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Segment Information (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Revenue	$ 328,415	$ 309,391	$ 967,243	$ 883,601
Other Segments
Segment Reporting Information [Line Items]
Revenue	28,344	22,211	78,522	54,519
United States
Segment Reporting Information [Line Items]
Revenue	270,512	249,128	793,904	721,089
Canada
Segment Reporting Information [Line Items]
Revenue	$ 29,559	$ 38,052	$ 94,817	$ 107,993

X

- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ 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(d))



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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+ References

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