Fair Value Measurements (Schedule of Fair Value Disclosures Measured On Nonrecurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Collateral Dependent Impaired Loans	$ 124	$ 129
Loans Nonrecurring Basis Gains (Losses)	(16)	(170)
Mortgage servicing rights	6,768	6,341
Mortgage Servicing Rights Nonrecurring Basis Gains (Losses)	(1,056)	(260)
Long-lived assets	0	134
Long Lived Assets Nonrecurring Basis Gains (Losses)	0	(14)
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
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
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	124	129
Mortgage servicing rights	6,768	6,341
Long-lived assets	$ 0	$ 134