Segment Information - Components of Segment Revenues and Adjusted EBITDA (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022		Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Segment Revenues	$ 159,101	$ 139,910		$ 290,529	$ 274,590
Segment Adjusted EBITDA	21,191	16,513	[1]	37,794	32,964	[1]
Discontinuing Specialty Lab
Segment Reporting Information [Line Items]
Segment Revenues	$ 2,400	3,400		$ 3,900	9,000
Segment Adjusted EBITDA		(900)			400
Start-up Losses and Investment in New Services
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA		$ 900			$ 1,700

[1] Includes the add back of start-up losses and investment in new services of $0.9 million and $1.7 million for the three and six months ended June 30, 2022, respectively .