REVENUE (Tables)

6 Months Ended

Jun. 30, 2020

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):

	Three Months Ended June 30, 2020						Three Months Ended June 30, 2019
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	78,234	$	2,240	$	80,474	$	134,068	$	4,590	$	138,658
MS	67,403		25,417		92,820		107,176		37,721		144,897
Quest Integrity	10,748		5,262		16,010		24,649		7,625		32,274
Total	$	156,385	$	32,919	$	189,304	$	265,893	$	49,936	$	315,829

	Six Months Ended June 30, 2020						Six Months Ended June 30, 2019
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	183,536	$	4,819	$	188,355	$	257,688	$	8,026	$	265,714
MS	143,985		53,354		197,339		194,628		71,795		266,423
Quest Integrity	23,582		16,867		40,449		39,006		14,285		53,291
Total	$	351,103	$	75,040	$	426,143	$	491,322	$	94,106	$	585,428

	Three Months Ended June 30, 2020
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	62,963	$	62	$	10,770	$	6,679	$	80,474
MS	—		92,094		196		530		92,820
Quest Integrity	16,010		—		—		—		16,010
Total	$	78,973	$	92,156	$	10,966	$	7,209	$	189,304

	Three Months Ended June 30, 2019
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	107,991	$	136	$	17,511	$	13,020	$	138,658
MS	—		142,908		920		1,069		144,897
Quest Integrity	32,274		—		—		—		32,274
Total	$	140,265	$	143,044	$	18,431	$	14,089	$	315,829

	Six Months Ended June 30, 2020
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	149,370	$	163	$	24,916	$	13,906	$	188,355
MS	—		194,709		675		1,955		197,339
Quest Integrity	40,449		—		—		—		40,449
Total	$	189,819	$	194,872	$	25,591	$	15,861	$	426,143

	Six Months Ended June 30, 2019
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	210,927	$	498	$	36,304	$	17,985	$	265,714
MS	—		262,397		1,659		2,367		266,423
Quest Integrity	53,291		—		—		—		53,291
Total	$	264,218	$	262,895	$	37,963	$	20,352	$	585,428

Contract with Customer, Asset and Liability

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

	June 30, 2020		December 31, 2019
	(unaudited)
Trade accounts receivable, net1	$	195,522	$	245,617
Contract assets2	$	5,876	$	4,671
Contract liabilities3	$	1,232	$	1,224

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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.