Income Taxes (Schedule of Components of Continuing Operations Before Income Tax, Income Tax Expense, Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Loss from continuing operations before income tax	$ (94,584)	$ (46,244)	$ (96,293)	$ (528,491)
Income tax expense	$ 3,468	$ 6,235	$ 14,371	$ 21,726
Effective tax rate	(3.70%)	(13.50%)	(14.90%)	(4.10%)