Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income
Loans and leases	$ 164,108	$ 185,151	$ 325,142	$ 396,914
Investment securities:
Total investment securities interest and dividend income	12,447	8,119	24,195	16,603
Overnight investments	756	656	1,368	1,013
Total interest income	177,311	193,926	350,705	414,530
Interest expense
Deposits	6,006	8,997	12,831	19,310
Short-term borrowings	1,551	680	2,136	1,384
Long-term obligations	4,056	4,721	9,109	9,426
Total interest expense	11,613	14,398	24,076	30,120
Net interest income	165,698	179,528	326,629	384,410
Provision for loan and lease losses	(7,299)	(13,242)	(9,202)	(31,848)
Net interest income after provision for loan and lease losses	172,997	192,770	335,831	416,258
Noninterest income
Cardholder services	13,257	12,026	25,089	23,097
Merchant services	15,035	15,245	28,556	27,731
Service charges on deposit accounts	15,265	14,883	29,705	29,882
Wealth management services	15,815	15,097	30,695	29,612
Fees from processing services	5,682	5,051	10,543	10,670
Other service charges and fees	4,250	3,966	8,194	7,732
Mortgage income	1,210	3,669	2,165	7,457
Insurance commissions	2,253	2,394	5,540	5,374
ATM income	1,260	1,314	2,462	2,482
Adjustments for FDIC receivable for loss share agreements	(15,295)	(14,439)	(27,644)	(38,492)
Other	6,650	5,789	11,258	16,963
Total noninterest income	65,382	64,995	126,563	122,508
Noninterest expense
Salaries and wages	82,683	75,802	162,557	151,921
Employee benefits	19,772	23,228	39,872	48,247
Occupancy expense	20,937	18,464	41,362	37,273
Equipment expense	19,686	18,698	38,477	37,644
FDIC insurance expense	2,640	2,423	5,276	5,089
Foreclosure-related expenses	3,858	3,467	9,268	7,772
Other	49,444	46,485	93,238	94,976
Total noninterest expense	199,020	188,567	390,050	382,922
Income before income taxes	39,359	69,198	72,344	155,844
Income taxes	12,809	25,292	23,428	56,353
Net income	$ 26,550	$ 43,906	$ 48,916	$ 99,491
Average shares outstanding (in shares)	9,618,941	9,618,941	9,618,941	9,618,963
Net income per share	$ 2.76	$ 4.56	$ 5.09	$ 10.34