Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Fair Value [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	$ 1,900	$ 19,579
Mortgage servicing rights	503	686
Foreclosed assets	0	330
Long-lived assets	0	4,647
Fair Value, Inputs, Level 1 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	0	0
Mortgage servicing rights	0	0
Foreclosed assets	0	0
Long-lived assets	0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans	1,900	19,579
Mortgage servicing rights	503	686
Foreclosed assets	0	330
Long-lived assets	0	4,647
Total Gains (Losses) Recognized During The Period [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans Nonrecurring Basis Gains Losses	(659)	(1,208)
Mortgage Servicing Rights Nonrecurring Basis Gains Losses	57	40
Foreclosed Assets Nonrecurring Basis Gains Losses	0	(50)
Long Lived Assets Nonrecurring Basis Gains Losses	$ 0	$ (3,000)