RECEIVABLES, NET - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Trade	$ 1,055,550	$ 1,051,618
Sales-type leases	134,726	132,003
Other, primarily warranty and insurance	41,481	41,753
Receivables, gross	1,231,757	1,225,374
Allowance for credit losses and other	(37,200)	(43,024)
Total	$ 1,194,557	$ 1,182,350