Fair Value Disclosures, Quantitative Information About Level 3 (Details)		9 Months Ended		12 Months Ended
		Sep. 30, 2020 USD ($)		Dec. 31, 2019 USD ($)
Installment [Member]
Ranges and Weighted Average [Abstract]
Total Impaired collateral value		$ 270,000		$ 140,000
Recurring Basis [Member] | Capitalized Mortgage Loan Servicing Rights [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Servicing asset fair value		$ 15,403,000		$ 19,171,000
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		0.0035		0.0173
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		58		66
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		0.0734		0.0701
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		316
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		0.4016		0.6934
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		79		81
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		0.1010		0.1014
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		0.0035		0.0173
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		0.2201		0.1496
Nonrecurring Basis [Member] | Impaired Loans Commercial [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Impaired loans fair value		$ 8,689,000		$ 971,000
Nonrecurring Basis [Member] | Impaired Loans Commercial [Member] | Income Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Capitalization Rate [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		0.095
Nonrecurring Basis [Member] | Impaired 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		(0.400)		(0.480)
Nonrecurring Basis [Member] | Impaired 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		0.750		0.192
Nonrecurring Basis [Member] | Impaired 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		0.045		(0.056)
Nonrecurring Basis [Member] | Impaired Loans Commercial [Member] | Weighted Average [Member] | Income Approach [Member] | Significant Un-observable Inputs (Level 3) [Member] | Capitalization Rate [Member]
Ranges and Weighted Average [Abstract]
Impaired loans measurement input		0.095
Nonrecurring Basis [Member] | Impaired Loans Mortgage and Installment [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Impaired loans fair value	[1]	$ 1,386,000		$ 2,467,000
Nonrecurring Basis [Member] | Impaired 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		(0.120)	[1]	(0.252)
Nonrecurring Basis [Member] | Impaired 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]	0.492
Nonrecurring Basis [Member] | Impaired 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		0.040	[1]	0.115
Nonrecurring Basis [Member] | Other Real Estate Mortgage [Member] | Significant Un-observable Inputs (Level 3) [Member]
Asset Fair Value [Abstract]
Other real estate fair value				$ 59,000
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				(0.116)
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				0.050
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				(0.051)

[1] In addition to the valuation techniques and unobservable inputs discussed above, at September 30, 2020 and December 31, 2019 certain impaired collateral dependent installment loans totaling approximately $0.27 million and $0.14 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.