Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest income
Loans and leases	$ 215,442	$ 222,682	$ 431,846	$ 433,544
Investment securities:
Total investment securities interest and dividend income	24,702	21,806	47,744	41,116
Overnight investments	3,225	1,525	6,891	2,863
Total interest income	243,369	246,013	486,481	477,523
Interest expense
Deposits	4,601	5,534	9,260	11,163
Short-term borrowings	454	1,658	888	3,592
Long-term obligations	6,125	4,171	11,424	7,953
Total interest expense	11,180	11,363	21,572	22,708
Net interest income	232,189	234,650	464,909	454,815
Provision (credit) for loan and lease losses	4,562	7,719	9,405	13,511
Net interest income after provision for loan and lease losses	227,627	226,931	455,504	441,304
Noninterest income
Gain on acquisition	3,290	0	4,994	42,930
Cardholder services	21,054	19,214	40,412	37,615
Merchant services	24,236	22,070	46,213	40,950
Service charges on deposit accounts	21,884	22,361	43,734	44,419
Wealth management services	21,291	21,555	40,925	42,435
Securities gains (losses)	12,529	147	17,157	5,273
Other service charges and fees	7,137	5,730	14,126	11,235
Mortgage income	4,537	5,571	5,848	10,120
Insurance commissions	2,265	2,456	5,443	5,753
ATM income	1,845	1,825	3,610	3,489
Adjustments for FDIC receivable for loss share agreements	(2,367)	(4,553)	(4,900)	(5,600)
Net Impact from FDIC Loss Share Termination	16,559	0	16,559	0
Other	5,990	11,074	11,411	19,584
Total noninterest income	140,250	107,450	245,532	258,203
Noninterest expense
Salaries and wages	104,059	109,895	207,958	215,366
Employee benefits	25,661	28,002	53,011	59,220
Occupancy expense	24,955	25,532	49,967	51,152
Equipment expense	22,715	23,296	45,060	46,837
FDIC insurance expense	4,588	4,551	9,377	8,822
Foreclosure-related expenses	(1,116)	1,019	615	3,576
Merger-related expenses	1,385	4,573	1,423	7,570
Other	76,056	67,823	142,563	130,314
Total noninterest expense	258,303	264,691	509,974	522,857
Income before income taxes	109,574	69,690	191,062	176,650
Income taxes	40,258	25,168	69,674	64,970
Net income	$ 69,316	$ 44,522	$ 121,388	$ 111,680
Average shares outstanding (in shares)	12,010,405	12,010,405	12,010,405	12,010,405
Net income per share	$ 5.77	$ 3.71	$ 10.11	$ 9.30