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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands				9 Months Ended
	Jan. 20, 2022	Aug. 24, 2021	Jan. 01, 2021	Sep. 30, 2022	Sep. 30, 2021
Equipment acquired and leasehold improvements				$ 61,000	$ 50,500
Property and equipment, net				515,569
Investment in joint ventures				$ 52,020
Contributions			$ 300
Simi Valley Imaging Group, LLC
Investment in joint ventures			400
Simi Adventist
Investment in joint ventures			$ 100
Aidence B.V
Shares issued (in shares)	1,141,234
Equity interest issued, value assigned	$ 30,600
Quantib B.V
Shares issued (in shares)	965,058
Equity interest issued, value assigned	$ 25,900
Tangent Associates LLC
Shares issued (in shares)		67,658
Equity interest issued, value assigned		$ 2,000