Loans - Past Due Financing Receivables (Details) $ in Thousands	Mar. 31, 2022 Loan	Mar. 31, 2022 USD ($)	Mar. 31, 2022 MortgageLoan	Dec. 31, 2021 Loan	Dec. 31, 2021 USD ($)	Dec. 31, 2021 MortgageLoan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans	44		0	54		0
Principal		$ 64,293			$ 81,097
Past Due 30-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans	2		1	4		1
Principal		1,174			7,165
90-179 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	2			1
Principal		3,200			930
Past Due 180 Or More Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	2			2
Principal		1,228			886
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	38			47
Principal		58,691			72,116
Total Payments Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	6			7
Principal		$ 5,602			$ 8,981