Fair Value - Assets and Liabilities Measured on a Non-Recurring Basis (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Collateral dependent loans held for sale
Total individually analyzed loans	$ 11,752,000	$ 106,000
Mortgage servicing rights	13,153,000	273,000
Commercial Real Estate [Member]
Collateral dependent loans held for sale
Total individually analyzed loans	4,601,000	68,000
Commercial [Member]
Collateral dependent loans held for sale
Total individually analyzed loans	7,151,000	38,000
Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans held for sale
Mortgage servicing rights	13,153,000	273,000
Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans held for sale
Total individually analyzed loans	11,752,000	106,000
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate [Member]
Collateral dependent loans held for sale
Total individually analyzed loans	4,601,000	68,000
Fair Value, Inputs, Level 3 [Member] | Commercial [Member]
Collateral dependent loans held for sale
Total individually analyzed loans	$ 7,151,000	$ 38,000