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Segment Information (Schedule Of Information Of Reportable Segments) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) segment | Jun. 30, 2014 USD ($)
Segment Reporting [Abstract] |  |  |  |  |
Number of reportable segments | segment |  |  |  | 2 |
Percentage of revenue and income earned in one geographic area |  |  |  | 99.00% |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues |  | $ 355,356 | $ 319,295 | $ 710,602 | $ 631,460
Income (loss) before income taxes |  | 26,257 | 22,043 | 51,311 | 45,172
Operating Segments | Housekeeping Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues |  | 226,965 | 211,357 | 453,546 | 416,098
Income (loss) before income taxes |  | 21,752 | 17,883 | 42,369 | 36,635
Operating Segments | Dietary Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues |  | 128,391 | 107,938 | 257,056 | 215,362
Income (loss) before income taxes |  | 7,864 | 6,518 | 16,769 | 13,298
Corporate And Eliminations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 0
Income (loss) before income taxes | [1] | $ (3,359) | $ (2,358) | $ (7,827) | $ (4,761)
[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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