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Schedule IV (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract] |  |  |
Direct Premiums Written | $ 1,329,129 | $ 1,411,558 | $ 1,278,504
Ceded Premiums Written | 864,725 | 755,871 | 633,275
Assumed Premiums Written | 316 | 45,305 | 101,764
Premiums Written, Net | $ 464,720 | $ 700,992 | $ 746,993
premiums assumed as percentage of net premiums | 0.10% | 6.50% | 13.60%

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