SHARE-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31, 2017 and 2016 are summarized below:

	Three Months Ended March 31, 2017				Three Months Ended March 31, 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	2		$	33.27	70		$	25.30
Assumed - Furmanite acquisition	—		$	—	40		$	25.63
Vested and settled	(21	)	$	25.33	—		$	—
Cancelled	(3	)	$	31.58	(3	)	$	28.09
Stock and stock units, end of period	513		$	35.55	478		$	33.83

Summary of Transactions Involving Performance Awards

Transactions involving our performance awards during the three months ended March 31, 2017 and 2016 are summarized below:

	Three Months Ended March 31, 2017			Three Months Ended March 31, 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	167	$	20.24	—	$	—
Vested and settled	—	$	—	—	$	—
Cancelled	—	$	—	—	$	—
Long-term performance stock units, end of period	226	$	24.64	59	$	37.16

Summary of Transactions Involving Stock Options

Transactions involving our stock options during the three months ended March 31, 2017 and 2016 are summarized below:

	Three Months Ended March 31, 2017				Three Months Ended March 31, 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	(64	)	$	15.67
Cancelled	—		$	—	(2	)	$	50.10
Expired	(1	)	$	32.05	(5	)	$	30.33
Shares under option, end of period	186		$	30.87	437		$	29.26
Exercisable at end of period	185		$	30.71	419		$	28.92

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

Options exercisable at March 31, 2017 had a weighted-average remaining contractual life of 2.6 years. For total options outstanding at March 31, 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	29	$	24.81	2.2
$30.29 to $40.38	150	$	31.08	2.5
$40.39 to $50.47	7	$	50.47	7.1
Total	186	$	30.87	2.6