Deposit Accounts - Interest Expense on Deposit Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest expense on deposit accounts
Checking accounts	$ 1,270	$ 3,295	$ 2,340
Money market accounts	6,824	19,903	28,279
Savings	251	393	382
Certificates of deposit accounts	3,472	10,745	27,296
Total	$ 11,817	$ 34,336	$ 58,297