Goodwill and Other Intangible Assets, Net (Amortization Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 19,300	$ 15,200	$ 14,600
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	20,352
2017	20,320
2018	17,460
2019	17,132
2020	17,133
Thereafter	86,551
Finite-lived intangible assets	$ 178,948
Facility Management Contracts
Finite-Lived Intangible Assets [Line Items]
Weighted average period before renewal or extension	1 year 9 months 20 days
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-lived intangible assets	$ 161,503	$ 98,195