REVENUE (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2020						Three Months Ended March 31, 2019
	(unaudited)						(unaudited)
	United States and Canada		Other Countries		Total		United States and Canada		Other Countries		Total
Revenue:
IHT	$	105,304	$	2,577	$	107,881	$	123,620	$	3,436	$	127,056
MS	76,582		27,937		104,519		87,452		34,074		121,526
Quest Integrity	12,833		11,606		24,439		14,357		6,660		21,017
Total	$	194,719	$	42,120	$	236,839	$	225,429	$	44,170	$	269,599

	Three Months Ended March 31, 2020
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	86,407	$	101	$	14,146	$	7,227	$	107,881
MS	—		102,615		479		1,425		104,519
Quest Integrity	24,439		—		—		—		24,439
Total	$	110,846	$	102,716	$	14,625	$	8,652	$	236,839

	Three Months Ended March 31, 2019
	(unaudited)
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	102,936	$	362	$	18,793	$	4,965	$	127,056
MS	—		119,489		739		1,298		121,526
Quest Integrity	21,017		—		—		—		21,017
Total	$	123,953	$	119,851	$	19,532	$	6,263	$	269,599

Contract with Customer, Asset and Liability

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

	March 31, 2020		December 31, 2019
	(unaudited)
Trade accounts receivable, net1	$	224,111	$	245,617
Contract assets2	$	5,810	$	4,671
Contract liabilities3	$	1,076	$	1,224

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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.