Income Taxes (Loss from Continuing Operations and Effective Tax Rate) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before income tax	$ 21,249	$ (1,709)
Income tax (benefit) expense	$ (136,332)	$ 10,903
Effective tax rate	(641.60%)	(638.00%)
Federal income tax expense (benefit), continuing operations	$ 137,300