SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Cash and Noncash Related Activities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Cost of modules and parts sold sourced from engines originally within leasing equipment	$ 33,663	$ 30,045
Transfers of engines from leasing equipment to inventory for manufacturing and sale	143,678	147,285
Transfers of inventory to leasing equipment for rebuilding and sale of engines	(159,876)	(53,533)
Total outflows related to manufacturing modules and parts - included in net cash (used in) provided by operating activities	(270,679)	(81,109)
Cash received for assets sold sourced from Leasing equipment - inflow included in cash (used in) provided by operating activities	$ 56,670	$ 59,115