760 Other real estate owned 2,864 — — 2,864 $ 34,624 $ — $ — $ 34,624 December 31, 2014 Fair Value Measurement Using Total Quoted Prices in Active Markets for Identical Assets ( Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Loans $ 20,679 $ — $ — $ 20,679 Other real estate owned 3,022 — — 3,022 $ 23,701 $ — $ — $ 23,701
Carrying Value and Fair Value Measurements of Financial Instruments	The estimated fair values of the Company’s financial instruments were as follows as of the dates indicated (in thousands): Fair Value Measurements at September 30, 2015 Carrying Amount Total Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 33,759 $ 33,759 $ 33,759 $ — $ — Short-term investments 179,526 179,526 179,526 — — Investment in short-term receivables 182,945 182,945 182,945 — — Investment securities available for sale 273,702 273,702 22 273,680 — Investment securities held to maturity 83,319 84,601 — 84,601 — Loans and loans held for sale 3,121,501 3,103,534 — — 3,103,534 Cash surrender value of bank-owned life insurance 48,342 48,342 48,342 — — Financial Liabilities: Deposits, noninterest-bearing 416,405 416,405 — 416,405 — Deposits, interest-bearing 3,200,513 3,162,486 — — 3,162,486 Repurchase agreements 93,775 93,775 — 93,775 — Long-term borrowings 103,392 106,591 — — 106,591 Derivative instruments 19,330 19,330 — 19,330 — Fair Value Measurements at December 31, 2014 Carrying Amount Total Level 1 Level 2 Level 3 Financial Assets: Cash and due from banks $ 32,484 $ 32,484 $ 32,484 $ — $ — Short-term investments 18,404 18,404 18,404 — — Investment in short-term receivables 237,135 237,135 237,135 — — Investment securities available for sale 247,647 247,647 — 247,647 — Investment securities held to maturity 89,076 90,956 — 90,956 — Loans and loans held for sale 2,775,886 3,003,280 — — 3,003,280 Cash surrender value of bank-owned life insurance 47,289 47,289 47,289 — — Derivative instruments 37 37 — 37 — Financial Liabilities: Deposits, noninterest-bearing 364,534 364,534 — 364,534 — Deposits, interest-bearing 2,756,316 2,722,134 — — 2,722,134 Repurchase agreements 117,991 117,991 — 117,991 — Long-term borrowings 40,000 42,270 — — 42,270 Derivative instruments 12,953 12,953 — 12,953 —

Basis of Presentation (Details)

Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Net of tax	$ 3,253		$ 3,974		$ 10,752	$ 10,178
Net income impact of error corrections, Net of tax	$ 18,201		$ 14,359		$ 51,461	$ 39,886
Basic earnings per share, Net of tax (in usd per share)	$ 0.97		$ 0.75		$ 2.72	$ 2.10
Tax credit carryforward period (years)					20 years
Tax credit as Percentage of project cost					39.00%
Minimum
Accounting Changes and Error Corrections [Abstract]
Interest at the end of compliance period (as a percent)					5.00%
Maximum
Accounting Changes and Error Corrections [Abstract]
Interest at the end of compliance period (as a percent)					25.00%
Low-Income Housing Credits
Accounting Changes and Error Corrections [Abstract]
Non voting interest (as a percent)					99.99%
Compliance period (years)					15 years
Interest percentage for general partners	0.01%				0.01%
Low-Income Housing Credits | Minimum
Accounting Changes and Error Corrections [Abstract]
Federal Tax Credit, Adjustment Period (years)					10 years
Low-Income Housing Credits | Maximum
Accounting Changes and Error Corrections [Abstract]
Federal Tax Credit, Adjustment Period (years)					15 years
Federal and State Historic Rehabilitation
Accounting Changes and Error Corrections [Abstract]
Non voting interest (as a percent)					99.00%
Compliance period (years)					5 years
Interest percentage for general partners	1.00%				1.00%
Federal NMTC
Accounting Changes and Error Corrections [Abstract]
Compliance period (years)					7 years
CDE fee (as a percent)					4.00%
Annual fee (as a percent)					0.50%
Federal NMTC | Minimum
Accounting Changes and Error Corrections [Abstract]
Federal Tax Credit, Adjustment Period (years)					7 years
First Three Years
Accounting Changes and Error Corrections [Abstract]
Tax credit as Percentage of project cost					5.00%
Next Four Years
Accounting Changes and Error Corrections [Abstract]
Tax credit as Percentage of project cost					6.00%
Low-Income Housing Credits
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Net of tax	$ 606		$ 541		$ 367	$ 1,624
Federal and State Historic Rehabilitation
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Net of tax	1,533		461		2,592	1,222
Federal NMTC
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Net of tax	1,114		$ 2,972		7,793	$ 7,332
Investment Accounting Adjustment Under Equity Method
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Pre-Tax	2,397	$ (76)		$ 5	3,328
Total investment in tax credit entities impairment, Net of tax	1,559	(49)		3	2,163
Net income impact of error corrections, Pre-Tax	1,787	(1,105)		(1,176)	1,537
Net income impact of error corrections, Net of tax	$ 1,162	$ (718)		$ (765)	$ 999
Basic earnings per share, Pre-Tax (in usd per share)	$ 0.10	$ (0.06)		$ (0.06)	$ 0.08
Basic earnings per share, Net of tax (in usd per share)	$ 0.06	$ (0.04)		$ (0.04)	$ 0.05
Investment Accounting Adjustment Under Equity Method | Low-Income Housing Credits
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Pre-Tax	$ 7	$ (253)		$ (353)	$ (346)
Total investment in tax credit entities impairment, Net of tax	5	(164)		(229)	(225)
Low-Income Housing investment VIE Consolidation loss, Pre-Tax	(610)	(1,029)		(1,181)	(1,791)
Low-Income Housing investment VIE consolidation loss, Net of tax	(397)	(669)		(768)	(1,164)
Investment Accounting Adjustment Under Equity Method | Federal and State Historic Rehabilitation
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Pre-Tax	(199)	177		358	358
Total investment in tax credit entities impairment, Net of tax	(129)	$ 115		$ 232	233
Investment Accounting Adjustment Under Equity Method | Federal NMTC
Accounting Changes and Error Corrections [Abstract]
Total investment in tax credit entities impairment, Pre-Tax	2,589				3,316
Total investment in tax credit entities impairment, Net of tax	$ 1,683				$ 2,155

Acquisitions (Details)

Acquisitions (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2015USD ($)	Jan. 16, 2015USD ($)facility
Business Combinations [Abstract]
Number of banking facilities acquired | facility			3
Initial settlement amount			$ 10,100
Assets
Cash and due from banks	$ 1,511	$ 1,511	1,511
Short-term investments	19,971	19,971	19,971
Investment securities-available for sale	9,559	9,559	9,559
Loans	26,444	26,444	27,647
Bank premises	3,120	3,120	3,120
Core deposit intangible	188	188	0
Other assets	455	455	455
Total Assets	61,248	61,248	62,263
Deposits:
Non-interest bearing	22,680	22,680	22,680
Interest bearing	49,600	49,600	49,584
Total deposits	72,280	72,280	72,264
Other liabilities	34	34	34
Total Liabilities	72,314	$ 72,314	$ 72,298
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Cash and due from banks	0
Short-term investments	0
Investment securities-available for sale	0
Loans	(1,203)
Bank premises	0
Core deposit intangible	188
Other assets	0
Total Assets	(1,015)
Non-interest bearing deposits	0
Interest bearing deposits	16
Total deposits	16
Other liabilities	0
Total Liabilities	$ 16
Amortization period for fair value adjustment of interest bearing deposit liabilities (in months)		49 months

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Computation of Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Basic: Income available to common shareholders	$ 18,106	$ 13,989	$ 50,874	$ 38,837
Weighted-average common shares outstanding	18,630	18,556	18,737	18,530
Basic earnings per share (in usd per share)	$ 0.97	$ 0.75	$ 2.72	$ 2.10
Diluted: Income available to common shareholders	$ 18,106	$ 13,989	$ 50,874	$ 38,837
Weighted-average common shares outstanding	18,630	18,556	18,737	18,530
Effect of dilutive securities:
Stock options outstanding (in shares)	420	381	407	382
Restricted shares outstanding (in shares)	6	0	3	0
Warrants (in shares)	115	117	119	118
Weighted-average common shares outstanding – assuming dilution	19,171	19,054	19,266	19,030
Diluted earnings per share (in usd per share)	$ 0.94	$ 0.73	$ 2.64	$ 2.04

