Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest income:
Loans, including fees	$ 163,982	$ 166,228
Securities-taxable	19,404	23,317
Securities-tax exempt	1,241	1,644
Federal funds sold and other short term investments	645	527
Total interest income	185,272	191,716
Interest expense:
Deposits	6,745	10,263
Short-term borrowings	1,319	1,639
Long-term debt and other interest expense	3,193	3,526
Total interest expense	11,257	15,428
Net interest income	174,015	176,288
Provision for loan losses	9,578	10,015
Net interest income after provision for loan losses	164,437	166,273
Noninterest income:
Service charges on deposit accounts	19,015	16,274
Trust fees	8,692	8,738
Bank card fees	7,483	8,464
Investment and annuity fees	4,577	4,415
ATM fees	3,575	4,334
Secondary mortgage market operations	4,383	4,002
Insurance commissions and fees	3,994	3,477
Other income	8,468	11,790
Securities gains (losses), net		12
Total noninterest income	60,187	61,506
Noninterest expense:
Compensation expense	71,351	75,584
Employee benefits	16,576	19,743
Personnel expense	87,927	95,327
Net occupancy expense	12,326	14,642
Equipment expense	5,301	7,090
Data processing expense	11,534	14,191
Professional services expense	7,946	25,102
Amortization of intangibles	7,555	8,304
Telecommunications and postage	4,028	6,158
Deposit insurance and regulatory fees	3,646	3,392
Advertising	2,177	6,690
Other expense	17,162	24,567
Total noninterest expense	159,602	205,463
Income before income taxes	65,022	22,316
Income taxes	16,446	3,821
Net income	$ 48,576	$ 18,495
Basic earnings per common share	$ 0.56	$ 0.22
Diluted earnings per common share	$ 0.56	$ 0.21
Dividends paid per share	$ 0.24	$ 0.24
Weighted avg. shares outstanding-basic	84,871	84,741
Weighted avg. shares outstanding-diluted	84,972	85,442