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Revenues, Contract Assets and Contract Liabilities - Schedule of Geographical Information of Revenue from External Customer (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total Revenues	$ 107,168	$ 87,160
Colombia [Member]
Total Revenues	12,959	21,824
United States [Member]
Total Revenues	92,062	62,993
Panama [Member]
Total Revenues	763	814
Other [Member]
Total Revenues	$ 1,384	$ 1,529

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

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Period Type:	duration

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- Details

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X

- Details

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X

- Details

Name:	srt_StatementGeographicalAxis=country_PA
Namespace Prefix:
Data Type:	na
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X

- Details

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