Investments - Equity Securities (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2023 |
Dec. 31, 2022 |
|
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Cost | $ 70,257 | $ 146,256 |
| Gross Unrealized Losses | (2,504) | (11,420) |
| Fair Value | 67,753 | 134,836 |
| Fixed income mutual funds | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Cost | 70,257 | 70,257 |
| Gross Unrealized Losses | (2,504) | (2,620) |
| Fair Value | $ 67,753 | 67,637 |
| Exchange traded mutual funds | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Cost | 75,999 | |
| Gross Unrealized Losses | (8,800) | |
| Fair Value | $ 67,199 |