XML 15 R46.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Revenue | $ 267,817 | $ 235,706 | $ 777,269 | $ 686,335
United States [Member] |  |  |  |
Revenue | 220,275 | 189,657 | 631,348 | 549,297
Canada [Member] |  |  |  |
Revenue | 34,753 | 39,207 | 109,475 | 113,676
Other Geographical Location [Member] |  |  |  |
Revenue | $ 12,789 | $ 6,842 | $ 36,446 | $ 23,362

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=6880815&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
Name: | us-gaap_SalesRevenueServicesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration