Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest and Dividend Income
Loans receivable, including loan fees	$ 104,995	$ 97,454	$ 205,095	$ 190,186
Investment securities	5,346	6,708	9,120	14,284
Federal Home Loan Bank stock	1,677	421	2,258	871
Deposits with banks	368	479	847	928
Total interest and dividend income	112,386	105,062	217,320	206,269
Interest Expense
Time deposits	9,122	8,637	17,914	17,038
Other deposits	3,019	2,540	5,793	4,831
Securities sold under agreements to repurchase	3,934	6,943	7,859	13,873
Advances from Federal Home Loan Bank	117	497	210	696
Long-term debt	1,440	828	2,864	1,556
Total interest expense	17,632	19,445	34,640	37,994
Net interest income before reversal for credit losses	94,754	85,617	182,680	168,275
Reversal for loan losses	(2,150)	(3,700)	(7,150)	(3,700)
Net interest income after reversal for credit losses	96,904	89,317	189,830	171,975
Non-Interest Income
Securities (losses)/gains, net	(3,332)	506	(3,353)	6,466
Letters of credit commissions	1,391	1,520	2,659	2,988
Depository service fees	1,293	1,306	2,594	2,669
Other operating income	6,267	5,689	12,268	11,457
Total non-interest income	5,619	9,021	14,168	23,580
Non-Interest Expense
Salaries and employee benefits	24,463	23,391	47,079	46,842
Occupancy expense	3,986	3,896	8,007	7,758
Computer and equipment expense	2,292	2,534	4,794	4,836
Professional services expense	6,287	5,263	11,639	10,419
FDIC and State assessments	2,244	2,277	4,504	4,431
Marketing expense	1,321	1,519	2,141	2,083
Other real estate owned (income)/expense	(1,786)	(377)	(1,303)	382
Amortization of investments in low income housing and alternative energy partnerships	5,467	1,018	7,850	3,454
Amortization of core deposit intangibles	147	124	324	296
Costs associated with debt redemption		(555)		2,821
Other operating expense	3,164	3,423	6,681	7,259
Total non-interest expense	47,585	42,513	91,716	90,581
Income before income tax expense	54,938	55,825	112,282	104,974
Income tax expense	9,738	20,741	31,102	38,631
Net income	45,200	35,084	81,180	66,343
Other comprehensive income, net of tax
Unrealized holding (loss)/gain on securities available-for-sale	(6,395)	13,750	104	24,844
Less: reclassification adjustments included in net income	(1,931)	293	(1,943)	3,748
Unrealized holding gain/(loss) on cash flow hedge derivatives	2,328	(263)	740	(263)
Total other comprehensive (loss)/gain, net of tax	(2,136)	13,194	2,787	20,833
Total comprehensive income	$ 43,064	$ 48,278	$ 83,967	$ 87,176
Net income per common share:
Basic (in Dollars per share)	$ 0.57	$ 0.44	$ 1.02	$ 0.83
Diluted (in Dollars per share)	0.56	0.44	1.01	0.83
Cash dividends paid per common share (in Dollars per share)	$ 0.14	$ 0.07	$ 0.24	$ 0.12
Average common shares outstanding
Basic (in Shares)	79,939,197	79,642,993	79,887,699	79,619,506
Diluted (in Shares)	80,698,994	80,046,471	80,505,265	80,042,946