SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of of Cash and Noncash Related Activities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Accounting Policies [Abstract]
Cost of modules and parts sold sourced from engines originally within leasing equipment	$ 1,686	$ 10,130
Transfers of engines from leasing equipment to inventory for manufacturing and sale	89,629	67,815
Transfers of inventory to leasing equipment for rebuilding and sale of engines	(102,932)	(85,928)
Total outflows related to manufacturing modules and parts - included in net cash used in operating activities	(215,888)	(159,607)
Cash received for assets sold sourced from leasing equipment - inflow included in net cash used in operating activities	11,217	21,182
Cash received for sales of leasing equipment that include components sourced from inventory - inflow included in net cash provided by investing activities	280,667	145,450
Cash paid for engine and aircraft inventory - outflow included in net cash used in operating activities	$ (156,339)	$ (15,835)