Schedule II Valuation and Qualifying Accounts Schedule II - Valuation Allowance of Deferred Tax Assets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning	$ 50,853	$ 15,084	$ 12,857
Valuation Allowances and Reserves, Charged to Cost and Expense	2,824	36,658	0
Valuation Allowances and Reserves, Charged to Other Accounts	3,009	0	3,023
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	4,298	889	796
Valuation Allowances and Reserves, Balance, Ending	$ 52,388	$ 50,853	$ 15,084