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Purchase of Additional Ownership Interest in Joint Ventures - Additional Information (Detail) $ in Thousands			3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 13, 2017 USD ($)	Nov. 29, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) Location	Jul. 31, 2011
Business Acquisition [Line Items]
Revenues			$ 1,229,591	$ 1,241,232	$ 3,377,610	$ 3,307,091
Carrier Enterprise II
Business Acquisition [Line Items]
Additional ownership interest acquired	10.00%	10.00%
Revenues							$ 500,000
Cash consideration	$ 42,688	$ 42,909
Controlling interest, ownership percentage	80.00%							60.00%
Carrier Enterprise II | Northeast U.S.
Business Acquisition [Line Items]
Number of locations | Location							41
Carrier Enterprise II | MEXICO
Business Acquisition [Line Items]
Number of locations | Location							12

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Additional Ownership Interest Percentage Acquired

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Number of Locations

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