Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest income
Loans and leases	$ 231,864	$ 233,731	$ 470,001	$ 465,184
Investment securities:
U. S. Treasury	670	2,259	1,409	5,469
Government agency	4,377	4,863	8,709	9,910
Residential mortgage-backed securities	2,202	2,104	4,091	4,757
Corporate bonds	842	2,119	2,041	4,295
State, county and municipal	12	12	24	25
Other	62	200	193	459
Total investment securities interest and dividend income	8,165	11,557	16,467	24,915
Overnight investments	490	316	803	705
Total interest income	240,519	245,604	487,271	490,804
Interest expense
Deposits	15,047	27,081	31,519	56,901
Short-term borrowings	1,584	1,482	2,975	3,179
Long-term obligations	8,456	9,666	16,393	19,362
Total interest expense	25,087	38,229	50,887	79,442
Net interest income	215,432	207,375	436,384	411,362
Provision for loan and lease losses	29,667	53,977	60,382	98,396
Net interest income after provision for loan and lease losses	185,765	153,398	376,002	312,966
Noninterest income
Gain on acquisitions	0	0	0	63,474
Cardholder and merchant services	24,697	30,543	47,147	57,323
Service charges on deposit accounts	15,061	15,778	29,907	31,568
Wealth management services	14,530	14,119	28,285	27,407
Fees from processing services	7,557	7,595	16,119	14,841
Securities gains (losses)	3	(96)	(42)	(545)
Other service charges and fees	3,574	5,960	7,015	11,917
Mortgage income	237	2,530	4,848	4,845
Insurance commissions	2,238	2,280	4,994	4,814
ATM income	1,281	1,370	2,736	2,960
Adjustments for FDIC receivable for loss share agreements	(14,134)	(13,747)	(40,930)	(24,126)
Other	2,252	317	4,160	1,751
Total noninterest income	57,296	66,649	104,239	196,229
Noninterest expense
Salaries and wages	76,786	76,124	152,470	151,928
Employee benefits	20,558	18,708	40,807	38,357
Occupancy expense	18,000	18,487	36,607	36,800
Equipment expense	17,998	17,515	36,164	34,906
FDIC insurance expense	2,666	2,501	5,723	10,726
Foreclosure-related expenses	15,765	3,747	20,386	9,235
Other	43,024	50,400	85,971	95,558
Total noninterest expense	194,797	187,482	378,128	377,510
Income before income taxes	48,264	32,565	102,113	131,685
Income taxes	10,681	11,265	29,035	48,625
Net income	$ 37,583	$ 21,300	$ 73,078	$ 83,060
Average shares outstanding (in shares)	10,271,343	10,422,857	10,277,593	10,428,623
Net income per share (in dollars per share)	$ 3.66	$ 2.04	$ 7.11	$ 7.96