In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
REVENUES | | | | | | | | |
Rental and other property revenues | 190.3 | 169.8 | 151.5 | 143.7 | 132.2 | 1,005.4 | 995.9 | 981.3 |
Rental and other property revenues growth | 12.1% | 12.1% | 5.4% | 8.7% | -86.9% | 1.0% | 1.5% | -0.3% |
OPERATING EXPENSES | | | | | | | | |
Depreciation and amortization | | | | 64.0 | 49.4 | 366.2 | 333.1 | 306.3 |
General and administrative expenses | | | | 7.1 | 5.8 | 43.7 | 46.8 | 46.3 |
Total operating expenses | 547.4 | 377.2 | 165.8 | 128.6 | 108.7 | 811.5 | 749.1 | 725.1 |
Interest income | | | | 0.0 | 0.0 | 8.3 | 7.8 | 6.9 |
Interest expense | | | | -18.6 | -19.6 | -194.6 | -196.4 | -199.7 |
Mezzanine / Unconsolidated partnerships investment income (loss), net | | | | 1.5 | | | | |
Other income (expense), net | | | | -2.1 | 1.1 | | 6.1 | 0.4 |
Income (loss) before income tax | 109.4 | -18.6 | -15.9 | -3.2 | 3.7 | 316.2 | 464.4 | 63.9 |
Income tax benefit (expense) | -17.3 | 13.6 | 10.1 | 3.3 | -0.3 | 30.8 | 18.8 | 27.5 |
Net income (loss) | | | | 0.1 | 3.4 | 347.1 | 483.3 | 272.0 |
Net (income) loss attributable to common noncontrolling interests in Aimco Operating Partnership | 3.9 | -0.3 | -0.3 | 0.0 | -0.2 | -14.5 | 52.9 | 23.3 |
Net income (loss) attributable to Aimco | 78.5 | -6.2 | -5.3 | 0.3 | 3.2 | 306.9 | 417.8 | 236.0 |
|
Net income (loss) attributable to Aimco per common share - basic (Note 4) | $0.50 | ($0.04) | ($0.03) | | $0.02 | $2.02 | $2.68 | $1.52 |
Net income (loss) attributable to Aimco per common share - diluted (Note 4) | $0.49 | ($0.04) | ($0.03) | | $0.02 | $2.02 | $2.67 | $1.52 |
|
Weighted-average common shares/units outstanding - basic | 157.3 | 157.7 | 156.5 | 148.5 | 148.5 | 151.6 | 156.0 | 155.2 |
Weighted-average common shares/units outstanding - diluted | 158.8 | 157.7 | 156.5 | 148.6 | 148.6 | 152.1 | 156.4 | 155.6 |