SHARE-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Transactions Involving Stock Units and Director Stock Grants

Transactions involving our stock units and director stock grants during the nine months ended September 30, 2017 and 2016 are summarized below:

	Nine Months Ended September 30, 2017				Nine Months Ended September 30, 2016
	(unaudited)				(unaudited)
	No. of Stock Units		Weighted Average Fair Value		No. of Stock Units		Weighted Average Fair Value
	(in thousands)				(in thousands)
Stock and stock units, beginning of period	535		$	35.11	371		$	36.26
Changes during the period:
Granted	109		$	15.99	86		$	26.19
Assumed - Furmanite acquisition	—		$	—	40		$	25.63
Vested and settled	(52	)	$	25.28	(38	)	$	27.61
Cancelled	(21	)	$	33.10	(13	)	$	30.92
Stock and stock units, end of period	571		$	32.41	446		$	34.27

Summary of Transactions Involving Performance Awards

Transactions involving our performance awards during the nine months ended September 30, 2017 and 2016 are summarized below:

	Nine Months Ended September 30, 2017			Nine Months Ended September 30, 2016
	(unaudited)			(unaudited)
	No. of Stock Units	Weighted Average Fair Value		No. of Stock Units	Weighted Average Fair Value
	(in thousands)			(in thousands)
Long-term performance stock units, beginning of period	59	$	37.16	59	$	37.16
Changes during the period:
Granted	181	$	19.68	—	$	—
Vested and settled	—	$	—	—	$	—
Cancelled	—	$	—	—	$	—
Long-term performance stock units, end of period	240	$	23.95	59	$	37.16

Summary of Transactions Involving Stock Options

Transactions involving our stock options during the nine months ended September 30, 2017 and 2016 are summarized below:

	Nine Months Ended September 30, 2017				Nine Months Ended September 30, 2016
	(unaudited)				(unaudited)
	No. of Options		Weighted Average Exercise Price		No. of Options		Weighted Average Exercise Price
	(in thousands)				(in thousands)
Shares under option, beginning of period	203		$	30.63	376		$	25.71
Changes during the period:
Granted	—		$	—	—		$	—
Assumed - Furmanite acquisition	—		$	—	132		$	33.20
Exercised	(16	)	$	27.91	(136	)	$	17.71
Cancelled	—		$	—	(4	)	$	44.62
Expired	(20	)	$	28.66	(45	)	$	35.51
Shares under option, end of period	167		$	31.12	323		$	30.52
Exercisable at end of period	167		$	31.12	319		$	30.40

Total Options Outstanding, Range of Exercise Prices and Remaining Contractual Lives

Options exercisable at September 30, 2017 had a weighted-average remaining contractual life of 2.2 years. For total options outstanding at September 30, 2017, the range of exercise prices and remaining contractual lives are as follows:

Range of Prices	No. of Options	Weighted Average Exercise Price		Weighted Average Remaining Life
	(in thousands)			(in years)
$20.18 to $30.28	14	$	21.68	3.5
$30.29 to $40.38	146	$	31.06	1.8
$40.39 to $50.47	7	$	50.47	6.6
Total	167	$	31.12	2.2