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LEASES - Maturities of lease liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Lessor, Lease, Description [Line Items] |  |  |  |  |
2024 (excluding the six months ended June 30, 2024) | $ 9,353 |  | $ 9,353 |  |
Year 1 | 17,531 |  | 17,531 |  | $ 18,048
Year 2 | 13,288 |  | 13,288 |  | 16,022
Year 3 | 10,437 |  | 10,437 |  | 11,755
Year 4 | 8,263 |  | 8,263 |  | 9,327
Year 5 |  |  |  |  | 7,807
Thereafter | 83,250 |  | 83,250 |  |
Thereafter |  |  |  |  | 80,637
Total lease payments | 142,122 |  | 142,122 |  | 143,596
Less imputed interest | (56,683) |  | (56,683) |  | (57,133)
Total | $ 85,439 |  | $ 85,439 |  | $ 86,463
Operating Lease, Liability, Statement of Financial Position [Extensible List] | Lease Liability, Current, Lease Liability, Noncurrent |  | Lease Liability, Current, Lease Liability, Noncurrent |  | Lease Liability, Current, Lease Liability, Noncurrent
Finance lease liability |  |  |  |  |
2024 (excluding the six months ended June 30, 2024) | $ 1,077 |  | $ 1,077 |  |
Year 1 | 1,529 |  | 1,529 |  | $ 2,030
Year 2 | 746 |  | 746 |  | 1,488
Year 3 | 704 |  | 704 |  | 601
Year 4 | 551 |  | 551 |  | 534
Year 5 |  |  |  |  | 505
Thereafter |  |  |  |  | 2,145
Thereafter | 2,145 |  | 2,145 |  |
Total lease payments | 6,752 |  | 6,752 |  | 7,303
Less imputed interest | (1,525) |  | (1,525) |  | (1,662)
Total | $ 5,227 |  | $ 5,227 |  | $ 5,641
Finance Lease, Liability, Statement of Financial Position [Extensible List] | Lease Liability, Current, Lease Liability, Noncurrent |  | Lease Liability, Current, Lease Liability, Noncurrent |  | Lease Liability, Current, Lease Liability, Noncurrent
Lease income | $ 2,111 | $ 1,960 | $ 4,217 | $ 3,862 |
Maturities of future undiscounted lease payments |  |  |  |  |
2024 (excluding the six months ended June 30, 2024) | 3,669 |  | 3,669 |  |
2025 | 7,062 |  | 7,062 |  |
2026 | 6,730 |  | 6,730 |  |
2027 | 5,538 |  | 5,538 |  |
2028 | 5,157 |  | 5,157 |  |
Thereafter | 13,262 |  | 13,262 |  |
Total future lease payments | 41,418 |  | 41,418 |  |
Network asset |  |  |  |  |
Finance lease liability |  |  |  |  |
Lease income | $ 2,100 | $ 2,000 | $ 4,200 | $ 3,900 |

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