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Investments - Schedule of Fair Value of Financial Instruments Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule of Available-for-sale Securities |  |
Investment Owned, at Fair Value | $ 922,765 | $ 985,458
U.S. Government and Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 102,216 | 130,425
Foreign Government |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 4,985 | 1,516
States, Municipalities and Political Subdivisions |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 105,093 | 134,382
Public Utilities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 31,066 | 29,980
Corporate Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 299,044 | 292,329
Mortgage-backed securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 257,713 | 288,212
Asset-backed Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 80,163 | 56,657
Redeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 4,660 | 6,510
Fixed Maturities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 884,940 | 940,011
Common Stock |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 0 |
Nonredeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 6,569 | 7,293
Equity Securities |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 29,407 | 7,445
Other Long-term Investments |  |
Schedule of Available-for-sale Securities |  |
Other Investments | 8,418 | 38,002
Mutual Fund |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 22,838 | 152
Level 1 |  |
Schedule of Available-for-sale Securities |  |
Investment Owned, at Fair Value | 24,876 | 9,299
Level 1 | U.S. Government and Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 1 | Foreign Government |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 1 | States, Municipalities and Political Subdivisions |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 1 | Public Utilities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 1 | Corporate Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 1 | Mortgage-backed securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 1 | Asset-backed Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 1 | Redeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 814 | 1,554
Level 1 | Fixed Maturities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 814 | 1,554
Level 1 | Common Stock |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 0 |
Level 1 | Nonredeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 6,569 | 7,293
Level 1 | Equity Securities |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 23,762 | 7,445
Level 1 | Other Long-term Investments |  |
Schedule of Available-for-sale Securities |  |
Other Investments | 300 | 300
Level 1 | Mutual Fund |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 17,193 | 152
Level 2 |  |
Schedule of Available-for-sale Securities |  |
Investment Owned, at Fair Value | 897,889 | 976,159
Level 2 | U.S. Government and Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 102,216 | 130,425
Level 2 | Foreign Government |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 4,985 | 1,516
Level 2 | States, Municipalities and Political Subdivisions |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 105,093 | 134,382
Level 2 | Public Utilities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 31,066 | 29,980
Level 2 | Corporate Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 299,044 | 292,329
Level 2 | Mortgage-backed securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 257,713 | 288,212
Level 2 | Asset-backed Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 80,163 | 56,657
Level 2 | Redeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 3,846 | 4,956
Level 2 | Fixed Maturities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 884,126 | 938,457
Level 2 | Common Stock |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 0 |
Level 2 | Nonredeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 0 | 0
Level 2 | Equity Securities |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 5,645 | 0
Level 2 | Other Long-term Investments |  |
Schedule of Available-for-sale Securities |  |
Other Investments | 8,118 | 37,702
Level 2 | Mutual Fund |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 5,645 | 0
Level 3 |  |
Schedule of Available-for-sale Securities |  |
Investment Owned, at Fair Value | 0 | 0
Level 3 | U.S. Government and Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Foreign Government |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | States, Municipalities and Political Subdivisions |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Public Utilities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Corporate Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Mortgage-backed securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Asset-backed Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Redeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Fixed Maturities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities | 0 | 0
Level 3 | Common Stock |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 0 |
Level 3 | Nonredeemable Preferred Stocks |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 0 | 0
Level 3 | Equity Securities |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | 0 | 0
Level 3 | Other Long-term Investments |  |
Schedule of Available-for-sale Securities |  |
Other Investments | 0 | 0
Level 3 | Mutual Fund |  |
Schedule of Available-for-sale Securities |  |
Equity securities, fair value | $ 0 | $ 0

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