SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Cash and Noncash Related Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Cost of modules and parts sold sourced from engines originally within leasing equipment	$ 25,558	$ 38,300	$ 41,167
Transfers of engines from leasing equipment to inventory for manufacturing and sale	259,383	239,462	178,740
Transfers of inventory to leasing equipment for rebuilding and sale of engines	(255,845)	(223,129)	(78,788)
Total outflows related to manufacturing modules and parts - included in net cash (used in) provided by operating activities	(779,374)	(345,821)	(138,045)
Cash received for assets sold sourced from leasing equipment - inflow included in cash (used in) provided by operating activities	61,513	76,157	94,222
Cash received for sales of leasing equipment that include components sourced from inventory - inflow included in cash used in investing activities	1,058,961	436,217	79,474
Cash paid for engine and aircraft inventory - outflow included in cash provided by (used in) operating activities	$ (325,056)	$ (8,280)	$ 0