REVENUE (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Disaggregation of revenue. Essentially all of our revenues are associated with contracts with customers. 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, 2018
	(unaudited)
	United States and Canada		Other Countries		Total
Revenue:
IHT	$	148,210	$	3,209	$	151,419
MS	99,824		33,077		132,901
Quest Integrity	12,710		5,355		18,065
Total	$	260,744	$	41,641	$	302,385

	Three Months Ended March 31, 2018
	(unaudited)
	Asset Integrity Management		Repair and Maintenance Services		Heat Treating		Non-Destructive Evaluation		Other		Total
Revenue:
IHT	$	9,156	$	846	$	19,296	$	114,380	$	7,741	$	151,419
MS	—		131,199		504		—		1,198		132,901
Quest Integrity	18,065		—		—		—		—		18,065
Total	$	27,221	$	132,045	$	19,800	$	114,380	$	8,939	$	302,385

Contract with Customer, Asset and Liability

The following table provides information about trade accounts receivable, contract assets and contract liabilities as of March 31, 2018 and January 1, 2018, the date of adoption of ASC 606, (in thousands):

	March 31, 2018		January 1, 2018
	(unaudited)		(unaudited)
Trade accounts receivable, net1	$	288,980	$	301,963
Contract assets2	$	14,792	$	9,823
Contract liabilities3	$	3,799	$	5,415

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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 sheet.

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