Premises and Equipment (Schedule of Premises and Equipment) (Details) (USD $) In Thousands, unless otherwise specified													12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Land	Dec. 31, 2012 Land	Dec. 31, 2013 Buildings	Dec. 31, 2012 Buildings	Dec. 31, 2013 Equipment	Dec. 31, 2012 Equipment	Dec. 31, 2013 Leasehold improvements	Dec. 31, 2012 Leasehold improvements	Dec. 31, 2013 Software	Dec. 31, 2012 Software	Dec. 31, 2013 Minimum Buildings	Dec. 31, 2013 Minimum Equipment	Dec. 31, 2013 Minimum Leasehold improvements	Dec. 31, 2013 Minimum Software	Dec. 31, 2013 Maximum Buildings	Dec. 31, 2013 Maximum Equipment	Dec. 31, 2013 Maximum Leasehold improvements	Dec. 31, 2013 Maximum Software
Premises and Equipment [Line Items]
Premises and Equipment, gross	$ 639,537	$ 464,484	$ 64,810	$ 46,118	$ 310,345	$ 200,578	$ 156,521	$ 125,342	$ 23,872	$ 20,228	$ 83,989	$ 72,218
Less accumulated depreciation and amortization	312,483	283,335
Premises and Equipment, net	$ 327,054	$ 181,149
Property, Plant and Equipment, Estimated Useful Lives													10	3	1	3	35	15	20	7