REVENUE (Tables)

9 Months Ended

Sep. 30, 2019

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 September 30, 2019						Three Months Ended September 30, 2018
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	121,772	$	4,607	$	126,379	$	143,508	$	4,021	$	147,529
MS	101,929		33,696		135,625		80,714		38,297		119,011
Quest Integrity	18,370		9,705		28,075		15,958		8,358		24,316
Total	$	242,071	$	48,008	$	290,079	$	240,180	$	50,676	$	290,856

	Nine Months Ended September 30, 2019						Nine Months Ended September 30, 2018
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	379,460	$	12,633	$	392,093	$	456,701	$	10,920	$	467,621
MS	296,557		105,491		402,048		292,502		108,388		400,890
Quest Integrity	57,376		23,990		81,366		45,658		22,961		68,619
Total	$	733,393	$	142,114	$	875,507	$	794,861	$	142,269	$	937,130

	Three Months Ended September 30, 2019
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	102,448	$	100	$	16,500	$	7,331	$	126,379
MS	—		134,096		382		1,147		135,625
Quest Integrity	28,075		—		—		—		28,075
Total	$	130,523	$	134,196	$	16,882	$	8,478	$	290,079

	Three Months Ended September 30, 2018
	(unaudited)
	Non-Destructive Evaluation and Testing Services1		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	119,088	$	3,194	$	17,019	$	8,228	$	147,529
MS	85		117,147		818		961		119,011
Quest Integrity	24,316		—		—		—		24,316
Total	$	143,489	$	120,341	$	17,837	$	9,189	$	290,856

_________________

1 This service type is inclusive of the “Asset Integrity Management” and “Non-Destructive Evaluation” service types as disclosed in the Form 10-Q for the third quarter of 2018.

	Nine Months Ended September 30, 2019
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	313,375	$	598	$	52,804	$	25,316	$	392,093
MS	—		396,493		2,041		3,514		402,048
Quest Integrity	81,366		—		—		—		81,366
Total	$	394,741	$	397,091	$	54,845	$	28,830	$	875,507

	Nine Months Ended September 30, 2018
	(unaudited)
	Non-Destructive Evaluation and Testing Services1		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	376,244	$	9,077	$	58,774	$	23,526	$	467,621
MS	240		394,521		1,761		4,368		400,890
Quest Integrity	68,619		—		—		—		68,619
Total	$	445,103	$	403,598	$	60,535	$	27,894	$	937,130

_________________

1 This service type is inclusive of the “Asset Integrity Management” and “Non-Destructive Evaluation” service types as disclosed in the Form 10-Q for the third quarter of 2018.

Contract with Customer, Asset and Liability

The following table provides information about trade accounts receivable, contract assets and contract liabilities as of September 30, 2019 and December 31, 2018 (in thousands):

	September 30, 2019		December 31, 2018
	(unaudited)
Trade accounts receivable, net1	$	263,505	$	268,352
Contract assets2	$	6,224	$	5,745
Contract liabilities3	$	1,181	$	1,784

_________________

1    Includes billed and unbilled amounts, net of allowance for doubtful accounts. 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.