| In millions, except per share items | Mar-31-23 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| REVENUES | | | | | | | | |
| Rental revenues | | 197.6 | 199.2 | 206.1 | 212.5 | 207.1 | 201.2 | 199.1 |
| Rental revenues growth | | -4.6% | -1.0% | 3.5% | 6.8% | -2.9% | -10.1% | -12.0% |
| EXPENSES | | | | | | | | |
| Operating, including fees to Vornado of $1,539 and $1,378, respectively | | -86.8 | -88.8 | -91.1 | -93.1 | -94.1 | -90.5 | -88.4 |
| Depreciation and amortization | | 31.0 | 31.7 | 32.9 | 34.9 | 33.5 | 33.0 | 32.4 |
| General and administrative, including management fees to Vornado of $610 in each period | | 5.9 | 5.9 | 5.9 | 6.0 | 6.1 | 6.4 | 6.3 |
| Total expenses | | 123.8 | 126.4 | 130.0 | 134.0 | 133.7 | 129.8 | 127.1 |
| Interest and other income | | 1.6 | 0.6 | 0.6 | 0.7 | 0.7 | 1.3 | 2.7 |
| Interest and debt expense | | -19.4 | -19.0 | -19.7 | -20.3 | -19.7 | -20.8 | -24.2 |
| Net income | | 118.5 | 129.6 | 132.9 | 73.6 | 68.8 | 55.2 | 41.9 |
| |
| Net income per common share - basic (in usd per share) | | $23.12 | $25.28 | $25.93 | $14.36 | $13.43 | $10.79 | $8.19 |
| Net income per common share - diluted (in usd per share) | | $23.12 | $25.28 | $25.93 | $14.36 | $13.43 | $10.79 | $8.19 |
| |
| Weighted average shares outstanding - basic (in shares) | | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 |
| Weighted average shares outstanding - diluted (in shares) | | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 |