| 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 |
| Cash flows from operating activities: | | | | | | | | |
| Net loss including non-controlling interests | -19.3 | -0.1 | 4.4 | | | | | |
| Adjustments to reconcile net loss including non-controlling interest to net cash from operating activities: | | | | | | | | |
| Depreciation and amortization | 38.2 | 37.4 | 40.8 | 43.7 | 47.9 | 47.3 | 49.1 | 49.4 |
| Impairment of fixed assets | 7.2 | 2.1 | 6.5 | 0.7 | 14.6 | 4.6 | 0.7 | 3.4 |
| Amortization of debt discount | 1.0 | 1.0 | 0.9 | 1.0 | 1.3 | 1.3 | 1.0 | 0.5 |
| Amortization of debt issuance costs | 0.4 | 0.6 | | | | | | |
| Share-based compensation expense | 3.6 | 2.6 | 1.9 | 1.8 | 1.4 | 1.9 | 2.2 | 1.3 |
| Net change in certain operating assets and liabilities | | | -24.5 | 1.5 | 9.2 | -21.0 | 0.9 | |
| Other | -0.4 | -1.5 | | | | | | |
| Total adjustments | 49.9 | 64.2 | 23.8 | 13.1 | 3.7 | 73.7 | 55.1 | 48.1 |
| Net cash provided by operating activities | 30.6 | 64.1 | 28.2 | 21.2 | 24.9 | 4.8 | 67.4 | 60.1 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Capital expenditures | -16.2 | -11.9 | -10.2 | -19.7 | -30.5 | -42.1 | -30.9 | -22.5 |
| Acquisition of business | -21.7 | -31.3 | -18.2 | | | | -2.9 | |
| Net cash used in investing activities | -37.9 | -47.0 | -41.5 | -20.0 | -31.6 | -42.1 | -30.6 | -22.5 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Principal payments on 2013 Term Loan Facility | -20.1 | -2.1 | -2.1 | -2.3 | -3.0 | -16.7 | -315.7 | -36.0 |
| Prepayment of debt buy-back on 2013 Term Loan Facility | | | | | | | | |
| Proceeds from borrowings on Revolving Loan Facility | 9.5 | | | | | | | |
| Principal payments on mortgage and term loan | -0.2 | -0.1 | | | | | | |
| Proceeds from stock option exercises | 0.0 | 0.0 | 0.1 | 0.3 | 0.3 | 0.1 | 0.6 | 2.4 |
| Net cash provided by (used in) financing activities | -21.8 | 2.6 | -2.0 | -31.8 | -10.5 | 57.5 | -1.0 | -47.7 |
| |
| Summary of the change in certain operating assets and liabilities: | | | | | | | | |
| Decrease (increase) in accounts receivable | 0.1 | -0.8 | -1.0 | 0.8 | 1.4 | 0.0 | 2.9 | -0.6 |
| Increase in prepaid expenses and other current assets | 0.9 | 8.9 | -9.2 | 3.0 | 0.6 | -1.5 | -1.3 | -0.4 |
| (Decrease) increase in accounts payable, accrued expenses and accrued interest | 0.0 | 7.3 | 0.1 | -2.3 | 1.0 | -9.9 | 3.1 | -3.1 |
| Supplemental disclosures of cash flow information: | | | | | | | | |
| Cash payments for interest | 11.8 | 12.1 | 11.2 | 12.3 | 16.7 | 17.1 | 19.7 | 23.7 |
| Cash and cash equivalents | | | | | | | | |
| Restricted cash included in other assets | | | | | | | | |