Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (171,686)	$ (155,659)
Net Carrying Amount	170,407
Gross carrying amount	387,293	388,019
Total acquired intangible assets	215,607	232,360
Trade names
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Trade names (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 18 days
Gross Carrying Amount	$ 308,393	308,419
Accumulated Amortization	(142,998)	(127,481)
Net Carrying Amount	$ 165,395	180,938
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	(28,688)	(27,478)
Net Carrying Amount	$ 5,012	$ 6,222