LEASES - Maturities of lease liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
LEASES
2025 (excluding the nine months ended September 30, 2025)	$ 5,864		$ 5,864
Year 1	19,325		19,325		$ 20,764
Year 2	16,756		16,756		15,881
Year 3	12,827		12,827		12,949
Year 4	9,181		9,181		9,901
Year 5					7,134
Thereafter	81,082		81,082
Thereafter					79,843
Total lease payments	145,035		145,035		146,472
Less imputed interest	(55,121)		(55,121)		(57,512)
Total	$ 89,914		$ 89,914		$ 88,960
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Lease Liability, Current, Lease Liability, Noncurrent		Lease Liability, Current, Lease Liability, Noncurrent		Lease Liability, Current, Lease Liability, Noncurrent
Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]
2025 (excluding the nine months ended September 30, 2025)	$ 311		$ 311
Year 1	1,043		1,043		$ 1,649
Year 2	1,006		1,006		847
Year 3	737		737		825
Year 4	537		537		632
Year 5					516
Thereafter	1,658		1,658
Thereafter					1,630
Total lease payments	5,292		5,292		6,099
Less imputed interest	(1,219)		(1,219)		(1,402)
Total	$ 4,073		$ 4,073		$ 4,697
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Lease Liability, Current, Lease Liability, Noncurrent		Lease Liability, Current, Lease Liability, Noncurrent		Lease Liability, Current, Lease Liability, Noncurrent
Maturities of future undiscounted lease payments
2025 (excluding the nine months ended September 30, 2025)	$ 2,065		$ 2,065
2026	7,984		7,984
2027	6,648		6,648
2028	5,939		5,939
2029	5,260		5,260
Thereafter	5,227		5,227
Total future lease payments	33,123		33,123
Lease income	$ 2,474	$ 2,075	6,505	$ 6,293
Network asset
Maturities of future undiscounted lease payments
Lease income			$ 6,500	$ 6,300

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.