Premises and Equipment (Summary of Premises and Equipment) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]
Land	$ 13,777,000	$ 15,281,000
Buildings and improvements	97,586,000	95,775,000
Leasehold improvements	74,127,000	73,253,000
Fixtures and equipment	70,819,000	69,530,000
Data processing and software	162,693,000	162,833,000
Total premises and equipment	419,002,000	416,672,000
Less accumulated depreciation and amortization	(297,397,000)	(282,110,000)
Premises and equipment, net	121,605,000	134,562,000
Depreciation of premises and equipment	$ 31,100,000	$ 34,100,000	$ 34,900,000