Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest Income
Loans	$ 127,737	$ 114,820	$ 246,423	$ 227,185
Investment securities	13,010	10,527	24,766	21,011
Other short-term investments	1,341	1,169	2,244	2,019
Total interest income	142,088	126,516	273,433	250,215
Interest Expense
Deposits	8,032	3,729	14,211	6,938
Borrowed funds	3,513	2,099	6,992	4,293
Senior and subordinated debt	3,140	3,105	6,264	6,204
Total interest expense	14,685	8,933	27,467	17,435
Net interest income	127,403	117,583	245,966	232,780
Provision for loan losses	11,614	8,239	26,795	13,157
Net interest income after provision for loan losses	115,789	109,344	219,171	219,623
Noninterest Income
Service charges on deposit accounts	12,058	12,153	23,710	23,518
Wealth management fees	10,981	10,525	21,939	20,185
Card-based fees, net	4,394	8,832	8,327	16,948
Capital market products income	2,819	2,217	4,377	3,593
Mortgage banking income	1,736	1,645	4,133	3,533
Other service charges, commissions, and fees	2,838	5,856	5,386	11,298
Net securities gains	0	284	0	284
Other income	2,121	3,433	4,592	5,537
Total noninterest income	36,947	44,945	72,464	84,896
Noninterest Expense
Salaries and employee benefits	57,932	54,575	114,719	110,347
Net occupancy and equipment expense	13,651	12,485	27,424	24,810
Professional services	8,298	9,112	15,878	17,575
Technology and related costs	4,837	4,485	9,608	8,918
Net OREO expense	(256)	1,631	812	3,331
Other expenses	13,939	16,289	25,542	31,673
Delivering Excellence implementation costs	15,015	0	15,015	0
Acquisition and integration related expenses	0	1,174	0	19,739
Total noninterest expense	113,416	99,751	208,998	216,393
Income before income tax expense	39,320	54,538	82,637	88,126
Income tax expense	9,720	19,588	19,527	30,321
Net income	$ 29,600	$ 34,950	$ 63,110	$ 57,805
Per Common Share Data
Basic earnings per common share (in dollars per share)	$ 0.29	$ 0.34	$ 0.61	$ 0.57
Diluted earnings per common share (in dollars per share)	0.29	0.34	0.61	0.57
Dividends declared per common share (in dollars per share)	$ 0.11	$ 0.10	$ 0.22	$ 0.19
Weighted-average common shares outstanding (in Shares)	102,159	101,743	102,041	101,081
Weighted-average diluted common shares outstanding (in Shares)	102,159	101,763	102,049	101,101