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Investments - Summarized Fair Value and Gross Unrealized Losses on Securities Available for Sale (Details) $ in Thousands | Jun. 30, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Number of issues | security | 323 | 404
Less than 12 months, Fair value | $ 410,454 | $ 682,402
Less than 12 months, Unrealized losses | $ (36,342) | $ (13,818)
12 months or longer, Number of issues | security | 174 | 33
12 months or longer, Fair value | $ 258,786 | $ 45,645
12 months or longer, Unrealized losses | $ (39,794) | $ (1,853)
Fixed Maturities | U.S. government obligations and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Number of issues | security | 3 | 4
Less than 12 months, Fair value | $ 11,554 | $ 18,913
Less than 12 months, Unrealized losses | $ (80) | $ (111)
12 months or longer, Number of issues | security | 5 | 4
12 months or longer, Fair value | $ 9,058 | $ 5,016
12 months or longer, Unrealized losses | $ (711) | $ (223)
Fixed Maturities | Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Number of issues | security | 175 | 249
Less than 12 months, Fair value | $ 230,149 | $ 378,595
Less than 12 months, Unrealized losses | $ (23,682) | $ (7,468)
12 months or longer, Number of issues | security | 95 | 18
12 months or longer, Fair value | $ 113,327 | $ 17,356
12 months or longer, Unrealized losses | $ (17,574) | $ (679)
Fixed Maturities | Mortgage-backed and asset-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Number of issues | security | 131 | 145
Less than 12 months, Fair value | $ 157,635 | $ 274,883
Less than 12 months, Unrealized losses | $ (11,032) | $ (5,969)
12 months or longer, Number of issues | security | 73 | 11
12 months or longer, Fair value | $ 133,065 | $ 23,273
12 months or longer, Unrealized losses | $ (20,840) | $ (951)
Fixed Maturities | Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Number of issues | security | 9 | 5
Less than 12 months, Fair value | $ 9,655 | $ 9,811
Less than 12 months, Unrealized losses | $ (1,265) | $ (269)
12 months or longer, Number of issues | security | 1 | 0
12 months or longer, Fair value | $ 3,336 | $ 0
12 months or longer, Unrealized losses | $ (669) | $ 0
Fixed Maturities | Redeemable preferred stock |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Number of issues | security | 5 | 1
Less than 12 months, Fair value | $ 1,461 | $ 200
Less than 12 months, Unrealized losses | $ (283) | $ (1)
12 months or longer, Number of issues | security | 0 | 0
12 months or longer, Fair value | $ 0 | $ 0
12 months or longer, Unrealized losses | $ 0 | $ 0

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