Schedule II - Condensed Financial Information of the Registrant (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Investments in consolidated affiliates	$ 37,278	$ 23,481
Other	23,798	19,522
Total assets	2,022,669	1,856,240
Liabilities
Total liabilities	1,214,263	1,137,596
Shareholders' equity	808,406	718,644	$ 701,016	$ 670,726
Total liabilities and shareholders' equity	2,022,669	1,856,240
Registrant
Assets
Investments in consolidated affiliates	810,251	720,721
Other	54	69
Total assets	810,305	720,790
Liabilities
Accounts payable and other liabilities	1,899	2,146
Total liabilities	1,899	2,146
Shareholders' equity	808,406	718,644
Total liabilities and shareholders' equity	$ 810,305	$ 720,790