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Revenue - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | $ 462,101,000 | $ 501,587,000 | $ 938,212,000 | $ 1,002,149,000 |
Renewal term |  |  | 1 year |  |
Contract liabilities | 0 |  | $ 0 |  | $ 0
Description of timing |  |  | The significant majority of the Company’s contracts with customers have an initial term of one year or less, with renewable one year service terms, cancellable by either party upon 30 to 90 days' notice after an initial period of 60 to 120 days.At June 30, 2019, the Company had $818.6 million related to performance obligations that were unsatisfied or partially unsatisfied for which the Company expects to recognize revenue. The Company expects to recognize revenue on approximately 21.4% of the remaining performance obligations over the next 12 months, with the remaining to be recognized thereafter. These amounts exclude variable consideration primarily related to performance obligations that consists of a series of distinct service periods with revenues based on future performance that cannot be estimated at contract inception. The Company also has elected to apply the practical expedient that permits exclusion of information about the remaining performance obligations with original expected durations of one year or less. |  |
Minimum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Cancellation notice period |  |  | 30 days |  |
Initial period preceding cancellation notice |  |  | 60 days |  |
Maximum |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Cancellation notice period |  |  | 90 days |  |
Initial period preceding cancellation notice |  |  | 120 days |  |
Housekeeping |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | 228,911,000 | 243,402,000 | $ 462,045,000 | $ 488,563,000 |
Percent of revenue |  |  | 49.20% | 48.80% |
Dietary |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | $ 233,190,000 | $ 258,185,000 | $ 476,167,000 | $ 513,586,000 |
Percent of revenue |  |  | 50.80% | 51.20% |

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044 + Details
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