CenterState Bank (CSFL) 10-Q4 May 152015 Q1 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2015	Apr. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Registrant Name	CenterState Banks, Inc.
Entity Central Index Key	1102266
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		45,442,124

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$59,295	$52,067
Federal funds sold and Federal Reserve Bank deposits	197,046	106,346
Cash and cash equivalents	256,341	158,413
Trading securities, at fair value	1,017	3,420
Investment securities available for sale, at fair value	520,247	517,457
Investment securities held to maturity (fair value of $230,439 and $238,431 at March 31, 2015 and December 31, 2014, respectively)	228,870	237,362
Loans held for sale, at lower of cost or fair value	522	1,251
Loans, excluding purchased credit impaired	2,201,395	2,152,759
Purchased credit impaired loans	263,268	276,766
Allowance for loan losses	-20,980	-19,898
Net Loans	2,443,683	2,409,627
Bank premises and equipment, net	100,526	98,848
Accrued interest receivable	9,275	8,999
Federal Home Loan Bank and Federal Reserve Bank stock, at cost	14,011	14,219
Goodwill	76,739	76,739
Core deposit intangible	13,789	14,417
Trust intangible	946	984
Bank owned life insurance	84,137	83,544
Other repossessed real estate owned covered by FDIC loss share agreements	13,528	19,404
Other repossessed real estate owned	7,586	8,896
FDIC indemnification asset	41,594	49,054
Deferred income tax asset, net	48,502	49,587
Bank property held for sale	2,449	2,675
Prepaid expense and other assets	24,810	21,973
TOTAL ASSETS	3,888,572	3,776,869
Deposits:
Demand - non-interest bearing	1,112,282	1,048,874
Demand - interest bearing	623,370	607,359
Savings and money market accounts	954,685	947,995
Time deposits	459,035	487,812
Total deposits	3,149,372	3,092,040
Securities sold under agreement to repurchase	31,071	27,022
Federal funds purchased	187,443	151,992
Corporate debentures	23,961	23,917
Accrued interest payable	293	336
Payables and accrued expenses	33,367	29,085
Total liabilities	3,425,507	3,324,392
Stockholders' equity:
Common stock, $.01 par value: 100,000,000 shares authorized; 45,408,924 and 45,323,553 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively	454	453
Additional paid-in capital	389,578	388,698
Retained earnings	67,966	59,273
Accumulated other comprehensive income	5,067	4,053
Total stockholders' equity	463,065	452,477
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$3,888,572	$3,776,869

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Held-to-maturity securities, fair value	$230,439	$238,431
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	45,408,924	45,323,553
Common stock, shares outstanding	45,408,924	45,323,553

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (unaudited) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest income:
Loans	$34,268	$25,729
Investment securities available for sale:
Taxable	4,282	3,478
Tax-exempt	539	336
Federal funds sold and other	396	239
Total interest income	39,485	29,782
Interest expense:
Deposits	1,447	1,337
Securities sold under agreement to repurchase	49	23
Federal funds purchased	132	6
Corporate debentures	237	223
Total interest expenses	1,865	1,589
Net interest income	37,620	28,193
Provision for loan losses	1,642	-41
Net interest income after loan loss provision	35,978	28,234
Non interest income:
Correspondent banking capital markets revenue	5,694	3,136
Other correspondent banking related revenue	1,106	795
Service charges on deposit accounts	2,261	2,262
Debit, prepaid, ATM and merchant card related fees	1,701	1,506
Wealth management related revenue	970	1,217
FDIC indemnification income	667	1,268
FDIC indemnification asset amortization	-4,350	-5,185
Bank owned life insurance income	593	352
Other service charges and fees	439	409
Total other income	9,081	5,760
Non interest expense:
Salaries, wages and employee benefits	19,580	15,681
Occupancy expense	2,445	1,960
Depreciation of premises and equipment	1,433	1,478
Supplies, stationary and printing	365	227
Marketing expenses	538	620
Data processing expense	1,330	1,039
Legal, audit and other professional fees	735	775
Core deposit intangible ("CDI") amortization	628	331
Postage and delivery	368	268
ATM and debit card related expenses	433	474
Bank regulatory expenses	910	631
(Gain) loss on sale of repossessed real estate (bOREOb)	-1,528	77
Valuation write down of repossessed real estate (bOREOb)	389	1,020
Gain on repossessed assets other than real estate	-1	-2
Foreclosure related expenses	623	729
Merger and acquisition related expenses	0	2,347
Branch closure and efficiency initiatives	0	3,158
Other expenses	2,355	1,590
Total other expenses	30,603	32,403
Income before provision for income taxes	14,456	1,591
Provision for income taxes	5,308	538
Net income	9,148	1,053
Other comprehensive income, net of tax:
Unrealized securities holding gain, net of income taxes	1,014	1,128
Less: reclassified adjustments for gain included in net income, net of income taxes, of $0 and $0, respectively	0	0
Net unrealized gain on available for sale securities, net of income taxes	1,014	1,128
Total comprehensive income	$10,162	$2,181
Earnings per share:
Basic	$0.20	$0.03
Diluted	$0.20	$0.03
Common shares used in the calculation of earnings per share:
Basic	45,127,940	34,465,022
Diluted	45,657,624	34,862,703

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (unaudited) (Parenthetical) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Reclassifications of gain included in net income, income taxes	$0	$0

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) (USD $)	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Gulf Stream [Member]	Gulf Stream [Member]	Gulf Stream [Member]
In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Gulf Stream [Member]	Common Stock [Member]	Additional Paid in Capital [Member]
Balances at beginning at Dec. 31, 2013	$273,379	$301	$229,544	$48,018	($4,484)
Balances at beginning, shares at Dec. 31, 2013		30,112,475
Net income	1,053			1,053
Unrealized holding gain/loss on available for sale securities, net of deferred income tax	1,128				1,128
Dividends paid - common ($0.01 per share)	-355			-355
Stock grants issued	216		216
Stock grants issued, shares		19,856
Stock based compensation expense	67		67
Stock options exercised, including tax benefit	909	2	907
Stock options exercised including tax benefit, Shares		207,658
Stock issued pursuant to Gulfstream acquisition						53,150	52	53,098
Stock issued pursuant to acquisition, Shares							5,195,541
Stock options acquired and converted pursuant to Gulfstream acquisition						3,617		3,617
Balances at ending at Mar. 31, 2014	333,164	355	287,449	48,716	-3,356
Balances at ending, shares at Mar. 31, 2014		35,535,530
Balances at beginning at Dec. 31, 2014	452,477	453	388,698	59,273	4,053
Balances at beginning, shares at Dec. 31, 2014	45,323,553	45,323,553
Net income	9,148			9,148
Unrealized holding gain/loss on available for sale securities, net of deferred income tax	1,014				1,014
Dividends paid - common ($0.01 per share)	-455			-455
Stock grants issued	608	1	607
Stock grants issued, shares		45,053
Stock based compensation expense	56		56
Stock options exercised, including tax benefit	217		217
Stock options exercised including tax benefit, Shares		40,318
Balances at ending at Mar. 31, 2015	$463,065	$454	$389,578	$67,966	$5,067
Balances at ending, shares at Mar. 31, 2015	45,408,924	45,408,924

CONDENSED_CONSOLIDATED_STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (unaudited) (Parenthetical) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Member]
Unrealized holding gain/loss on available for sale securities, deferred income tax benefit	$637	($708)
Retained Earnings [Member]
Dividends paid - common, per share	$0.01	$0.01

CONDENSED_CONSOLIDATED_STATEME4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$9,148	$1,053
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,642	-41
Depreciation of premises and equipment	1,433	1,478
Accretion of purchase accounting adjustments	-10,523	-8,092
Net amortization of investment securities	2,013	1,175
Net deferred loan origination fees	139	-162
Trading securities revenue	-174	-27
Purchases of trading securities	-38,082	-28,809
Proceeds from sale of trading securities	40,659	28,836
Repossessed real estate owned valuation write down	389	1,020
(Gain) loss on sale of repossessed real estate owned	-1,528	77
Loss on sale of repossessed assets other than real estate	-1	-2
Gain on sale of loans held for sale	-164	-76
Loans originated and held for sale	-7,431	-4,610
Proceeds from sale of loans held for sale	8,324	4,926
Gain on disposal of and or sale of fixed assets		-7
Gain on disposal of bank property held for sale	-41
Impairment on bank property held for sale	682	2,506
Deferred income taxes	452	3,724
Stock based compensation expense	830	187
Bank owned life insurance income	-593	-352
Net cash from changes in:
Net changes in accrued interest receivable, prepaid expenses, and other assets	173	-3,234
Net change in accrued interest payable, accrued expense, and other liabilities	3,804	-3,946
Net cash provided by (used by) operating activities	11,151	-4,376
Cash flows from investing activities:
Purchases of investment securities	-1,004
Purchases of mortgage backed securities	-22,306	-176,583
Proceeds from pay-downs of mortgage backed securities	20,554	17,187
Proceeds from sales of investment securities		19,583
Proceeds from sales of mortgage backed securities		41,233
Purchases of investment securities	-37,882
Proceeds from called investment securities	37,110
Proceeds from pay-downs of mortgage backed securities	8,868
Proceeds from sales of FHLB and FRB stock	208	1,055
Net (increase) decrease in loans	-28,103	22,898
Cash received from FDIC loss sharing agreements	3,654	5,299
Purchases of premises and equipment, net	-3,111	3,470
Proceeds from sale of repossessed real estate	11,589	6,762
Proceeds from sale of fixed assets		7
Proceeds from sale of bank property held for sale	555
Net cash from bank acquisitions		77,005
Net cash (used in) provided by investing activities	-9,868	17,916
Cash flows from financing activities:
Net increase in deposits	57,567	23,629
Net increase (decrease) in securities sold under agreement to repurchase	4,049	-1,917
Net increase in federal funds purchased	35,451	15,274
Net decrease in other borrowings		-5,708
Net decrease in payable to shareholders for acquisitions	-184
Stock options exercised, including tax benefit	217	909
Dividends paid	-455	-355
Net cash used in financing activities	96,645	31,832
Net increase in cash and cash equivalents	97,928	45,372
Cash and cash equivalents, beginning of period	158,413	174,889
Cash and cash equivalents, end of period	256,341	220,261
Transfer of loans to other real estate owned	3,264	3,432
Transfers of bank property to held for sale	970	4,647
Cash paid during the period for:
Interest	2,187	1,727
Income taxes	$170	$1,520

Nature_of_Operations_and_Basis

Nature of Operations and Basis of Presentation	3 Months Ended
Nature of Operations and Basis of Presentation	Mar. 31, 2015
Accounting Policies [Abstract]
Nature of Operations and Basis of Presentation	NOTE 1: Nature of Operations and basis of presentation
	The consolidated financial statements include the accounts of CenterState Banks, Inc. (the “Parent Company,” “Company” or “CSFL”), and its wholly owned subsidiary bank, CenterState Bank of Florida, N.A. (“CenterState”), and non bank subsidiary, R4ALL, Inc. The subsidiary bank operates through 58 full service banking locations in 20 counties throughout Florida, providing traditional deposit and lending products and services to its commercial and retail customers. R4ALL, Inc. is a separate non bank subsidiary of CSFL. Its purpose is to purchase troubled loans from the subsidiary bank and manage their eventual disposition.
	In addition, the Company also operates a correspondent banking and capital markets division. The division is integrated with and part of the subsidiary bank located in Winter Haven, Florida, although the majority of its bond salesmen, traders and operational personnel are physically housed in leased facilities located in Birmingham, Alabama, Atlanta, Georgia and Winston Salem, North Carolina. The business lines of this division are primarily divided into three inter-related revenue generating activities. The first, and largest, revenue generator is commissions earned on fixed income security sales, fees from hedging services, loan brokerage fees and consulting fees for services related to these activities. The second category includes correspondent bank deposits (i.e. federal funds purchased) and correspondent bank checking account deposits. The third revenue generating category includes fees from safe-keeping activities, bond accounting services for correspondents, asset/liability consulting related activities, international wires, and other clearing and corporate checking account services. The customer base includes small to medium size financial institutions primarily located in the Southeastern United States.
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial statements and with the instructions to Form 10-Q. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. These statements should be read in conjunction with the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2014. In the Company’s opinion, all adjustments, consisting primarily of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods have been made. The results of operations of the three month period ended March 31, 2015 are not necessarily indicative of the results expected for the full year.
	Some items in the prior period financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior period net income or shareholders’ equity.

Common_Stock_Outstanding_and_E

Common Stock Outstanding and Earnings Per Share Data	3 Months Ended
Common Stock Outstanding and Earnings Per Share Data	Mar. 31, 2015
Earnings Per Share [Abstract]
Common Stock Outstanding and Earnings Per Share Data	NOTE 2: Common stock outstanding and earnings per share data
	Basic earnings per share is based on the weighted average number of common shares outstanding during the periods. Diluted earnings per share includes the weighted average number of common shares outstanding during the periods and the further dilution from stock options using the treasury method. Average stock options outstanding that were anti dilutive during the three month periods ending March 31, 2015 and 2014 were 586,620 and 1,016,949, respectively. The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for the periods presented.

		Three months ended March 31,
		2015			2014
	Basic
	Net income available to common shareholders	$	9,148		$	1,053
	Less: Earnings allocated to participating securities		(51	)		-
	Net income allocated to common shareholders	$	9,097		$	1,053

	Weighted average common shares outstanding
	including participating securities		45,379,982			34,465,022
	Less: Participating securities		(252,042	)		-
	Average shares		45,127,940			34,465,022
	Basic earnings per common share	$	0.2		$	0.03

	Diluted
	Net income available to common shareholders	$	9,097		$	1,053
	Weighted average common shares outstanding for
	basic earnings per common share		45,127,940			34,465,022
	Add: Dilutive effects of stock based compensation awards		529,684			397,681
	Average shares and dilutive potential common shares		45,657,624			34,862,703
	Diluted earnings per common share	$	0.2		$	0.03

Fair_Value

Fair Value	3 Months Ended
Fair Value	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value	NOTE 3: Fair value
	Generally accepted accounting principles establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:
	Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.
	Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.
	Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing and asset or liability.
	The fair values of securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs).
	The fair values of trading securities are determined as follows: (1) for those securities that have traded prior to the date of the consolidated balance sheet but have not settled (date of sale) until after such date, the sales price is used as the fair value; and, (2) for those securities which have not traded as of the date of the consolidated balance sheet, the fair value was determined by broker price indications of similar or same securities.
	The fair value of derivatives is based on valuation models using observable market data as of the measurement date (Level 2). Assets and liabilities measured at fair value on a recurring basis are summarized below.
						Fair value measurements using
								Significant
						Quoted prices in		other				Significant
						active markets for		observable				unobservable
			Carrying			identical assets		inputs				inputs
			value			(Level 1)		(Level 2)				(Level 3)
	at March 31, 2015
	Assets:
	Trading securities		$	1,017		—		$	1,017			—
	Available for sale securities
	U.S. Treasury securities			1,006		—			1,006			—
	Mortgage backed securities			480,341		—			480,341			—
	Municipal securities			38,900		—			38,900			—
	Interest rate swap derivatives			10,467		—			10,467			—

	Liabilities:
	Interest rate swap derivatives			11,667		—			11,667			—

	at December 31, 2014
	Assets:
	Trading securities		$	3,420		—		$	3,420			—
	Available for sale securities
	U.S. government sponsored entities and agencies			3		—			3			—
	Mortgage backed securities			478,633		—			478,633			—
	Municipal securities			38,821		—			38,821			—
	Interest rate swap derivatives			6,800		—			6,800			—

	Liabilities:
	Interest rate swap derivatives			7,575		—			7,575			—

	The fair value of impaired loans with specific valuation allowance for loan losses and other real estate owned is based on recent real estate appraisals. For residential real estate impaired loans and other real estate owned, appraised values are based on the comparative sales approach. For commercial and commercial real estate impaired loans, and other real estate owned, appraisers may use either a single valuation approach or a combination of approaches such as comparative sales, cost or the income approach. A significant unobservable input in the income approach is the estimated income capitalization rate for a given piece of collateral. At March 31, 2015, the range of capitalization rates utilized to determine the fair value of the underlying collateral ranged from 8% to 11%. Adjustments to appraisals may be made by the appraiser to reflect local market conditions or other economic factors and may result in changes in the fair value of a given asset over time. As such, the fair value of impaired loans and other real estate owned are considered a Level 3 in the fair value hierarchy.
	Assets and liabilities measured at fair value on a non-recurring basis are summarized below.

