| In millions, except per share items | Sep-30-14 | Jun-30-14 | Mar-31-14 | Dec-31-13 | Sep-30-13 | Jun-30-13 | Mar-31-13 | Dec-31-12 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Revenue | 375.3 | 373.7 | 376.5 | 389.7 | 386.6 | 386.4 | 387.0 | 378.4 |
| Revenue growth | -2.9% | -3.3% | -2.7% | 3.0% | -1.5% | -3.6% | -3.8% | -5.0% |
| Costs and expenses (exclusive of depreciation and amortization expense shown separately below): | | | | | | | | |
| Direct cost of services | 71.5 | 69.4 | 69.7 | 73.5 | 74.2 | 73.5 | 72.6 | 69.0 |
| Network and infrastructure | 56.7 | 57.6 | 58.0 | 59.0 | 58.3 | 56.8 | 55.4 | 53.1 |
| Sales and marketing | 100.1 | 100.1 | 101.8 | 107.0 | 103.6 | 101.4 | 102.6 | 101.9 |
| Product research and development | 74.6 | 74.4 | 73.4 | 72.4 | 68.9 | 66.0 | 63.8 | 62.5 |
| General and administrative | 47.5 | 48.9 | 50.3 | 56.3 | 62.8 | 64.5 | 62.2 | 56.0 |
| Goodwill impairment | | | | | | | 21.2 | |
| Depreciation and amortization | 25.8 | 24.9 | 23.4 | 22.1 | 20.8 | 20.0 | 19.9 | 20.3 |
| Amortization of acquisition-related intangibles | 8.6 | 8.7 | 8.8 | 8.5 | 7.5 | 6.5 | 4.2 | 2.3 |
| Total costs and expenses | 384.9 | 383.9 | 385.4 | 420.0 | 592.6 | 585.2 | 579.0 | 544.0 |
| Income (loss) from operations | -9.6 | -10.3 | -8.9 | -30.3 | -206.0 | -198.8 | -192.0 | -165.6 |
| Operating margin | -2.6% | -2.7% | -2.4% | -7.8% | -53.3% | -51.5% | -49.6% | -43.8% |
| Interest income | 2.3 | 2.3 | 2.5 | 2.5 | 2.8 | 3.1 | 3.3 | 3.8 |
| Interest expense | -5.3 | -6.4 | -7.5 | -7.8 | -8.1 | -8.4 | -8.7 | -9.0 |
| Other income (expense), net | 1.4 | -1.0 | 5.0 | 16.3 | 21.4 | 21.1 | 16.0 | 4.8 |
| Loss on extinguishment of debt | | | -5.6 | | | | | |
| Income (loss) from continuing operations before income taxes | -16.9 | -20.9 | -14.4 | -19.4 | -189.9 | -183.1 | -181.4 | -165.9 |
| Income tax expense (benefit) | -7.9 | -0.2 | -0.9 | -0.9 | 17.4 | 17.3 | 18.5 | 18.7 |
| Tax rate | 46.5% | 1.1% | | 4.7% | -9.1% | -9.4% | | |
| Income (loss) from continuing operations | -9.0 | -20.6 | -13.6 | -18.5 | -207.3 | -200.4 | -200.2 | -189.5 |
| Income (loss) from discontinued operations, net of tax | 0.4 | -4.6 | -5.3 | -6.1 | -17.5 | -12.6 | -12.0 | -11.3 |
| Net income (loss) | -8.6 | -25.2 | -18.9 | -24.6 | -224.8 | -213.0 | -212.0 | -195.9 |
| |
| Income (loss) per share - basic: | | | | | | | | |
| Income (loss) from continuing operations (in dollars per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Income (loss) from discontinued operations (in dollars per share) | | | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Net income (loss) per share - basic (in dollars per share) | ($0.29) | ($0.83) | ($0.62) | ($0.79) | ($6.81) | ($6.43) | ($6.39) | ($5.90) |
| |
| Income (loss) per share - diluted: | | | | | | | | |
| Income (loss) from continuing operations (in dollars per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Income (loss) from discontinued operations (in dollars per share) | 0.0 | | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 |
| Net income (loss) per share - diluted (in dollars per share) | ($0.29) | ($0.83) | ($0.62) | ($0.79) | ($6.81) | ($6.43) | ($6.39) | ($5.90) |
| |
| Shares used in per-share calculation - basic (in shares) | 30.6 | 31.0 | 31.7 | 32.2 | 32.5 | 32.8 | 33.1 | 33.2 |
| Shares used in per-share calculation - diluted (in shares) | 30.7 | 31.0 | 31.7 | 32.2 | 32.5 | 32.8 | 33.1 | 33.4 |