Income Tax (Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current tax expense (benefit)	$ 6,726	$ 0	$ 0
Deferred tax expense (benefit)	(10,239)	0	0
Total income tax provision (benefit)	$ (3,513)	$ 0	$ 0