| In millions, except per share items | Dec-31-11 | Dec-31-10 | Dec-31-09 | Dec-31-08 | Dec-31-07 | Dec-31-06 | Dec-31-05 | Dec-31-04 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K/A | 10-K | 10-K |
| Net income | -17.4 | 0.4 | 1.3 | -8.1 | 2.5 | -5.8 | -5.5 | -9.0 |
| Depreciation and amortization [+] | 35.2 | 28.7 | 27.4 | 16.5 | 6.9 | 4.8 | 4.9 | 4.5 |
| Depreciation | | | | | | | | 4.4 |
| Amortization | | | | | | | | 0.1 |
| Stock-based compensation | 21.9 | 14.9 | 11.0 | 11.4 | 8.0 | 5.7 | 0.4 | 0.5 |
| Tax benefit from stock-based compensation | 0.1 | -0.3 | -0.3 | | | | | |
| Change in working capital [+] | -25.7 | -11.1 | 0.6 | 4.2 | 14.4 | 4.4 | -1.2 | -7.1 |
| Accounts receivable | -26.0 | -11.0 | 4.4 | -11.7 | -2.6 | -12.3 | -0.2 | -6.4 |
| Other current assets | -3.8 | -8.4 | -1.6 | | | | | |
| Other | 4.1 | 8.4 | -2.2 | 15.9 | | | | |
| Other operating activities | 17.3 | 3.1 | 10.6 | -6.2 | -1.6 | 0.2 | 0.5 | 3.0 |
| Cash from operations | 31.4 | 35.8 | 50.7 | 17.8 | 30.2 | 9.4 | -0.9 | -8.2 |
| |
| Capital expenditures | -15.9 | -14.5 | -9.1 | -11.1 | -13.2 | -10.3 | -3.2 | -3.4 |
| Purchases of property and equipment | -15.9 | -14.5 | -9.1 | -11.1 | -13.2 | -10.3 | -3.2 | -3.4 |
| Purchases of intangible assets | -1.2 | | | | | | | |
| Acquisitions | -46.6 | -137.5 | | -49.7 | -3.3 | | -3.9 | |
| Purchases of short-term investments | | | | -2.5 | | | | |
| Purchases of short-term investments | | | | -2.5 | | | | |
| Other cash from investing | 0.2 | 0.4 | 0.4 | 0.4 | | | | |
| Cash from investing | -63.4 | -151.6 | -8.7 | -62.8 | -13.8 | -12.0 | -8.5 | -3.6 |
| |
| Cash dividends paid | | | | | | | -0.2 | |
| Issuance of common stock, net | | | 144.4 | | | | | |
| Option exercises | 14.6 | 17.5 | 9.6 | | | | | |
| Financing costs | -0.8 | | | | | | | |
| Other cash from financing | 21.5 | 30.1 | 16.9 | 8.5 | | | | |
| Cash from financing | 7.7 | 12.6 | 151.7 | 8.5 | 10.1 | 2.2 | 63.0 | -0.2 |
| |
| Free cash flow | 15.5 | 21.3 | 41.5 | 6.7 | 17.0 | -0.9 | -4.1 | -11.5 |
| Per share (diluted) | $0.38 | $0.52 | $1.28 | $0.24 | $0.59 | ($0.05) | ($0.89) | ($206.09) |
| |
| Cash paid for interest | 0.0 | 0.0 | 0.1 | | | | | |
| Cash paid for income taxes | -0.5 | 2.5 | 0.3 | | | | | |