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Market Values of Investment Securities with Gross Unrealized Gains and Losses (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available for sale:
Amortized Cost	$ 273,907	$ 251,943
Gross Unrealized Gains	1,674	1,633
Gross Unrealized Losses Less Than One Year	(860)	(173)
Gross Unrealized Losses Greater Than One Year	(1,019)	(5,756)
Estimated Market Value	273,702	247,647
Held to maturity:
Amortized Cost	83,319	89,076
Gross Unrealized Gains	2,580	3,280
Gross Unrealized Losses Less Than One Year	(1,130)	(270)
Gross Unrealized Losses Greater Than One Year	(168)	(1,130)
Estimated Market Value	84,601	90,956
U.S. government agency securities
Available for sale:
Amortized Cost	154,786	161,461
Gross Unrealized Gains	943	891
Gross Unrealized Losses Less Than One Year	(267)	0
Gross Unrealized Losses Greater Than One Year	(810)	(4,825)
Estimated Market Value	154,652	157,527
U.S. Treasury securities
Available for sale:
Amortized Cost	13,016	13,019
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less Than One Year	0	0
Gross Unrealized Losses Greater Than One Year	(130)	(409)
Estimated Market Value	12,886	12,610
Municipal securities
Available for sale:
Amortized Cost	12,130	12,175
Gross Unrealized Gains	163	107
Gross Unrealized Losses Less Than One Year	0	(36)
Gross Unrealized Losses Greater Than One Year	(74)	0
Estimated Market Value	12,219	12,246
Held to maturity:
Amortized Cost	38,989	41,255
Gross Unrealized Gains	1,997	2,182
Gross Unrealized Losses Less Than One Year	0	(62)
Gross Unrealized Losses Greater Than One Year	(9)	0
Estimated Market Value	40,977	43,375
Mortgage-backed securities
Available for sale:
Amortized Cost	54,863	57,025
Gross Unrealized Gains	568	635
Gross Unrealized Losses Less Than One Year	(429)	(137)
Gross Unrealized Losses Greater Than One Year	(5)	(436)
Estimated Market Value	54,997	57,087
Held to maturity:
Amortized Cost	44,330	47,821
Gross Unrealized Gains	583	1,098
Gross Unrealized Losses Less Than One Year	(1,130)	(208)
Gross Unrealized Losses Greater Than One Year	(159)	(1,130)
Estimated Market Value	43,624	47,581
Corporate bonds
Available for sale:
Amortized Cost	8,144	8,263
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less Than One Year	(155)	0
Gross Unrealized Losses Greater Than One Year	0	(86)
Estimated Market Value	7,989	$ 8,177
Other equity securities
Available for sale:
Amortized Cost	22
Gross Unrealized Gains	0
Gross Unrealized Losses Less Than One Year	0
Gross Unrealized Losses Greater Than One Year	0
Estimated Market Value	22
Other debt securities
Available for sale:
Amortized Cost	30,946
Gross Unrealized Gains	0
Gross Unrealized Losses Less Than One Year	(9)
Gross Unrealized Losses Greater Than One Year	0
Estimated Market Value	$ 30,937

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015USD ($)security	Sep. 30, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2014USD ($)security
Investments, Debt and Equity Securities [Abstract]
Transfer of securities with fair value			$ 95.4
Accumulated other comprehensive income (loss) included net pre-tax unrealized losses	$ (4.7)		$ (5.9)
Number of securities in loss position | security	50			38
Securities with estimated market values	$ 277.9			$ 279.1
Proceeds from sale of securities	$ 0	$ 44.5
Gross Realized Gains		0.8
Gross Realized Losses		$ 0.7

Investment Securities - Summa45

Investment Securities - Summary of Amortized Cost and Estimated Market Values by Contractual Maturity of Investment Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available for sale:
Weighted average yield, Due in one year or less	1.34%	1.78%
Weighted average yield, Due after one year through five years	2.19%	2.64%
Weighted average yield, Due after five years through ten years	2.00%	2.02%
Weighted average yield, Due after ten years	3.25%	3.34%
Weighted average yield, Total securities	2.01%	2.27%
Amortized Cost, Due in one year or less	$ 48,124	$ 571
Amortized Cost, Due after one year through five years	67,484	51,037
Amortized Cost, Due after five years through ten years	135,643	176,631
Amortized Cost, Due after ten years	22,656	23,704
Amortized Cost	273,907	251,943
Estimated Market Value, Due in one year or less	48,300	573
Estimated Market Value, Due after one year through five years	68,208	51,916
Estimated Market Value, Due after five years through ten years	135,130	172,012
Estimated Market Value, Due after ten years	22,064	23,146
Estimated Market Value	$ 273,702	$ 247,647
Held to maturity:
Weighted average yield, Due in one year or less	10.63%	3.88%
Weighted average yield, Due after one year through five years	3.98%	4.16%
Weighted average yield, Due after five years through ten years	3.81%	3.39%
Weighted average yield, Due after ten years	3.31%	3.30%
Weighted average yield, Total securities	4.14%	3.55%
Amortized Cost, Due in one year or less	$ 4,469	$ 2,045
Amortized Cost, Due after one year through five years	37,307	20,921
Amortized Cost, Due after five years through ten years	24,037	32,618
Amortized Cost, Due after ten years	17,506	33,492
Amortized Cost, Total securities	83,319	89,076
Estimated Market Value, Due in one year or less	4,405	2,003
Estimated Market Value, Due after one year through five years	38,289	21,875
Estimated Market Value, Due after five years through ten years	24,670	33,898
Estimated Market Value, Due after ten years	17,237	33,180
Estimated Market Value	$ 84,601	$ 90,956

Loans - Summary of Major Classi

Loans - Summary of Major Classifications of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Commercial real estate loans:
Construction	$ 451,713		$ 316,492
Mortgage	1,301,897		1,252,225
Total commercial real estate loans	1,753,610		1,568,717
Consumer real estate loans:
Construction	8,676		10,393
Mortgage	153,520		131,031
Total consumer real estate loans	162,196		141,424
Commercial and industrial loans	1,133,114		1,016,414
Loans to individuals, excluding real estate	20,681		18,316
Nonaccrual loans	35,653		21,228
Other loans	13,600		8,165
Total Loans	3,118,854		2,774,264
Less allowance for loan losses	(53,076)	$ (50,351)	(42,336)	$ (40,300)	$ (37,403)	$ (32,143)
Loans, net	3,065,778		2,731,928
Owner Occupied Commercial Real Estate Loan	$ 421,200		$ 419,300

Loans - Summary of Changes in A

Loans - Summary of Changes in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 50,351	$ 37,403	$ 42,336	$ 32,143
Provision charged to operations	3,000	3,000	11,600	9,000
Charge-offs	(287)	(137)	(1,192)	(906)
Recoveries	12	34	332	63
Balance, end of period	$ 53,076	$ 40,300	$ 53,076	$ 40,300

