Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest and Loan Fee Income
Loans	$ 102,626	$ 130,820	$ 160,673
Investment securities available for sale	21,822	19,810	21,594
Investment securities held to maturity	29,948	32,734	25,712
Total Interest and Loan Fee Income	154,396	183,364	207,979
Interest Expense
Deposits	3,348	4,283	6,805
Short-term borrowed funds	77	77	216
Federal Home Loan Bank advances	480	483	520
Term repurchase agreement	98	99	39
Debt financing	668	802	802
Total Interest Expense	4,671	5,744	8,382
Net Interest Income	149,725	177,620	199,597
Provision for Loan Losses	8,000	11,200	11,200
Net Interest Income After Provision for Loan Losses	141,725	166,420	188,397
Noninterest Income
Service charges on deposit accounts	25,693	27,691	29,523
Merchant processing services	9,031	9,734	9,436
Debit card fees	5,829	5,173	4,956
Other service fees	2,846	2,801	2,827
ATM processing fees	2,758	3,396	3,815
Trust fees	2,313	2,078	1,887
Financial services commissions	831	689	423
Loss on sale of securities		(1,287)
Other	7,710	6,747	7,230
Total Noninterest Income	57,011	57,022	60,097
Noninterest Expense
Salaries and related benefits	56,633	57,388	58,501
Occupancy	15,137	15,460	16,209
Outsourced data processing services	8,548	8,531	8,844
Amortization of identifiable intangibles	4,704	5,368	5,975
Furniture and equipment	3,869	3,775	3,837
Professional fees	3,057	3,217	4,802
Courier service	2,868	3,117	3,342
Other real estate owned	1,035	1,235	2,458
Settlements			2,100
Other	16,763	18,794	21,610
Total Noninterest Expense	112,614	116,885	127,678
Income Before Income Taxes	86,122	106,557	120,816
Provision for income taxes	18,945	25,430	32,928
Net Income	$ 67,177	$ 81,127	$ 87,888
Average Common Shares Outstanding (in Shares)	26,826	27,654	28,628
Diluted Average Common Shares Outstanding (in Shares)	26,877	27,699	28,742
Per Common Share Data
Basic earnings (in Dollars per share)	$ 2.50	$ 2.93	$ 3.07
Diluted earnings (in Dollars per share)	$ 2.50	$ 2.93	$ 3.06
Dividends paid (in Dollars per share)	$ 1.49	$ 1.48	$ 1.45