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Total Revenues from Client Services (Detail) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 272,681,000 | $ 218,929,000 | $ 800,396,000 | $ 638,826,000
Housekeeping Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 124,049,000 | 110,620,000 | 367,599,000 | 323,082,000
Laundry And Linen Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 60,846,000 | 52,991,000 | 179,621,000 | 154,431,000
Dietary Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 86,528,000 | 54,784,000 | 249,735,000 | 159,556,000
Maintenance Services And Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 1,258,000 | $ 534,000 | $ 3,441,000 | $ 1,757,000

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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=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
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