						Fair value measurements using
								Significant
						Quoted prices in		other		Significant
						active markets for		observable		unobservable
			Carrying			identical assets		inputs		inputs
			value			(Level 1)		(Level 2)		(Level 3)
	at March 31, 2015
	Assets:
	Impaired loans
	Residential real estate		$	3,302		—		—		$	3,302
	Commercial real estate			4,360		—		—			4,360
	Land, land development and construction			1,228		—		—			1,228
	Commercial			380		—		—			380
	Consumer			98		—		—			98
	Other real estate owned
	Residential real estate			443		—		—			443
	Commercial real estate			3,185		—		—			3,185
	Land, land development and construction			4,856		—		—			4,856
	Bank property held for sale			2,449		—		—			2,449

	at December 31, 2014
	Assets:
	Impaired loans
Residential real estate		$	2,971		—		—		$	2,971
Commercial real estate			4,854		—		—			4,854
Land, land development and construction			1,731		—		—			1,731
Commercial			167		—		—			167
Consumer			102		—		—			102
Other real estate owned
Residential real estate			448		—		—			448
Commercial real estate			2,363		—		—			2,363
Land, land development and construction			2,240		—		—			2,240
Bank property held for sale			2,675		—		—			2,675

Impaired loans with specific valuation allowances and/or partial charge-offs had a recorded investment of $10,232 with a valuation allowance of $864, at March 31, 2015, and a recorded investment of $10,677, with a valuation allowance of $852, at December 31, 2014. The Company recorded a provision for loan loss expense of $120 on these loans during the three months period ending March 31, 2015. The Company recorded a provision for loan loss expense of $380 on these loans during the three months period ending March 31, 2014, respectively.

Other real estate owned had a decline in fair value of $389 and $1,020 during the three month periods ending March 31, 2015 and 2014, respectively. Changes in fair value were recorded directly to current earnings through non interest expense.

Bank property held for sale represents certain branch office buildings which the Company has closed and consolidated with other existing branches. The real estate was transferred out of the Bank Premises and Equipment category into bank property held for sale at the lower of amortized cost or fair value less estimated costs to sell. The fair values were based upon comparative sales data provided by real estate brokers. The Company recognized an impairment charge of $682 and $2,506 during the three month periods ending March 31, 2015 and 2014, respectively, related to bank properties held-for-sale.
Fair Value of Financial Instruments
The methods and assumptions, not previously presented, used to estimate fair value are described as follows:
Cash and Cash Equivalents: The carrying amounts of cash and cash equivalents approximate fair values and are classified as Level 1.
FHLB and FRB Stock: It is not practical to determine the fair value of FHLB and FRB stock due to restrictions placed on their transferability.
Investment securities held to maturity: The fair values of securities held to maturity are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs).
Loans held for sale: The fair value of loans held for sale is estimated based upon binding contracts from third party investors resulting in a Level 2 classification.
Loans, net: Fair values of loans, excluding loans held for sale, are estimated as follows: For variable rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values resulting in a Level 3 classification. Fair values for other loans are estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality resulting in a Level 3 classification. Impaired loans are valued as described previously. The methods utilized to estimate the fair value of loans do not necessarily represent an exit price.
FDIC Indemnification Asset: It is not practical to determine the fair value of the FDIC indemnification asset due to restrictions placed on its transferability.
Accrued Interest Receivable: The carrying amount of accrued interest receivable approximates fair value and is classified as Level 3.
Deposits: The fair values disclosed for demand deposits (e.g., interest and non-interest checking, savings, and money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amount) resulting in Level 1 classification. Fair values for fixed rate certificates of deposit are estimated using a discounted cash flows calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits resulting in a Level 2 classification.
Short-term Borrowings: The carrying amounts of federal funds purchased, borrowings under repurchase agreements, and other short-term borrowings, generally maturing within ninety days, approximate their fair values resulting in a Level 2 classification.
Corporate Debentures: The fair values of the Company’s corporate debentures are estimated using discounted cash flow analyses based on the current borrowing rates for similar types of borrowing arrangements resulting in a Level 3 classification.
Accrued Interest Payable: The carrying amount of accrued interest payable approximates fair value resulting in a Level 2 classification.
Off-balance Sheet Instruments: The fair value of off-balance-sheet items is not considered material.
The following table presents the carry amounts and estimated fair values of the Company’s financial instruments:


					Fair value measurements
at March 31, 2015		Carrying amount			Level 1				Level 2				Level 3		Total
Financial assets:
Cash and cash equivalents		$	256,341		$	256,341			$	-			$	-	$	256,341
Trading securities			1,017			-				1,017				-		1,017
Investment securities available for sale			520,247			-				520,247				-		520,247
Investment securities held to maturity			228,870			-				230,439				-		230,439
FHLB and FRB stock			14,011			-				-				-	n/a
Loans held for sale			522			-				522				-		522
Loans, less allowance for loan losses of $20,980			2,443,683			-				-				2,451,451		2,451,451
FDIC indemnification asset			41,594			-				-				-	n/a
Interest rate swap derivatives			10,467			-				10,467				-		10,467
Accrued interest receivable			9,275			-				-				9,275		9,275

Financial liabilities:
Deposits- without stated maturities		$	2,690,337		$	2,690,337			$	-			$	-	$	2,690,337
Deposits- with stated maturities			459,035			-				460,919				-		460,919
Securities sold under agreement to repurchase			31,071			-				31,071				-		31,071
Federal funds purchased			187,443			-				187,443				-		187,443
Corporate debentures			23,961			-				-				19,345		19,345
Interest rate swap derivatives			11,667			-				11,667				-		11,667
Accrued interest payable			293			-				293				-		293



					Fair value measurements
at December 31, 2014		Carrying amount			Level 1				Level 2				Level 3		Total
Financial assets:
Cash and cash equivalents		$	158,413		$	158,413			$	-			$	-	$	158,413
Trading securities			3,420		—					3,420			—			3,420
Investment securities available for sale			517,457		—					517,457			—			517,457
Investment securities held to maturity			237,362		—					238,431			—			238,431
FHLB and FRB stock			14,219		—				—				—		n/a
Loans held for sale			1,251		—					1,251			—			1,251
Loans, less allowance for loan losses of $19,898			2,409,627		—				—					2,418,405		2,418,405
FDIC indemnification asset			49,054		—				—				—		n/a
Interest rate swap derivatives			6,800		—					6,800			—			6,800
Accrued interest receivable			8,999		—				—					8,999		8,999

Financial liabilities:
Deposits- without stated maturities		$	2,604,228		$	2,604,228			$	-			$	-	$	2,604,228
Deposits- with stated maturities			487,812		—					491,999			—			491,999
Securities sold under agreement to repurchase			27,022		—					27,022			—			27,022
Federal funds purchased			151,992		—					151,992			—			151,992
Corporate debentures			23,917		—				—					19,722		19,722
Interest rate swap derivatives			7,575		—					7,575			—			7,575
Accrued interest payable			336		—					336			—			336

Reportable_Segments

Reportable Segments	3 Months Ended
Reportable Segments	Mar. 31, 2015
Segment Reporting [Abstract]
Reportable Segments	NOTE 4: Reportable segments
	The Company’s reportable segments represent the distinct product lines the Company offers and are viewed separately for strategic planning purposes by management. The table below is a reconciliation of the reportable segment revenues, expenses, and profit to the Company’s consolidated total for the three month periods ending March 31, 2015 and 2014.

		Three month period ending March 31, 2015
					Correspondent			Corporate
		Commercial			banking and			overhead
		and retail			capital markets			and			Elimination
		banking			division			administration			entries			Total
	Interest income	$	37,751		$	1,734		$	-		$	-		$	39,485
	Interest expense		(1,496	)		(132	)		(237	)		-			(1,865	)
	Net interest income (expense)		36,255			1,602			(237	)		-			37,620
	Provision for loan losses		(1,511	)		(131	)		-			-			(1,642	)
	Non interest income		2,281			6,800			-			-			9,081
	Non interest expense		(23,899	)		(5,595	)		(1,109	)		-			(30,603	)
	Net income (loss) before taxes		13,126			2,676			(1,346	)		-			14,456
	Income tax (provision) benefit		(4,792	)		(1,032	)		516			-			(5,308	)
	Net income (loss)	$	8,334		$	1,644		$	(830	)	$	-		$	9,148
	Total assets	$	3,573,573		$	305,667		$	493,374		$	(484,042	)	$	3,888,572

		Three month period ending March 31, 2014
					Correspondent			Corporate
		Commercial			banking and			overhead
		and retail			capital markets			and			Elimination
		banking			division			administration			entries			Total
	Interest income	$	29,070		$	712		$	-		-			$	29,782
	Interest expense		(1,361	)		(5	)		(223	)	-				(1,589	)
	Net interest income (expense)		27,709			707			(223	)	-				28,193
	Provision for loan losses		41			-			-		-				41
	Non interest income		1,829			3,931			-		-				5,760
	Non interest expense		(27,167	)		(4,378	)		(858	)	-				(32,403	)
	Net income before taxes		2,412			260			(1,081	)		-			1,591
	Income tax (provision) benefit		(849	)		(100	)		411		-				(538	)
	Net income (loss)	$	1,563		$	160		$	(670	)	-			$	1,053
	Total assets	$	2,835,871		$	164,599		$	363,107		$	(357,880	)	$	3,005,697

	Commercial and retail banking: The Company’s primary business is commercial and retail banking. Currently, the Company operates through its subsidiary bank and a non bank subsidiary, R4ALL, with 58 full service banking locations in 20 counties throughout Florida providing traditional deposit and lending products and services to its commercial and retail customers.
	Correspondent banking and capital markets division: Operating as a division of our subsidiary bank, its primary revenue generating activities are related to the capital markets division which includes commissions earned on fixed income security sales, fees from hedging services, loan brokerage fees and consulting fees for services related to these activities. Income generated related to the correspondent banking services includes spread income earned on correspondent bank deposits (i.e. federal funds purchased) and fees generated from safe-keeping activities, bond accounting services, asset/liability consulting services, international wires, clearing and corporate checking account services and other correspondent banking related services. The fees derived from the correspondent banking services are less volatile than those generated through the capital markets group. The customer base includes small to medium size financial institutions primarily located in Southeastern United States.
	Corporate overhead and administration: Corporate overhead and administration is comprised primarily of compensation and benefits for certain members of management, interest on parent company debt, office occupancy and depreciation of parent company facilities, certain merger related costs and other expenses.

Investment_Securities

Investment Securities	3 Months Ended
Investment Securities	Mar. 31, 2015
Investments Debt And Equity Securities [Abstract]
Investment Securities	NOTE 5: Investment Securities

	Available-for-Sale
	All of the mortgage backed securities listed below were issued by U.S. government sponsored entities and agencies, primarily Fannie Mae, Freddie Mac and Ginnie Mae, institutions which the government has affirmed its commitment to support. The fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:

			31-Mar-15
						Gross			Gross
			Amortized			Unrealized			Unrealized			Fair
			Cost			Gains			Losses			Value
	U.S. Treasury securities		$	1,004		$	2		$	---		$	1,006
	Mortgage backed securities			473,592			7,801			1,052			480,341
	Municipal securities			37,403			1,519			22			38,900
	Total available-for-sale		$	511,999		$	9,322		$	1,074		$	520,247


			31-Dec-14
						Gross			Gross
			Amortized			Unrealized			Unrealized			Fair
			Cost			Gains			Losses			Value
	Obligations of U.S. government sponsored entities and agencies		$	3		$ ---			$ ---			$	3
	Mortgage backed securities			473,396			6,897			1,660			478,633
	Municipal securities			37,460			1,412			51			38,821
	Total available-for-sale		$	510,859		$	8,309		$	1,711		$	517,457
	The cost of securities sold is determined using the specific identification method. The securities sold during the first quarter of 2014 consisted of the securities acquired through the Gulfstream Business Bank (“GSB”) acquisition. These acquired securities were marked to fair value and subsequently sold after the acquisition date, therefore no gain or loss was recognized from the sale of these securities. Sales of available for sale securities for the three months ended March 31, 2015 and 2014 were as follows:

	For the three months ended:		31-Mar-15			31-Mar-14
	Proceeds		$	-		$	60,816
	Gross gains			-			-
	Gross losses			-			-
	The tax provision related to these net realized gains was $0 and $0, respectively.
	The fair value of available for sale securities at March 31, 2015 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately.

						Amortized
	Investment securities available for sale:		Fair Value			Cost
	Due in one year or less		$	527		$	516
	Due after one year through five years			2,562			2,499
	Due after five years through ten years			17,292			16,622
	Due after ten years through thirty years			19,525			18,770
	Mortgage backed securities			480,341			473,592
	Total available-for-sale		$	520,247		$	511,999

	Available for sale securities pledged at March 31, 2015 and December 31, 2014 had a carrying amount (estimated fair value) of $134,044 and $139,297 respectively. These securities were pledged primarily to secure public deposits and repurchase agreements.
	At March 31, 2015 and December 31, 2014, there were no holdings of securities of any one issuer, other than mortgage backed securities issued by U.S. Government sponsored entities and agencies, in an amount greater than 10% of stockholders’ equity.
	The following tables show the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2015 and December 31, 2014.
			31-Mar-15
			Less than 12 months						12 months or more						Total
						Unrealized						Unrealized						Unrealized
			Fair Value			Losses			Fair Value			Losses			Fair Value			Losses
	Mortgage backed securities		$	47,040		$	91		$	61,245		$	961		$	108,285		$	1,052
	Municipal securities			2,155			22			-			-			2,155			22
	Total temporarily impaired
	available-for-sale securities		$	49,195		$	113		$	61,245		$	961		$	110,440		$	1,074


			31-Dec-14
			Less than 12 months						12 months or more						Total
						Unrealized						Unrealized						Unrealized
			Fair Value			Losses			Fair Value			Losses			Fair Value			Losses
	Mortgage backed securities		$	15,876		$	41		$	99,010		$	1,619		$	114,886		$	1,660
	Municipal securities			-			-			3,194			51			3,194			51
	Total temporarily impaired
	available-for-sale securities		$	15,876		$	41		$	102,204		$	1,670		$	118,080		$	1,711
	At March 31, 2015, 100% of the mortgage-backed securities held by the Company were issued by U.S. government-sponsored entities and agencies, primarily Fannie Mae, Freddie Mac, and Ginnie Mae, institutions which the government has affirmed its commitment to support. Because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and because the Company does not have the intent to sell these mortgage-backed securities and it is likely that it will not be required to sell the securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at March 31, 2015.
	Unrealized losses on municipal securities have not been recognized into income because the issuers bonds are of high quality, and because management does not intend to sell these investments or more likely than not will not be required to sell these investments before their anticipated recovery. The fair value is expected to recover as the securities approach maturity.
Held-to-Maturity
The following reflects the fair value of held to maturity securities and the related gross unrecognized gains and losses as of March 31, 2015 and December 31, 2014.

		31-Mar-15
					Gross			Gross
		Amortized			Unrecognized			Unrecognized			Fair
		Cost			Gains			Losses			Value
Obligations of U.S. government sponsored entities and agencies		$	42,779		$	159		$	-		$	42,938
Mortgage backed securities			152,458			1,028			1			153,485
Municipal securities			33,633			408			25			34,016
Total held-to-maturity		$	228,870		$	1,595		$	26		$	230,439

		31-Dec-14
					Gross			Gross
		Amortized			Unrecognized			Unrecognized			Fair
		Cost			Gains			Losses			Value
Obligations of U.S. government sponsored entities and agencies		$	49,793		$	122		$	-		$	49,915
Mortgage backed securities			161,727			654			-			162,381
Municipal securities			25,842			305			12			26,135
Total held to maturity		$	237,362		$	1,081		$	12		$	238,431

Held to maturity securities pledged at March 31, 2015 and December 31, 2014 had an estimated fair value of $57,042 and $51,531 respectively. These securities were pledged primarily to secure public deposits and repurchase agreements.
At March 31, 2015, there were no holdings of held to maturity securities of any one issuer in an amount greater than 10% of stockholders’ equity.
The fair value and amortized cost of held to maturity securities at March 31, 2015 by contractual maturity were as follows. Mortgage-backed securities are not due at a single maturity date and are shown separately.

					Amortized
Investment securities held to maturity		Fair Value			Cost
Due after five years through ten years		$	29,846		$	29,756
Due after ten years through thirty years			47,108			46,656
Mortgage backed securities			153,485			152,458
Total held-to-maturity		$	230,439		$	228,870

The following table shows the Company’s held to maturity investments’ gross unrecognized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrecognized loss position, at March 31, 2015 and December 31, 2014.

