| In millions, except per share items | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| ASSETS | | | | | | | | |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 18.8 | 48.1 | 30.3 | 45.6 | 76.2 | 93.5 | 73.6 | 37.8 |
| Accounts receivable (less allowance for doubtful accounts of $6,660 and $4,552 as of March 31, 2020 and December 31, 2019, respectively) | 3.0 | 3.1 | 2.2 | 1.2 | 1.9 | 3.7 | 3.7 | 6.5 |
| Prepaid corporate income taxes | 0.9 | 0.7 | 13.6 | 1.5 | 6.9 | 11.6 | 0.0 | 0.6 |
| Prepaid expenses and other current assets | 10.1 | 10.0 | 12.9 | 10.3 | 13.2 | 12.9 | 10.9 | 11.4 |
| Total current assets | 32.8 | 61.9 | 68.1 | 58.8 | 100.1 | 122.9 | 105.6 | 76.0 |
| Fixed assets, net | 146.9 | 157.7 | 151.5 | 170.6 | 195.3 | 233.6 | 244.0 | 256.9 |
| Goodwill | 33.0 | 21.9 | 6.2 | 1.0 | 1.0 | 32.6 | 32.9 | 32.8 |
| Intangible assets, net | 8.2 | 9.4 | 5.1 | 0.1 | 0.2 | 0.4 | 0.9 | |
| Other assets | 9.0 | 8.7 | 4.7 | 4.2 | 3.2 | 12.9 | 10.3 | 12.5 |
| Total assets | 794.3 | 261.5 | 236.7 | 235.9 | 303.1 | 409.8 | 413.8 | 404.8 |
| |
| LIABILITIES AND STOCKHOLDERS’ DEFICIT | | | | | | | | |
| Current liabilities: | | | | | | | | |
| Current portion of long-term debt | 178.4 | 21.1 | | | | | | |
| Current portion of mortgage and term loan | 0.2 | 0.3 | | | | | | |
| Accounts payable | 4.5 | 3.7 | 2.2 | 2.5 | 2.6 | 2.9 | 8.1 | 7.5 |
| Accrued expenses | 34.6 | 32.5 | 24.7 | 25.9 | 26.1 | 26.7 | 31.5 | 27.1 |
| Accrued interest | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.4 | 0.7 | 0.1 |
| Total current liabilities | 328.0 | 95.1 | 62.7 | 65.2 | 72.1 | 70.6 | 77.8 | 87.8 |
| Long-term mortgage and term loan | 5.0 | 5.1 | | | | | | |
| Other liabilities | 12.2 | 11.3 | 10.1 | 11.5 | 10.2 | 8.6 | 8.1 | 11.5 |
| Total liabilities | 882.6 | 334.2 | 314.6 | 321.5 | 399.3 | 527.9 | 457.3 | 460.3 |
| |
| Commitments and Contingencies (Note 15) | | | | | | | | |
| Stockholders’ deficit: | | | | | | | | |
| Preferred stock, $0.001 par value; no shares issued and outstanding at both March 31, 2020 and December 31, 2019 | | | | | | | | |
| Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid-in capital | 1.9 | -1.6 | -4.3 | -6.3 | -8.4 | -10.1 | -13.8 | -16.3 |
| Accumulated other comprehensive income | 1.9 | 1.8 | 1.2 | -0.2 | -0.5 | 0.4 | 2.1 | 1.2 |
| Accumulated deficit | -91.8 | -73.2 | -74.9 | -79.3 | -87.4 | -108.4 | -31.7 | -40.4 |
| Total Town Sports International Holdings, Inc. and Subsidiaries stockholders’ deficit | -87.9 | -73.0 | -78.0 | -85.7 | -96.2 | -118.1 | -43.5 | -55.5 |
| Non-controlling interests | -0.4 | 0.3 | | | | | | |
| Total stockholders’ deficit | -88.3 | -72.7 | -78.0 | | | | | |
| Total liabilities and stockholders’ deficit | 794.3 | 261.5 | 236.7 | 235.9 | 303.1 | 409.8 | 413.8 | 404.8 |