Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (126,256)	$ (108,152)
Net Carrying Amount	216,590
Gross carrying amount	388,046	312,036
Total acquired intangible assets	261,790	203,884
Trade names
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Trade name (Indefinite lived)	$ 45,200	45,200
Facility management contracts
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	16 years 3 months 6 days
Gross Carrying Amount	$ 308,446	233,136
Accumulated Amortization	(101,537)	(87,256)
Net Carrying Amount	$ 206,909	145,880
Covenants not to compete
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year
Gross Carrying Amount	$ 700	0
Accumulated Amortization	(342)	0
Net Carrying Amount	$ 358	0
Technology
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	7 years 3 months 18 days
Gross Carrying Amount	$ 33,700	33,700
Accumulated Amortization	(24,377)	(20,896)
Net Carrying Amount	$ 9,323	$ 12,804