Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest income
Loans and leases	$ 219,314	$ 224,631	$ 651,160	$ 658,175
Investment securities:
Total investment securities interest and dividend income	23,395	24,020	71,139	65,136
Overnight investments	3,785	1,174	10,676	4,037
Total interest income	246,494	249,825	732,975	727,348
Interest expense
Deposits	4,457	5,216	13,717	16,379
Short-term borrowings	540	590	1,428	4,182
Long-term obligations	5,648	4,648	17,072	12,601
Total interest expense	10,645	10,454	32,217	33,162
Net interest income	235,849	239,371	700,758	694,186
Provision (credit) for loan and lease losses	7,507	107	16,912	13,618
Net interest income after provision for loan and lease losses	228,342	239,264	683,846	680,568
Noninterest income
Gain on acquisition	837	0	5,831	42,930
Cardholder services	21,537	19,588	61,949	57,203
Merchant services	25,179	22,005	71,392	62,955
Service charges on deposit accounts	23,154	23,153	66,888	67,572
Wealth management services	19,915	22,223	60,840	64,658
Securities gains (losses)	352	5,564	17,509	10,837
Other service charges and fees	7,567	6,208	21,693	17,443
Mortgage income	6,692	4,852	12,540	14,972
Insurance commissions	2,755	2,945	8,198	8,698
ATM income	1,908	1,800	5,518	5,289
Adjustments for FDIC receivable for loss share agreements	(2,773)	(4,130)	(7,673)	(9,730)
Net Impact from FDIC Loss Share Termination	0	0	16,559	0
Other	10,718	5,542	22,129	25,126
Total noninterest income	117,841	109,750	363,373	367,953
Noninterest expense
Salaries and wages	107,762	108,992	315,720	324,358
Employee benefits	26,750	27,121	79,761	86,341
Occupancy expense	24,857	22,260	74,824	73,412
Equipment expense	23,736	22,447	68,796	69,284
FDIC insurance expense	5,796	4,933	15,173	13,755
Foreclosure-related expenses	2,016	1,087	2,631	4,663
Merger-related expenses	3,764	3,679	5,187	11,249
Other	72,552	69,653	215,115	199,967
Total noninterest expense	267,233	260,172	777,207	783,029
Income before income taxes	78,950	88,842	270,012	265,492
Income taxes	27,546	32,884	97,220	97,854
Net income	$ 51,404	$ 55,958	$ 172,792	$ 167,638
Average shares outstanding (in shares)	12,010,405	12,010,405	12,010,405	12,010,405
Net income per share	$ 4.28	$ 4.66	$ 14.39	$ 13.96