Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest and Fee Income
Loans	$ 130,820	$ 160,673	$ 177,224
Money market assets and funds sold			2
Investment securities available for sale	19,810	21,594	16,766
Investment securities held to maturity	32,734	25,712	27,163
Total Interest and Fee Income	183,364	207,979	221,155
Interest Expense
Deposits	4,283	6,805	8,718
Short-term borrowed funds	77	216	463
Federal Home Loan Bank advances	483	520	437
Term repurchase agreement	99	39	1,528
Debt financing and notes payable	802	802	1,694
Total Interest Expense	5,744	8,382	12,840
Net Interest Income	177,620	199,597	208,315
Provision for Loan Losses	11,200	11,200	11,200
Net Interest Income After Provision for Loan Losses	166,420	188,397	197,115
Noninterest Income
Service charges on deposit accounts	27,691	29,523	33,517
Merchant processing services	9,734	9,436	9,057
Debit card fees	5,173	4,956	4,888
ATM processing fees	3,396	3,815	3,848
Trust fees	2,078	1,887	1,705
Financial services commissions	689	423	747
Loss on sale of securities	(1,287)
Gain on acquisition			178
Other	9,548	10,057	7,514
Total Noninterest Income	57,022	60,097	61,454
Noninterest Expense
Salaries and related benefits	57,388	58,501	61,748
Occupancy	15,460	16,209	15,633
Outsourced data processing services	8,531	8,844	8,957
Amortization of identifiable intangibles	5,368	5,975	6,333
Furniture and equipment	3,775	3,837	4,325
Professional fees	3,217	4,802	3,376
Courier service	3,117	3,342	3,495
Other Real Estate Owned	1,235	2,458	895
Settlements		2,100	43
Other	18,794	21,610	22,342
Total Noninterest Expense	116,885	127,678	127,147
Income Before Income Taxes	106,557	120,816	131,422
Provision for income taxes	25,430	32,928	36,845
Net Income	$ 81,127	$ 87,888	$ 94,577
Average Common Shares Outstanding (in Shares)	27,654	28,628	29,166
Diluted Average Common Shares Outstanding (in Shares)	27,699	28,742	29,471
Per Common Share Data
Basic earnings (in Dollars per share)	$ 2.93	$ 3.07	$ 3.24
Diluted earnings (in Dollars per share)	$ 2.93	$ 3.06	$ 3.21
Dividends paid (in Dollars per share)	$ 1.48	$ 1.45	$ 1.44