Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of intangible assets
Intangible assets, gross carrying amount	$ 387,298	$ 387,332
Accumulated Amortization	(199,551)	(177,262)
Total acquired intangible assets, Net carrying amount	187,747	210,070
Net Carrying Amount	142,547
Trade names
Schedule of intangible assets
Indefinite lived intangible assets	45,200	45,200
Facility management contracts
Schedule of intangible assets
Gross Carrying Amount	308,398	308,432
Accumulated Amortization	(168,848)	(148,171)
Net Carrying Amount	$ 139,550	160,261
Amortization period	16 years 3 months 18 days
Technology
Schedule of intangible assets
Gross Carrying Amount	$ 33,700	33,700
Accumulated Amortization	(30,703)	(29,091)
Net Carrying Amount	$ 2,997	$ 4,609
Amortization period	7 years 3 months 18 days