Schedule II - Condensed Financial Information of the Registrant (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Investments in consolidated affiliates	$ 87,911	$ 45,239
Other	27,108	25,595
Total assets	2,117,391	2,054,273
Liabilities
Total liabilities	1,190,218	1,169,594
Shareholders' equity	927,173	884,679	$ 808,406	$ 718,644
Total liabilities and shareholders' equity	2,117,391	2,054,273
Registrant
Assets
Investments in consolidated affiliates	929,136	886,662
Other	24	39
Total assets	929,160	886,701
Liabilities
Accounts payable and other liabilities	1,987	2,022
Total liabilities	1,987	2,022
Shareholders' equity	927,173	884,679
Total liabilities and shareholders' equity	$ 929,160	$ 886,701