		31-Mar-15
		Less than 12 months						12 months or more						Total
					Unrecognized						Unrecognized						Unrecognized
		Fair Value			Losses			Fair Value			Losses			Fair Value			Losses
Mortgage backed securities		$	15,932		$	1		$	-		$	-		$	15,932		$	1
Municipal securities			3,566			25			-			-			3,566			25
Total temporarily impaired
held-to-maturity securities		$	19,498		$	26		$	-		$	-		$	19,498		$	26

		31-Dec-14
		Less than 12 months						12 months or more						Total
					Unrecognized						Unrecognized						Unrecognized
		Fair Value			Losses			Fair Value			Losses			Fair Value			Losses
Municipal securities		$	2,475		$	12		$	-		$	-			2,475			12
Total temporarily impaired
held-to-maturity securities		$	2,475		$	12		$	-		$	-		$	2,475		$	12

At March 31, 2015, 100% of the mortgage-backed securities held by the Company were issued by U.S. government-sponsored entities and agencies, primarily Fannie Mae, Freddie Mac, and Ginnie Mae, institutions which the government has affirmed its commitment to support. Because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and because the Company does not have the intent to sell these mortgage-backed securities and it is likely that it will not be required to sell the securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at March 31, 2015.
Unrealized losses on municipal securities have not been recognized into income because the issuers bonds are of high quality, and because management does not intend to sell these investments or more likely than not will not be required to sell these investments before their anticipated recovery. The fair value is expected to recover as the securities approach maturity.

Loans

Loans	3 Months Ended
Loans	Mar. 31, 2015
Receivables [Abstract]
Loans

	NOTE 6: Loans
	The following table sets forth information concerning the loan portfolio by collateral types as of the dates indicated.

			31-Mar-15				31-Dec-14
	Loans excluding PCI loans
	Real estate loans
	Residential		$	604,811			$	589,068
	Commercial			1,154,682				1,132,933
	Land, development and construction			85,186				79,002
	Total real estate			1,844,679				1,801,003
	Commercial			297,442				294,493
	Consumer and other loans			58,484				56,334
	Loans before unearned fees and deferred cost			2,200,605				2,151,830
	Net unearned fees and costs			790				929
	Total loans excluding PCI loans			2,201,395				2,152,759
	PCI loans (note 1)
	Real estate loans
	Residential			101,365				102,009
	Commercial			131,270				140,977
	Land, development and construction			24,294				24,032
	Total real estate			256,929				267,018
	Commercial			5,615				8,953
	Consumer and other loans			724				795
	Total PCI loans			263,268				276,766
	Total loans			2,464,663				2,429,525
	Allowance for loan losses for loans that are not PCI loans			(20,842	)			(19,384	)
	Allowance for loan losses for PCI loans			(138	)			(514	)
	Total loans, net of allowance for loan losses		$	2,443,683			$	2,409,627
	The following sets forth the covered FDIC loans included in the table above.

			31-Mar-15				31-Dec-14
	FDIC covered loans that are not PCI loans
	Real estate loans
	Residential		$	3,737			$	3,895
	Commercial			32,637				33,606
	Land, development and construction			1,002				866
	Total real estate			37,376				38,367
	Commercial			1,087				1,253
	Consumer and other loans			-				-
	FDIC covered loans, excluding PCI loans			38,463				39,620
	FDIC covered PCI loans (note 1)
	Real estate loans
	Residential			97,032				98,075
	Commercial			108,937				116,457
	Land, development and construction			14,987				15,395
	Total real estate			220,956				229,927
	Commercial			2,595				4,974
	Consumer and other loans			-				-
	Total FDIC covered PCI loans			223,551				234,901
	Total FDIC covered loans			262,014				274,521
	Allowance for loans losses for FDIC covered			(138	)			(514	)
	Total covered loans, net of allowance for loan losses		$	261,876			$	274,007

	note 1:	Purchased credit impaired (“PCI”) loans are being accounted for pursuant to ASC Topic 310-30.
	The table below set forth the activity in the allowance for loan losses for the periods presented.


	Three months ended March 31, 2015		Allowance for loan losses for loans that are not PCI loans				Allowance for loan losses on PCI loans				Total
	Balance at beginning of period		$	19,384			$	514			$	19,898
	Loans charged-off			(949	)			(77	)			(1,026	)
	Recoveries of loans previously charged-off			466				-				466
	Net charge-offs			(483	)			(77	)			(560	)
Provision (recovery) for loan losses			1,941				(299	)			1,642
Balance at end of period		$	20,842			$	138			$	20,980

Three months ended March 31, 2014
Balance at beginning of period		$	19,694			$	760			$	20,454
Loans charged-off			(1,160	)			-				(1,160	)
Recoveries of loans previously charged-off			843				-				843
Net charge-offs			(317	)			-				(317	)
(Recovery) provision for loan losses			(464	)			423				(41	)
Balance at end of period		$	18,913			$	1,183			$	20,096


The following tables present the activity in the allowance for loan losses by portfolio segment for the periods presented.

		Real Estate Loans
		Residential				Commercial				Land, develop., constr.				Comm. & industrial			Consumer & other			Total

Allowance for loan losses for loans that are not PCI loans:

Three months ended March 31, 2015
Beginning of the period		$	6,743			$	8,269			$	752			$	2,330		$	1,290		$	19,384
Charge-offs			(328	)			(60	)			(71	)			(278	)		(212	)		(949	)
Recoveries			314				45				1				46			60			466
Provision for loan losses			37				1,057				147				435			265			1,941
Balance at end of period		$	6,766			$	9,311			$	829			$	2,533		$	1,403		$	20,842

Three months ended March 31, 2014
Beginning of the period		$	8,785			$	6,441			$	3,069			$	510		$	889		$	19,694
Charge-offs			(687	)			(16	)			(77	)			(200	)		(180	)		(1,160	)
Recoveries			455				314				23				1			50			843
(Recovery) provision for loan losses			(741	)			599				(1,227	)			645			260			(464	)
Balance at end of period		$	7,812			$	7,338			$	1,788			$	956		$	1,019		$	18,913


		Real Estate Loans
		Residential				Commercial				Land, develop., constr.				Comm. & industrial			Consumer & other			Total

Allowance for loan losses for loans that are PCI loans:

Three months ended March 31, 2015
Beginning of the period		$	-			$	372			$	6			$	136		$	-		$	514
Charge-offs			-				(77	)			-				-			-			(77	)
Recoveries			-				-				-				-			-			-
(Recovery) provision for loan losses			-				(165	)			(2	)			(132	)		-			(299	)
Balance at end of period		$	-			$	130			$	4			$	4		$	-		$	138

Three months ended March 31, 2014
Beginning of the period		$	-			$	138			$	89			$	533		$	-		$	760
Charge-offs			-				-				-				-			-			-
Recoveries			-				-				-				-			-			-
Provision (recovery) for loan losses			-				485				-				(62	)		-			423
Balance at end of period		$	-			$	623			$	89			$	471		$	-		$	1,183




The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of March 31, 2015 and December 31, 2014. Accrued interest receivable and unearned loan fees and costs are not included in the recorded investment because they are not material.

		Real Estate Loans
As of March 31, 2015		Residential				Commercial				Land, develop., constr.				Comm. & industrial			Consumer & other			Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment		$	431			$	351			$	278			$	5		$	36		$	1,101
Collectively evaluated for impairment			6,335				8,960				551				2,528			1,367			19,741
Purchased credit impaired			-				130				4				4			-			138
Total ending allowance balance		$	6,766			$	9,441			$	833			$	2,537		$	1,403		$	20,980

Loans:
Individually evaluated for impairment		$	8,578			$	10,419			$	1,888			$	833		$	464		$	22,182
Collectively evaluated for impairment			596,233				1,144,263				83,298				296,609			58,020			2,178,423
Purchased credit impaired			101,365				131,270				24,294				5,615			724			263,268
Total ending loan balances		$	706,176			$	1,285,952			$	109,480			$	303,057		$	59,208		$	2,463,873



	Real Estate Loans
As of December 31, 2014		Residential				Commercial				Land, develop., constr.				Comm. & industrial			Consumer & other			Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment		$	419			$	403			$	272			$	4		$	17		$	1,115
Collectively evaluated for impairment			6,324				7,866				480				2,326			1,273			18,269
Purchased credit impaired			-				372				6				136			-			514
Total ending allowance balance		$	6,743			$	8,641			$	758			$	2,466		$	1,290		$	19,898

Loans:
Individually evaluated for impairment		$	9,980			$	10,902			$	2,748			$	1,365		$	255		$	25,250
Collectively evaluated for impairment			579,088				1,122,031				76,254				293,128			56,079			2,126,580
Purchased credit impaired			102,009				140,977				24,032				8,953			795			276,766
Total ending loan balance		$	691,077			$	1,273,910			$	103,034			$	303,446		$	57,129		$	2,428,596


Loans collectively evaluated for impairment reported at March 31, 2015 include loans acquired from First Southern Bank (“FSB”) on June 1, 2014 and from GSB on January 17, 2014 that are not PCI loans. These loans were performing loans recorded at estimated fair value at the acquisition date. The fair value adjustment for loans acquired from GSB at the acquisition date was approximately $7,680, or approximately 2.3% of the outstanding aggregate loan balances, and the fair value adjustment for loans acquired from FSB at the acquisition date was approximately $10,725, or approximately 2.0% of the outstanding aggregate loan balances.

As of the end of the current quarter, the Company has a 14 month history with the performing loans acquired from GSB. Management evaluated the performance of this group of loans over the period subsequent to the acquisition date and, based on this evaluation, has increased the probable incurred loss amount at March 31, 2015 to $1,944. Management considered the accretion of the credit discount, levels of and trends in non-performing loans, past due loans, adverse loan grade classification changes, net charge-offs and impaired loans in arriving at its estimate.

As of the end of the current quarter, the Company has a 10 month history with the performing loans acquired from FSB. The Company estimated the probable incurred losses in this group of loans and an initial general loan loss allowance of $1,052 was recorded at March 31, 2015. Management considered the accretion of the discount, levels of and trends in non-performing loans, past due loans, adverse loan classification changes, net charge-offs and impaired loans.



The table below summarizes impaired loan data for the periods presented.

		Mar. 31, 2015				31-Dec-14
Performing TDRs (these are not included in nonperforming loans ("NPLs"))		$	10,617			$	11,418
Nonperforming TDRs (these are included in NPLs)			4,049				3,648
Total TDRs (these are included in impaired loans)			14,666				15,066
Impaired loans that are not TDRs			7,516				10,184
Total impaired loans		$	22,182			$	25,250
In certain situations it has become more common to restructure or modify the terms of certain loans under certain conditions (i.e. troubled debt restructure or “TDRs”). In those circumstances it may be beneficial to restructure the terms of a loan and work with the borrower for the benefit of both parties, versus forcing the property into foreclosure and having to dispose of it in an unfavorable real estate market. When the terms of a loan have been modified, usually the monthly payment and/or interest rate is reduced for generally twelve to twenty-four months. Material principal amounts on any loan modifications have not been forgiven to date.
TDRs as of March 31, 2015 and December 31, 2014 quantified by loan type classified separately as accrual (performing loans) and non-accrual (non performing loans) are presented in the tables below.

As of March 31, 2015		Accruing				Non Accrual				Total
Real estate loans:
Residential		$	6,708			$	1,597			$	8,305
Commercial			2,309				2,004				4,313
Land, development, construction			515				235				750
Total real estate loans			9,532				3,836				13,368
Commercial			672				161				833
Consumer and other			413				52				465
Total TDRs		$	10,617			$	4,049			$	14,666


As of December 31, 2014		Accruing				Non-Accrual				Total
Real estate loans:
Residential		$	7,201			$	1,523			$	8,724
Commercial			2,762				1,794				4,556
Land, development, construction			547				241				788
Total real estate loans			10,510				3,558				14,068
Commercial			706				37				743
Consumer and other			202				53				255
Total TDRs		$	11,418			$	3,648			$	15,066

Our policy is to return non accrual TDR loans to accrual status when all the principal and interest amounts contractually due, pursuant to its modified terms, are brought current and future payments are reasonably assured. Our policy also considers the payment history of the borrower, but is not dependent upon a specific number of payments. The Company recorded a provision for loan loss expense of $94 and partial charge offs of $63 on the TDR loans described above during the three month period ending March 31, 2015.
Loans are modified to minimize loan losses when we believe the modification will improve the borrower’s financial condition and ability to repay the loan. We typically do not forgive principal. We generally either reduce interest rates or decrease monthly payments for a temporary period of time and those reductions of cash flows are capitalized into the loan balance. We may also extend maturities, convert balloon loans to longer term amortizing loans, or vice versa, or change interest rates between variable and fixed rate. Each borrower and situation is unique and we try to accommodate the borrower and minimize the Company’s potential losses. Approximately 72% of our TDRs are current pursuant to their modified terms, and $4,049, or approximately 28% of our total TDRs are not performing pursuant to their modified terms. There does not appear to be any significant difference in success rates with one type of concession versus another.

The following table presents loans by class modified and for which there was a payment default within twelve months following the modification during the periods ending March 31, 2015 and 2014.

		Period ending								Period ending
		31-Mar-15								31-Mar-14
		Number				Recorded				Number				Recorded
		of loans				investment				of loans				investment
Residential			3			$	529				-			$	-
Commercial real estate			3				467				4				1,319
Land, development, construction			2				235				-				-
Commercial and Industrial			1				43				2				33
Consumer and other			2				34				-				-
Total			11			$	1,308				6			$	1,352

The Company recorded a provision for loan loss expense of $40 and $15, and partial charge offs of $31 and $21 on TDR loans that subsequently defaulted as described above during the three month periods ending March 31, 2015 and 2014, respectively.
The following tables present loans individually evaluated for impairment by class of loans as of March 31, 2015 and December 31, 2014, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30. The recorded investment is less than the unpaid principal balance due to partial charge-offs.

As of March 31, 2015		Unpaid principal balance				Recorded investment				Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate		$	5,627			$	5,481			$	-
Commercial real estate			8,812				8,629				-
Land, development, construction			1,244				654				-
Commercial and industrial			595				586				-
Consumer, other			159				159				-

With an allowance recorded:
Residential real estate			3,258				3,097				431
Commercial real estate			1,997				1,790				351
Land, development, construction			1,292				1,234				278
Commercial and industrial			297				247				5
Consumer, other			318				305				36
Total		$	23,599			$	22,182			$	1,101

As of December 31, 2014		Unpaid principal balance				Recorded investment				Allowance for loan losses allocated
With no related allowance recorded:
Residential real estate		$	6,797			$	6,672			$	-
Commercial real estate			8,208				8,059				-
Land, development, construction			2,234				1,606				-
Commercial and industrial			1,132				1,129				-
Consumer, other			-				-				-

With an allowance recorded:
Residential real estate			3,451				3,308				419
Commercial real estate			3,024				2,843				403
Land, development, construction			1,187				1,142				272
Commercial and industrial			283				236				4
Consumer, other			267				255				17
Total		$	26,583			$	25,250			$	1,115



Three month period ending March 31, 2015		Average of impaired loans				Interest income recognized during impairment				Cash basis interest income recognized
Real estate loans:
Residential		$	9,279			$	63			$	-
Commercial			10,661				63				-
Land, development, construction			2,317				6				-
Total real estate loans			22,257				132				-

Commercial and industrial			1,099				8				-
Consumer and other loans			360				5				-
Total		$	23,716			$	145			$	-



Three month period ending March 31, 2014		Average of impaired loans				Interest income recognized during impairment				Cash basis interest income recognized
Real estate loans:
Residential		$	9,078			$	77			$	-
Commercial			12,625				28				-
Land, development, construction			1,383				9				-
Total real estate loans			23,086				114				-

Commercial and industrial			1,918				21				-
Consumer and other loans			328				3				-
Total		$	25,332			$	138			$	-


Nonperforming loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30.

