| In millions, except per share items | Sep-30-19 | Jun-30-19 | Mar-31-19 | Dec-31-18 | Sep-30-18 | Jun-30-18 | Mar-31-18 | Dec-31-17 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Cash flows from operating activities: | | | | | | | | |
| Net income | 24.0 | 9.8 | 5.0 | 5.7 | 14.7 | 14.2 | 0.5 | 99.0 |
| Adjustments to reconcile net income to net cash from (used in) operating activities | | | | | | | | |
| Amortization of intangible assets | 18.8 | 18.8 | 18.7 | 18.8 | 18.9 | 18.9 | 18.3 | 18.8 |
| Depreciation of property and equipment in operating expenses | 3.1 | 2.9 | 2.9 | 2.7 | 2.6 | 2.6 | 2.2 | 2.3 |
| Depreciation of property and equipment in cost of revenue | 0.9 | | | | 1.2 | | | |
| Provision for sales returns and credit losses | -0.5 | 1.1 | 0.6 | 0.1 | 0.6 | -0.5 | 0.6 | 0.6 |
| Amortization of debt issuance costs | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | 0.9 | 1.0 | 1.3 |
| Loss on extinguishment of debt | 0.2 | 0.6 | 0.5 | 0.5 | 0.5 | | 13.4 | 0.7 |
| Noncash lease income | -1.0 | -0.3 | -2.3 | -1.7 | -1.8 | 0.8 | | -1.6 |
| Share-based compensation expense | 1.6 | 2.6 | 2.2 | 2.6 | 2.1 | 1.4 | 3.0 | 1.8 |
| Deferred income tax benefit | -2.4 | 0.9 | 2.1 | 0.9 | -3.9 | -5.4 | 0.9 | -83.4 |
| Other | 0.1 | | 0.1 | | | -0.1 | 0.1 | |
| Change in assets and liabilities, net of acquisitions and dispositions: | | | | | | | | |
| Unbilled and accounts receivable | -27.4 | -71.9 | 18.5 | -2.2 | -47.2 | -30.5 | 15.5 | 9.7 |
| Inventory | -1.0 | 2.2 | -4.6 | 12.3 | -7.4 | -0.7 | 3.2 | -4.1 |
| Prepaid expenses and other assets | -36.2 | -27.0 | -35.8 | 6.8 | -30.7 | -4.3 | -21.2 | 31.8 |
| Accounts payable – trade | -11.8 | 4.7 | 16.4 | -4.3 | 23.2 | 21.9 | -6.2 | -40.2 |
| Accrued expenses and other liabilities | -1.5 | 55.1 | 4.2 | 29.1 | 29.0 | 28.7 | -14.7 | 2.8 |
| Net cash provided by (used in) operating activities | -32.3 | 1.4 | 30.6 | 73.3 | 2.7 | 49.3 | 18.1 | 41.0 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Additions of equipment under sales-type and direct financing leases | -32.9 | -17.0 | -39.9 | -49.6 | -33.3 | -27.7 | -30.9 | -30.0 |
| Proceeds from collection of financing receivables | 0.9 | 0.4 | 4.1 | 1.5 | 1.2 | 1.1 | 0.8 | 1.1 |
| Additions to equipment under operating leases | -0.2 | -1.0 | -0.3 | | | -0.1 | -0.3 | -0.9 |
| Proceeds from disposition of equipment under operating leases | 0.4 | 0.1 | 0.5 | 0.1 | | | | 0.1 |
| Purchases of property and equipment | -2.2 | -3.8 | -3.0 | -4.5 | -3.8 | -3.9 | -3.3 | -2.5 |
| Net cash used in investing activities | -34.0 | -21.3 | -38.5 | -52.6 | -35.9 | -63.9 | -33.7 | -32.0 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Proceeds from issuance of common stock under share-based compensation plans | 4.1 | 1.3 | 2.3 | 0.5 | 1.0 | 2.1 | 1.4 | 1.6 |
| Common stock repurchased | | | | | -158.6 | | | |
| Dividends paid | -3.3 | -16.5 | 9.9 | -3.3 | | | | |
| Proceeds from the discounting of financing receivables | 29.2 | 20.1 | 50.3 | 50.0 | 41.1 | 33.1 | 34.5 | 29.2 |
| Retirements of discounted financing receivables | -0.4 | -2.0 | -4.2 | -12.5 | -4.9 | -4.3 | -3.2 | -2.3 |
| Deferred financing costs | | 0.1 | -0.5 | | -0.3 | | -0.6 | -0.6 |
| Borrowings of term loans, net of original issue discount | | | | | 158.1 | | 138.2 | |
| Repayments of term loans | -10.0 | -25.0 | -25.0 | -25.0 | -25.0 | -5.0 | -25.0 | -25.0 |
| Net change in accounts payable — floor plan | 44.0 | 30.4 | -13.6 | -29.7 | 15.0 | 0.8 | 10.2 | -16.1 |
| Net cash provided by financing activities | 63.6 | 21.6 | 6.0 | -20.0 | 26.4 | 26.7 | 19.8 | -13.2 |
| Net decrease in cash and cash equivalents | -2.7 | 1.7 | -1.9 | 0.7 | -6.8 | 12.1 | 4.2 | -4.2 |
| |
| Beginning of the period | | | | | | | | |
| End of the period | | | | | | | | |
| Supplemental disclosures of cash flow information | | | | | | | | |
| Cash paid during the period for: | | | | | | | | |
| Interest | 11.7 | 12.2 | 12.0 | 10.6 | 9.7 | 8.8 | 13.4 | 8.4 |
| Income Taxes Paid, Net | 3.6 | 1.4 | 1.6 | 8.6 | 5.7 | -9.6 | 7.0 | 14.9 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 0.9 | | | | | | | |
| Reduction Of Discounted Lease Assets And Liabilities | 29.6 | 27.8 | 29.8 | 29.3 | 28.0 | 22.5 | 25.1 | 28.7 |