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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Concentration Risk [Line Items]
Rebate receivable	$ 51,000		$ 51,000		$ 53,400
Investments in equity-method investees	19,500		19,500		$ 19,400
Proportionate share of earnings in equity-method investees	$ 1,300	$ 1,500	4,107	$ 4,065
Distributions received from the investees		$ 1,500	$ 4,000	$ 2,500
Revenue from Contract with Customer Benchmark \| Company's Largest Payer \| Largest Payer
Concentration Risk [Line Items]
Concentration risk	14.00%	14.00%	14.00%	15.00%
Revenue from Contract with Customer Benchmark \| Governmental Healthcare Programs \| Government Healthcare Programs
Concentration Risk [Line Items]
Concentration risk	11.00%	12.00%	12.00%	12.00%
Accounts Receivable, Benchmark \| Governmental Healthcare Programs \| Government Healthcare Programs
Concentration Risk [Line Items]
Concentration risk			11.00%		13.00%
Cost of Goods and Service, Product and Service Benchmark \| Medical Supply Vendors \| Four Vendors
Concentration Risk [Line Items]
Concentration risk	73.00%	74.00%	73.00%	73.00%