Nonperforming loans were as follows:		Mar. 31, 2015				31-Dec-14
Non accrual loans		$	26,857			$	25,595
Loans past due over 90 days and still accruing interest			-				-
Total non performing loans		$	26,857			$	25,595

The following table presents the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans as of March 31, 2015 and December 31, 2014, excluding purchased credit impaired loans:

As of March 31, 2015		Nonaccrual				Loans past due over 90 days still accruing
Residential real estate		$	12,836			$	-
Commercial real estate			9,737				-
Land, development, construction			1,816				-
Commercial			2,190				-
Consumer, other			278				-
Total		$	26,857			$	-

As of December 31, 2014		Nonaccrual				Loans past due over 90 days still accruing
Residential real estate		$	11,901			$	-
Commercial real estate			8,470				-
Land, development, construction			2,374				-
Commercial			2,475				-
Consumer, other			375				-
Total		$	25,595			$	-

The following table presents the aging of the recorded investment in past due loans as of March 31, 2015 and December 31, 2014, excluding purchased credit impaired loans:

										Accruing Loans
		Total				30 - 59 days past due				60 - 89 days past due				Greater than 90 days past due			Total Past Due			Loans Not Past Due			Nonaccrual Loans
As of March 31, 2015
Residential real estate		$	604,811			$	2,570			$	949			$	-		$	3,519		$	588,456		$	12,836
Commercial real estate			1,154,682				3,861				2,227				-			6,088			1,138,857			9,737
Land/dev/construction			85,186				236				508				-			744			82,626			1,816
Commercial			297,442				613				2,207				-			2,820			292,432			2,190
Consumer			58,484				194				137				-			331			57,875			278
		$	2,200,605			$	7,474			$	6,028			$	-		$	13,502		$	2,160,246		$	26,857


										Accruing Loans
		Total				30 - 59 days past due				60 - 89 days past due				Greater than 90 days past due			Total Past Due			Loans Not Past Due			Nonaccrual Loans
As of December 31, 2014
Residential real estate		$	589,068			$	2,162			$	1,451			$	-		$	3,613		$	573,554		$	11,901
Commercial real estate			1,132,933				1,840				3,394				-			5,234			1,119,229			8,470
Land/dev/construction			79,002				378				404				-			782			75,846			2,374
Commercial			294,493				1,427				1,492				-			2,919			289,099			2,475
Consumer			56,334				411				149				-			560			55,399			375
		$	2,151,830			$	6,218			$	6,890			$	-		$	13,108		$	2,113,127		$	25,595
Credit Quality Indicators:
The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis is performed on at least an annual basis. The Company uses the following definitions for risk ratings:
Special Mention: Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date.
Substandard: Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.
Doubtful: Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.
Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans. As of March 31, 2015 and December 31, 2014, and based on the most recent analysis performed, the risk category of loans by class of loans, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30:

						As of March 31, 2015
Loan Category		Pass				Special Mention				Substandard				Doubtful
Residential real estate		$	575,010			$	7,085			$	22,716			$	-
Commercial real estate			1,088,608				31,892				34,182				-
Land/dev/construction			73,960				7,703				3,523				-
Commercial			290,747				3,919				2,776				-
Consumer			57,707				272				505				-
Total		$	2,086,032			$	50,871			$	63,702			$	-


						As of December 31, 2014
Loan Category		Pass				Special Mention				Substandard				Doubtful
Residential real estate		$	558,312			$	7,053			$	23,703			$ -
Commercial real estate			1,063,979				34,953				34,001			-
Land/dev/construction			65,216				9,731				4,055			-
Commercial			285,549				4,419				4,525			-
Consumer			55,590				278				466			-
Total		$	2,028,646			$	56,434			$	66,750			$	-
The Company considers the performance of the loan portfolio and its impact on the allowance for loan losses. For residential and consumer loan classes, the Company also evaluates credit quality based on the aging status of the loan, which was previously presented, and by payment activity. The following table presents the recorded investment in residential and consumer loans, excluding purchased credit impaired loans, based on payment activity as of March 31, 2015 and December 31, 2014:

As of March 31, 2015		Residential				Consumer
Performing		$	591,975				$	58,206
Nonperforming			12,836					278
Total		$	604,811				$	58,484

As of December 31, 2014		Residential				Consumer
Performing		$	577,167				$	55,959
Nonperforming			11,901					375
Total		$	589,068				$	56,334


Purchased Credit Impaired (“PCI”) loans:
Income is recognized on PCI loans pursuant to ASC Topic 310-30. A portion of the fair value discount has been ascribed as an accretable yield that is accreted into interest income over the estimated remaining life of the loans. The remaining non-accretable difference represents cash flows not expected to be collected.
The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans as of March 31, 2015 and December 31, 2014. Contractually required principal and interest payments have been adjusted for estimated prepayments.

		Mar. 31, 2015				Dec. 31, 2014
Contractually required principal and interest		$	411,235			$	460,836
Non-accretable difference			(36,309	)			(68,757	)
Cash flows expected to be collected			374,926				392,079
Accretable yield			(111,658	)			(115,313	)
Carrying value of acquired loans			263,268				276,766
Allowance for loan losses			(138	)			(514	)
Carrying value less allowance for loan losses		$	263,130			$	276,252
We adjusted our estimates of future expected losses, cash flows and renewal assumptions during the current quarter. These adjustments resulted in an increase in expected cash flows and accretable yield, and a decrease in the non-accretable difference. We reclassified approximately $6,057 and $7,294 from non-accretable difference to accretable yield during the three month periods ending March 31, 2015 and 2014 to reflect our adjusted estimates of future expected cash flows. The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three month periods ending March 31, 2015 and 2014.


Activity during the						Effect of				income				all other
three month period ending March 31, 2015		31-Dec-14				acquisitions				accretion				adjustments			31-Mar-15
Contractually required principal and interest		$	460,836			$	-			$	-			$	(49,601	)	$	411,235
Non-accretable difference			(68,757	)			-				-				32,448			(36,309	)
Cash flows expected to be collected			392,079				-				-				(17,153	)		374,926
Accretable yield			(115,313	)			-				9,930				(6,275	)		(111,658	)
Carry value of acquired loans		$	276,766			$	-			$	9,930			$	(23,428	)	$	263,268

Activity during the						Effect of				income				all other
three month period ending March 31, 2014		31-Dec-13				acquisitions				accretion				adjustments			31-Mar-14
Contractually required principal and interest		$	389,537			$	48,289			$	-			$	(23,441	)	$	414,385
Non-accretable difference			(55,304	)			(11,766	)			-				11,008			(56,062	)
Cash flows expected to be collected			334,233				36,523				-				(12,433	)		358,323
Accretable yield			(102,812	)			(6,455	)			8,231				(6,487	)		(107,523	)
Carry value of acquired loans		$	231,421			$	30,068			$	8,231			$	(18,920	)	$	250,800

FDIC_Indemnification_Asset

FDIC Indemnification Asset	3 Months Ended
FDIC Indemnification Asset	Mar. 31, 2015
Fdic Loss Share Indemnification Asset [Abstract]
FDIC Indemnification Asset	NOTE 7: FDIC indemnification asset
	The FDIC indemnification asset represents the estimated amounts due from the FDIC pursuant to the Loss Share Agreements related to the acquisition of the three failed banks acquired in 2010, the acquisition of two failed banks in 2012 and the assumption of Loss Share Agreements of two failed banks assumed by the Company pursuant to its acquisition of FSB in June 2014. The activity in the FDIC loss share indemnification asset is as follows:

		Three month period ended Mar 31, 2015			Twelve month period ended Dec 31, 2014
	Beginning of the year	$	49,054		$	73,877
	Effect of acquisition		-			2,636
	Amortization, net		(4,316	)		(20,664	)
	Indemnification revenue		906			3,098
	Indemnification of foreclosure expense		(157	)		237
	Proceeds from FDIC		(3,654	)		(10,014	)
	Impairment (recovery) of loan pool		(239	)		(116	)
	Period end balance	$	41,594		$	49,054

	The FDIC agreements allow for the recovery of some payments made for loss share reimbursements under certain conditions based on the actual performance of the portfolios acquired. This true-up payment is estimated and accrued for as part of the overall FDIC indemnification asset analysis and is reflected as a separate liability. The accrual for this liability is reflected as additional amortization income or expense in noninterest income. The activity in the true-up payment liability is as follows:

		Three month period ended Mar 31, 2015			Twelve month period ended Dec 31, 2014
	Beginning of the year	$	1,205		$	444
	Effect of acquisition		-			682
	True-up liability accrual		34			79
	Period end balance	$	1,239		$	1,205

	Impairment of loan pools
	When a loan pool (with loss share) is impaired, the impairment expense is included in provision for loan losses, and the percentage of that loss to be reimbursed by the FDIC is recognized as income from FDIC reimbursement, and included in this line item. During the three month period ended March 31, 2015, there was a recovery of a prior period impairment, as such, the estimated amount of impairment decreased, which resulted in a reduction of indemnification income of $239.
	Indemnification revenue
	Indemnification revenue represents the percentage of the cost incurred that is reimbursable by the FDIC pursuant to the related Loss Share Agreement for expenses related to the repossession process and losses incurred on the sale of OREO, or writedown of OREO values to current fair value.
	Amortization, net
	On the date of an FDIC acquisition, the Company estimates the amount and the timing of expected future losses that will be covered by the FDIC loss sharing agreements. The FDIC indemnification asset is initially recorded as the discounted value of the reimbursement of losses from the FDIC. Discount accretion is recognized over the estimated period of losses. The Company also updates its estimate of future losses and the timing of the losses each quarter. To the extent management estimates that future losses are less than initial estimate of future losses, management adjusts its estimates of future expected reimbursements and any decrease in the expected future reimbursements is amortized over the shorter of the loss share period or the life of the related loan by amortization in this line item. Based upon the most recent estimate of future losses, the Company expects less reimbursements from the FDIC and is amortizing the estimated reduction as described in the previous sentence.
	Indemnification of foreclosure expense
	Indemnification of foreclosure expense represents the percentage of foreclosure related expenses incurred and reimbursable from the FDIC. Foreclosure expense is included in non interest expense. The amount of the reimbursable portion of the expense reduces foreclosure expense included in non interest expense.

Subsequent_Events

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	NOTE 8: Subsequent Events
	On April 8, 2015, the Company entered into a Loan Agreement (the “Loan Agreement”) with NexBank SSB (the “Lender”) providing for revolving loans of up to an aggregate principal amount of $25,000. Borrowings under the Loan Agreement accrue interest at 90 day LIBOR plus 3.5% per annum. In addition, the Company must pay commitment fees quarterly in arrears on the daily average amount of the unused portion of the revolving loan amount for the period from December 1, 2015 up to and including the maturity date, at the rate of 0.25% per annum. The maturity date of the Loan Agreement is April 1, 2018, at which time all outstanding amounts under the Loan Agreement will become due and payable. In connection with entering into the Loan Agreement, the Company issued to the Lender a Revolving Promissory Note dated as of April 8, 2015 (the “Promissory Note”). Refer to Form 8-K filed on April 10, 2015, incorporated herein by reference, for a description and terms of the Promissory Note.
	On April 16, 2015, CenterState entered into a purchase and assumption agreement with SouthBank, a Federal Savings Bank, and its parent company, Commonwealth Savingshares Corporation, whereby CenterState agreed to purchase a banking branch office building in Palm Beach Garden, Florida, for an appraised value of approximately $1,950 and assume deposit liabilities of approximately $18,500. CenterState also agreed to pay a $100 premium for the deposits. CenterState will not purchase any loans from SouthBank. The transaction is expected to close during the third quarter of 2015, subject to ordinary and customary regulatory approvals. The Company plans to consolidate two of its nearby existing branches in leased facilities into this building, which management deems a more desirable location.

Recently_Issued_Accounting_Sta

Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2015
Accounting Changes And Error Corrections [Abstract]
Recently Issued Accounting Standards

Common_Stock_Outstanding_and_E1

Common Stock Outstanding and Earnings Per Share Data (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Share Computations	The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for the periods presented.

		Three months ended March 31,
		2015			2014
	Basic
	Net income available to common shareholders	$	9,148		$	1,053
	Less: Earnings allocated to participating securities		(51	)		-
	Net income allocated to common shareholders	$	9,097		$	1,053

	Weighted average common shares outstanding
	including participating securities		45,379,982			34,465,022
	Less: Participating securities		(252,042	)		-
	Average shares		45,127,940			34,465,022
	Basic earnings per common share	$	0.2		$	0.03

	Diluted
	Net income available to common shareholders	$	9,097		$	1,053
	Weighted average common shares outstanding for
	basic earnings per common share		45,127,940			34,465,022
	Add: Dilutive effects of stock based compensation awards		529,684			397,681
	Average shares and dilutive potential common shares		45,657,624			34,862,703
	Diluted earnings per common share	$	0.2		$	0.03

Fair_Value_Tables

Fair Value (Tables)	3 Months Ended
Fair Value (Tables)	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The fair value of derivatives is based on valuation models using observable market data as of the measurement date (Level 2). Assets and liabilities measured at fair value on a recurring basis are summarized below.
				Fair value measurements using
						Significant
				Quoted prices in		other				Significant
				active markets for		observable				unobservable
		Carrying		identical assets		inputs				inputs
		value		(Level 1)		(Level 2)				(Level 3)
	at March 31, 2015
	Assets:
	Trading securities	$	1,017	—		$	1,017			—
	Available for sale securities
	U.S. Treasury securities		1,006	—			1,006			—
	Mortgage backed securities		480,341	—			480,341			—
	Municipal securities		38,900	—			38,900			—
	Interest rate swap derivatives		10,467	—			10,467			—

	Liabilities:
	Interest rate swap derivatives		11,667	—			11,667			—

	at December 31, 2014
	Assets:
	Trading securities	$	3,420	—		$	3,420			—
	Available for sale securities
	U.S. government sponsored entities and agencies		3	—			3			—
	Mortgage backed securities		478,633	—			478,633			—
	Municipal securities		38,821	—			38,821			—
	Interest rate swap derivatives		6,800	—			6,800			—

	Liabilities:
	Interest rate swap derivatives		7,575	—			7,575			—

Assets and Liabilities Measured at Fair Value on Non-Recurring Basis	Assets and liabilities measured at fair value on a non-recurring basis are summarized below.

				Fair value measurements using
						Significant
				Quoted prices in		other		Significant
				active markets for		observable		unobservable
		Carrying		identical assets		inputs		inputs
		value		(Level 1)		(Level 2)		(Level 3)
	at March 31, 2015
	Assets:
	Impaired loans
	Residential real estate	$	3,302	—		—		$	3,302
	Commercial real estate		4,360	—		—			4,360
	Land, land development and construction		1,228	—		—			1,228
	Commercial		380	—		—			380
	Consumer		98	—		—			98
	Other real estate owned
	Residential real estate		443	—		—			443
	Commercial real estate		3,185	—		—			3,185
	Land, land development and construction		4,856	—		—			4,856
	Bank property held for sale		2,449	—		—			2,449

	at December 31, 2014
	Assets:
	Impaired loans
	Residential real estate	$	2,971	—		—		$	2,971
	Commercial real estate		4,854	—		—			4,854
	Land, land development and construction		1,731	—		—			1,731
	Commercial		167	—		—			167
	Consumer		102	—		—			102
	Other real estate owned
	Residential real estate		448	—		—			448
	Commercial real estate		2,363	—		—			2,363
	Land, land development and construction		2,240	—		—			2,240
	Bank property held for sale		2,675	—		—			2,675

Carrying Amounts and Estimated Fair Values of Company's Financial Instruments	The following table presents the carry amounts and estimated fair values of the Company’s financial instruments:


				Fair value measurements
	at March 31, 2015	Carrying amount		Level 1				Level 2			Level 3		Total
	Financial assets:
	Cash and cash equivalents	$	256,341	$	256,341			$	-		$	-	$	256,341
	Trading securities		1,017		-				1,017			-		1,017
	Investment securities available for sale		520,247		-				520,247			-		520,247
	Investment securities held to maturity		228,870		-				230,439			-		230,439
	FHLB and FRB stock		14,011		-				-			-	n/a
	Loans held for sale		522		-				522			-		522
	Loans, less allowance for loan losses of $20,980		2,443,683		-				-			2,451,451		2,451,451
	FDIC indemnification asset		41,594		-				-			-	n/a
	Interest rate swap derivatives		10,467		-				10,467			-		10,467
	Accrued interest receivable		9,275		-				-			9,275		9,275

	Financial liabilities:
	Deposits- without stated maturities	$	2,690,337	$	2,690,337			$	-		$	-	$	2,690,337
	Deposits- with stated maturities		459,035		-				460,919			-		460,919
	Securities sold under agreement to repurchase		31,071		-				31,071			-		31,071
	Federal funds purchased		187,443		-				187,443			-		187,443
	Corporate debentures		23,961		-				-			19,345		19,345
	Interest rate swap derivatives		11,667		-				11,667			-		11,667
	Accrued interest payable		293		-				293			-		293



				Fair value measurements
	at December 31, 2014	Carrying amount		Level 1				Level 2			Level 3		Total
	Financial assets:
	Cash and cash equivalents	$	158,413	$	158,413			$	-		$	-	$	158,413
	Trading securities		3,420	—					3,420		—			3,420
	Investment securities available for sale		517,457	—					517,457		—			517,457
	Investment securities held to maturity		237,362	—					238,431		—			238,431
	FHLB and FRB stock		14,219	—				—			—		n/a
	Loans held for sale		1,251	—					1,251		—			1,251
	Loans, less allowance for loan losses of $19,898		2,409,627	—				—				2,418,405		2,418,405
	FDIC indemnification asset		49,054	—				—			—		n/a
	Interest rate swap derivatives		6,800	—					6,800		—			6,800
	Accrued interest receivable		8,999	—				—				8,999		8,999

	Financial liabilities:
	Deposits- without stated maturities	$	2,604,228	$	2,604,228			$	-		$	-	$	2,604,228
	Deposits- with stated maturities		487,812	—					491,999		—			491,999
	Securities sold under agreement to repurchase		27,022	—					27,022		—			27,022
	Federal funds purchased		151,992	—					151,992		—			151,992
	Corporate debentures		23,917	—				—				19,722		19,722
	Interest rate swap derivatives		7,575	—					7,575		—			7,575
	Accrued interest payable		336	—					336		—			336

Reportable_Segments_Tables

Reportable Segments (Tables)	3 Months Ended
Reportable Segments (Tables)	Mar. 31, 2015
Segment Reporting [Abstract]
Reconciliation of Reportable Segment Revenues, Expenses and Profit	The table below is a reconciliation of the reportable segment revenues, expenses, and profit to the Company’s consolidated total for the three month periods ending March 31, 2015 and 2014.

