Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 6,860	$ 17,015
Private Equity Investments Nonrecurring Basis	0	1,309
Mortgage servicing rights	1,461	777
Foreclosed assets	479	850
Long-lived assets	937	8,528
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	6,860	17,015
Private Equity Investments Nonrecurring Basis	0	1,309
Mortgage servicing rights	1,461	777
Foreclosed assets	479	850
Long-lived assets	937	8,528
Gain (Loss) on Investments [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans Nonrecurring Basis Gains Losses	(1,794)	(2,797)
Private Equity Investments Nonrecurring Basis Gains Losses	0	(1,191)
Mortgage Servicing Rights Nonrecurring Basis Gains Losses	59	13
Foreclosed Assets Nonrecurring Basis Gains Losses	(193)	(275)
Long Lived Assets Nonrecurring Basis Gains Losses	$ (1,366)	$ (1,890)