| In millions, except per share items | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 | Dec-31-09 | Dec-31-08 |
| | 20-F | 20-F | 20-F | 20-F | 20-F | 20-F | 20-F |
| Net revenues: | | | | | | | |
| Sales revenue, services | 674.3 | 578.1 | 499.9 | 407.2 | 334.1 | 270.0 | 253.5 |
| |
| Cost of revenues: | | | | | | | |
| Cost of services | -422.5 | -366.5 | -316.7 | -250.7 | -206.5 | -161.6 | -157.1 |
| Gross profit | 251.7 | 211.6 | 183.2 | 156.4 | 127.6 | 108.4 | 96.3 |
| |
| Operating (expenses) income | | | | | | | |
| Selling and marketing expenses | 0.7 | 0.7 | 15.3 | 10.3 | 0.1 | 7.4 | 7.4 |
| General and administrative expenses | 22.7 | 15.5 | 14.4 | 11.5 | 10.4 | 15.6 | 49.4 |
| Research and development expenses | 21.2 | 11.0 | 8.1 | 5.4 | 0.4 | | |
| Impairment charges for goodwill and intangible assets | | | -3.4 | | | | |
| Revaluation of contingent consideration | | | 3.4 | | | | |
| Total operating expenses | -68.0 | -43.4 | -55.8 | -38.6 | -21.4 | 38.6 | -117.3 |
| Operating income | 103.7 | 105.2 | 89.4 | 83.8 | 71.5 | 52.1 | -20.9 |
| Investment income (loss) | 12.7 | -4.0 | -0.6 | | | | |
| Other income, net | -9.0 | 13.9 | 4.9 | 2.7 | 26.3 | 5.3 | -1.0 |
| Interest expense | -0.6 | -0.4 | -1.0 | -0.4 | -0.3 | -0.8 | -1.4 |
| Interest income | 0.0 | 0.0 | 0.0 | 6.1 | 1.6 | 0.0 | 2.3 |
| Income before income taxes | 136.6 | 138.0 | 104.0 | 97.6 | 101.1 | 59.0 | -19.0 |
| Income tax expense | -24.5 | -23.5 | -0.8 | -16.6 | | -0.4 | -4.0 |
| Tax rate | | | | | 0.0% | | 21.2% |
| Net income | 112.2 | 114.6 | 86.6 | 81.0 | 90.8 | 52.9 | -64.2 |
| |
| Earnings per share | | | | | | | |
| Basic | $0.20 | $0.20 | $0.15 | $0.14 | $0.16 | $0.10 | ($0.13) |
| Diluted | $0.19 | $0.20 | $0.15 | $0.13 | $0.15 | $0.09 | ($0.13) |
| |
| Other comprehensive income, net of tax: | | | | | | | |
| Currency translation adjustments | -11.9 | 15.8 | 1.4 | 18.8 | 9.4 | -0.1 | |
| Unrealized gains on available-for-sale securities | 2.5 | 4.5 | | | | | |
| |
| Unrealized loss on cash flow hedges | | | | | | | |
| Subtotal | | | | | | | |
| Comprehensive income | 101.2 | 134.8 | 87.9 | 99.8 | 100.2 | | |
| |
| Shares used in calculating basic earnings per share | 563.8 | 567.3 | 568.4 | 567.1 | 556.3 | 543.9 | 510.2 |
| Shares used in calculating diluted earnings per share | 576.6 | 582.0 | 582.4 | 603.5 | 597.5 | 589.2 | 510.2 |