Schedule II Valuation and Qualifying Accounts Schedule II (Details) - Valuation Allowance of Deferred Tax Assets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning	$ 15,084	$ 12,857	$ 10,730
Valuation Allowances and Reserves, Charged to Cost and Expense	36,658	0	9,513
Valuation Allowances and Reserves, Charged to Other Accounts	0	3,023	72,170
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	889	796	79,556
Valuation Allowances and Reserves, Balance, Ending	$ 50,853	$ 15,084	$ 12,857