		Three month period ending March 31, 2015
					Correspondent			Corporate
		Commercial			banking and			overhead
		and retail			capital markets			and			Elimination
		banking			division			administration			entries			Total
	Interest income	$	37,751		$	1,734		$	-		$	-		$	39,485
	Interest expense		(1,496	)		(132	)		(237	)		-			(1,865	)
	Net interest income (expense)		36,255			1,602			(237	)		-			37,620
	Provision for loan losses		(1,511	)		(131	)		-			-			(1,642	)
	Non interest income		2,281			6,800			-			-			9,081
	Non interest expense		(23,899	)		(5,595	)		(1,109	)		-			(30,603	)
	Net income (loss) before taxes		13,126			2,676			(1,346	)		-			14,456
	Income tax (provision) benefit		(4,792	)		(1,032	)		516			-			(5,308	)
	Net income (loss)	$	8,334		$	1,644		$	(830	)	$	-		$	9,148
	Total assets	$	3,573,573		$	305,667		$	493,374		$	(484,042	)	$	3,888,572

		Three month period ending March 31, 2014
					Correspondent			Corporate
		Commercial			banking and			overhead
		and retail			capital markets			and			Elimination
		banking			division			administration			entries			Total
	Interest income	$	29,070		$	712		$	-		-			$	29,782
	Interest expense		(1,361	)		(5	)		(223	)	-				(1,589	)
	Net interest income (expense)		27,709			707			(223	)	-				28,193
	Provision for loan losses		41			-			-		-				41
	Non interest income		1,829			3,931			-		-				5,760
	Non interest expense		(27,167	)		(4,378	)		(858	)	-				(32,403	)
	Net income before taxes		2,412			260			(1,081	)		-			1,591
	Income tax (provision) benefit		(849	)		(100	)		411		-				(538	)
	Net income (loss)	$	1,563		$	160		$	(670	)	-			$	1,053
	Total assets	$	2,835,871		$	164,599		$	363,107		$	(357,880	)	$	3,005,697

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
Investment Securities (Tables)	Mar. 31, 2015
Fair Value of Available for Sale Securities and Related Gross Unrealized Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss)	The fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:
		31-Mar-15
				Gross		Gross
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gains		Losses		Value
	U.S. Treasury securities	$	1,004	$	2	$	---	$	1,006
	Mortgage backed securities		473,592		7,801		1,052		480,341
	Municipal securities		37,403		1,519		22		38,900
	Total available-for-sale	$	511,999	$	9,322	$	1,074	$	520,247


		31-Dec-14
				Gross		Gross
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gains		Losses		Value
	Obligations of U.S. government sponsored entities and agencies	$	3	$ ---		$ ---		$	3
	Mortgage backed securities		473,396		6,897		1,660		478,633
	Municipal securities		37,460		1,412		51		38,821
	Total available-for-sale	$	510,859	$	8,309	$	1,711	$	517,457

Schedule of Sales of Available for Sale Securities	Sales of available for sale securities for the three months ended March 31, 2015 and 2014 were as follows:
	For the three months ended:	31-Mar-15		31-Mar-14
	Proceeds	$	-	$	60,816
	Gross gains		-		-
	Gross losses		-		-

Fair Value of Held to Maturity Securities and Related Gross Unrecognized Gains and Losses	The following reflects the fair value of held to maturity securities and the related gross unrecognized gains and losses as of March 31, 2015 and December 31, 2014.

		31-Mar-15
				Gross		Gross
		Amortized		Unrecognized		Unrecognized		Fair
		Cost		Gains		Losses		Value
	Obligations of U.S. government sponsored entities and agencies	$	42,779	$	159	$	-	$	42,938
	Mortgage backed securities		152,458		1,028		1		153,485
	Municipal securities		33,633		408		25		34,016
	Total held-to-maturity	$	228,870	$	1,595	$	26	$	230,439

		31-Dec-14
				Gross		Gross
		Amortized		Unrecognized		Unrecognized		Fair
		Cost		Gains		Losses		Value
	Obligations of U.S. government sponsored entities and agencies	$	49,793	$	122	$	-	$	49,915
	Mortgage backed securities		161,727		654		-		162,381
	Municipal securities		25,842		305		12		26,135
	Total held to maturity	$	237,362	$	1,081	$	12	$	238,431

Available-for-sale Securities [Member]
Fair Value and Amortized Cost of Investment Securities by Contractual Maturity	The fair value of available for sale securities at March 31, 2015 by contractual maturity were as follows. Securities not due at a single maturity date, primarily mortgage-backed securities, are shown separately.

				Amortized
	Investment securities available for sale:	Fair Value		Cost
	Due in one year or less	$	527	$	516
	Due after one year through five years		2,562		2,499
	Due after five years through ten years		17,292		16,622
	Due after ten years through thirty years		19,525		18,770
	Mortgage backed securities		480,341		473,592
	Total available-for-sale	$	520,247	$	511,999

Investments Gross Unrealized Losses and Fair Value	The following tables show the Company’s available for sale investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2015 and December 31, 2014.
		31-Mar-15
		Less than 12 months				12 months or more				Total
				Unrealized				Unrealized				Unrealized
		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	Mortgage backed securities	$	47,040	$	91	$	61,245	$	961	$	108,285	$	1,052
	Municipal securities		2,155		22		-		-		2,155		22
	Total temporarily impaired
	available-for-sale securities	$	49,195	$	113	$	61,245	$	961	$	110,440	$	1,074


		31-Dec-14
		Less than 12 months				12 months or more				Total
				Unrealized				Unrealized				Unrealized
		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	Mortgage backed securities	$	15,876	$	41	$	99,010	$	1,619	$	114,886	$	1,660
	Municipal securities		-		-		3,194		51		3,194		51
	Total temporarily impaired
	available-for-sale securities	$	15,876	$	41	$	102,204	$	1,670	$	118,080	$	1,711

Held-to-maturity Securities [Member]
Fair Value and Amortized Cost of Investment Securities by Contractual Maturity	The fair value and amortized cost of held to maturity securities at March 31, 2015 by contractual maturity were as follows. Mortgage-backed securities are not due at a single maturity date and are shown separately.

				Amortized
	Investment securities held to maturity	Fair Value		Cost
	Due after five years through ten years	$	29,846	$	29,756
	Due after ten years through thirty years		47,108		46,656
	Mortgage backed securities		153,485		152,458
	Total held-to-maturity	$	230,439	$	228,870

Investments Gross Unrealized Losses and Fair Value	The following table shows the Company’s held to maturity investments’ gross unrecognized losses and fair value, aggregated by investment category and length of time the individual securities have been in a continuous unrecognized loss position, at March 31, 2015 and December 31, 2014.

		31-Mar-15
		Less than 12 months				12 months or more				Total
				Unrecognized				Unrecognized				Unrecognized
		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	Mortgage backed securities	$	15,932	$	1	$	-	$	-	$	15,932	$	1
	Municipal securities		3,566		25		-		-		3,566		25
	Total temporarily impaired
	held-to-maturity securities	$	19,498	$	26	$	-	$	-	$	19,498	$	26

		31-Dec-14
		Less than 12 months				12 months or more				Total
				Unrecognized				Unrecognized				Unrecognized
		Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
	Municipal securities	$	2,475	$	12	$	-	$	-		2,475		12
	Total temporarily impaired
	held-to-maturity securities	$	2,475	$	12	$	-	$	-	$	2,475	$	12

Loans_Tables

Loans (Tables)	3 Months Ended
Loans (Tables)	Mar. 31, 2015
Receivables [Abstract]
Summary of Information Concerning Loan Portfolio by Collateral Types	The following table sets forth information concerning the loan portfolio by collateral types as of the dates indicated.

			31-Mar-15			31-Dec-14
	Loans excluding PCI loans
	Real estate loans
	Residential		$	604,811		$	589,068
	Commercial			1,154,682			1,132,933
	Land, development and construction			85,186			79,002
	Total real estate			1,844,679			1,801,003
	Commercial			297,442			294,493
	Consumer and other loans			58,484			56,334
	Loans before unearned fees and deferred cost			2,200,605			2,151,830
	Net unearned fees and costs			790			929
	Total loans excluding PCI loans			2,201,395			2,152,759
	PCI loans (note 1)
	Real estate loans
	Residential			101,365			102,009
	Commercial			131,270			140,977
	Land, development and construction			24,294			24,032
	Total real estate			256,929			267,018
	Commercial			5,615			8,953
	Consumer and other loans			724			795
	Total PCI loans			263,268			276,766
	Total loans			2,464,663			2,429,525
	Allowance for loan losses for loans that are not PCI loans			(20,842	)		(19,384	)
	Allowance for loan losses for PCI loans			(138	)		(514	)
	Total loans, net of allowance for loan losses		$	2,443,683		$	2,409,627
	The following sets forth the covered FDIC loans included in the table above.

			31-Mar-15			31-Dec-14
	FDIC covered loans that are not PCI loans
	Real estate loans
	Residential		$	3,737		$	3,895
	Commercial			32,637			33,606
	Land, development and construction			1,002			866
	Total real estate			37,376			38,367
	Commercial			1,087			1,253
	Consumer and other loans			-			-
	FDIC covered loans, excluding PCI loans			38,463			39,620
	FDIC covered PCI loans (note 1)
	Real estate loans
	Residential			97,032			98,075
	Commercial			108,937			116,457
	Land, development and construction			14,987			15,395
	Total real estate			220,956			229,927
	Commercial			2,595			4,974
	Consumer and other loans			-			-
	Total FDIC covered PCI loans			223,551			234,901
	Total FDIC covered loans			262,014			274,521
	Allowance for loans losses for FDIC covered			(138	)		(514	)
	Total covered loans, net of allowance for loan losses		$	261,876		$	274,007


Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio	The table below set forth the activity in the allowance for loan losses for the periods presented.


	Three months ended March 31, 2015		Allowance for loan losses for loans that are not PCI loans			Allowance for loan losses on PCI loans			Total
	Balance at beginning of period		$	19,384		$	514		$	19,898
	Loans charged-off			(949	)		(77	)		(1,026	)
	Recoveries of loans previously charged-off			466			-			466
	Net charge-offs			(483	)		(77	)		(560	)
	Provision (recovery) for loan losses			1,941			(299	)		1,642
	Balance at end of period		$	20,842		$	138		$	20,980

	Three months ended March 31, 2014
	Balance at beginning of period		$	19,694		$	760		$	20,454
	Loans charged-off			(1,160	)		-			(1,160	)
	Recoveries of loans previously charged-off			843			-			843
	Net charge-offs			(317	)		-			(317	)
	(Recovery) provision for loan losses			(464	)		423			(41	)
	Balance at end of period		$	18,913		$	1,183		$	20,096


	The following tables present the activity in the allowance for loan losses by portfolio segment for the periods presented.

			Real Estate Loans
			Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total

	Allowance for loan losses for loans that are not PCI loans:

	Three months ended March 31, 2015
	Beginning of the period		$	6,743		$	8,269		$	752		$	2,330		$	1,290		$	19,384
	Charge-offs			(328	)		(60	)		(71	)		(278	)		(212	)		(949	)
	Recoveries			314			45			1			46			60			466
	Provision for loan losses			37			1,057			147			435			265			1,941
	Balance at end of period		$	6,766		$	9,311		$	829		$	2,533		$	1,403		$	20,842

	Three months ended March 31, 2014
	Beginning of the period		$	8,785		$	6,441		$	3,069		$	510		$	889		$	19,694
	Charge-offs			(687	)		(16	)		(77	)		(200	)		(180	)		(1,160	)
	Recoveries			455			314			23			1			50			843
	(Recovery) provision for loan losses			(741	)		599			(1,227	)		645			260			(464	)
	Balance at end of period		$	7,812		$	7,338		$	1,788		$	956		$	1,019		$	18,913


			Real Estate Loans
			Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total

	Allowance for loan losses for loans that are PCI loans:

	Three months ended March 31, 2015
	Beginning of the period		$	-		$	372		$	6		$	136		$	-		$	514
	Charge-offs			-			(77	)		-			-			-			(77	)
	Recoveries			-			-			-			-			-			-
	(Recovery) provision for loan losses			-			(165	)		(2	)		(132	)		-			(299	)
	Balance at end of period		$	-		$	130		$	4		$	4		$	-		$	138

	Three months ended March 31, 2014
	Beginning of the period		$	-		$	138		$	89		$	533		$	-		$	760
	Charge-offs			-			-			-			-			-			-
	Recoveries			-			-			-			-			-			-
	Provision (recovery) for loan losses			-			485			-			(62	)		-			423
	Balance at end of period		$	-		$	623		$	89		$	471		$	-		$	1,183



Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method	The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of March 31, 2015 and December 31, 2014. Accrued interest receivable and unearned loan fees and costs are not included in the recorded investment because they are not material.

			Real Estate Loans
	As of March 31, 2015		Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
	Allowance for loan losses:
	Ending allowance balance attributable to loans:
	Individually evaluated for impairment		$	431		$	351		$	278		$	5		$	36		$	1,101
	Collectively evaluated for impairment			6,335			8,960			551			2,528			1,367			19,741
	Purchased credit impaired			-			130			4			4			-			138
	Total ending allowance balance		$	6,766		$	9,441		$	833		$	2,537		$	1,403		$	20,980

	Loans:
	Individually evaluated for impairment		$	8,578		$	10,419		$	1,888		$	833		$	464		$	22,182
	Collectively evaluated for impairment			596,233			1,144,263			83,298			296,609			58,020			2,178,423
	Purchased credit impaired			101,365			131,270			24,294			5,615			724			263,268
	Total ending loan balances		$	706,176		$	1,285,952		$	109,480		$	303,057		$	59,208		$	2,463,873



		Real Estate Loans
	As of December 31, 2014		Residential			Commercial			Land, develop., constr.			Comm. & industrial			Consumer & other			Total
	Allowance for loan losses:
	Ending allowance balance attributable to loans:
	Individually evaluated for impairment		$	419		$	403		$	272		$	4		$	17		$	1,115
	Collectively evaluated for impairment			6,324			7,866			480			2,326			1,273			18,269
	Purchased credit impaired			-			372			6			136			-			514
	Total ending allowance balance		$	6,743		$	8,641		$	758		$	2,466		$	1,290		$	19,898

	Loans:
	Individually evaluated for impairment		$	9,980		$	10,902		$	2,748		$	1,365		$	255		$	25,250
	Collectively evaluated for impairment			579,088			1,122,031			76,254			293,128			56,079			2,126,580
	Purchased credit impaired			102,009			140,977			24,032			8,953			795			276,766
	Total ending loan balance		$	691,077		$	1,273,910		$	103,034		$	303,446		$	57,129		$	2,428,596

Summary of Impaired Loans
	The table below summarizes impaired loan data for the periods presented.

			Mar. 31, 2015			31-Dec-14
	Performing TDRs (these are not included in nonperforming loans ("NPLs"))		$	10,617		$	11,418
	Nonperforming TDRs (these are included in NPLs)			4,049			3,648
	Total TDRs (these are included in impaired loans)			14,666			15,066
	Impaired loans that are not TDRs			7,516			10,184
	Total impaired loans		$	22,182		$	25,250

Troubled Debt Restructured Loans by Loans Type	TDRs as of March 31, 2015 and December 31, 2014 quantified by loan type classified separately as accrual (performing loans) and non-accrual (non performing loans) are presented in the tables below.

