INCOME TAXES - Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,159	$ 858	$ 539
Acquisition of Furmanite uncertain tax positions	0	0	660
Additions based on current year tax positions	0	0	464
Additions based on tax positions related to prior years	1,478	301	96
Reductions based on tax positions related to prior years	(416)	0	(564)
Settlements	0	0	(337)
Balance at end of year	$ 2,221	$ 1,159	$ 858