Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 2,044	$ 5,001
Loans Nonrecurring Basis Gains Losses	(550)	(1,491)
Mortgage servicing rights	3,646	2,191
Mortgage Servicing Rights Nonrecurring Basis Gains Losses	6	(2)
Foreclosed assets	75	28
Foreclosed Assets Nonrecurring Basis Gains Losses	(58)	(10)
Long-lived assets	1,834	1,871
Long Lived Assets Nonrecurring Basis Gains Losses	(343)	(956)
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	2,044	5,001
Mortgage servicing rights	3,646	2,191
Foreclosed assets	75	28
Long-lived assets	$ 1,834	$ 1,871