Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Interest and dividend income:
Interest and fees on loans	$ 267,692	$ 275,599	$ 301,163
Interest and dividends on:
Obligations of U.S. Government, its agencies and other securities	76,839	90,558	87,711
Obligations of states and political subdivisions	786	1,417	2,171
Other interest income	200	116	294
Total interest and dividend income	345,517	367,690	391,339
Interest on deposits:
Demand and savings deposits	5,753	10,815	22,633
Time deposits	36,212	53,805	67,259
Interest on short-term borrowings	1,181	3,209	14,469
Interest on long-term debt	28,327	26,370	31,105
Total interest expense	71,473	94,199	135,466
Net interest income	274,044	273,491	255,873
Provision for loan losses	87,080	68,821	70,487
Net interest income after provision for loan losses	186,964	204,670	185,386
Other income:
Income from fiduciary activities	13,874	12,468	13,937
Service charges on deposit accounts	19,717	21,985	24,296
Net gains on sales of securities	11,864	7,340	1,115
Other service income	13,816	18,767	8,882
Checkcard fee income	11,177	9,339	8,695
Bank owned life insurance income	4,978	5,050	5,102
ATM fees	2,951	3,082	3,063
OREO devaluations	(13,206)	(6,818)	(2,948)
Net gain on sale of credit card portfolio			7,618
Income from sale of merchant processing			4,200
Other	9,709	9,977	10,874
Total other income	74,880	81,190	84,834
Other expense:
Salaries and employee benefits	98,315	101,225	99,018
Goodwill impairment charge			54,986
Data processing fees	5,728	5,674	7,121
Professional fees and services	19,972	15,935	12,801
Net occupancy expense of bank premises	11,510	11,552	11,534
Amortization of intangibles	3,422	3,746	4,025
Furniture and equipment expense	10,435	9,734	9,756
Insurance	8,983	12,072	2,322
Marketing	3,656	3,775	4,525
Postage and telephone	6,648	6,903	7,167
State taxes	3,171	3,206	2,989
Other	15,267	14,903	18,257
Total other expense	187,107	188,725	234,501
Income before income taxes	74,737	97,135	35,719
Income taxes	16,636	22,943	22,011
Net income	58,101	74,192	13,708
Preferred stock dividends and accretion	5,807	5,762	142
Income available to common shareholders	$ 52,294	$ 68,430	$ 13,566
Earnings per common share:
Basic	$ 3.45	$ 4.82	$ 0.97
Diluted	$ 3.45	$ 4.82	$ 0.97