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v2.4.0.8

Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Revenue | $ 288,907 | $ 265,855 | $ 842,520 | $ 771,940
United States [Member] |  |  |  |
Revenue | 237,259 | 218,313 | 694,670 | 626,019
Canada [Member] |  |  |  |
Revenue | 34,129 | 34,753 | 100,612 | 109,475
Other Geographical Location [Member] |  |  |  |
Revenue | $ 17,519 | $ 12,789 | $ 47,238 | $ 36,446

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- 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration