Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 1,349	$ 4,710
Mortgage servicing rights	3,106	1,843
Foreclosed assets	95	62
Long-lived assets	1,316	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired 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]
Collateral Dependent Impaired 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]
Collateral Dependent Impaired Loans	1,349	4,710
Mortgage servicing rights	3,106	1,843
Foreclosed assets	95	62
Long-lived assets	1,316	0
Gain (Loss) on Investments [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Loans Nonrecurring Basis Gains Losses	(340)	(2,043)
Mortgage Servicing Rights Nonrecurring Basis Gains Losses	7	(1)
Foreclosed Assets Nonrecurring Basis Gains Losses	(29)	(36)
Long Lived Assets Nonrecurring Basis Gains Losses	$ (193)	$ 0