Schedule V - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Premiums and fees receivable
Movement in Valuation Allowances and Reserves [Roll Forward]
Opening Balance	$ 39,926	$ 26,569	$ 22,524
Additions - Charged to Expense	6,985	20,720	10,006
Deductions - Amounts Written Off	(7,817)	(7,363)	(5,961)
Ending Balance	39,093	39,926	26,569
Due from reinsurers
Movement in Valuation Allowances and Reserves [Roll Forward]
Opening Balance	1,010	1,049	1,020
Additions - Charged to Expense	65	(29)	20
Deductions - Amounts Written Off	(128)	(10)	9
Ending Balance	947	1,010	1,049
Deferred federal and foreign income taxes
Movement in Valuation Allowances and Reserves [Roll Forward]
Opening Balance	16,619	5,457	4,037
Additions - Charged to Expense	18,772	12,663	1,420
Deductions - Amounts Written Off	(196)	(1,501)	0
Ending Balance	35,195	16,619	5,457
Loan loss reserves
Movement in Valuation Allowances and Reserves [Roll Forward]
Opening Balance	3,383	3,397	2,094
Additions - Charged to Expense	0	(14)	1,303
Deductions - Amounts Written Off	0	0	0
Ending Balance	3,383	3,383	3,397
General Valuation Allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Opening Balance	60,938	36,472	29,675
Additions - Charged to Expense	25,822	33,340	12,749
Deductions - Amounts Written Off	(8,141)	(8,874)	(5,952)
Ending Balance	$ 78,618	$ 60,938	$ 36,472