Income Taxes (Current) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$ 52,100		$ 52,100
Current Income Tax Expense (Benefit)			(45,736)	$ 3,047
Deferred Income Tax Expense (Benefit)			67,041	(2,975)
Income tax expense (benefit)	$ 20,316	$ (339)	$ 21,305	$ 72