SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION (Details)	Dec. 31, 2024 USD ($) renewalOption $ / shares	Dec. 31, 2023 $ / shares
Significant Accounting Policies and Basis of Presentation [Line Items]
Allowance for credit loss, individually evaluated loans, threshold	$ 500,000
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Lessee, operating lease, options to renew | renewalOption	1
Class A
Significant Accounting Policies and Basis of Presentation [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 1	$ 1
Class B
Significant Accounting Policies and Basis of Presentation [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 1	$ 1
Minimum | Rail Equipment
Significant Accounting Policies and Basis of Presentation [Line Items]
Useful Life (years)	40 years
Minimum | Other Equipment
Significant Accounting Policies and Basis of Presentation [Line Items]
Useful Life (years)	3 years
Maximum | Rail Equipment
Significant Accounting Policies and Basis of Presentation [Line Items]
Useful Life (years)	50 years
Maximum | Other Equipment
Significant Accounting Policies and Basis of Presentation [Line Items]
Useful Life (years)	10 years
Investor dependent - early stage
Significant Accounting Policies and Basis of Presentation [Line Items]
Allowance for credit loss, classification threshold	$ 5,000,000
Investor dependent - mid stage | Minimum
Significant Accounting Policies and Basis of Presentation [Line Items]
Allowance for credit loss, classification threshold	5,000,000
Investor dependent - mid stage | Maximum
Significant Accounting Policies and Basis of Presentation [Line Items]
Allowance for credit loss, classification threshold	15,000,000
Investor dependent - later stage | Minimum
Significant Accounting Policies and Basis of Presentation [Line Items]
Allowance for credit loss, classification threshold	$ 15,000,000