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Accounts receivable (Tables)

12 Months Ended

Dec. 31, 2017

Accounts receivable [Abstract]

Accounts receivable

Accounts receivable consist of the following:

	December 31,
(in thousands)	2017				2016
Billed		$	118,918			$	90,439
Unbilled			24,735				48,039
Total		$	143,653			$	138,478

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- References

No definition available.

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- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3,4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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