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DEBT - Schedule of Components of Term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Notes Payable
Debt Instrument [Line Items]
Senior note balances	$ 1,045,058	$ 1,013,661
Less: Unamortized debt issuance costs	(65,064)	(56,391)
Unsecured Term Loans
Debt Instrument [Line Items]
Senior note balances	1,500,000	2,200,000
Unsecured senior notes
Debt Instrument [Line Items]
Senior note balances	9,675,000	8,025,000
Less: Discount on unsecured senior notes, net	(194,289)	(222,254)
Unsecured senior notes | Life Storage, Inc
Debt Instrument [Line Items]
Unamortized cash discount	293,134
Term Debt
Debt Instrument [Line Items]
Senior note balances	12,220,058	11,238,661
Total	11,960,705	$ 10,960,016
Bonds
Debt Instrument [Line Items]
Unamortized debt premium	13,853
Assumed Debt From Merger
Debt Instrument [Line Items]
Unamortized cash discount	$ 10,049

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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