INCOME TAXES - Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	May 31, 2015	May 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 477	$ 539	$ 715	$ 697
Acquisition of Furmanite uncertain tax positions	0	660	0	0
Additions based on current year tax positions	0	464	0	0
Additions based on tax positions related to prior years	62	96	68	110
Reductions based on tax positions related to prior years	0	(564)	(306)	0
Settlements	0	(337)	0	0
Reductions resulting from a lapse of the applicable statute of limitations	0	0	0	(92)
Balance at end of year	$ 539	$ 858	$ 477	$ 715