REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 2,084,279	$ 1,767,087	$ 1,491,391
Screening
Disaggregation of Revenue [Line Items]
Revenue recognized	1,424,703	1,062,308	815,067
Screening | Medicare Parts B & C
Disaggregation of Revenue [Line Items]
Revenue recognized	545,458	438,646	365,471
Screening | Commercial
Disaggregation of Revenue [Line Items]
Revenue recognized	743,238	569,944	409,671
Screening | Other
Disaggregation of Revenue [Line Items]
Revenue recognized	136,007	53,718	39,925
Precision Oncology
Disaggregation of Revenue [Line Items]
Revenue recognized	601,488	561,676	440,493
Precision Oncology | Medicare Parts B & C
Disaggregation of Revenue [Line Items]
Revenue recognized	197,327	197,394	165,799
Precision Oncology | Commercial
Disaggregation of Revenue [Line Items]
Revenue recognized	177,518	180,177	153,410
Precision Oncology | Other
Disaggregation of Revenue [Line Items]
Revenue recognized	108,905	74,192	43,800
Precision Oncology | International
Disaggregation of Revenue [Line Items]
Revenue recognized	117,738	109,913	77,484
COVID-19 Testing
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 58,088	$ 143,103	$ 235,831