Schedule V - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reinsurance balances recoverable, provisions for bad debt
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 147,639	$ 156,732	$ 165,213	$ 174,516
Charged to costs and expenses	0	0	(1,536)
Charged to other accounts	111	(1,837)	(4,191)
Deductions	(9,204)	(6,644)	(3,576)
Balance at End of Year	147,639	156,732	165,213
Valuation allowance for deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	117,390	212,113	188,300	$ 290,861
Charged to costs and expenses	2,792	(2,492)	(16,694)
Charged to other accounts	0	18,000	0
Deductions	(97,515)	8,305	(85,867)
Balance at End of Year	$ 117,390	$ 212,113	$ 188,300