ACCUMULATED OTHER COMPREHENSIVE INCOME - Summary of reclassification out of each component of accumulated other comprehensive income (loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 9,087,000	$ 9,876,000	$ 28,077,000	$ 32,723,000
Compensation and employee benefits	(7,306,000)	(6,640,000)	(22,490,000)	(21,552,000)
Income tax expense	0	0	0	0
Total reclassification for the period, net of tax	(4,041,000)	(1,432,000)	(9,224,000)	(4,466,000)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	0	0	0	0
Total reclassification for the period, net of tax	(1,623,000)	1,536,000	(4,889,000)	3,890,000
(Gains) losses on cash flow hedges: | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(1,620,000)	1,535,000	(4,882,000)	3,885,000
Amortization of post-retirement plan items: | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Compensation and employee benefits	$ (3,000)	$ 1,000	$ (7,000)	$ 5,000