Fair Value Measurement Of Assets And Liabilities (Assets Measured At Fair Value On A Non-Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	$ 15,900		$ 20,000
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent impaired loans	66,854	[1]	53,330	[1]
Loan servicing rights	9,078		11,328
Foreclosed assets	$ 15,874		$ 19,986

[1] Excludes pooled covered loans acquired in the FDIC-assisted transactions.