Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (60,902)	$ (53,404)
Net Carrying Amount	117,791
Intangible Assets, Gross (Excluding Goodwill)	223,893	216,804
Intangible Assets, Net (Excluding Goodwill)	162,991	163,400
Facility management contracts
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	13 years 4 months 24 days
Gross Carrying Amount	154,693	151,604
Accumulated Amortization	(50,497)	(44,646)
Net Carrying Amount	104,196	106,958
Technology
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	7 years
Gross Carrying Amount	24,000	21,200
Accumulated Amortization	(10,405)	(8,758)
Net Carrying Amount	13,595	12,442
Trade names
Schedule of Finite and Indefinite-Lived Intangible Assets [Line Items]
Accumulated Amortization	0	0
Trade name (Indefinite lived)	$ 45,200	$ 44,000