Condensed Consolidated Statements of Stockholders' Equity - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid In Capital	Retained Deficit	Accumulated Other Comp. Loss
Beginning balance (in shares) at Dec. 31, 2017	30,219,278	30,219,000
Beginning balance at Dec. 31, 2017	$ 74,742	$ 304	$ (9,114)	$ 239,870	$ (115,083)	$ (41,235)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	1,517			1,517
Total comprehensive income	$ 18,282				23,048	(4,766)
Ending balance (in shares) at Jun. 30, 2018	30,219,278	30,219,000
Ending balance at Jun. 30, 2018	$ 94,541	$ 304	$ (9,114)	$ 241,387	$ (92,035)	$ (46,001)