Fair Value of Financial Instruments - Amortized Cost Basis by Year of Origination and Credit Quality Indicator (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 5,462
2019	16,799
2018	24,781
Total	47,042	$ 47,201
Current-period write-offs	0
Current-period recoveries	0
Current-period net write-offs	0
1-2 internal grade
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,462
2019	8,314
2018	18,193
Total	31,969
3-4 internal grade
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	8,485
2018	6,588
Total	15,073
5 internal grade
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
Total	0
6 internal grade
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
Total	0
7 internal grade
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
Total	$ 0