Unpaid Claims - Schedule of Activity in the Liability for Unpaid Claims and Claims Adjustment Expense (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Roll Forward In Liability For Unpaid Claims And Claims Adjustment Expense [Abstract] | ||||
| Gross balance, beginning of year | $ 103,976,000 | $ 77,886,000 | $ 77,886,000 | $ 54,004,000 |
| Less: reinsurance recoverable, beginning of year | (12,344,000) | |||
| Net balance, beginning of year | 77,886,000 | 77,886,000 | 41,660,000 | |
| Beginning of period balance - gross and net | 103,976,000 | 77,886,000 | 77,886,000 | |
| Incurred related to: | ||||
| Current year | 213,147,000 | 146,440,000 | 604,183,000 | 453,423,000 |
| Prior years | 1,285,000 | (112,000) | (13,715,000) | (2,778,000) |
| Total incurred | 214,432,000 | 146,328,000 | 590,468,000 | 450,645,000 |
| Paid related to: | ||||
| Current year | 130,459,000 | 74,502,000 | 501,339 | 376,677,000 |
| Prior years | 70,367,000 | 59,359,000 | 63,039 | 37,742,000 |
| Total paid | 200,826,000 | 133,861,000 | 564,378,000 | 414,419,000 |
| End of period balance - gross and net | $ 117,582,000 | $ 90,353,000 | 103,976,000 | 77,886,000 |
| Gross balance, end of year | $ 103,976,000 | $ 77,886,000 | ||