Significant Accounting Policies (Details) (USD $)	12 Months Ended			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013 Branches	Dec. 31, 2012	Dec. 31, 2013 Maximum	Dec. 31, 2013 Minimum	Dec. 31, 2013 Core deposit intangibles Minimum	Dec. 31, 2013 Core deposit intangibles Maximum	Dec. 31, 2011 Decrease to Cash Flows from Operating Activities [Member]
Significant Accounting Policies [Line Items]
Total assets	$ 9,193,237,000	$ 10,319,249,000	$ 9,236,910,000
Number of Stores		173
Finite-Lived Intangible Asset, Useful Life						7 years	11 years
Derivative, Remaining Maturity				60 days	10 days
Quantifying Misstatement in Current Year Financial Statements, Amount	$ 0							$ 51,300,000