FAIR VALUE MEASUREMENTS - Schedule of Fair Value of Contingent Consideration (Details) - Fair Value, Recurring $ in Thousands	Jun. 30, 2021 USD ($)
Liabilities:
Current contingent considerations	$ 0
Long-term contingent considerations	0
Total liabilities	0
Level 1
Liabilities:
Current contingent considerations	0
Long-term contingent considerations	0
Total liabilities	0
Level 2
Liabilities:
Current contingent considerations	0
Long-term contingent considerations	0
Total liabilities	0
Level 3
Liabilities:
Current contingent considerations	164,952
Long-term contingent considerations	67,449
Total liabilities	$ 232,401