Income Taxes Details (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate, foreign income tax rate, percent									0.00%
Unrecognized Tax Benefits, Excluding Bond Premium Amortization, Decrease Resulting from Prior Period Tax Position										$ 50,800
Income Tax Expense (Benefit)	$ (23)	$ 86	$ 1,242	$ 5,810	$ (596)	$ 12,671	$ (1,553)	$ 2,542	$ 7,115	$ 13,064	$ 35,141
Effective Income Tax Rate Reconciliation, Percent									126.00%	652.60%	(1176.80%)