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Segment Information (Schedule Of Information Of Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 segment | Jun. 30, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  | 2 |  |  |
Percentage of revenue and income earned in one geographic segment |  |  |  |  | 99.00% |  |  |
Revenues | $ 273,604 |  | $ 267,108 |  | $ 547,508 |  | $ 527,715 |
Income before income taxes | 19,858 |  | 18,283 |  | 38,815 |  | 32,066 |
Housekeeping Services [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 183,754 |  | 183,215 |  | 371,384 |  | 364,397 |
Income before income taxes | 17,632 |  | 17,671 |  | 36,438 |  | 35,127 |
Dietary Services [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 89,850 |  | 83,891 |  | 176,124 |  | 163,281 |
Income before income taxes | 5,341 |  | 4,620 |  | 10,465 |  | 8,674 |
Corporate And Eliminations [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Revenues | 0 | [1] | 2 | [1] | 0 | [1] | 37 | [1]
Income before income taxes | $ (3,115) | [1] | $ (4,008) | [1] | $ (8,088) | [1] | $ (11,735) | [1]
[1] | Represents primarily corporate office cost and related overhead, recording of transactions at the reportable segment level which use methods other than U.S. GAAP, as well as consolidated subsidiaries’ operating expenses that are not allocated to the reportable segments, net of investment and interest income.

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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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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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