Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Fair Value [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 729	$ 7,916
Private Equity Investments Nonrecurring Basis	919	919
Mortgage servicing rights	994	843
Foreclosed assets	23	1,220
Long-lived assets	4,996	7,246
Fair Value, Inputs, Level 1 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	0	0
Private Equity Investments Nonrecurring Basis	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]
Collateral Dependent Impaired Loans	0	0
Private Equity Investments Nonrecurring Basis	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]
Collateral Dependent Impaired Loans	729	7,916
Private Equity Investments Nonrecurring Basis	919	919
Mortgage servicing rights	994	843
Foreclosed assets	23	1,220
Long-lived assets	4,996	7,246
Total Gains (Losses) Recognized During The Period [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans Nonrecurring Basis Gains Losses	(398)	(1,875)
Private Equity Investments Nonrecurring Basis Gains Losses	(1,081)	(1,081)
Mortgage Servicing Rights Nonrecurring Basis Gains Losses	15	14
Foreclosed Assets Nonrecurring Basis Gains Losses	(25)	(181)
Long Lived Assets Nonrecurring Basis Gains Losses	$ (1,742)	$ (1,408)