Fair Value Disclosures, Quantitative Information About Level 3 (Details)		Mar. 31, 2021 USD ($)		Dec. 31, 2020 USD ($)
Installment [Member]
Asset Fair Value [Abstract]
Collateral dependent loans fair value		$ 110,000		$ 160,000
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Servicing asset fair value		$ 23,530,000		$ 16,904,000
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Float Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.0105		0.0043
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Minimum [Member] | Significant Un-observable Inputs (Level 3) [Member] | Cost to Service [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		69		69
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Minimum [Member] | Significant Un-observable Inputs (Level 3) [Member] | Ancillary Income [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		20		20
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Minimum [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Discount Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.1000		0.1000
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Minimum [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Prepayment Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.0748		0.0792
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Maximum [Member] | Significant Un-observable Inputs (Level 3) [Member] | Cost to Service [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		215		289
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Maximum [Member] | Significant Un-observable Inputs (Level 3) [Member] | Ancillary Income [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		37		37
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Maximum [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Discount Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.1300		0.1300
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Maximum [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Prepayment Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.5027		0.6470
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Weighted Average [Member] | Significant Un-observable Inputs (Level 3) [Member] | Cost to Service [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		78		79
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Weighted Average [Member] | Significant Un-observable Inputs (Level 3) [Member] | Ancillary Income [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		22		22
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Weighted Average [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Discount Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.1009		0.1009
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Weighted Average [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Float Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.0105		0.0043
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Weighted Average [Member] | Present Value of Net Servicing Revenue [Member] | Significant Un-observable Inputs (Level 3) [Member] | Prepayment Rate [Member]
Ranges and Weighted Average [Abstract]
Servicing asset measurement input		0.1391		0.2085
Nonrecurring Basis [Member] | Collateral Dependent Loans Commercial [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Collateral dependent loans fair value		$ 1,403,000		$ 8,054,000
Nonrecurring Basis [Member] | Collateral Dependent Loans Commercial [Member] | Minimum [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		(0.310)		(0.400)
Nonrecurring Basis [Member] | Collateral Dependent Loans Commercial [Member] | Maximum [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		0.120		0.750
Nonrecurring Basis [Member] | Collateral Dependent Loans Commercial [Member] | Weighted Average [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		(0.015)		0.038
Nonrecurring Basis [Member] | Collateral Dependent Loans Mortgage and Installment [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Collateral dependent loans fair value	[1]	$ 1,513,000		$ 1,020,000
Nonrecurring Basis [Member] | Collateral Dependent Loans Mortgage and Installment [Member] | Minimum [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		(0.733)	[1]	(0.733)
Nonrecurring Basis [Member] | Collateral Dependent Loans Mortgage and Installment [Member] | Maximum [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		1.046	[1]	1.046
Nonrecurring Basis [Member] | Collateral Dependent Loans Mortgage and Installment [Member] | Weighted Average [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		(0.013)	[1]	(0.015)
Nonrecurring Basis [Member] | Other Real Estate Mortgage [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Other real estate fair value				$ 102,000
Nonrecurring Basis [Member] | Other Real Estate Mortgage [Member] | Minimum [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Other real estate measurement input				(0.131)
Nonrecurring Basis [Member] | Other Real Estate Mortgage [Member] | Maximum [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Other real estate measurement input				0.024
Nonrecurring Basis [Member] | Other Real Estate Mortgage [Member] | Weighted Average [Member] | Sales Comparison Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Adjustment for Differences Between Comparable Sales [Member]
Ranges and Weighted Average [Abstract]
Other real estate measurement input				(0.036)

[1] In addition to the valuation techniques and unobservable inputs discussed above, at March 31, 2021 and December 31, 2020 certain collateral dependent installment loans totaling approximately $0.11 million and $0.16 million, respectively are secured by collateral other than real estate.  For the majority of these loans, we apply internal discount rates to industry valuation guides.