Income Taxes (Details 5) - Tax Valuation Allowance - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in Valuation and Qualifying Accounts
Balance at Beginning of Period	$ 196,972	$ 173,878	$ 50,911
Charged (Credited) to Operations	(22,019)	23,094	0
Charged to Other Account	3	0	9,238
Valuation Allowance Release	(628)	0	0
Valuation Allowance Set Up	0	0	113,729
Balance at End of Period	$ 174,328	$ 196,972	$ 173,878