Real Estate Fund Investments (Narrative) (Details)		12 Months Ended
	Dec. 27, 2023 USD ($)	Dec. 31, 2023 USD ($) investment	Sep. 28, 2023	Jun. 30, 2020 USD ($)
Joint Venture
Investments Holding [Line Items]
Number of investments held by fund | investment		1
Real estate fund investment carrying value		$ 0
Fair value below cost		28,815,000
Unfunded commitments of fund		23,074,000
Joint Venture | Vornado Realty Trust
Investments Holding [Line Items]
Unfunded commitments of fund		$ 5,769,000
Vornado Capital Partners Real Estate Fund
Investments Holding [Line Items]
Ownership interest		25.00%
Term of the fund, years		8 years
Investment period for commitments of the fund, years		3 years
Vornado Capital Partners Real Estate Fund | Joint Venture
Investments Holding [Line Items]
Payment for fund of incentive allocations	$ 14,667,000
Crowne Plaza Times Square Hotel Joint Venture | Joint Venture
Investments Holding [Line Items]
Ownership interest			57.10%
Debt default, amount				$ 274,355,000
Crowne Plaza Times Square Hotel Joint Venture | Joint Venture | Crowne Plaza Time Square Hotel
Investments Holding [Line Items]
Ownership percentage by noncontrolling owners			24.30%
Ownership percentage by parent			32.80%