Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (82,735)	$ (68,516)
Net Carrying Amount	184,127
Gross carrying amount	312,062	223,791
Total acquired intangible assets	$ 229,327	155,275
Facility management contracts and customer relationships
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	15 years 7 months 6 days
Gross Carrying Amount	$ 233,162	154,591
Accumulated Amortization	(67,640)	(56,396)
Net Carrying Amount	$ 165,522	98,195
Technology
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	7 years 3 months 18 days
Gross Carrying Amount	$ 33,700	24,000
Accumulated Amortization	(15,095)	(12,120)
Net Carrying Amount	18,605	11,880
Trade names
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	0	0
Trade name (Indefinite lived)	$ 45,200	$ 45,200