GOODWILL AND IMPAIRMENT CHARGES (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill

A summary of goodwill is as follows (in thousands):

	IHT						MS						Quest Integrity						Consolidated
	Goodwill, Gross		Accumulated Impairment		Goodwill, Net		Goodwill, Gross		Accumulated Impairment		Goodwill, Net		Goodwill, Gross		Accumulated Impairment		Goodwill, Net		Goodwill, Gross		Accumulated Impairment		Goodwill, Net
Balance at December 31, 2018	$	213,748	$	(21,140)	$	192,608	$	109,728	$	(54,101)	$	55,627	$	33,415	$	—	$	33,415	$	356,891	$	(75,241)	$	281,650
FX Adjustments	608		—		608		(218)		—		(218)		(34)		—		(34)		356		—		356
Balance at December 31, 2019	$	214,356	$	(21,140)	$	193,216	$	109,510	$	(54,101)	$	55,409	$	33,381	$	—	$	33,381	$	357,247	$	(75,241)	$	282,006
FX Adjustments	(1,428)		—		(1,428)		1,211		—		1,211		854		—		854		637		—		637
Impairment charge	—		(191,788)		(191,788)		—		—		—		—		—		—		—		(191,788)		(191,788)
Additions	—		—		—		—		—		—		496		—		496		496		—		496
Balance at December 31, 2020	$	212,928	$	(212,928)	$	—	$	110,721	$	(54,101)	$	56,620	$	34,731	$	—	$	34,731	$	358,380	$	(267,029)	$	91,351