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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Percent of Total Rental Revenue For the years ended December 31, 2022, 2021 and 2020, the six properties listed below accounted for the highest respective percentages of total rental revenues.
Year Ended December 31,
202220212020
Empire State Building29.9 %31.7 %32.8 %
One Grand Central Place12.4 %12.6 %12.4 %
111 West 33rd Street11.2 %11.3 %10.5 %
1400 Broadway8.3 %8.9 %8.0 %
250 West 57th Street6.0 %5.8 %5.7 %
First Stamford Place4.7 %5.2 %5.4 %
Schedule of Contributions to Multiemployer Plans Contributions we made to the multi-employer plans for the years ended December 31, 2022, 2021 and 2020 are included in the table below (amounts in thousands):
For the Year Ended December 31,
Benefit Plan202220212020
Pension Plans (pension and annuity)*
$2,958 $2,165 $2,383 
Health Plans** 8,618 6,214 6,873 
Other*** 460 305 416 
Total plan contributions
$12,036 $8,684 $9,672 
*    Pension plans include $0.8 million, $0.7 million and $0.8 million for the years ended 2022, 2021 and 2020, respectively, to multiemployer plans not discussed above.
** Health plans include $1.5 million, $1.4 million and $1.4 million for the years ended 2022, 2021 and 2020, respectively, to multiemployer plans not discussed above.
*** Other consists of union costs which were not itemized between pension and health plans. Other includes $0.2 million, $0.2 million and $0.3 million for the years ended 2022, 2021 and 2020, respectively, in connection with other multiemployer plans not discussed above.