Reinsurance - Allowance for Credit Loss on Reinsurance Recoverable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reinsurance Disclosures [Abstract]
Balance, beginning of period	$ 2,942	$ 7,144
Current period provision for expected credit losses	141	219
Balance, at the end of period	$ 3,083	$ 7,363