Investments - Summary of Significant Credit Quality Indicators Measured at Amortized Cost (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 86,325
2020	56,812
2019	93,022
2018	0
2017	0
Prior	2,379
Total Amortized Costs Basis	238,538
LTV less than 60%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	360
2020	0
2019	28,000
2018	0
2017	0
Prior	730
Total Amortized Costs Basis	29,090
LTV 60%-70%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	36,825
2020	0
2019	0
2018	0
2017	0
Prior	972
Total Amortized Costs Basis	37,797
LTV greater than 70%
Financing Receivable, Credit Quality Indicator [Line Items]
2021	49,140
2020	56,812
2019	65,022
2018	0
2017	0
Prior	677
Total Amortized Costs Basis	$ 171,651