Unaudited Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Noncontrolling Interest	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at beginning of period (in shares) at Dec. 31, 2014		20,700,000
Treasury Stock, Balance at beginning of period (in shares) at Dec. 31, 2014			0
Balance, beginning of period at Dec. 31, 2014	$ 339,107	$ 6,211	$ 0	$ 109,700	$ 5,855	$ 225,747	$ (8,406)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,434					17,434
Foreign currency translation adjustment, net of tax	(5,863)						(5,863)
Foreign currency hedge, net of tax	823						823
Non-cash compensation	2,424			2,424
Comprehensive income attributable to noncontrolling interest	179				179	(213)	34
Vesting of stock awards (in shares)		3,000
Vesting of stock awards	(41)			(41)
Tax benefit of exercise of stock options	$ 1,535			1,535
Exercise of stock options (in shares)	201,000	201,000
Exercise of stock options	$ 2,550	$ 61		2,489
Purchase of treasury stock (in shares)			(547,000)
Purchase of treasury stock	(21,138)		$ (21,138)
Balance at end of period (in shares) at Jun. 30, 2015		20,904,000
Treasury Stock, Balance at end of period (in shares) at Jun. 30, 2015			(547,000)
Balance, end of period at Jun. 30, 2015	$ 336,831	$ 6,272	$ (21,138)	116,107	6,034	242,968	(13,412)
Balance at beginning of period (in shares) at Dec. 31, 2015		21,837,000
Treasury Stock, Balance at beginning of period (in shares) at Dec. 31, 2015	(546,977)		(547,000)
Balance, beginning of period at Dec. 31, 2015	$ 338,146	$ 6,552	$ (21,138)	120,126	0	250,980	(18,374)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	922					922
Foreign currency translation adjustment, net of tax	1,636						1,636
Foreign currency hedge, net of tax	(147)						(147)
Non-cash compensation	4,704			4,704
Comprehensive income attributable to noncontrolling interest	0
Vesting of stock awards (in shares)		28,000
Vesting of stock awards	(154)	$ 8		(162)
Tax benefit of exercise of stock options	86			86
Issuance of common stock in Furmanite acquisition and conversion of Furmanite share-based awards (in shares)		8,208,000
Issuance of common stock in Furmanite acquisition and conversion of Furmanite share-based awards	$ 211,530	$ 2,462		209,068
Exercise of stock options (in shares)	69,000	75,000
Exercise of stock options	$ 1,064	$ 22		1,042
Purchase of treasury stock (in shares)	(274,110)		(274,000)
Purchase of treasury stock	$ (7,593)		$ (7,593)
Other	$ (51)			(51)
Balance at end of period (in shares) at Jun. 30, 2016		30,148,000
Treasury Stock, Balance at end of period (in shares) at Jun. 30, 2016	(821,087)		(821,000)
Balance, end of period at Jun. 30, 2016	$ 550,143	$ 9,044	$ (28,731)	$ 334,813	$ 0	$ 251,902	$ (16,885)