Condensed Consolidated Statements of Stockholders' Equity - 3 months ended Mar. 31, 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	673			673
Total comprehensive income	$ 10,985				9,853	1,132
Ending balance (in shares) at Mar. 31, 2018	30,219,278	30,219,000
Ending balance at Mar. 31, 2018	$ 86,400	$ 304	$ (9,114)	$ 240,543	$ (105,230)	$ (40,103)