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Revenue - Schedule of U.K. Revenue Attributed to Each Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 833,304	$ 777,251	$ 2,366,425	$ 2,327,230
U.K. Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	285,343	267,868	817,772	820,074
U.K. Facilities [Member] | Health Care Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	157,277	148,138	442,952	455,399
U.K. Facilities [Member] | Education and Children's Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	47,190	43,388	138,486	135,652
U.K. Facilities [Member] | Adult Care Facilities [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 80,876	$ 76,342	$ 236,334	$ 229,023

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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