Goodwill and Other Intangible Assets, Net (Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Schedule of intangible assets
Accumulated Amortization	$ (108,152)	$ (87,793)
Finite-lived intangible assets	158,684
Intangible assets, gross carrying amount	312,036	311,941
Total acquired intangible assets, Net carrying amount	203,884	224,148
Trade names
Schedule of intangible assets
Indefinite lived intangible assets	$ 45,200	45,200
Facility management contracts
Goodwill [Line Items]
Amortization period	15 years 7 months 6 days
Schedule of intangible assets
Gross Carrying Amount	$ 233,136	233,041
Accumulated Amortization	(87,256)	(71,538)
Finite-lived intangible assets	$ 145,880	161,503
Technology
Goodwill [Line Items]
Amortization period	7 years 3 months 18 days
Schedule of intangible assets
Gross Carrying Amount	$ 33,700	33,700
Accumulated Amortization	(20,896)	(16,255)
Finite-lived intangible assets	$ 12,804	$ 17,445