v3.26.1
ACQUISITIONS (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
center
acquisition
Business Combination [Line Items]      
Payments to acquire business, net of cash acquired $ 0 $ 5,106  
Goodwill $ 1,818,900   $ 1,824,175
2025 Acquisitions      
Business Combination [Line Items]      
Number of business acquisition transactions | acquisition     2
Payments to acquire business, net of cash acquired     $ 6,800
Cash acquired     300
Contingent consideration recorded     100
Goodwill     4,900
Intangible assets     $ 500
UNITED KINGDOM | 2025 Acquisitions      
Business Combination [Line Items]      
Number of centers acquired | center     3