| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues: | | | | | | | | |
| Rental income | 121.1 | 126.1 | 152.8 | 135.4 | | | | |
| Interest income from mortgage loans | 32.8 | 31.4 | 30.0 | 28.2 | 26.8 | 27.3 | 22.1 | 16.6 |
| Interest and other income | 1.4 | 1.8 | 2.6 | 5.0 | 3.6 | 0.7 | 1.0 | 0.6 |
| Total revenues | 155.3 | 159.3 | 185.3 | 168.6 | 168.1 | 161.6 | 136.2 | 119.0 |
| Total revenues growth | -2.5% | -14.0% | 9.9% | 0.3% | 4.0% | 18.6% | 14.5% | 13.3% |
| Expenses: | | | | | | | | |
| Interest expense | -27.4 | -29.7 | -30.6 | -30.2 | -29.9 | -26.4 | -17.5 | -13.1 |
| Depreciation and amortization | 38.3 | 39.1 | 39.2 | 37.6 | 37.6 | 35.9 | 29.4 | 25.5 |
| Impairment loss | | 4.0 | | | 1.9 | 0.8 | 2.3 | |
| Provision for credit losses | 1.0 | 0.0 | 0.2 | 0.1 | -0.2 | 0.5 | 0.6 | 0.0 |
| Transaction costs | 4.4 | 0.3 | 0.4 | 0.1 | 0.1 | 0.2 | 0.7 | 0.2 |
| Property tax expense | 15.4 | 15.1 | 16.8 | | | | | |
| General and administrative expenses | 21.5 | 19.7 | 18.5 | 19.2 | 17.5 | 17.4 | 15.0 | 11.6 |
| Total expenses | 108.0 | 107.8 | 105.5 | 87.1 | 86.8 | 81.2 | 65.5 | 50.5 |
| |
| Other operating income: | | | | | | | | |
| Gain on sale of real estate, net | 7.5 | 44.1 | 2.1 | 70.7 | 3.8 | 3.6 | 0.6 | |
| Operating income | 54.8 | 95.6 | 81.9 | 152.2 | 85.1 | 84.0 | 70.7 | 68.4 |
| Operating margin | 35.3% | 60.0% | 44.2% | 90.3% | 50.6% | 52.0% | 51.9% | 57.5% |
| |
| Income from unconsolidated joint ventures | | | | | | | | |
| Net income | 56.2 | 95.7 | 80.9 | 155.1 | 87.3 | 85.1 | 73.1 | |
| Income allocated to non-controlling interests | -0.4 | -0.4 | -0.3 | -0.1 | | | | |
| Net income attributable to LTC Properties, Inc. | 55.9 | 95.3 | 80.5 | 155.0 | 87.3 | 85.1 | | 73.4 |
| Income allocated to participating securities | -0.5 | -0.4 | -0.4 | -0.4 | -0.4 | -0.4 | -0.5 | -0.5 |
| Net income available to common stockholders | 55.4 | 94.9 | 80.1 | 154.4 | 87.0 | 84.7 | 70.1 | 69.6 |
| |
| Earnings per common share: | | | | | | | | |
| Basic (in dollars per share) | $1.41 | $2.42 | $2.03 | $3.91 | $2.21 | $2.21 | $1.97 | $2.01 |
| Diluted (in dollars per share) | $1.41 | $2.42 | $2.02 | $3.89 | $2.20 | $2.21 | $1.94 | $1.99 |
| |
| Weighted average shares used to calculate earnings per common share: | | | | | | | | |
| Basic (in shares) | 39.2 | 39.2 | 39.6 | 39.5 | 39.4 | 38.4 | 35.6 | 34.6 |
| Diluted (in shares) | 39.2 | 39.3 | 39.8 | 39.8 | 39.6 | 38.6 | 37.3 | 36.6 |
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