Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
INTEREST INCOME
Interest and fees on loans and leases	$ 869,433	$ 763,803	$ 398,214
Interest and dividends on investment securities:
Taxable	47,842	45,784	34,146
Exempt from federal income tax	9,647	10,345	8,898
Dividends	708	325	252
Interest on temporary investments and interest bearing deposits	2,236	2,264	1,336
Total interest income	929,866	822,521	442,846
INTEREST EXPENSE
Interest on deposits	29,839	23,815	20,755
Interest on securities sold under agreement to repurchase	173	346	141
Interest on term debt	14,470	12,793	9,248
Interest on junior subordinated debentures	13,750	11,739	7,737
Total interest expense	58,232	48,693	37,881
Net interest income	871,634	773,828	404,965
PROVISION FOR LOAN AND LEASE LOSSES	36,589	40,241	10,716
Net interest income after provision for loan and lease losses	835,045	733,587	394,249
NON-INTEREST INCOME
Service charges on deposits	59,740	54,700	30,952
Brokerage revenue	18,481	18,133	14,736
Residential mortgage banking revenue, net	124,722	77,265	78,885
Gain on investment securities, net	2,922	2,904	209
Gain on loan sales, net	22,380	15,113	2,744
Loss on junior subordinated debentures carried at fair value	(6,306)	(5,090)	(2,197)
Change in FDIC indemnification asset	(853)	(15,151)	(25,549)
BOLI income	8,351	6,835	3,035
Other income	46,287	26,465	20,080
Total non-interest income	275,724	181,174	122,895
NON-INTEREST EXPENSE
Salaries and employee benefits	430,936	355,379	209,991
Occupancy and equipment, net	142,975	111,263	62,067
Communications	20,615	14,728	11,974
Marketing	11,419	9,504	6,062
Services	46,379	49,086	25,483
FDIC assessments	13,480	10,998	6,954
Loss on other real estate owned, net	1,894	4,116	1,248
Intangible amortization	11,225	10,207	4,781
Merger related expenses	45,582	82,317	8,836
Other expenses	39,137	36,465	27,265
Total non-interest expense	763,642	684,063	364,661
Income before income taxes	347,127	230,698	152,483
Provision for income taxes	124,588	83,040	54,192
Net income	222,539	147,658	98,291
Dividends and undistributed earnings allocated to participating securities	357	484	788
Net earnings available to common shareholders	$ 222,182	$ 147,174	$ 97,503
Earnings per common share:
Basic earnings per common share (usd per share)	$ 1.01	$ 0.79	$ 0.87
Diluted earnings per common share (usd per share)	$ 1.01	$ 0.78	$ 0.87
Weighted average number of common shares outstanding:
Basic (in shares)	220,327	186,550	111,938
Diluted (in shares)	221,045	187,544	112,176