Loans Receivable, Net - Collateral-Dependent Loans (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Collateral Dependent Loans
Collateral dependent loans	$ 22,985
Business assets
Collateral Dependent Loans
Collateral dependent loans	5,080
Residential real estate
Collateral Dependent Loans
Collateral dependent loans	4,201
Other real estate
Collateral Dependent Loans
Collateral dependent loans	13,572
Other
Collateral Dependent Loans
Collateral dependent loans	132
Residential Real Estate
Collateral Dependent Loans
Collateral dependent loans	1,567
Residential Real Estate | Business assets
Collateral Dependent Loans
Collateral dependent loans	0
Residential Real Estate | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	1,536
Residential Real Estate | Other real estate
Collateral Dependent Loans
Collateral dependent loans	31
Residential Real Estate | Other
Collateral Dependent Loans
Collateral dependent loans	0
Commercial Real Estate
Collateral Dependent Loans
Collateral dependent loans	13,622
Commercial Real Estate | Business assets
Collateral Dependent Loans
Collateral dependent loans	84
Commercial Real Estate | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	658
Commercial Real Estate | Other real estate
Collateral Dependent Loans
Collateral dependent loans	12,880
Commercial Real Estate | Other
Collateral Dependent Loans
Collateral dependent loans	0
Other Commercial
Collateral Dependent Loans
Collateral dependent loans	5,636
Other Commercial | Business assets
Collateral Dependent Loans
Collateral dependent loans	4,996
Other Commercial | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	0
Other Commercial | Other real estate
Collateral Dependent Loans
Collateral dependent loans	624
Other Commercial | Other
Collateral Dependent Loans
Collateral dependent loans	16
Home Equity
Collateral Dependent Loans
Collateral dependent loans	1,975
Home Equity | Business assets
Collateral Dependent Loans
Collateral dependent loans	0
Home Equity | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	1,954
Home Equity | Other real estate
Collateral Dependent Loans
Collateral dependent loans	21
Home Equity | Other
Collateral Dependent Loans
Collateral dependent loans	0
Other Consumer
Collateral Dependent Loans
Collateral dependent loans	185
Other Consumer | Business assets
Collateral Dependent Loans
Collateral dependent loans	0
Other Consumer | Residential real estate
Collateral Dependent Loans
Collateral dependent loans	53
Other Consumer | Other real estate
Collateral Dependent Loans
Collateral dependent loans	16
Other Consumer | Other
Collateral Dependent Loans
Collateral dependent loans	$ 116