Equity - Private Placement (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Oct. 29, 2018	Dec. 31, 2018	Dec. 31, 2017
The Private Placement
Share price (in dollars per share)		$ 4.22	$ 1.85
Consideration in private placement		$ 143,651
Private placement
The Private Placement
Shares issued (in shares)	10,000,000
Share price (in dollars per share)	$ 8.00
Consideration in private placement	$ 80,000
Private Placement For Affiliates Entering In to Second Lien Term Facility
The Private Placement
Shares issued (in shares)	23,094,501
Consideration in private placement	$ 0