Purchased Loans - Changes in Restructured Loans (Details) - Purchased loans $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan
Number of Loans
Beginning balance (loans) | loan	48	54
Additional advances or loans with concessions | loan	3	13
Reclassified as performing | loan	2	1
Reclassified as nonperforming (loans) | loan	(8)	(14)
Paid in full (loans) | loan	(6)	(5)
Charge-offs (loans) | loan	(1)	(1)
Principal paydowns | loan	0	0
Ending balance (loans) | loan	38	48
Recorded Investment
Beginning balance | $	$ 8,687	$ 7,275
Additional advances or loans with concessions | $	1,419	5,378
Reclassified as performing | $	115	74
Reclassified as nonperforming | $	(2,751)	(2,563)
Paid in full | $	(1,388)	(978)
Charge-offs | $	(205)	(3)
Principal paydowns | $	(268)	(496)
Ending balance | $	$ 5,609	$ 8,687