Income Taxes (Schedule of Components of Continuing Operations Before Income Tax, Income Tax Expense, Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Loss from continuing operations before income tax	$ (24,070)	$ (143,068)	$ (120,363)	$ (671,559)
Income tax expense	$ 17,361	$ 3,003	$ 31,732	$ 24,729
Effective tax rate	(72.10%)	(2.10%)	(26.40%)	(3.70%)