Schedule V-Valuation and Qualifying Accounts (Details) - Allowance for Uncollectible Reinsurance - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation allowances and qualifying accounts
Balance at beginning of period	$ 24,539	$ 25,066	$ 25,911
Amounts charged to expense	2,863	(522)	(647)
Amounts recovered (written off)	(159)	(5)	(198)
Balance at end of period	$ 27,243	$ 24,539	$ 25,066