Loans - Summary of Allowance fo

Loans - Summary of Allowance for Loan Losses and Recorded Investment in Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 50,351	$ 37,403	$ 42,336	$ 32,143
Charge-offs	(287)	(137)	(1,192)	(906)
Recoveries	12	34	332	63
Provision	3,000	3,000	11,600	9,000
Balance, end of period	53,076	40,300	53,076	40,300
Individually evaluated for impairment	13,424	4,590	13,424	4,590
Collectively evaluated for impairment	39,652	35,710	39,652	35,710
Ending balance-total	3,118,854		3,118,854		$ 2,774,264
Loans receivable
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance-total	3,118,854	2,698,619	3,118,854	2,698,619
Individually evaluated for impairment	37,146	22,574	37,146	22,574
Collectively evaluated for impairment	3,081,708	2,676,045	3,081,708	2,676,045
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period			4,030	2,790
Charge-offs			(12)	(18)
Recoveries			0	0
Provision			2,298	1,325
Balance, end of period	6,316	4,097	6,316	4,097
Individually evaluated for impairment	6	0	6	0
Collectively evaluated for impairment	6,310	4,097	6,310	4,097
Ending balance-total	461,459		461,459		327,677
Construction | Loans receivable
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance-total	461,459	318,145	461,459	318,145
Individually evaluated for impairment	754	927	754	927
Collectively evaluated for impairment	460,705	317,218	460,705	317,218
Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period			14,965	13,780
Charge-offs			(783)	(441)
Recoveries			246	1
Provision			2,996	2,228
Balance, end of period	17,424	15,568	17,424	15,568
Individually evaluated for impairment	4,024	1,471	4,024	1,471
Collectively evaluated for impairment	13,400	14,097	13,400	14,097
Ending balance-total	1,313,173		1,313,173		1,264,371
Commercial Real Estate | Loans receivable
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance-total	1,313,173	1,219,682	1,313,173	1,219,682
Individually evaluated for impairment	13,053	13,942	13,053	13,942
Collectively evaluated for impairment	1,300,120	1,205,740	1,300,120	1,205,740
Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period			3,316	2,656
Charge-offs			(55)	(47)
Recoveries			4	0
Provision			462	347
Balance, end of period	3,727	2,956	3,727	2,956
Individually evaluated for impairment	324	938	324	938
Collectively evaluated for impairment	3,403	2,018	3,403	2,018
Ending balance-total	156,498		156,498		132,950
Consumer Real Estate | Loans receivable
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance-total	156,498	131,027	156,498	131,027
Individually evaluated for impairment	3,058	2,066	3,058	2,066
Collectively evaluated for impairment	153,440	128,961	153,440	128,961
Commercial and Industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period			19,814	12,677
Charge-offs			(289)	(304)
Recoveries			67	46
Provision			5,844	5,011
Balance, end of period	25,436	17,430	25,436	17,430
Individually evaluated for impairment	9,070	2,180	9,070	2,180
Collectively evaluated for impairment	16,366	15,250	16,366	15,250
Ending balance-total	1,166,889		1,166,889		1,030,629
Commercial and Industrial | Loans receivable
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance-total	1,166,889	1,008,174	1,166,889	1,008,174
Individually evaluated for impairment	20,210	5,636	20,210	5,636
Collectively evaluated for impairment	1,146,679	1,002,538	1,146,679	1,002,538
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period			211	240
Charge-offs			(53)	(96)
Recoveries			15	16
Provision			0	89
Balance, end of period	173	249	173	249
Individually evaluated for impairment	0	1	0	1
Collectively evaluated for impairment	173	248	173	248
Ending balance-total	20,835		20,835		$ 18,637
Consumer | Loans receivable
Allowance for Loan and Lease Losses [Roll Forward]
Ending balance-total	20,835	21,591	20,835	21,591
Individually evaluated for impairment	71	3	71	3
Collectively evaluated for impairment	$ 20,764	$ 21,588	$ 20,764	$ 21,588

Loans - Summary of Credit Quali

Loans - Summary of Credit Quality Indicators on Company's Loan Portfolio (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 3,118,854	$ 2,774,264
Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	461,459	327,677
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,313,173	1,264,371
Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	156,498	132,950
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,166,889	1,030,629
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	20,835	18,637
Pass and Pass/Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,926,562	2,682,243
Pass and Pass/Watch | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	446,121	313,987
Pass and Pass/Watch | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,258,670	1,215,673
Pass and Pass/Watch | Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	150,261	128,507
Pass and Pass/Watch | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,050,880	1,005,829
Pass and Pass/Watch | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	20,630	18,247
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	19,389	1,682
Special Mention | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	2
Special Mention | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,334	1,613
Special Mention | Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	56	60
Special Mention | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,995	0
Special Mention | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	4	7
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	157,903	90,339
Substandard | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	15,338	13,688
Substandard | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	42,169	47,085
Substandard | Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,181	4,383
Substandard | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	94,014	24,800
Substandard | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	201	383
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	15,000	0
Doubtful | Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Doubtful | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	15,000	0
Doubtful | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	$ 3,118,854,000	$ 2,774,264,000
Past Due Loans	20,610,000	21,238,000
Average recorded investment in nonaccrual loan	26,700,000	19,600,000
Amount of interest income	1,100,000	1,000,000
TDRs modified and moved to interest rate-only payments	12,100,000		$ 0
Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	157,903,000	90,339,000
Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	19,389,000	1,682,000
Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	15,000,000	0
Receivables Acquired with Deteriorated Credit Quality | Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality	3,200,000	5,400,000
Receivables Acquired with Deteriorated Credit Quality | Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans acquired with deteriorated credit quality		1,600,000
90 Days and Greater Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Past Due Loans	18,121,000	16,298,000
90 Days and Greater Past Due | Secured Tuition Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Past Due Loans	37,000	28,000
Commercial and Industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	1,166,889,000	1,030,629,000
Past Due Loans	5,239,000	4,585,000
Commercial and Industrial | Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	94,014,000	24,800,000
Commercial and Industrial | Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	6,995,000	0
Commercial and Industrial | Doubtful
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans classified as doubtful	15,000,000	0
Commercial and Industrial | 90 Days and Greater Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Past Due Loans	$ 5,172,000	$ 4,426,000

Loans - Age Analysis of Past Du

Loans - Age Analysis of Past Due Loans Including Loans Acquired with Deteriorated Credit Quality (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	$ 20,610	$ 21,238
Current Loans	3,098,244	2,753,026
Total Loans	3,118,854	2,774,264
Total real estate loans
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	14,906	15,767
Current Loans	1,916,224	1,709,231
Total Loans	1,931,130	1,724,998
Total other loans
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	5,704	5,471
Current Loans	1,182,020	1,043,795
Total Loans	1,187,724	1,049,266
Construction
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	1,082	847
Current Loans	460,377	326,830
Total Loans	461,459	327,677
Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	10,884	12,042
Current Loans	1,302,289	1,252,329
Total Loans	1,313,173	1,264,371
Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	2,940	2,878
Current Loans	153,558	130,072
Total Loans	156,498	132,950
Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	5,239	4,585
Current Loans	1,161,650	1,026,044
Total Loans	1,166,889	1,030,629
Consumer
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	465	886
Current Loans	20,370	17,751
Total Loans	20,835	18,637
Greater Than 30 and Fewer Than 90 Days Past Due
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	2,489	4,940
Greater Than 30 and Fewer Than 90 Days Past Due | Total real estate loans
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	2,139	4,217
Greater Than 30 and Fewer Than 90 Days Past Due | Total other loans
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	350	723
Greater Than 30 and Fewer Than 90 Days Past Due | Construction
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	13	97
Greater Than 30 and Fewer Than 90 Days Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	898	2,497
Greater Than 30 and Fewer Than 90 Days Past Due | Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	1,228	1,623
Greater Than 30 and Fewer Than 90 Days Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	67	159
Greater Than 30 and Fewer Than 90 Days Past Due | Consumer
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	283	564
90 Days and Greater Past Due
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	18,121	16,298
90 Days and Greater Past Due | Total real estate loans
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	12,767	11,550
90 Days and Greater Past Due | Total other loans
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	5,354	4,748
90 Days and Greater Past Due | Construction
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	1,069	750
90 Days and Greater Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	9,986	9,545
90 Days and Greater Past Due | Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	1,712	1,255
90 Days and Greater Past Due | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	5,172	4,426
90 Days and Greater Past Due | Consumer
Financing Receivable, Recorded Investment [Line Items]
Past Due Loans	$ 182	$ 322

