Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Provision for Income Taxes [Line Items]
Current Federal Tax Expense (Benefit)	$ 0	$ 0	$ 0	$ 0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	59,608	(39,832)	(61,204)	271,014
Current Income Tax Expense (Benefit)	4,309	6,588	35,406	10,775
Deferred Foreign Income Tax Expense (Benefit)	(1,370)	(4,377)	(2,154)	(3,964)
Deferred Income Tax Expense (Benefit)	(1,370)	(4,377)	(2,154)	(3,964)
Income Tax Expense (Benefit)	2,939	2,211	33,252	6,811
Income (Loss) from Continuing Operations before Income Taxes, Foreign	9,447	19,884	(11,058)	23,655
Pre-tax income (loss)	69,055	(19,948)	(72,262)	294,669
Current State and Local Tax Expense (Benefit)	358	424	(2,884)	2,106
Current Foreign Tax Expense (Benefit)	$ 3,951	$ 6,164	$ 38,290	$ 8,669