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%