Loans - Summary of Information

Loans - Summary of Information Pertaining to Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	$ 5,386		$ 5,386		$ 10,879
With no related allowance recorded, Contractual Balance	5,689		5,689		11,231
With no related allowance recorded, Related Allowance	0		0		0
With an allowance recorded, Recorded Investment	31,760		31,760		20,679
With an allowance recorded, Contractual Balance	32,316		32,316		21,012
With an allowance recorded, Related Allowance	13,424		13,424		9,028
Total impaired loans, Recorded Investment	37,146		37,146		31,558
Total impaired loans, Contractual Balance	38,005		38,005		32,243
Total impaired loans, Related Allowance	13,424		13,424		9,028
With no related allowance recorded, Average Recorded Investment	5,572	$ 9,693	8,134	$ 9,096
With no related allowance recorded, Interest Income Recognized	10	17	45	177
With an allowance recorded, Average Recorded Investment	30,612	11,313	26,221	10,752
With an allowance recorded, Interest Income Recognized	352	10	416	24
Total impaired loans, Average Recorded Investment	36,184	21,006	34,355	19,848
Total impaired loans, Interest Income Recognized	362	27	461	201
Construction
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	711		711		927
With no related allowance recorded, Contractual Balance	711		711		927
With no related allowance recorded, Related Allowance	0		0		0
With an allowance recorded, Recorded Investment	43		43		0
With an allowance recorded, Contractual Balance	48		48		0
With an allowance recorded, Related Allowance	6		6		0
Total impaired loans, Recorded Investment	754		754		927
Total impaired loans, Contractual Balance	759		759		927
Total impaired loans, Related Allowance	6		6		0
With no related allowance recorded, Average Recorded Investment	783	488	819	464
With no related allowance recorded, Interest Income Recognized	0	9	18	37
With an allowance recorded, Average Recorded Investment	43	156	22	155
With an allowance recorded, Interest Income Recognized	0	0	0	1
Total impaired loans, Average Recorded Investment	826	644	841	619
Total impaired loans, Interest Income Recognized	0	9	18	38
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	1,948		1,948		7,175
With no related allowance recorded, Contractual Balance	2,168		2,168		7,453
With no related allowance recorded, Related Allowance	0		0		0
With an allowance recorded, Recorded Investment	11,105		11,105		5,955
With an allowance recorded, Contractual Balance	11,336		11,336		6,235
With an allowance recorded, Related Allowance	4,024		4,024		3,138
Total impaired loans, Recorded Investment	13,053		13,053		13,130
Total impaired loans, Contractual Balance	13,504		13,504		13,688
Total impaired loans, Related Allowance	4,024		4,024		3,138
With no related allowance recorded, Average Recorded Investment	1,915	6,891	4,562	6,164
With no related allowance recorded, Interest Income Recognized	0	7	14	123
With an allowance recorded, Average Recorded Investment	11,272	6,142	8,527	5,713
With an allowance recorded, Interest Income Recognized	0	3	60	6
Total impaired loans, Average Recorded Investment	13,187	13,033	13,089	11,877
Total impaired loans, Interest Income Recognized	0	10	74	129
Consumer Real Estate
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	2,324		2,324		2,085
With no related allowance recorded, Contractual Balance	2,402		2,402		2,097
With no related allowance recorded, Related Allowance	0		0		0
With an allowance recorded, Recorded Investment	734		734		0
With an allowance recorded, Contractual Balance	746		746		0
With an allowance recorded, Related Allowance	324		324		0
Total impaired loans, Recorded Investment	3,058		3,058		2,085
Total impaired loans, Contractual Balance	3,148		3,148		2,097
Total impaired loans, Related Allowance	324		324		0
With no related allowance recorded, Average Recorded Investment	2,467	1,672	2,205	1,668
With no related allowance recorded, Interest Income Recognized	8	1	11	1
With an allowance recorded, Average Recorded Investment	662	677	370	861
With an allowance recorded, Interest Income Recognized	6	3	6	13
Total impaired loans, Average Recorded Investment	3,129	2,349	2,575	2,529
Total impaired loans, Interest Income Recognized	14	4	17	14
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	332		332		436
With no related allowance recorded, Contractual Balance	336		336		498
With no related allowance recorded, Related Allowance	0		0		0
With an allowance recorded, Recorded Investment	19,878		19,878		14,721
With an allowance recorded, Contractual Balance	20,186		20,186		14,774
With an allowance recorded, Related Allowance	9,070		9,070		5,889
Total impaired loans, Recorded Investment	20,210		20,210		15,157
Total impaired loans, Contractual Balance	20,522		20,522		15,272
Total impaired loans, Related Allowance	9,070		9,070		5,889
With no related allowance recorded, Average Recorded Investment	336	642	384	800
With no related allowance recorded, Interest Income Recognized	1	0	1	16
With an allowance recorded, Average Recorded Investment	18,635	4,335	17,300	4,021
With an allowance recorded, Interest Income Recognized	346	4	350	4
Total impaired loans, Average Recorded Investment	18,971	4,977	17,684	4,821
Total impaired loans, Interest Income Recognized	347	4	351	20
Consumer
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	71		71		256
With no related allowance recorded, Contractual Balance	72		72		256
With no related allowance recorded, Related Allowance	0		0		0
With an allowance recorded, Recorded Investment	0		0		3
With an allowance recorded, Contractual Balance	0		0		3
With an allowance recorded, Related Allowance	0		0		1
Total impaired loans, Recorded Investment	71		71		259
Total impaired loans, Contractual Balance	72		72		259
Total impaired loans, Related Allowance	0		0		$ 1
With no related allowance recorded, Average Recorded Investment	71	0	164	0
With no related allowance recorded, Interest Income Recognized	1	0	1	0
With an allowance recorded, Average Recorded Investment	0	3	2	2
With an allowance recorded, Interest Income Recognized	0	0	0	0
Total impaired loans, Average Recorded Investment	71	3	166	2
Total impaired loans, Interest Income Recognized	$ 1	$ 0	$ 1	$ 0

Loans - Summary of Nonaccrual L

Loans - Summary of Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Loans Receivable [Line Items]
Nonaccrual loans	$ 35,653	$ 21,228
Nonaccrual Loans | Construction
Loans Receivable [Line Items]
Nonaccrual loans	1,070	792
Nonaccrual Loans | Commercial Real Estate
Loans Receivable [Line Items]
Nonaccrual loans	11,276	12,146
Nonaccrual Loans | Consumer Real Estate
Loans Receivable [Line Items]
Nonaccrual loans	2,978	1,919
Nonaccrual Loans | Commercial and Industrial
Loans Receivable [Line Items]
Nonaccrual loans	20,175	6,051
Nonaccrual Loans | Consumer
Loans Receivable [Line Items]
Nonaccrual loans	$ 154	$ 320

Loans - Changes in Carrying Amo

Loans - Changes in Carrying Amount of Accretable Yield for Purchased Credit Impaired Loans Acquired (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 115	$ 170
Acquisition	0	0
Net transfers from nonaccretable difference to accretable yield	0	816
Accretion	(86)	(832)
Balance, end of period	$ 29	$ 154

Loans - Summary of Company's Tr

Loans - Summary of Company's Troubled Debt Restructurings ("TDRs") (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Modifications [Line Items]
Current	$ 3,293	$ 1,487
Greater Than 30 Days Past Due	0	0
Nonaccrual TDRs	12,232	242
Total TDRs	15,525	1,729
Total real estate loans
Financing Receivable, Modifications [Line Items]
Current	2,816	1,196
Greater Than 30 Days Past Due	0	0
Nonaccrual TDRs	174	242
Total TDRs	2,990	1,438
Total real estate loans | Construction
Financing Receivable, Modifications [Line Items]
Current	2	237
Greater Than 30 Days Past Due	0	0
Nonaccrual TDRs	43	0
Total TDRs	45	237
Total real estate loans | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Current	2,227	349
Greater Than 30 Days Past Due	0	0
Nonaccrual TDRs	0	103
Total TDRs	2,227	452
Total real estate loans | Consumer Real Estate
Financing Receivable, Modifications [Line Items]
Current	587	610
Greater Than 30 Days Past Due	0	0
Nonaccrual TDRs	131	139
Total TDRs	718	749
Total other loans | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Current	477	291
Greater Than 30 Days Past Due	0	0
Nonaccrual TDRs	12,058	0
Total TDRs	$ 12,535	$ 291

Loans - Summary of Informatio56

Loans - Summary of Information Pertaining to Modified Terms of Loans (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)contract	Sep. 30, 2014USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	10	8
Pre- Modification Outstanding Recorded Investment	$ 15,525	$ 1,729
Post- Modification Outstanding Recorded Investment	$ 15,525	$ 1,729
Construction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	2	4
Pre- Modification Outstanding Recorded Investment	$ 45	$ 237
Post- Modification Outstanding Recorded Investment	$ 45	$ 237
Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	2	1
Pre- Modification Outstanding Recorded Investment	$ 2,227	$ 452
Post- Modification Outstanding Recorded Investment	$ 2,227	$ 452
Consumer Real Estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	3	2
Pre- Modification Outstanding Recorded Investment	$ 718	$ 749
Post- Modification Outstanding Recorded Investment	$ 718	$ 749
Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	3	1
Pre- Modification Outstanding Recorded Investment	$ 12,535	$ 291
Post- Modification Outstanding Recorded Investment	$ 12,535	$ 291

