Loans Receivable, Net - Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Dec. 31, 2019 USD ($) Loan
TDRs that occurred during the period
Number of loans | Loan	12	16	18
Pre-modification recorded balance	$ 2,442	$ 14,945	$ 18,508
Post-modification recorded balance	$ 2,442	$ 14,945	$ 18,476
TDRs that subsequently defaulted
Number of loans | Loan		1	1
Recorded balance		$ 145	$ 106
Residential Real Estate
TDRs that occurred during the period
Number of loans | Loan	1	1	1
Pre-modification recorded balance	$ 210	$ 210	$ 117
Post-modification recorded balance	$ 210	$ 210	$ 123
TDRs that subsequently defaulted
Number of loans | Loan		0	0
Recorded balance		$ 0	$ 0
Commercial Real Estate
TDRs that occurred during the period
Number of loans | Loan	5	10	6
Pre-modification recorded balance	$ 1,473	$ 13,392	$ 8,524
Post-modification recorded balance	$ 1,473	$ 13,392	$ 8,524
TDRs that subsequently defaulted
Number of loans | Loan		1	1
Recorded balance		$ 145	$ 106
Other Commercial
TDRs that occurred during the period
Number of loans | Loan	3	4	6
Pre-modification recorded balance	$ 554	$ 1,304	$ 9,382
Post-modification recorded balance	$ 554	$ 1,304	$ 9,364
TDRs that subsequently defaulted
Number of loans | Loan		0	0
Recorded balance		$ 0	$ 0
Home Equity
TDRs that occurred during the period
Number of loans | Loan	1	1	2
Pre-modification recorded balance	$ 54	$ 39	$ 214
Post-modification recorded balance	$ 54	$ 39	$ 214
TDRs that subsequently defaulted
Number of loans | Loan		0	0
Recorded balance		$ 0	$ 0
Other Consumer
TDRs that occurred during the period
Number of loans | Loan	2	0	3
Pre-modification recorded balance	$ 151	$ 0	$ 271
Post-modification recorded balance	$ 151	$ 0	$ 251
TDRs that subsequently defaulted
Number of loans | Loan		0	0
Recorded balance		$ 0	$ 0