Interest Expense Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018		Mar. 31, 2017
Banking and Thrift [Abstract]
Interest Expense, Borrowings	$ 6,048		$ 390
Amortization of Debt Discount (Premium)	165	[1]	0
Amortization of Debt Issuance Costs	631		188
Interest Paid, Capitalized	(2,243)		(40)
Interest Expense	$ 4,601		$ 538

[1] Includes accretion of original issue discount attributable to the Second Lien Facility (see Note 8).