Goodwill and Other Acquired I57

Goodwill and Other Acquired Intangible Assets - Changes to Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 4,808	$ 4,808
Goodwill acquired during the year	1,192	0
Goodwill, ending balance	$ 6,000	$ 4,808

Goodwill and Other Acquired I58

Goodwill and Other Acquired Intangible Assets - Schedule of Definite-Lived Intangible Assets Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,721	$ 4,506
Accumulated Amortization	1,779	1,485
Net Carrying Amount	2,942	3,021
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,588	4,400
Accumulated Amortization	1,772	1,485
Net Carrying Amount	2,816	2,915
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	133	106
Accumulated Amortization	7	0
Net Carrying Amount	$ 126	$ 106

Goodwill and Other Acquired I59

Goodwill and Other Acquired Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets, estimated useful life (in years)			12 years
Amortization expense	$ 0.1	$ 0.2	$ 0.3	$ 0.5

Investments in Tax Credit Ent60

Investments in Tax Credit Entities - Narrative (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Net Investment Income [Line Items]
Tax credit as Percentage of project cost	39.00%
Assets	$ 4,345,467	$ 3,750,617
Cash and Due from Banks	33,759	32,484
Loans Receivable, Net	3,065,778	2,731,928
Other assets	39,851	30,175
Liabilities	$ 3,858,854	3,314,243
Federal
Net Investment Income [Line Items]
Tax credit as Percentage of project cost	39.00%
Period Of Credit Allowance	7 years
Qualified Equity Investments	$ 118,000
Federal | Maximum
Net Investment Income [Line Items]
Allocation Of Tax Credits Received	$ 46,000
Federal | Due Between One Year And Three Years
Net Investment Income [Line Items]
Investment Credit Percentage Due	5.00%
Federal | Due Between Year Four And Year Seven
Net Investment Income [Line Items]
Investment Credit Percentage Due	6.00%
Federal NMTC | Federal
Net Investment Income [Line Items]
CDE investments in QEI projects located in low-income communities with poverty rates (as a percent)	20.00%
CDE investments in QEI projects located in low-income communities with median family income (as a percent)	80.00%
Allocation Of Tax Credits Received	$ 118,000	$ 118,000
Amortization of tax credit investments	46,000
Bank Owned CDEs | Federal
Net Investment Income [Line Items]
Equity Method Investment, Aggregate Cost	118,000
Assets	130,900
Cash and Due from Banks	6,000
Loans Receivable, Net	112,300
Other assets	12,600
Liabilities	400
Capital	$ 130,500
Community Development Fund | Federal
Net Investment Income [Line Items]
Qualified Equity Investment Percentage Of Proceeds	85.00%
Parent Company | Bank Owned CDEs | Federal
Net Investment Income [Line Items]
Equity Method Investment, Aggregate Cost	$ 40,000
Other Investors and Leverage Lenders | Bank Owned CDEs | Federal
Net Investment Income [Line Items]
Equity Method Investment, Aggregate Cost	78,000
Leverage Lender | Bank Owned CDEs | Federal
Net Investment Income [Line Items]
Equity Method Investment, Aggregate Cost	$ 17,500
Low-Income Housing Credits
Net Investment Income [Line Items]
Compliance period (years)	15 years
Low-Income Housing Credits | Minimum
Net Investment Income [Line Items]
Federal Tax Credit, Adjustment Period (years)	10 years
Low-Income Housing Credits | Maximum
Net Investment Income [Line Items]
Federal Tax Credit, Adjustment Period (years)	15 years
Federal and State Historic Rehabilitation
Net Investment Income [Line Items]
Compliance period (years)	5 years

Investments in Tax Credit Ent61

Investments in Tax Credit Entities - Schedule of Investments and Tax Benefits (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Net Investment Income [Line Items]
Investment	$ 459,737	$ 405,981
Total Impairment	(41,958)	(26,528)
Loans to Investment Funds	(127,520)	(120,540)
Elimination	(118,000)	(118,000)
Net Investment	172,259	140,913
Tax Benefits Recognized Through Prior Year	103,402	64,957
Tax Benefits Expected to be Recognized in Current Year	61,966	38,445
Tax Benefits Expected to be Recognized in Future Year and Thereafter	81,118	134,879
Total Tax Benefits Expected to be Recognized	246,486	238,281
Low-Income Housing
Net Investment Income [Line Items]
Investment	36,162	43,733
Total Impairment	(7,631)	(7,264)
Loans to Investment Funds	0	0
Elimination	0	0
Net Investment	28,531	36,469
Low Income Housing Tax Credits Benefits Recognized, Prior Year	13,188	9,546
Low Income Housing Tax Credits Benefits Recognized, Current Year	4,015	3,642
Low Income Housing Tax Credits Benefits Recognizable Year Two And After	38,093	42,109
Total Tax Benefits Expected to be Recognized	55,296	55,297
Federal and State Historic Rehabilitation
Net Investment Income [Line Items]
Investment	66,518	48,129
Total Impairment	(6,004)	(3,412)
Loans to Investment Funds	0	0
Elimination	0	0
Net Investment	60,514	44,717
Historic Rehabilitation Tax Credits Benefits Recognized, Prior Year	37,144	17,823
Historic Rehabilitation Tax Credits Benefits Recognized, Current Year	41,602	19,321
Historic Rehabilitation Tax Credits Benefits Recognizable Year Two And After	0	37,295
Total Tax Benefits Expected to be Recognized	78,746	74,439
Federal
Net Investment Income [Line Items]
Investment	357,057	314,119
Total Impairment	(28,323)	(15,852)
Loans to Investment Funds	(127,520)	(120,540)
Elimination	(118,000)	(118,000)
Net Investment	83,214	59,727
Tax Benefits Recognized Through Prior Year	53,070	37,588
Tax Benefits Expected to be Recognized in Current Year	16,349	15,482
Tax Benefits Expected to be Recognized in Future Year and Thereafter	43,025	55,475
Total Tax Benefits Expected to be Recognized	112,444	108,545
Federal | Bank Owned CDEs
Net Investment Income [Line Items]
Investment	157,991	123,700
Total Impairment	(6,779)	0
Loans to Investment Funds	0	0
Elimination	(118,000)	(118,000)
Net Investment	33,212	5,700
Tax Benefits Recognized Through Prior Year	16,490	10,375
Tax Benefits Expected to be Recognized in Current Year	6,580	6,115
Tax Benefits Expected to be Recognized in Future Year and Thereafter	22,949	29,530
Total Tax Benefits Expected to be Recognized	46,019	46,020
Federal | Non-Bank Owned CDEs
Net Investment Income [Line Items]
Investment	170,839	162,192
Total Impairment	(21,544)	(15,852)
Loans to Investment Funds	(127,520)	(120,540)
Elimination	0	0
Net Investment	21,775	25,800
Tax Benefits Recognized Through Prior Year	36,580	27,213
Tax Benefits Expected to be Recognized in Current Year	9,769	9,367
Tax Benefits Expected to be Recognized in Future Year and Thereafter	20,076	25,945
Total Tax Benefits Expected to be Recognized	66,425	62,525
Federal | Federal and State Historic Rehabilitation
Net Investment Income [Line Items]
Investment	58,561	41,794
Total Impairment	(5,805)	(3,412)
Loans to Investment Funds	0	0
Elimination	0	0
Net Investment	52,756	38,382
Historic Rehabilitation Tax Credits Benefits Recognized, Prior Year	37,144	17,823
Historic Rehabilitation Tax Credits Benefits Recognized, Current Year	41,602	19,321
Historic Rehabilitation Tax Credits Benefits Recognizable Year Two And After	0	37,295
Total Tax Benefits Expected to be Recognized	78,746	74,439
Federal | Federal NMTC
Net Investment Income [Line Items]
Allocation Of Tax Credits Received	118,000	118,000
Federal | Federal Rehabilitation Tax Credit
Net Investment Income [Line Items]
Net Investment	10,500	12,600
State
Net Investment Income [Line Items]
Investment	28,227	28,227
Total Impairment	0	0
Loans to Investment Funds	0	0
Elimination	0	0
Net Investment	28,227	28,227
Tax Benefits Recognized Through Prior Year	0	0
Tax Benefits Expected to be Recognized in Current Year	0	0
Tax Benefits Expected to be Recognized in Future Year and Thereafter	0	0
Total Tax Benefits Expected to be Recognized	0	0
State | State Rehabilitation Tax Credit
Net Investment Income [Line Items]
Investment	7,957	6,335
Total Impairment	(199)	0
Loans to Investment Funds	0	0
Elimination	0	0
Net Investment	7,758	6,335
Historic Rehabilitation Tax Credits Benefits Recognized, Prior Year	0	0
Historic Rehabilitation Tax Credits Benefits Recognized, Current Year	0	0
Historic Rehabilitation Tax Credits Benefits Recognizable Year Two And After	0	0
Total Tax Benefits Expected to be Recognized	$ 0	$ 0

