Goodwill and Other Intangible Assets, Net (Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule of intangible assets
Accumulated Amortization	$ (177,262)	$ (155,659)
Finite-lived intangible assets	164,870
Intangible assets, gross carrying amount	387,332	388,019
Total acquired intangible assets, Net carrying amount	210,070	232,360
Trade names
Schedule of intangible assets
Indefinite lived intangible assets	$ 45,200	45,200
Facility management contracts
Goodwill [Line Items]
Amortization period	16 years 3 months 18 days
Schedule of intangible assets
Gross Carrying Amount	$ 308,432	308,419
Accumulated Amortization	(148,171)	(127,481)
Finite-lived intangible assets	$ 160,261	180,938
Covenants not to compete
Goodwill [Line Items]
Amortization period	1 year
Schedule of intangible assets
Gross Carrying Amount	$ 0	700
Accumulated Amortization	0	(700)
Finite-lived intangible assets	$ 0	0
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	(29,091)	(27,478)
Finite-lived intangible assets	$ 4,609	$ 6,222