	As of March 31, 2015		Accruing			Non Accrual			Total
	Real estate loans:
	Residential		$	6,708		$	1,597		$	8,305
	Commercial			2,309			2,004			4,313
	Land, development, construction			515			235			750
	Total real estate loans			9,532			3,836			13,368
	Commercial			672			161			833
	Consumer and other			413			52			465
	Total TDRs		$	10,617		$	4,049		$	14,666


	As of December 31, 2014		Accruing			Non-Accrual			Total
	Real estate loans:
	Residential		$	7,201		$	1,523		$	8,724
	Commercial			2,762			1,794			4,556
	Land, development, construction			547			241			788
	Total real estate loans			10,510			3,558			14,068
	Commercial			706			37			743
	Consumer and other			202			53			255
	Total TDRs		$	11,418		$	3,648		$	15,066

Summary of Loans by Class Modified	The following table presents loans by class modified and for which there was a payment default within twelve months following the modification during the periods ending March 31, 2015 and 2014.

			Period ending						Period ending
			31-Mar-15						31-Mar-14
			Number			Recorded			Number			Recorded
			of loans			investment			of loans			investment
	Residential			3		$	529			-		$	-
	Commercial real estate			3			467			4			1,319
	Land, development, construction			2			235			-			-
	Commercial and Industrial			1			43			2			33
	Consumer and other			2			34			-			-
	Total			11		$	1,308			6		$	1,352

Summary of Loans Individually Evaluated for Impairment by Class of Loans	The following tables present loans individually evaluated for impairment by class of loans as of March 31, 2015 and December 31, 2014, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30. The recorded investment is less than the unpaid principal balance due to partial charge-offs.

	As of March 31, 2015		Unpaid principal balance			Recorded investment			Allowance for loan losses allocated
	With no related allowance recorded:
	Residential real estate		$	5,627		$	5,481		$	-
	Commercial real estate			8,812			8,629			-
	Land, development, construction			1,244			654			-
	Commercial and industrial			595			586			-
	Consumer, other			159			159			-

	With an allowance recorded:
	Residential real estate			3,258			3,097			431
	Commercial real estate			1,997			1,790			351
	Land, development, construction			1,292			1,234			278
	Commercial and industrial			297			247			5
	Consumer, other			318			305			36
	Total		$	23,599		$	22,182		$	1,101

	As of December 31, 2014		Unpaid principal balance			Recorded investment			Allowance for loan losses allocated
	With no related allowance recorded:
	Residential real estate		$	6,797		$	6,672		$	-
	Commercial real estate			8,208			8,059			-
	Land, development, construction			2,234			1,606			-
	Commercial and industrial			1,132			1,129			-
	Consumer, other			-			-			-

	With an allowance recorded:
	Residential real estate			3,451			3,308			419
	Commercial real estate			3,024			2,843			403
	Land, development, construction			1,187			1,142			272
	Commercial and industrial			283			236			4
	Consumer, other			267			255			17
	Total		$	26,583		$	25,250		$	1,115

Summary of Impairment by Class of Loans
	Three month period ending March 31, 2015		Average of impaired loans			Interest income recognized during impairment			Cash basis interest income recognized
	Real estate loans:
	Residential		$	9,279		$	63		$	-
	Commercial			10,661			63			-
	Land, development, construction			2,317			6			-
	Total real estate loans			22,257			132			-

	Commercial and industrial			1,099			8			-
	Consumer and other loans			360			5			-
	Total		$	23,716		$	145		$	-



	Three month period ending March 31, 2014		Average of impaired loans			Interest income recognized during impairment			Cash basis interest income recognized
	Real estate loans:
	Residential		$	9,078		$	77		$	-
	Commercial			12,625			28			-
	Land, development, construction			1,383			9			-
	Total real estate loans			23,086			114			-

	Commercial and industrial			1,918			21			-
	Consumer and other loans			328			3			-
	Total		$	25,332		$	138		$	-


Summary of Nonperforming Loans	Nonperforming loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans, excluding purchased credit impaired loans accounted for pursuant to ASC Topic 310-30.

	Nonperforming loans were as follows:		Mar. 31, 2015			31-Dec-14
	Non accrual loans		$	26,857		$	25,595
	Loans past due over 90 days and still accruing interest			-			-
	Total non performing loans		$	26,857		$	25,595

Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due Over 90 Days Still on Accrual by Class of Loans	The following table presents the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans as of March 31, 2015 and December 31, 2014, excluding purchased credit impaired loans:

	As of March 31, 2015		Nonaccrual			Loans past due over 90 days still accruing
	Residential real estate		$	12,836		$	-
	Commercial real estate			9,737			-
	Land, development, construction			1,816			-
	Commercial			2,190			-
	Consumer, other			278			-
	Total		$	26,857		$	-

	As of December 31, 2014		Nonaccrual			Loans past due over 90 days still accruing
	Residential real estate		$	11,901		$	-
	Commercial real estate			8,470			-
	Land, development, construction			2,374			-
	Commercial			2,475			-
	Consumer, other			375			-
	Total		$	25,595		$	-

Summary Aging of Recorded Investment in Past Due Loans	The following table presents the aging of the recorded investment in past due loans as of March 31, 2015 and December 31, 2014, excluding purchased credit impaired loans:

									Accruing Loans
			Total			30 - 59 days past due			60 - 89 days past due			Greater than 90 days past due			Total Past Due			Loans Not Past Due			Nonaccrual Loans
	As of March 31, 2015
	Residential real estate		$	604,811		$	2,570		$	949		$	-		$	3,519		$	588,456		$	12,836
	Commercial real estate			1,154,682			3,861			2,227			-			6,088			1,138,857			9,737
	Land/dev/construction			85,186			236			508			-			744			82,626			1,816
	Commercial			297,442			613			2,207			-			2,820			292,432			2,190
	Consumer			58,484			194			137			-			331			57,875			278
			$	2,200,605		$	7,474		$	6,028		$	-		$	13,502		$	2,160,246		$	26,857


									Accruing Loans
			Total			30 - 59 days past due			60 - 89 days past due			Greater than 90 days past due			Total Past Due			Loans Not Past Due			Nonaccrual Loans
	As of December 31, 2014
	Residential real estate		$	589,068		$	2,162		$	1,451		$	-		$	3,613		$	573,554		$	11,901
	Commercial real estate			1,132,933			1,840			3,394			-			5,234			1,119,229			8,470
	Land/dev/construction			79,002			378			404			-			782			75,846			2,374
	Commercial			294,493			1,427			1,492			-			2,919			289,099			2,475
	Consumer			56,334			411			149			-			560			55,399			375
			$	2,151,830		$	6,218		$	6,890		$	-		$	13,108		$	2,113,127		$	25,595

Risk Category of Loans by Class of Loans, Excluding Purchased Credit Impaired Loans
						As of March 31, 2015
	Loan Category		Pass			Special Mention			Substandard			Doubtful
	Residential real estate		$	575,010		$	7,085		$	22,716		$	-
	Commercial real estate			1,088,608			31,892			34,182			-
	Land/dev/construction			73,960			7,703			3,523			-
	Commercial			290,747			3,919			2,776			-
	Consumer			57,707			272			505			-
	Total		$	2,086,032		$	50,871		$	63,702		$	-


						As of December 31, 2014
	Loan Category		Pass			Special Mention			Substandard			Doubtful
	Residential real estate		$	558,312		$	7,053		$	23,703		$ -
	Commercial real estate			1,063,979			34,953			34,001		-
	Land/dev/construction			65,216			9,731			4,055		-
	Commercial			285,549			4,419			4,525		-
	Consumer			55,590			278			466		-
	Total		$	2,028,646		$	56,434		$	66,750		$	-

Investment in Residential and Consumer Loans, Excluding Loans from Purchased Credit Impaired Loans	The following table presents the recorded investment in residential and consumer loans, excluding purchased credit impaired loans, based on payment activity as of March 31, 2015 and December 31, 2014:

	As of March 31, 2015		Residential			Consumer
	Performing		$	591,975			$	58,206
	Nonperforming			12,836				278
	Total		$	604,811			$	58,484

	As of December 31, 2014		Residential			Consumer
	Performing		$	577,167			$	55,959
	Nonperforming			11,901				375
	Total		$	589,068			$	56,334

Summary of Total Contractually Required Principal and Interest Cash Payments, Management's Estimate of Expected Total Cash Payments and Carrying Value of Loans	The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans as of March 31, 2015 and December 31, 2014. Contractually required principal and interest payments have been adjusted for estimated prepayments.

			Mar. 31, 2015			Dec. 31, 2014
	Contractually required principal and interest		$	411,235		$	460,836
	Non-accretable difference			(36,309	)		(68,757	)
	Cash flows expected to be collected			374,926			392,079
	Accretable yield			(111,658	)		(115,313	)
	Carrying value of acquired loans			263,268			276,766
	Allowance for loan losses			(138	)		(514	)
	Carrying value less allowance for loan losses		$	263,130		$	276,252

Summary of Changes in Total Contractually Required Principal and Interest Cash Payments	The table below summarizes the changes in total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and carrying value of the loans during the three month periods ending March 31, 2015 and 2014.

	Activity during the					Effect of			income			all other
	three month period ending March 31, 2015		31-Dec-14			acquisitions			accretion			adjustments			31-Mar-15
	Contractually required principal and interest		$	460,836		$	-		$	-		$	(49,601	)	$	411,235
	Non-accretable difference			(68,757	)		-			-			32,448			(36,309	)
	Cash flows expected to be collected			392,079			-			-			(17,153	)		374,926
	Accretable yield			(115,313	)		-			9,930			(6,275	)		(111,658	)
	Carry value of acquired loans		$	276,766		$	-		$	9,930		$	(23,428	)	$	263,268

	Activity during the					Effect of			income			all other
	three month period ending March 31, 2014		31-Dec-13			acquisitions			accretion			adjustments			31-Mar-14
	Contractually required principal and interest		$	389,537		$	48,289		$	-		$	(23,441	)	$	414,385
	Non-accretable difference			(55,304	)		(11,766	)		-			11,008			(56,062	)
	Cash flows expected to be collected			334,233			36,523			-			(12,433	)		358,323
	Accretable yield			(102,812	)		(6,455	)		8,231			(6,487	)		(107,523	)
	Carry value of acquired loans		$	231,421		$	30,068		$	8,231		$	(18,920	)	$	250,800

FDIC_Indemnification_Asset_Tab

FDIC Indemnification Asset (Tables)	3 Months Ended
FDIC Indemnification Asset (Tables)	Mar. 31, 2015
Fdic Loss Share Indemnification Asset [Abstract]
FDIC Loss Share Indemnification Asset	The activity in the FDIC loss share indemnification asset is as follows:

		Three month period ended Mar 31, 2015			Twelve month period ended Dec 31, 2014
	Beginning of the year	$	49,054		$	73,877
	Effect of acquisition		-			2,636
	Amortization, net		(4,316	)		(20,664	)
	Indemnification revenue		906			3,098
	Indemnification of foreclosure expense		(157	)		237
	Proceeds from FDIC		(3,654	)		(10,014	)
	Impairment (recovery) of loan pool		(239	)		(116	)
	Period end balance	$	41,594		$	49,054

FDIC Activity In True-up Payment Liability	The activity in the true-up payment liability is as follows:

		Three month period ended Mar 31, 2015			Twelve month period ended Dec 31, 2014
	Beginning of the year	$	1,205		$	444
	Effect of acquisition		-			682
	True-up liability accrual		34			79
	Period end balance	$	1,239		$	1,205

Nature_of_Operations_and_Basis1

Nature of Operations and Basis of Presentation - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Revenue_Generating_Activities
	County
	Location
Nature Of Operations And Basis Of Presentation [Abstract]
Number of service banking locations	58
Number of counties in which company operates	20
Number of inter-related revenue generating activities	3

Common_Stock_Outstanding_and_E2

Common Stock Outstanding and Earnings Per Share Data - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Anti dilutive stock options	586,620	1,016,949

Common_Stock_Outstanding_and_E3

Common Stock Outstanding and Earnings Per Share Data - Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Share Computations (Detail) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Basic
Net income available to common shareholders	$9,148	$1,053
Less: Earnings allocated to participating securities	-51
Net income allocated to common shareholders	9,097	1,053
Weighted average common shares outstanding including participating securities	45,379,982	34,465,022
Less: Participating securities	-252,042
Basic	45,127,940	34,465,022
Basic earnings per common share	$0.20	$0.03
Diluted
Net income available to common shareholders	$9,097	$1,053
Weighted average common shares outstanding for basic earnings per common share	45,127,940	34,465,022
Add: Dilutive effects of stock based compensation awards	529,684	397,681
Average shares and dilutive potential common shares	45,657,624	34,862,703
Diluted earnings per common share	$0.20	$0.03

Fair_Value_Assets_and_Liabilit

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets:
Trading securities, at fair value	$1,017	$3,420
Available for sale securities	520,247	517,457
US Treasury Securities [Member]
Assets:
Available for sale securities	1,006
Mortgage Backed Securities [Member]
Assets:
Available for sale securities	480,341	478,633
Municipal Securities [Member]
Assets:
Available for sale securities	38,900	38,821
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Trading securities, at fair value	1,017	3,420
Available for sale securities	520,247	517,457
Fair Value Measurements on Recurring [Member]
Assets:
Trading securities, at fair value	1,017	3,420
Interest rate swap derivatives, carrying amount assets	10,467	6,800
Liabilities:
Interest rate swap derivatives, carrying amount liability	11,667	7,575
Fair Value Measurements on Recurring [Member] \| US Treasury Securities [Member]
Assets:
Available for sale securities	1,006
Fair Value Measurements on Recurring [Member] \| Mortgage Backed Securities [Member]
Assets:
Available for sale securities	480,341	478,633
Fair Value Measurements on Recurring [Member] \| Municipal Securities [Member]
Assets:
Available for sale securities	38,900	38,821
Fair Value Measurements on Recurring [Member] \| US Government-sponsored Enterprises Debt Securities [Member]
Assets:
Available for sale securities		3
Fair Value Measurements on Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Trading securities, at fair value	1,017	3,420
Interest rate swap derivatives, carrying amount assets	10,467	6,800
Liabilities:
Interest rate swap derivatives, carrying amount liability	11,667	7,575
Fair Value Measurements on Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| US Treasury Securities [Member]
Assets:
Available for sale securities	1,006
Fair Value Measurements on Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Mortgage Backed Securities [Member]
Assets:
Available for sale securities	480,341	478,633
Fair Value Measurements on Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Municipal Securities [Member]
Assets:
Available for sale securities	38,900	38,821
Fair Value Measurements on Recurring [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| US Government-sponsored Enterprises Debt Securities [Member]
Assets:
Available for sale securities		$3

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans with allocated allowance for loan losses	$10,232		$10,677
Impaired valuation allowance	864		852
Provision for loan loss expense	120	380
Repossessed real estate owned valuation write down	389	1,020
Impairment charges recognized	$682	$2,506
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rates to determine fair value of collateral	8.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rates to determine fair value of collateral	11.00%

Fair_Value_Assets_and_Liabilit1

Fair Value - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans on Residential real estate at Carrying value	$3,302	$2,971
Impaired loans on Commercial real estate at Carrying value	4,360	4,854
Impaired loans on Land, land development and construction at Carrying value	1,228	1,731
Impaired loans on Commercial at Carrying value	380	167
Impaired loans on Consumer at Carrying value	98	102
Other real estate owned on Residential real estate at Carrying value	443	448
Other real estate owned on Commercial real estate at Carrying value	3,185	2,363
Other real estate owned on Land, land development and construction at Carrying value	4,856	2,240
Bank owned real estate held for sale	2,449	2,675
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans on Residential real estate	3,302	2,971
Impaired loans on Commercial real estate	4,360	4,854
Impaired loans on Land, land development and construction	1,228	1,731
Impaired loans on Commercial	380	167
Impaired loans on Consumer	98	102
Other real estate owned on Residential real estate	443	448
Other real estate owned on Commercial real estate	3,185	2,363
Other real estate owned on Land, land development and construction	4,856	2,240
Bank owned real estate held for sale	$2,449	$2,675

