Fair Value Disclosures [Text Block]: Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale	$ 419,284	$ 384,974
Equity Securities, FV-NI	3,760	3,747
Corporate Debt Securities
Debt Securities, Available-for-sale	175,874	162,023
Collateralized Mortgage Backed Securities
Debt Securities, Available-for-sale	4,993	5,382
US Treasury Securities
Debt Securities, Available-for-sale	51,332	50,549
US Government-sponsored Enterprises Debt Securities
Debt Securities, Available-for-sale	5,796	6,123
US States and Political Subdivisions Debt Securities
Debt Securities, Available-for-sale	176,056	154,008
Debt Security, Government, Non-US
Debt Securities, Available-for-sale	5,233	6,889
Fair Value, Recurring
Debt Securities, Available-for-sale	419,284	384,974
Equity Securities, FV-NI	3,760	3,747
Assets, Fair Value Disclosure	423,044	388,721
Fair Value, Recurring | Corporate Debt Securities
Debt Securities, Available-for-sale	175,874	162,023
Fair Value, Recurring | Collateralized Mortgage Backed Securities
Debt Securities, Available-for-sale	4,993	5,382
Fair Value, Recurring | US Treasury Securities
Debt Securities, Available-for-sale	51,332	50,549
Fair Value, Recurring | US Government-sponsored Enterprises Debt Securities
Debt Securities, Available-for-sale	5,796	6,123
Fair Value, Recurring | US States and Political Subdivisions Debt Securities
Debt Securities, Available-for-sale	176,056	154,008
Fair Value, Recurring | Debt Security, Government, Non-US
Debt Securities, Available-for-sale	5,233	6,889
Fair Value, Recurring | Common Stock
Equity Securities, FV-NI	2,907	2,864
Fair Value, Recurring | Nonredeemable Preferred Stock
Equity Securities, FV-NI	853	883
Fair Value, Inputs, Level 1 | Fair Value, Recurring
Debt Securities, Available-for-sale	0	0
Equity Securities, FV-NI	3,760	3,747
Assets, Fair Value Disclosure	3,760	3,747
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Corporate Debt Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Collateralized Mortgage Backed Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | US Treasury Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | US Government-sponsored Enterprises Debt Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | US States and Political Subdivisions Debt Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Debt Security, Government, Non-US
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Common Stock
Equity Securities, FV-NI	2,907	2,864
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Nonredeemable Preferred Stock
Equity Securities, FV-NI	853	883
Fair Value, Inputs, Level 2 | Fair Value, Recurring
Debt Securities, Available-for-sale	417,899	383,445
Equity Securities, FV-NI	0	0
Assets, Fair Value Disclosure	417,899	383,445
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Corporate Debt Securities
Debt Securities, Available-for-sale	175,874	162,023
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Collateralized Mortgage Backed Securities
Debt Securities, Available-for-sale	4,993	5,382
Fair Value, Inputs, Level 2 | Fair Value, Recurring | US Treasury Securities
Debt Securities, Available-for-sale	51,332	50,549
Fair Value, Inputs, Level 2 | Fair Value, Recurring | US Government-sponsored Enterprises Debt Securities
Debt Securities, Available-for-sale	5,796	6,123
Fair Value, Inputs, Level 2 | Fair Value, Recurring | US States and Political Subdivisions Debt Securities
Debt Securities, Available-for-sale	174,671	152,479
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Debt Security, Government, Non-US
Debt Securities, Available-for-sale	5,233	6,889
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Common Stock
Equity Securities, FV-NI	0	0
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Nonredeemable Preferred Stock
Equity Securities, FV-NI	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring
Debt Securities, Available-for-sale	1,385	1,529
Equity Securities, FV-NI	0	0
Assets, Fair Value Disclosure	1,385	1,529
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Corporate Debt Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Collateralized Mortgage Backed Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | US Treasury Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | US Government-sponsored Enterprises Debt Securities
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | US States and Political Subdivisions Debt Securities
Debt Securities, Available-for-sale	1,385	1,529
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Debt Security, Government, Non-US
Debt Securities, Available-for-sale	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Common Stock
Equity Securities, FV-NI	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Nonredeemable Preferred Stock
Equity Securities, FV-NI	$ 0	$ 0