Investments in Tax Credit Ent62

Investments in Tax Credit Entities - Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Investment Income [Line Items]
Impairment of tax credit investments	$ 3,253	$ 3,974	$ 10,752	$ 10,178
Federal NMTC
Net Investment Income [Line Items]
Impairment of tax credit investments	1,114	2,972	7,793	7,332
Low-Income Housing
Net Investment Income [Line Items]
Impairment of tax credit investments	606	541	367	1,624
Federal and State Historic Rehabilitation
Net Investment Income [Line Items]
Impairment of tax credit investments	$ 1,533	$ 461	$ 2,592	$ 1,222

Investments in Tax Credit Ent63

Investments in Tax Credit Entities - Summary of Basis Reduction Recorded Related to Investments in Tax Credit Entities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Investment Income [Line Items]
Investment Tax Credit, Reduction In Tax Basis	$ 506	$ 1,334	$ 1,519	$ 2,744
Federal NMTC
Net Investment Income [Line Items]
Investment Tax Credit, Reduction In Tax Basis	368	350	1,104	1,051
Federal and State Historic Rehabilitation
Net Investment Income [Line Items]
Investment Tax Credit, Reduction In Tax Basis	$ 138	$ 984	$ 415	$ 1,693

Investments in Tax Credit Ent64

Investments in Tax Credit Entities - Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Net Investment Income [Line Items]
Loans Receivable Real Estate	$ 254,213	$ 265,452
Construction
Net Investment Income [Line Items]
Loans Receivable Real Estate	45,353	80,741
Commercial Real Estate
Net Investment Income [Line Items]
Loans Receivable Real Estate	71,305	67,520
Commercial and Industrial
Net Investment Income [Line Items]
Loans Receivable Real Estate	$ 137,555	$ 117,191

Variable Interest Entities (Det

Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Assets	$ 4,345,467	$ 3,750,617
Real estate	51,727	12,771
Other assets	39,851	30,175
Liabilities	3,858,854	$ 3,314,243
Low-Income Housing Credits | Federal
Variable Interest Entity [Line Items]
Assets	40,400
Real estate	37,200
Other assets	3,200
Liabilities	3,000
Capital	$ 4,900

Long-term Borrowings (Narrative

Long-term Borrowings (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended
	Mar. 31, 2015	Feb. 28, 2015	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term borrowings			$ 103,392	$ 40,000
5.75% Subordinated Notes due 2025
Debt Instrument [Line Items]
Long-term borrowings		$ 60,000	$ 60,000	0
Debt instrument, fixed interest rate (as a percentage)		5.75%	5.75%
Debt Instrument, redemption price (as a percentage)		100.00%
Employee Stock Ownership Trust
Debt Instrument [Line Items]
Debt instrument, fixed interest rate (as a percentage)			3.25%
Number of shares purchased in ESOP	100,000
Price of shares purchased in ESOP	$ 3,300
Number of shares pledged to ESOP loan			93,000
Credit Suisse Securities (USA) LLC
Debt Instrument [Line Items]
Long-term borrowings			$ 40,000	$ 40,000
Debt instrument, effective interest rate (as a percent)			1.63%
LIBOR | Credit Suisse Securities (USA) LLC
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate (as a percent)			1.35%

Long-term Borrowings (Details)

Long-term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Feb. 28, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term borrowings	$ 103,392		$ 40,000
5.75% Subordinated Notes due 2025
Debt Instrument [Line Items]
Debt instrument, fixed interest rate (as a percentage)	5.75%	5.75%
Long-term borrowings	$ 60,000	$ 60,000	0
FNBB
Debt Instrument [Line Items]
Long-term borrowings	3,392		0
Credit Suisse Securities (USA) LLC
Debt Instrument [Line Items]
Long-term borrowings	$ 40,000		$ 40,000

Derivative - Interest Rate Sw68

Derivative - Interest Rate Swap Agreements - Additional Information (Detail)	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015USD ($)swap	Mar. 31, 2015USD ($)swap	Sep. 30, 2015USD ($)swap	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)swap	Sep. 30, 2014USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)swap	Dec. 31, 2014contract	Dec. 31, 2014swap	Dec. 31, 2012USD ($)
Interest Rate Derivatives Outstanding [Line Items]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax			$ (7,525,000)	$ (1,742,000)	$ (4,296,000)	$ (10,509,000)
Amount of derivative will mature within next 12 months	$ 0		0		0
Interest rate swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract							$ 165,000,000
Counterparty C
Interest Rate Derivatives Outstanding [Line Items]
Financial Instruments Owned and Pledged as Collateral	4,600,000		4,600,000		4,600,000
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	$ 4,300,000		$ 4,300,000		$ 4,300,000
Counterparty C | Interest rate swaps
Interest Rate Derivatives Outstanding [Line Items]
Number of interest rate swaps									3	3
Counterparty C | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Number of interest rate swaps | swap	2	4	2		2
Notional amount of derivative contract	$ 70,000,000	$ 75,000,000	$ 70,000,000		$ 70,000,000
Counterparty C | Prime plus 1% | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract	$ 40,000,000		$ 40,000,000		$ 40,000,000			$ 40,000,000
Debt instrument basis spread on variable rate (as a percent)	1.00%
Derivative, Fixed Interest Rate (as a percent)	5.49%		5.49%		5.49%
Counterparty C | Prime Rate | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract	$ 30,000,000		$ 30,000,000		$ 30,000,000			30,000,000
Derivative, Fixed Interest Rate (as a percent)	4.50%		4.50%		4.50%
Counterparty C | Prime plus 1% floored at 5% | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract		$ 40,000,000
Debt instrument basis spread on variable rate (as a percent)		1.00%
Derivative, Fixed Interest Rate (as a percent)		5.813%
Debt instrument interest floored rate (as a percent)		5.00%
Counterparty C | Prime plus 2%, One | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract		$ 15,000,000
Debt instrument basis spread on variable rate (as a percent)		2.00%
Derivative, Fixed Interest Rate (as a percent)		6.561%
Counterparty C | Prime plus 2%, Two | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract		$ 10,000,000
Debt instrument basis spread on variable rate (as a percent)		2.00%
Counterparty C | Prime plus 2.25% | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract		$ 10,000,000
Debt instrument basis spread on variable rate (as a percent)		2.25%
Derivative, Fixed Interest Rate (as a percent)		6.811%
Counterparty A
Interest Rate Derivatives Outstanding [Line Items]
Amounts of gains or losses have been reclassified from accumulated comprehensive income			$ 300,000	$ 0	$ 800,000	$ 0
Counterparty A | Interest rate swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract											$ 115,000,000
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax							$ (8,000,000)
Counterparty B
Interest Rate Derivatives Outstanding [Line Items]
Financial Instruments Owned and Pledged as Collateral	$ 18,400,000		18,400,000		18,400,000
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	$ 19,000,000		$ 19,000,000		19,000,000
Counterparty B | Interest rate swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract								$ 150,000,000
Counterparty B | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Number of interest rate swaps | swap								4
Notional amount of derivative contract								$ 70,000,000
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax					$ 1,300,000
Number of Interest Rate Derivatives Terminated | swap	2
Counterparty B | Prime plus 1% | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Debt instrument basis spread on variable rate (as a percent)								1.00%
Counterparty B | Prime plus 1% floored at 5% | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Debt instrument basis spread on variable rate (as a percent)								1.00%
Debt instrument interest floored rate (as a percent)								5.00%
Counterparty B | Prime plus 1% floored at 5.5% | Interest rate-prime swaps
Interest Rate Derivatives Outstanding [Line Items]
Notional amount of derivative contract								$ 180,000,000
Debt instrument basis spread on variable rate (as a percent)								1.00%
Debt instrument interest floored rate (as a percent)								5.50%