Fair_Value_Carrying_Amounts_an

Fair Value - Carrying Amounts and Estimated Fair Values of Company's Financial Instruments (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Financial assets:
Cash and cash equivalents	$256,341,000	$158,413,000	$220,261,000	$174,889,000
Cash and cash equivalents, fair value	256,341,000	158,413,000
Trading securities, at fair value	1,017,000	3,420,000
Investment securities available for sale, at fair value	520,247,000	517,457,000
Investment securities held to maturity, carrying amount	228,870,000	237,362,000
Investment securities held to maturity, at fair value	230,439,000	238,431,000
Federal Home Loan Bank and Federal Reserve Bank stock, at cost	14,011,000	14,219,000
Loans held for sale, carrying amount	522,000	1,251,000
Loans held for sale, fair value	522,000	1,251,000
Loans, less allowance for loan losses, carrying amount	2,443,683,000	2,409,627,000
Loans, less allowance for loan losses, fair value	2,451,451,000	2,418,405,000
FDIC indemnification asset, carrying amount	41,594,000	49,054,000		73,877,000
Interest rate swap derivatives, carrying amount assets	10,467,000	6,800,000
Interest rate swap derivatives, assets fair value	10,467,000	6,800,000
Accrued interest receivable, carrying amount	9,275,000	8,999,000
Accrued interest receivable, fair value	9,275,000	8,999,000
Financial liabilities:
Deposits- without stated maturities, carrying amount	2,690,337,000	2,604,228,000
Deposits- without stated maturities, fair value	2,690,337,000	2,604,228,000
Deposits- with stated maturities, carrying amount	459,035,000	487,812,000
Deposits- with stated maturities, fair value	460,919,000	491,999,000
Securities sold under agreement to repurchase, fair value	31,071,000	27,022,000
Securities sold under agreement to repurchase	31,071,000	27,022,000
Federal funds purchased, carrying amount	187,443,000	151,992,000
Corporate debentures, carrying amount	23,961,000	23,917,000
Federal funds purchased, fair value	187,443,000	151,992,000
Interest rate swap derivatives, carrying amount	11,667,000	7,575,000
Corporate debentures, fair value	19,345,000	19,722,000
Accrued interest payable, carrying amount	293,000	336,000
Interest rate swap derivatives, fair value	11,667,000	7,575,000
Accrued interest payable, fair value	293,000	336,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets:
Cash and cash equivalents, fair value	256,341,000	158,413,000
Financial liabilities:
Deposits- without stated maturities, fair value	2,690,337,000	2,604,228,000
Significant Other Observable Inputs (Level 2) [Member]
Financial assets:
Trading securities, at fair value	1,017,000	3,420,000
Investment securities available for sale, at fair value	520,247,000	517,457,000
Investment securities held to maturity, at fair value	230,439,000	238,431,000
Loans held for sale, fair value	522,000	1,251,000
Interest rate swap derivatives, assets fair value	10,467,000	6,800,000
Financial liabilities:
Deposits- with stated maturities, fair value	460,919,000	491,999,000
Securities sold under agreement to repurchase, fair value	31,071,000	27,022,000
Federal funds purchased, fair value	187,443,000	151,992,000
Interest rate swap derivatives, fair value	11,667,000	7,575,000
Accrued interest payable, fair value	293,000	336,000
Significant Unobservable Inputs (Level 3) [Member]
Financial assets:
Loans, less allowance for loan losses, fair value	2,451,451,000	2,418,405,000
Accrued interest receivable, fair value	9,275,000	8,999,000
Financial liabilities:
Corporate debentures, fair value	$19,345,000	$19,722,000

Fair_Value_Carrying_Amounts_an1

Fair Value - Carrying Amounts and Estimated Fair Values of Company's Financial Instruments (Parenthetical) (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Deduction of Allowance for loan losses from loans	$20,980	$19,898	$20,096	$20,454

Reportable_Segments_Reconcilia

Reportable Segments - Reconciliation of Reportable Segment Revenues, Expenses and Profit (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Interest income	$39,485	$29,782
Interest expense	-1,865	-1,589
Net interest income	37,620	28,193
Provision for loan losses	-1,642	41
Non interest income	9,081	5,760
Non interest expense	-30,603	-32,403
Net income (loss) before taxes	14,456	1,591
Income tax (provision) benefit	-5,308	-538
Net income	9,148	1,053
Total assets	3,888,572	3,005,697	3,776,869
Operating Segments [Member] \| Commercial and Retail Banking [Member]
Segment Reporting Information [Line Items]
Interest income	37,751	29,070
Interest expense	-1,496	-1,361
Net interest income	36,255	27,709
Provision for loan losses	-1,511	41
Non interest income	2,281	1,829
Non interest expense	-23,899	-27,167
Net income (loss) before taxes	13,126	2,412
Income tax (provision) benefit	-4,792	-849
Net income	8,334	1,563
Total assets	3,573,573	2,835,871
Operating Segments [Member] \| Correspondent Banking And Capital Markets Division [Member]
Segment Reporting Information [Line Items]
Interest income	1,734	712
Interest expense	-132	-5
Net interest income	1,602	707
Provision for loan losses	-131
Non interest income	6,800	3,931
Non interest expense	-5,595	-4,378
Net income (loss) before taxes	2,676	260
Income tax (provision) benefit	-1,032	-100
Net income	1,644	160
Total assets	305,667	164,599
Corporate Overhead and Administration [Member]
Segment Reporting Information [Line Items]
Interest expense	-237	-223
Net interest income	-237	-223
Non interest expense	-1,109	-858
Net income (loss) before taxes	-1,346	-1,081
Income tax (provision) benefit	516	411
Net income	-830	-670
Total assets	493,374	363,107
Elimination Entries [Member]
Segment Reporting Information [Line Items]
Total assets	($484,042)	($357,880)

Reportable_Segments_Additional

Reportable Segments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Location
	County
Segment Reporting Information [Line Items]
Number of counties in which company operates	20
Number of bank locations	58
Commercial and Retail Banking [Member]
Segment Reporting Information [Line Items]
Number of non bank subsidiary	1
Number of counties in which company operates	20
Number of bank locations	58

Investment_Securities_Availabl

Investment Securities Available for Sale - Fair Value of Available for Sale Securities and Related Gross Unrealized Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$511,999	$510,859
Gross Unrealized Gains	9,322	8,309
Gross Unrealized Losses	1,074	1,711
Available for sale securities	520,247	517,457
Obligations of U.S. government sponsored entities and agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		3
Available for sale securities		3
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,004
Gross Unrealized Gains	2
Available for sale securities	1,006
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	473,592	473,396
Gross Unrealized Gains	7,801	6,897
Gross Unrealized Losses	1,052	1,660
Available for sale securities	480,341	478,633
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	37,403	37,460
Gross Unrealized Gains	1,519	1,412
Gross Unrealized Losses	22	51
Available for sale securities	$38,900	$38,821

Investment_Securities_Availabl1

Investment Securities Available for Sale - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	Security	Mar. 31, 2014	Security
Investments Debt And Equity Securities [Abstract]
Gain (loss) on sale of securities acquired through Gulfstream acquisition	$0	$0
Tax provision related to net realized gains	0	0
Securities estimated fair value	$134,044,000		$139,297,000
Percentage of AFS securities held by any one issuer as a percentage of stockholders' equity	10.00%		10.00%
Number of securities representing specified criteria	0		0
Percentage of mortgage-backed securities held from U.S. government-sponsored entities and agencies	100.00%

Investment_Securities_Availabl2

Investment Securities Available for Sale - Schedule of Sales of Available for Sale Securities (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Investments Debt And Equity Securities [Abstract]
Proceeds	$60,816

Investment_Securities_Availabl3

Investment Securities Available for Sale - Fair Value and Amortized Cost of Investment Securities by Contractual Maturity (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investments Debt And Equity Securities [Abstract]
Investment securities available for sale, Due in one year or less, Fair Value	$527
Investment securities available for sale, Due after one year through five years, Fair Value	2,562
Investment securities available for sale, Due after five years through ten years, Fair Value	17,292
Investment securities available for sale, Due after ten years through thirty years, Fair Value	19,525
Investment securities available for sale, Mortgage backed securities, Fair Value	480,341
Fair Value	520,247	517,457
Investment securities available for sale, Due in one year or less, Amortized Cost	516
Investment securities available for sale, Due after one year through five years, Amortized Cost	2,499
Investment securities available for sale, Due after five years through ten years, Amortized Cost	16,622
Investment securities available for sale, Due after ten years through thirty years, Amortized Cost	18,770
Investment securities available for sale, Mortgage backed securities, Amortized Cost	473,592
Amortized Cost	$511,999	$510,859

Investment_Securities_Availabl4

Investment Securities Available for Sale - Investments Gross Unrealized Losses and Fair Value (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$47,040	$15,876
Less than 12 months, Unrealized Losses	91	41
12 months or more, Fair Value	61,245	99,010
12 months or more, Unrealized Losses	961	1,619
Total, Fair Value	108,285	114,886
Total, Unrealized Losses	1,052	1,660
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	2,155
Less than 12 months, Unrealized Losses	22
12 months or more, Fair Value		3,194
12 months or more, Unrealized Losses		51
Total, Fair Value	2,155	3,194
Total, Unrealized Losses	22	51
Total Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	49,195	15,876
Less than 12 months, Unrealized Losses	113	41
12 months or more, Fair Value	61,245	102,204
12 months or more, Unrealized Losses	961	1,670
Total, Fair Value	110,440	118,080
Total, Unrealized Losses	$1,074	$1,711

Investment_Securities_Held_to_

Investment Securities Held to Maturity - Fair Value of Held to Maturity Securities and Related Gross Unrecognized Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$228,870	$237,362
Gross Unrecognized Gains	1,595	1,081
Gross Unrecognized Losses	26	12
Held-to-maturity securities, fair value	230,439	238,431
Obligations of U.S. government sponsored entities and agencies [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	42,779	49,793
Gross Unrecognized Gains	159	122
Held-to-maturity securities, fair value	42,938	49,915
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	152,458	161,727
Gross Unrecognized Gains	1,028	654
Gross Unrecognized Losses	1
Held-to-maturity securities, fair value	153,485	162,381
Municipal Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	33,633	25,842
Gross Unrecognized Gains	408	305
Gross Unrecognized Losses	25	12
Held-to-maturity securities, fair value	$34,016	$26,135

Investment_Securities_Held_to_1

Investment Securities Held to Maturity - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
	Security	Security
Schedule of Held-to-maturity Securities [Line Items]
Number of securities representing specified criteria	0	0
Percentage of HTM securities held by any one issuer as a percentage of stockholders' equity	10.00%
Held to maturity securities pledged, estimated fair value	$57,042	$51,531
Percentage of mortgage-backed securities held from U.S. government-sponsored entities and agencies	100.00%
Held-to-maturity Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Number of securities representing specified criteria	0
Percentage of mortgage-backed securities held from U.S. government-sponsored entities and agencies	100.00%

Investment_Securities_Held_to_2

Investment Securities Held to Maturity - Fair Value and Amortized Cost of Investment Securities by Contractual Maturity (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investments Debt And Equity Securities [Abstract]
Investment securities available for sale, Due after five years through ten years, Fair Value	$29,846
Investment securities available for sale, Due after ten years through thirty years, Fair Value	47,108
Investment securities available for sale, Mortgage backed securities, Fair Value	153,485
Fair Value	230,439	238,431
Investment securities available for sale, Due after five years through ten years, Amortized Cost	29,756
Investment securities available for sale, Due after ten years through thirty years, Amortized Cost	46,656
Investment securities available for sale, Mortgage backed securities, Amortized Cost	152,458
Amortized Cost	$228,870	$237,362

Investment_Securities_Held_to_3

Investment Securities Held to Maturity - Investments Gross Unrecognized Losses and Fair Value (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	$15,932
Less than 12 months, Unrecognized Losses	1
Total, Fair Value	15,932
Total, Unrecognized Losses	1
Municipal Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	3,566	2,475
Less than 12 months, Unrecognized Losses	25	12
Total, Fair Value	3,566	2,475
Total, Unrecognized Losses	25	12
Total Temporarily Impaired Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	19,498	2,475
Less than 12 months, Unrecognized Losses	26	12
Total, Fair Value	19,498	2,475
Total, Unrecognized Losses	$26	$12

Loans_Summary_of_Information_C

Loans - Summary of Information Concerning Loan Portfolio by Collateral Types (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Receivables with Imputed Interest [Line Items]
Total loans excluding purchased credit impaired loans	$2,201,395	$2,152,759
Total PCI loans	263,268	276,766
Total loans	2,464,663	2,429,525
Allowance for loan losses for loans that are not PCI loans	-20,842	-19,384
Net Loans	2,443,683	2,409,627
Allowance for loan losses for loans that are not PCI loans [Member]
Receivables with Imputed Interest [Line Items]
Real estate loans, Residential	604,811	589,068
Real estate loans, Commercial	1,154,682	1,132,933
Land, development and construction	85,186	79,002
Total real estate	1,844,679	1,801,003
Commercial	297,442	294,493
Consumer and other loans	58,484	56,334
Loans before unearned fees and deferred cost	2,200,605	2,151,830
Net unearned fees and costs	790	929
Allowance for loan losses on PCI loans [Member]
Receivables with Imputed Interest [Line Items]
Real estate loans, Residential	101,365	102,009
Real estate loans, Commercial	131,270	140,977
Land, development and construction	24,294	24,032
Total real estate	256,929	267,018
Commercial	5,615	8,953
Consumer and other loans	724	795
Allowance for loan losses for PCI loans	-138	-514	-1,183	-760
FDIC Covered Loans Excluding Purchased Credit Impaired Loans [Member]
Receivables with Imputed Interest [Line Items]
Real estate loans, Residential	3,737	3,895
Real estate loans, Commercial	32,637	33,606
Land, development and construction	1,002	866
Total real estate	37,376	38,367
Commercial	1,087	1,253
Consumer and other loans	0	0
Total loans excluding purchased credit impaired loans	38,463	39,620
FDIC Covered Loans Purchased Credit Impaired Loans [Member]
Receivables with Imputed Interest [Line Items]
Real estate loans, Residential	97,032	98,075
Real estate loans, Commercial	108,937	116,457
Land, development and construction	14,987	15,395
Total real estate	220,956	229,927
Commercial	2,595	4,974
Consumer and other loans	0	0
Total FDIC covered PCI loans	223,551	234,901
Allowance for loans losses for FDIC covered PCI loans	-138	-514
Total covered loans, net of allowance for loan losses	261,876	274,007
FDIC Covered Loans [Member]
Receivables with Imputed Interest [Line Items]
Total FDIC covered loans	$262,014	$274,521

Loans_Summary_of_Allowance_for

Loans - Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolios (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Charge-offs	($1,026)	($1,160)
Recoveries of loans previously charged-off	466	843
Net charge-offs	-560	-317
Provision (recovery) for loan losses	1,642	-41
Balance at beginning of period	19,898	20,454
Balance at end of period	20,980	20,096
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			6,743
Balance at end of period	6,766		6,743
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			8,641
Balance at end of period	9,441		8,641
Land, Development, Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			758
Balance at end of period	833		758
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			2,466
Balance at end of period	2,537		2,466
Consumer and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			1,290
Balance at end of period	1,403		1,290
Allowance for loan losses for loans that are not PCI loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	19,384	19,694
Charge-offs	-949	-1,160
Recoveries of loans previously charged-off	466	843
Net charge-offs	-483	-317
Provision (recovery) for loan losses	1,941	-464
Balance at end of period, not purchased credit impaired	20,842	18,913
Allowance for loan losses for loans that are not PCI loans [Member] \| Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	6,743	8,785
Charge-offs	-328	-687
Recoveries of loans previously charged-off	314	455
Provision (recovery) for loan losses	37	-741
Balance at end of period, not purchased credit impaired	6,766	7,812
Allowance for loan losses for loans that are not PCI loans [Member] \| Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	8,269	6,441
Charge-offs	-60	-16
Recoveries of loans previously charged-off	45	314
Provision (recovery) for loan losses	1,057	599
Balance at end of period, not purchased credit impaired	9,311	7,338
Allowance for loan losses for loans that are not PCI loans [Member] \| Land, Development, Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	752	3,069
Charge-offs	-71	-77
Recoveries of loans previously charged-off	1	23
Provision (recovery) for loan losses	147	-1,227
Balance at end of period, not purchased credit impaired	829	1,788
Allowance for loan losses for loans that are not PCI loans [Member] \| Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	2,330	510
Charge-offs	-278	-200
Recoveries of loans previously charged-off	46	1
Provision (recovery) for loan losses	435	645
Balance at end of period, not purchased credit impaired	2,533	956
Allowance for loan losses for loans that are not PCI loans [Member] \| Consumer and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	1,290	889
Charge-offs	-212	-180
Recoveries of loans previously charged-off	60	50
Provision (recovery) for loan losses	265	260
Balance at end of period, not purchased credit impaired	1,403	1,019
Allowance for loan losses on PCI loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Charge-offs	-77
Net charge-offs	-77
Provision (recovery) for loan losses	-299	423
Balance at beginning of period, purchased credit impaired	514	760
Charge-offs	-77
Balance at end of period, purchased credit impaired	138	1,183
Allowance for loan losses on PCI loans [Member] \| Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Charge-offs	-77
Provision (recovery) for loan losses	-165	485
Balance at beginning of period, purchased credit impaired	372	138
Balance at end of period, purchased credit impaired	130	623
Allowance for loan losses on PCI loans [Member] \| Land, Development, Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision (recovery) for loan losses	-2
Balance at beginning of period, purchased credit impaired	6			89
Balance at end of period, purchased credit impaired	4	89		89
Allowance for loan losses on PCI loans [Member] \| Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision (recovery) for loan losses	-132	-62
Balance at beginning of period, purchased credit impaired	136	533
Balance at end of period, purchased credit impaired	$4	$471

