Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Schedule of intangible assets
Intangible assets, gross carrying amount	$ 387,324	$ 387,298
Accumulated Amortization	(214,530)	(199,551)
Total acquired intangible assets, Net carrying amount	172,794	187,747
Net Carrying Amount	127,594
Trade names
Schedule of intangible assets
Indefinite lived intangible assets	45,200	45,200
Facility management contracts
Schedule of intangible assets
Gross Carrying Amount	308,424	308,398
Accumulated Amortization	(182,851)	(168,848)
Net Carrying Amount	$ 125,573	139,550
Amortization period	16 years 3 months 18 days
Technology
Schedule of intangible assets
Gross Carrying Amount	$ 33,700	33,700
Accumulated Amortization	(31,679)	(30,703)
Net Carrying Amount	$ 2,021	$ 2,997
Amortization period	7 years 3 months 18 days