Derivative - Interest Rate Sw69

Derivative - Interest Rate Swap Agreements - Derivative Instruments at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Liabilities Fair Value	$ 19,330	$ 12,953
Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets Fair Value	6,286	3,079
Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Fair Value	25,616	15,995
Counterparty B | Interest rate swaps | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets Fair Value	0	0
Counterparty B | Interest rate swaps | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Fair Value	22,100	15,995
Counterparty B | Interest rate-prime swaps | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets Fair Value	4,687	3,042
Counterparty B | Interest rate-prime swaps | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Fair Value	0	0
Counterparty C | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative Liabilities Fair Value	1,917
Counterparty C | Interest rate swaps | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets Fair Value	1,599	37
Counterparty C | Interest rate swaps | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Fair Value	0	0
Counterparty C | Interest rate-prime swaps | Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets Fair Value	0	0
Counterparty C | Interest rate-prime swaps | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities Fair Value	$ 3,516	$ 0

Derivative - Interest Rate Sw70

Derivative - Interest Rate Swap Agreements - Master Netting Arrangement (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivative liabilities:
Gross Amounts Presented in the Balance Sheet	$ 19,330	$ 12,953
Gross Amounts Not Offset in the Balance Sheet, Derivatives	0	0
Gross Amounts Not Offset in the Balance Sheet, Collateral	0	0
Net	19,330	12,953
Interest Rate Swap and Prime Swaps | Counterparty B
Derivative liabilities:
Gross Amounts Presented in the Balance Sheet	17,413	12,953
Gross Amounts Not Offset in the Balance Sheet, Derivatives	0	0
Gross Amounts Not Offset in the Balance Sheet, Collateral	0	0
Net	17,413	$ 12,953
Interest rate swaps | Counterparty C
Derivative liabilities:
Gross Amounts Presented in the Balance Sheet	1,917
Gross Amounts Not Offset in the Balance Sheet, Derivatives	0
Gross Amounts Not Offset in the Balance Sheet, Collateral	0
Net	$ 1,917

Derivative - Interest Rate Sw71

Derivative - Interest Rate Swap Agreements - Effect of Hedging Instruments (Details) - Cash Flow Hedging - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion)	$ (16,382)	$ (8,885)
Interest rate swaps | Counterparty A
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion)	(4,663)	(2,408)
Interest Rate Swap and Prime Swaps | Counterparty B
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion)	(10,472)	(6,477)
Interest Rate Swap and Prime Swaps | Counterparty C
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI, net of taxes (Effective Portion)	$ (1,247)	$ 0

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Tax Benefit on Statement of Income (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current tax expense			$ 2,149,000	$ 0
Deferred tax benefit			(44,379,000)	(16,354,000)
Total tax benefit	$ (14,562,000)	$ (6,612,000)	(42,230,000)	$ (16,354,000)
Deferred tax assets, valuation allowance	$ 0		$ 0		$ 0

Commitments and Contingencies -

Commitments and Contingencies - Summary of Total Notional Amount of Loan Commitments and Standby Letters of Credit (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Liability for Losses on Unfunded Commitments	$ 300	$ 200
Standby letters of credit	98,688	110,636
Unused loan commitments	754,618	509,665
Total	$ 853,306	$ 620,301

Shareholders' Equity (Details)

Shareholders' Equity (Details) - Convertible Preferred Stock Series C - shares	1 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2013	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2011
Class of Stock [Line Items]
Convertible preferred stock shares converted (in shares)	364,983	551,858
Preferred stock, share issued			0	364,983	916,841
Preferred stock, share outstanding			0	364,983

Accumulated Other Comprehensi75

Accumulated Other Comprehensive Income - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ (19,737)	$ (16,515)
Other comprehensive income (loss) before income taxes:
Net change in unrealized gain (loss)			(994)	(345)
Reclassification of net losses realized and included in earnings	$ 253	$ 0	792	0
Reclassification of net gains realized and included in earnings	0	(79)	0	(135)
Amortization of unrealized net gain			501	386
Income tax expense (benefit)	(1,292)	(441)	105	(32)
Ending balance	(19,543)	(16,577)	(19,543)	(16,577)
Cash Flow Hedges
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			(8,396)	(2,054)
Other comprehensive income (loss) before income taxes:
Net change in unrealized gain (loss)			(6,414)	(10,509)
Reclassification of net losses realized and included in earnings			0
Reclassification of net gains realized and included in earnings				0
Amortization of unrealized net gain			0	0
Income tax expense (benefit)			(2,245)	(3,678)
Ending balance	(12,565)	(8,885)	(12,565)	(8,885)
Terminated Cash Flow Hedge
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			(5,194)
Other comprehensive income (loss) before income taxes:
Net change in unrealized gain (loss)			1,326
Reclassification of net losses realized and included in earnings			792
Amortization of unrealized net gain			0
Income tax expense (benefit)			741
Ending balance	(3,817)		(3,817)
Transfers of Available for Sale Securities to Held to Maturity
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			(3,354)	(3,710)
Other comprehensive income (loss) before income taxes:
Net change in unrealized gain (loss)			0	0
Reclassification of net losses realized and included in earnings			0
Reclassification of net gains realized and included in earnings				0
Amortization of unrealized net gain			501	386
Income tax expense (benefit)			176	135
Ending balance	(3,029)	(3,459)	(3,029)	(3,459)
Available for Sale Securities
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			(2,793)	(10,751)
Other comprehensive income (loss) before income taxes:
Net change in unrealized gain (loss)			4,094	10,164
Reclassification of net losses realized and included in earnings			0
Reclassification of net gains realized and included in earnings				(135)
Amortization of unrealized net gain			0	0
Income tax expense (benefit)			1,433	3,511
Ending balance	$ (132)	$ (4,233)	$ (132)	$ (4,233)

Capital Requirements and Othe76

Capital Requirements and Other Regulatory Matters (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
First NBC Bank Holding Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage capital, Actual, Ratio (as a percent)	9.53%	10.66%
Tier 1 risk-based capital, Actual, Ratio (as a percent)	10.47%	11.59%
Total risk-based capital, Actual, Ratio (as a percent)	13.30%	12.84%
Common equity tier 1 risk-based capital, Actual, Ratio (as a percent)	10.47%
Tier 1 leverage capital, Actual, Amount	$ 395,680	$ 387,224
Tier 1 risk-based capital, Actual, Amount	395,680	387,224
Total risk-based capital, Actual, Amount	503,785	$ 428,962
Common equity tier 1 risk-based capital, Actual, Amount	$ 395,680
First NBC Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage capital, Actual, Ratio (as a percent)	10.23%	9.95%
Tier 1 risk-based capital, Actual, Ratio (as a percent)	11.24%	10.82%
Total risk-based capital, Actual, Ratio (as a percent)	12.51%	12.07%
Common equity tier 1 risk-based capital, Actual, Ratio (as a percent)	11.24%
Tier 1 leverage capital, Actual, Amount	$ 424,150	$ 361,078
Tier 1 risk-based capital, Actual, Amount	424,150	361,078
Total risk-based capital, Actual, Amount	472,195	$ 402,816
Common equity tier 1 risk-based capital, Actual, Amount	$ 424,150
Tier 1 leverage capital, Well Capitalized Minimum (as a percent)	5.00%	5.00%
Tier 1 risk-based capital, Well Capitalized Minimum (as a percent)	8.00%	6.00%
Total risk-based capital, Well Capitalized Minimum (as a percent)	10.00%	10.00%
Common equity tier 1 risk-based capital, Well Capitalized Minimum (as a percent)	6.50%

