REVENUE (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

A disaggregation of our revenue from contracts with customers by geographic region, by reportable operating segment and by service type is presented below (in thousands):

Geographic area:

	Three Months Ended September 30, 2021						Three Months Ended September 30, 2020
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	98,812	$	2,664	$	101,476	$	94,414	$	2,223	$	96,637
MS	63,885		32,518		96,403		73,204		28,534		101,738
Quest Integrity	11,421		8,110		19,531		12,382		8,336		20,718
Total	$	174,118	$	43,292	$	217,410	$	180,000	$	39,093	$	219,093

	Nine Months Ended September 30, 2021						Nine Months Ended September 30, 2020
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	302,871	$	7,206	$	310,077	$	277,947	$	7,045	$	284,992
MS	189,234		91,732		280,966		217,189		81,888		299,077
Quest Integrity	36,956		22,902		59,858		35,967		25,200		61,167
Total	$	529,061	$	121,840	$	650,901	$	531,103	$	114,133	$	645,236

Operating segment and service type:

	Three Months Ended September 30, 2021
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	80,553	$	56	$	11,928	$	8,939	$	101,476
MS	—		95,560		71		772		96,403
Quest Integrity	19,531		—		—		—		19,531
Total	$	100,084	$	95,616	$	11,999	$	9,711	$	217,410

	Three Months Ended September 30, 2020
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	77,323	$	—	$	12,667	$	6,647	$	96,637
MS	—		101,032		221		485		101,738
Quest Integrity	20,718		—		—		—		20,718
Total	$	98,041	$	101,032	$	12,888	$	7,132	$	219,093

	Nine Months Ended September 30, 2021
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	244,374	$	344	$	42,650	$	22,709	$	310,077
MS	—		278,685		768		1,513		280,966
Quest Integrity	59,858		—		—		—		59,858
Total	$	304,232	$	279,029	$	43,418	$	24,222	$	650,901

	Nine Months Ended September 30, 2020
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	226,693	$	121	$	37,583	$	20,595	$	284,992
MS	—		295,741		896		2,440		299,077
Quest Integrity	61,167		—		—		—		61,167
Total	$	287,860	$	295,862	$	38,479	$	23,035	$	645,236

Contract with Customer, Asset and Liability

Trade accounts receivable, contract assets and contract liabilities consisted of the following (in thousands):

	September 30, 2021		December 31, 2020
	(unaudited)
Trade accounts receivable, net1	$	204,294	$	194,066
Contract assets2	$	1,475	$	5,242
Contract liabilities3	$	1,083	$	930

_________________

1    Includes billed and unbilled amounts, net of allowance for credit losses. See Note 3 for details.    

2    Included in the “Prepaid expenses and other current assets” line on the condensed consolidated balance sheets.

3    Included in the “Other accrued liabilities” line of the condensed consolidated balance sheets.