Loans_Allowance_for_Loan_Losse

Loans - Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Allowance for loan losses:
Individually evaluated for impairment	$1,101	$1,115
Collectively evaluated for impairment	19,741	18,269
Purchased credit impaired	138	514
Total ending allowance balance	20,980	19,898	20,096	20,454
Loans:
Individually evaluated for impairment	22,182	25,250
Collectively evaluated for impairment	2,178,423	2,126,580
Purchased credit impaired	263,268	276,766
Total ending loan balances	2,463,873	2,428,596
Residential Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	431	419
Collectively evaluated for impairment	6,335	6,324
Total ending allowance balance	6,766	6,743
Loans:
Individually evaluated for impairment	8,578	9,980
Collectively evaluated for impairment	596,233	579,088
Purchased credit impaired	101,365	102,009
Total ending loan balances	706,176	691,077
Commercial Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	351	403
Collectively evaluated for impairment	8,960	7,866
Purchased credit impaired	130	372
Total ending allowance balance	9,441	8,641
Loans:
Individually evaluated for impairment	10,419	10,902
Collectively evaluated for impairment	1,144,263	1,122,031
Purchased credit impaired	131,270	140,977
Total ending loan balances	1,285,952	1,273,910
Land, Development, Construction [Member]
Allowance for loan losses:
Individually evaluated for impairment	278	272
Collectively evaluated for impairment	551	480
Purchased credit impaired	4	6
Total ending allowance balance	833	758
Loans:
Individually evaluated for impairment	1,888	2,748
Collectively evaluated for impairment	83,298	76,254
Purchased credit impaired	24,294	24,032
Total ending loan balances	109,480	103,034
Commercial and Industrial [Member]
Allowance for loan losses:
Individually evaluated for impairment	5	4
Collectively evaluated for impairment	2,528	2,326
Purchased credit impaired	4	136
Total ending allowance balance	2,537	2,466
Loans:
Individually evaluated for impairment	833	1,365
Collectively evaluated for impairment	296,609	293,128
Purchased credit impaired	5,615	8,953
Total ending loan balances	303,057	303,446
Consumer and Other [Member]
Allowance for loan losses:
Individually evaluated for impairment	36	17
Collectively evaluated for impairment	1,367	1,273
Total ending allowance balance	1,403	1,290
Loans:
Individually evaluated for impairment	464	255
Collectively evaluated for impairment	58,020	56,079
Purchased credit impaired	724	795
Total ending loan balances	$59,208	$57,129

Loans_Additional_Information_D

Loans - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Loans [Line Items]
Loans modification, modified terms allowance period minimum	12 months
Loans modification, modified terms allowance period maximum	24 months
Provision for loan loss expense	$94
Partial charge offs for troubled debt restructured	63
Percentage of troubled debt restructured current pursuant to modified terms	72.00%
Non performing TDRs	4,049
Percentage of troubled debt restructured not performing pursuant to their modified terms	28.00%
Provision for loan loss expense within twelve months	40	15
Partial charge offs for troubled debt restructured	31	21
Reclassification from non-accretable difference	6,057	7,294
Gulfstream Bancshares Inc [Member]
Loans [Line Items]
Fair value adjustment for loans	7,680
Fair value adjustment for loans, percentage	2.30%
Allowance for loan losses from loans acquired	1,944
Performing loans acquired, period since acquisitions	14 months
First Southern Bank Inc [Member]
Loans [Line Items]
Fair value adjustment for loans	10,725
Fair value adjustment for loans, percentage	2.00%
Allowance for loan losses from loans acquired	$1,052
Performing loans acquired, period since acquisitions	10 months

Loans_Summary_of_Impaired_Loan

Loans - Summary of Impaired Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Mortgage Loans On Real Estate [Line Items]
Total TDRs (these are included in impaired loans)	$14,666	$15,066
Impaired loans that are not TDRs	7,516	10,184
Total impaired loans	22,182	25,250
Performing TDRs [Member]
Mortgage Loans On Real Estate [Line Items]
Total TDRs (these are included in impaired loans)	10,617	11,418
Nonperforming TDRs [Member]
Mortgage Loans On Real Estate [Line Items]
Total TDRs (these are included in impaired loans)	$4,049	$3,648

Loans_Troubled_Debt_Restructur

Loans - Troubled Debt Restructured Loans by Loans Type (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
TDRs	$14,666	$15,066
Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	10,617	11,418
Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	4,049	3,648
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs	8,305	8,724
Residential Real Estate [Member] \| Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	6,708	7,201
Residential Real Estate [Member] \| Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	1,597	1,523
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs	4,313	4,556
Commercial Real Estate [Member] \| Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	2,309	2,762
Commercial Real Estate [Member] \| Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	2,004	1,794
Land, Development, Construction [Member]
Financing Receivable, Modifications [Line Items]
TDRs	750	788
Land, Development, Construction [Member] \| Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	515	547
Land, Development, Construction [Member] \| Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	235	241
Total Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
TDRs	13,368	14,068
Total Real Estate Loans [Member] \| Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	9,532	10,510
Total Real Estate Loans [Member] \| Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	3,836	3,558
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
TDRs	833	743
Commercial and Industrial [Member] \| Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	672	706
Commercial and Industrial [Member] \| Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	161	37
Consumer and Other [Member]
Financing Receivable, Modifications [Line Items]
TDRs	465	255
Consumer and Other [Member] \| Accruing [Member]
Financing Receivable, Modifications [Line Items]
TDRs	413	202
Consumer and Other [Member] \| Non Accrual [Member]
Financing Receivable, Modifications [Line Items]
TDRs	$52	$53

Loans_Summary_of_Loans_by_Clas

Loans - Summary of Loans by Class Modified (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	SecurityLoan	SecurityLoan
Mortgage Loans On Real Estate [Line Items]
Number of loans	11	6
Recorded investment	$1,308	$1,352
Residential Real Estate [Member]
Mortgage Loans On Real Estate [Line Items]
Number of loans	3
Recorded investment	529
Commercial Real Estate [Member]
Mortgage Loans On Real Estate [Line Items]
Number of loans	3	4
Recorded investment	467	1,319
Land, Development, Construction [Member]
Mortgage Loans On Real Estate [Line Items]
Number of loans	2
Recorded investment	235
Commercial Loans and Industrial [Member]
Mortgage Loans On Real Estate [Line Items]
Number of loans	1	2
Recorded investment	43	33
Consumer and Other [Member]
Mortgage Loans On Real Estate [Line Items]
Number of loans	2
Recorded investment	$34

Loans_Summary_of_Loans_Individ

Loans - Summary of Loans Individually Evaluated for Impairment by Class of Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$23,599	$26,583
Total impaired loans	22,182	25,250
Amount of allowance for loan losses allocated to impaired loans	1,101	1,115
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	5,627	6,797
Unpaid principal balance, With an allowance recorded	3,258	3,451
Recorded investment, With no related allowance	5,481	6,672
Recorded investment, With an allowance recorded	3,097	3,308
Total impaired loans	8,578	9,980
Amount of allowance for loan losses allocated to impaired loans	431	419
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	8,812	8,208
Unpaid principal balance, With an allowance recorded	1,997	3,024
Recorded investment, With no related allowance	8,629	8,059
Recorded investment, With an allowance recorded	1,790	2,843
Total impaired loans	10,419	10,902
Amount of allowance for loan losses allocated to impaired loans	351	403
Land, Development, Construction [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	1,244	2,234
Unpaid principal balance, With an allowance recorded	1,292	1,187
Recorded investment, With no related allowance	654	1,606
Recorded investment, With an allowance recorded	1,234	1,142
Total impaired loans	1,888	2,748
Amount of allowance for loan losses allocated to impaired loans	278	272
Commercial Loans and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	595	1,132
Unpaid principal balance, With an allowance recorded	297	283
Recorded investment, With no related allowance	586	1,129
Recorded investment, With an allowance recorded	247	236
Total impaired loans	833	1,365
Amount of allowance for loan losses allocated to impaired loans	5	4
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance, With no allowance recorded	159
Unpaid principal balance, With an allowance recorded	318	267
Recorded investment, With no related allowance	159
Recorded investment, With an allowance recorded	305	255
Total impaired loans	464	255
Amount of allowance for loan losses allocated to impaired loans	$36	$17

Loans_Summary_of_Impairment_by

Loans - Summary of Impairment by Class of Loans (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	$23,716	$25,332
Interest income recognized during impairment	145	138
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	9,279	9,078
Interest income recognized during impairment	63	77
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	10,661	12,625
Interest income recognized during impairment	63	28
Land, Development, Construction [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	2,317	1,383
Interest income recognized during impairment	6	9
Total Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	22,257	23,086
Interest income recognized during impairment	132	114
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	1,099	1,918
Interest income recognized during impairment	8	21
Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Average of impaired loans during the period	360	328
Interest income recognized during impairment	$5	$3

Loans_Summary_of_Nonperforming

Loans - Summary of Nonperforming Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Summary Of Nonperforming Loans [Abstract]
Non accrual loans	$26,857	$25,595
Total non performing loans	$26,857	$25,595

Loans_Summary_of_Recorded_Inve

Loans - Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due Over 90 Days Still on Accrual by Class of Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$26,857	$25,595
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	12,836	11,901
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	9,737	8,470
Land, Development, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,816	2,374
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	2,190	2,475
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$278	$375

Loans_Summary_Aging_of_Recorde

Loans - Summary Aging of Recorded Investment in Past Due Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$2,200,605	$2,151,830
30 - 59 days past due	7,474	6,218
60 - 89 days past due	6,028	6,890
Total Past Due	13,502	13,108
Loans Not Past Due	2,160,246	2,113,127
Non accrual loans	26,857	25,595
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	604,811	589,068
30 - 59 days past due	2,570	2,162
60 - 89 days past due	949	1,451
Total Past Due	3,519	3,613
Loans Not Past Due	588,456	573,554
Non accrual loans	12,836	11,901
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	1,154,682	1,132,933
30 - 59 days past due	3,861	1,840
60 - 89 days past due	2,227	3,394
Total Past Due	6,088	5,234
Loans Not Past Due	1,138,857	1,119,229
Non accrual loans	9,737	8,470
Land, Development, Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	85,186	79,002
30 - 59 days past due	236	378
60 - 89 days past due	508	404
Total Past Due	744	782
Loans Not Past Due	82,626	75,846
Non accrual loans	1,816	2,374
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	297,442	294,493
30 - 59 days past due	613	1,427
60 - 89 days past due	2,207	1,492
Total Past Due	2,820	2,919
Loans Not Past Due	292,432	289,099
Non accrual loans	2,190	2,475
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	58,484	56,334
30 - 59 days past due	194	411
60 - 89 days past due	137	149
Total Past Due	331	560
Loans Not Past Due	57,875	55,399
Non accrual loans	$278	$375

Loans_Risk_Category_of_Loans_b

Loans - Risk Category of Loans by Class of Loans, Excluding Purchased Credit Impaired Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$604,811	$589,068
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	58,484	56,334
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,086,032	2,028,646
Pass [Member] \| Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	575,010	558,312
Pass [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,088,608	1,063,979
Pass [Member] \| Land, Development, Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	73,960	65,216
Pass [Member] \| Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	290,747	285,549
Pass [Member] \| Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	57,707	55,590
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	50,871	56,434
Special Mention [Member] \| Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	7,085	7,053
Special Mention [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	31,892	34,953
Special Mention [Member] \| Land, Development, Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	7,703	9,731
Special Mention [Member] \| Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,919	4,419
Special Mention [Member] \| Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	272	278
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	63,702	66,750
Substandard [Member] \| Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	22,716	23,703
Substandard [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	34,182	34,001
Substandard [Member] \| Land, Development, Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,523	4,055
Substandard [Member] \| Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,776	4,525
Substandard [Member] \| Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$505	$466

Loans_Investment_in_Residentia

Loans - Investment in Residential and Consumer Loans, Excluding Loans from Purchased Credit Impaired Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$604,811	$589,068
Residential Real Estate [Member] \| Performing TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	591,975	577,167
Residential Real Estate [Member] \| Nonperforming TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,836	11,901
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	58,484	56,334
Consumer and Other [Member] \| Performing TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	58,206	55,959
Consumer and Other [Member] \| Nonperforming TDRs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$278	$375

Loans_Summary_of_Total_Contrac

Loans - Summary of Total Contractually Required Principal and Interest Cash Payments, Management's Estimate of Expected Total Cash Payments and Carrying Value of Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Contractually required principal and interest	$411,235	$460,836
Non-accretable difference	-36,309	-68,757
Cash flows expected to be collected	374,926	392,079
Accretable yield	-111,658	-115,313
Carrying value of acquired loans	263,268	276,766
Allowance for loan losses	-138	-514
Carrying value less allowance for loan losses	$263,130	$276,252

Loans_Summary_of_Changes_in_To

Loans - Summary of Changes in Total Contractually Required Principal and Interest Cash Payments (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Contractually required principal and interest, beginning balance			$460,836
Non-accretable difference, beginning balance			-68,757
Cash flows expected to be collected, beginning balance			392,079
Accretable yield, beginning balance			-115,313
Carrying value of acquired loans, beginning balance			276,766
Contractually required principal and interest, ending balance	411,235		460,836
Non-accretable difference, ending balance	-36,309		-68,757
Cash flows expected to be collected, ending balance	374,926		392,079
Accretable yield, ending balance	-111,658		-115,313
Carrying value of acquired loans, ending balance	263,268		276,766
Contractually Required Principal and Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Contractually required principal and interest, beginning balance	460,836	389,537
Effect of acquisitions		48,289
All other adjustments	-49,601	-23,441
Contractually required principal and interest, ending balance	411,235	414,385
Non-Accretable Difference [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-accretable difference, beginning balance	-68,757	-55,304
Effect of acquisitions		-11,766
All other adjustments	32,448	11,008
Non-accretable difference, ending balance	-36,309	-56,062
Cash Flows Expected to be Collected [Member]
Financing Receivable, Recorded Investment [Line Items]
Cash flows expected to be collected, beginning balance	392,079	334,233
Effect of acquisitions		36,523
All other adjustments	-17,153	-12,433
Cash flows expected to be collected, ending balance	374,926	358,323
Accretable Yield [Member]
Financing Receivable, Recorded Investment [Line Items]
Accretable yield, beginning balance	-115,313	-102,812
Effect of acquisitions		-6,455
Income accretion	9,930	8,231
All other adjustments	-6,275	-6,487
Accretable yield, ending balance	-111,658	-107,523
Carry Value of Acquired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Carrying value of acquired loans, beginning balance	276,766	231,421
Effect of acquisitions		30,068
Income accretion	9,930	8,231
All other adjustments	-23,428	-18,920
Carrying value of acquired loans, ending balance	$263,268	$250,800

FDIC_Indemnification_Asset_Add

FDIC Indemnification Asset - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2010
	Bank	Mar. 31, 2015	Dec. 31, 2014	Bank	Bank
Fdic Indemnification Asset [Abstract]
Number of acquisitions under agreement	2			2	3
Impairment (recovery) of loan pool		($239)	($116)

FDIC_Indemnification_Asset_FDI

FDIC Indemnification Asset - FDIC Loss Share Indemnification Asset (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fdic Loss Share Indemnification Asset [Abstract]
Beginning of the year	$49,054	$73,877
Effect of acquisition		2,636
Amortization, net	-4,316	-20,664
Indemnification revenue	906	3,098
Indemnification of foreclosure expense	-157	237
Proceeds from FDIC	-3,654	-10,014
Impairment (recovery) of loan pool	-239	-116
Period end balance	$41,594	$49,054

FDIC_Indemnification_Asset_FDI1

FDIC Indemnification Asset - FDIC Activity In True-up Payment Liability (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fdic Loss Share Indemnification Asset [Abstract]
Beginning of the year	$1,205	$444
Effect of acquisition		682
True-up liability accrual	34	79
Period end balance	$1,239	$1,205

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $)	0 Months Ended
In Thousands, unless otherwise specified	Apr. 08, 2015	Apr. 16, 2015
SouthBank [Member]
Subsequent Event [Line Items]
Branch real estate		$1,950
Deposits		18,500
Premium on Deposits Assumed		100
NexBank SSB [Member] \| Revolving Loans [Member]
Subsequent Event [Line Items]
Revolving loans aggregate principal amount	$25,000
Revolving loan interest rate description	90 day LIBOR plus 3.5% per annum
Revolving loans, frequency of commitment fee payment	quarterly
Revolving loans, date of first commitment fee payment	1-Dec-15
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Revolving loans, maturity date	1-Apr-18
NexBank SSB [Member] \| Revolving Loans [Member] \| 90 day LIBOR [Member]
Subsequent Event [Line Items]
Debt instrument, basis spread on variable rate	3.50%