Borrowed Funds - Interest Expense on Borrowed Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances [Line Items]
Total interest expense on borrowed funds	$ 165	$ 762	$ 6,452
Federal Home Loan Bank advances
Federal Home Loan Bank, Advances [Line Items]
Total interest expense on borrowed funds	163	190	2,406
Escrow deposits of borrowers
Federal Home Loan Bank, Advances [Line Items]
Total interest expense on borrowed funds	2	2	4
Interest rate swap collateral funds
Federal Home Loan Bank, Advances [Line Items]
Total interest expense on borrowed funds	0	0	66
Federal funds purchased
Federal Home Loan Bank, Advances [Line Items]
Total interest expense on borrowed funds	$ 0	$ 570	$ 3,976