Unpaid Claims - Additional information (Details) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Mar. 31, 2021
USD ($)
|
Mar. 31, 2020
USD ($)
|
Dec. 31, 2020
USD ($)
|
Dec. 31, 2019
USD ($)
|
|
| Roll Forward In Liability For Unpaid Claims And Claims Adjustment Expense [Abstract] | ||||
| Unpaid Claims | $ 117,582,000 | $ 90,353,000 | $ 103,976,000 | $ 77,886,000 |
| Prior years | 70,367,000 | $ 59,359,000 | $ 63,039 | $ 37,742,000 |
| Unfavorable development recognized | $ 1,300,000 | |||
| Ratio of current year medical claims paid as a percent of current year net medical claims | 6,120 | 5,090 | 83.0 | 83.1 |