Fair Value of Financial Instr77

Fair Value of Financial Instruments - Carrying Value and Fair Value Measurements of Financial Assets and Liabilities on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Available for sale:
Investment securities available for sale	$ 273,702	$ 247,647
U.S. government agency securities
Available for sale:
Investment securities available for sale	154,652	157,527
U.S. Treasury securities
Available for sale:
Investment securities available for sale	12,886	12,610
Municipal securities
Available for sale:
Investment securities available for sale	12,219	12,246
Mortgage-backed securities
Available for sale:
Investment securities available for sale	54,997	57,087
Corporate bonds
Available for sale:
Investment securities available for sale	7,989	8,177
Other equity securities
Available for sale:
Investment securities available for sale	22
Other debt securities
Available for sale:
Investment securities available for sale	30,937
Quoted Prices in Active Markets for Identical Assets ( Level 1)
Available for sale:
Investment securities available for sale	22	0
Derivative instruments		0
Liabilities
Derivative instruments	0	0
Significant Other Observable Inputs (Level 2)
Available for sale:
Investment securities available for sale	273,680	247,647
Derivative instruments		37
Liabilities
Derivative instruments	19,330	12,953
Significant Unobservable Inputs (Level 3)
Available for sale:
Investment securities available for sale	0	0
Derivative instruments		0
Liabilities
Derivative instruments	0	0
Fair Value, Measurements, Recurring
Available for sale:
Investment securities available for sale		247,647
Derivative instruments		37
Total	273,702	247,684
Liabilities
Derivative instruments	19,330	12,953
Fair Value, Measurements, Recurring | U.S. government agency securities
Available for sale:
Investment securities available for sale	154,652	157,527
Fair Value, Measurements, Recurring | U.S. Treasury securities
Available for sale:
Investment securities available for sale	12,886	12,610
Fair Value, Measurements, Recurring | Municipal securities
Available for sale:
Investment securities available for sale	12,219	12,246
Fair Value, Measurements, Recurring | Mortgage-backed securities
Available for sale:
Investment securities available for sale	54,997	57,087
Fair Value, Measurements, Recurring | Corporate bonds
Available for sale:
Investment securities available for sale	7,989	8,177
Fair Value, Measurements, Recurring | Other equity securities
Available for sale:
Investment securities available for sale	22
Fair Value, Measurements, Recurring | Other debt securities
Available for sale:
Investment securities available for sale	30,937
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1)
Available for sale:
Investment securities available for sale		0
Derivative instruments		0
Total	22	0
Liabilities
Derivative instruments	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1) | U.S. government agency securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1) | U.S. Treasury securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1) | Municipal securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1) | Mortgage-backed securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1) | Corporate bonds
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1) | Other equity securities
Available for sale:
Investment securities available for sale	22
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets ( Level 1) | Other debt securities
Available for sale:
Investment securities available for sale	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Available for sale:
Investment securities available for sale		247,647
Derivative instruments		37
Total	273,680	247,684
Liabilities
Derivative instruments	19,330	12,953
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency securities
Available for sale:
Investment securities available for sale	154,652	157,527
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities
Available for sale:
Investment securities available for sale	12,886	12,610
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal securities
Available for sale:
Investment securities available for sale	12,219	12,246
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities
Available for sale:
Investment securities available for sale	54,997	57,087
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate bonds
Available for sale:
Investment securities available for sale	7,989	8,177
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other equity securities
Available for sale:
Investment securities available for sale	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other debt securities
Available for sale:
Investment securities available for sale	30,937
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Available for sale:
Investment securities available for sale		0
Derivative instruments		0
Total	0	0
Liabilities
Derivative instruments	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Municipal securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities
Available for sale:
Investment securities available for sale	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate bonds
Available for sale:
Investment securities available for sale	0	$ 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other equity securities
Available for sale:
Investment securities available for sale	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other debt securities
Available for sale:
Investment securities available for sale	$ 0

Fair Value of Financial Instr78

Fair Value of Financial Instruments - Carrying Value and Fair Value Measurements of Financial Assets and Liabilities on Non Recurring Basis (Detail) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Loans	$ 31,760	$ 20,679
Other real estate owned	2,864	3,022
Total	34,624	23,701
Quoted Prices in Active Markets for Identical Assets ( Level 1)
Assets
Loans	0	0
Other real estate owned	0	0
Total	0	0
Significant Other Observable Inputs (Level 2)
Assets
Loans	0	0
Other real estate owned	0	0
Total	0	0
Significant Unobservable Inputs (Level 3)
Assets
Loans	31,760	20,679
Other real estate owned	2,864	3,022
Total	$ 34,624	$ 23,701

Fair Value of Financial Instr79

Fair Value of Financial Instruments - Carrying Value and Fair Value Measurements of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financial Assets:
Cash and due from banks	$ 33,759	$ 32,484
Short-term investments	179,526	18,404
Investment in short-term receivables	182,945	237,135
Investment securities available for sale	273,702	247,647
Investment securities held to maturity	84,601	90,956
Loans and loans held for sale	2,647	1,622
Cash surrender value of bank-owned life insurance	48,342	47,289
Financial Liabilities:
Deposits, noninterest-bearing	416,405	364,534
Deposits, interest-bearing	3,200,513	2,756,316
Repurchase agreements	93,775	117,991
Long-term borrowings	103,392	40,000
Quoted Prices in Active Markets for Identical Assets ( Level 1)
Financial Assets:
Cash and due from banks	33,759	32,484
Short-term investments	179,526	18,404
Investment in short-term receivables	182,945	237,135
Investment securities available for sale	22	0
Investment securities held to maturity	0	0
Loans and loans held for sale	0	0
Cash surrender value of bank-owned life insurance	48,342	47,289
Derivative instruments		0
Financial Liabilities:
Deposits, noninterest-bearing	0	0
Deposits, interest-bearing	0	0
Repurchase agreements	0	0
Long-term borrowings	0	0
Derivative instruments	0	0
Significant Other Observable Inputs (Level 2)
Financial Assets:
Cash and due from banks	0	0
Short-term investments	0	0
Investment in short-term receivables	0	0
Investment securities available for sale	273,680	247,647
Investment securities held to maturity	84,601	90,956
Loans and loans held for sale	0	0
Cash surrender value of bank-owned life insurance	0	0
Derivative instruments		37
Financial Liabilities:
Deposits, noninterest-bearing	416,405	364,534
Deposits, interest-bearing	0	0
Repurchase agreements	93,775	117,991
Long-term borrowings	0	0
Derivative instruments	19,330	12,953
Significant Unobservable Inputs (Level 3)
Financial Assets:
Cash and due from banks	0	0
Short-term investments	0	0
Investment in short-term receivables	0	0
Investment securities available for sale	0	0
Investment securities held to maturity	0	0
Loans and loans held for sale	3,103,534	3,003,280
Cash surrender value of bank-owned life insurance	0	0
Derivative instruments		0
Financial Liabilities:
Deposits, noninterest-bearing	0	0
Deposits, interest-bearing	3,162,486	2,722,134
Repurchase agreements	0	0
Long-term borrowings	106,591	42,270
Derivative instruments	0	0
Carrying Amount
Financial Assets:
Cash and due from banks	33,759	32,484
Short-term investments	179,526	18,404
Investment in short-term receivables	182,945	237,135
Investment securities available for sale	273,702	247,647
Investment securities held to maturity	83,319	89,076
Loans and loans held for sale	3,121,501	2,775,886
Cash surrender value of bank-owned life insurance	48,342	47,289
Derivative instruments		37
Financial Liabilities:
Deposits, noninterest-bearing	416,405	364,534
Deposits, interest-bearing	3,200,513	2,756,316
Repurchase agreements	93,775	117,991
Long-term borrowings	103,392	40,000
Derivative instruments	19,330	12,953
Total Fair Value
Financial Assets:
Cash and due from banks	33,759	32,484
Short-term investments	179,526	18,404
Investment in short-term receivables	182,945	237,135
Investment securities available for sale	273,702	247,647
Investment securities held to maturity	84,601	90,956
Loans and loans held for sale	3,103,534	3,003,280
Cash surrender value of bank-owned life insurance	48,342	47,289
Derivative instruments		37
Financial Liabilities:
Deposits, noninterest-bearing	416,405	364,534
Deposits, interest-bearing	3,162,486	2,722,134
Repurchase agreements	93,775	117,991
Long-term borrowings	106,591	42,270
Derivative instruments	$ 19,330	$ 12,953