| In millions, except per share items | Jun-30-12 | Mar-31-12 | Dec-31-11 | Sep-30-11 | Jun-30-11 | Mar-31-11 | Dec-31-10 | Sep-30-10 |
| | 10-Q/A | 10-Q | 10-K | 10-Q | 10-Q/A | 10-Q | 10-K | 10-Q |
| Net income | 8.9 | 9.2 | 6.7 | 6.1 | 5.6 | 5.5 | 5.5 | 5.7 |
| Depreciation and amortization [+] | 0.6 | 0.6 | 0.6 | 0.7 | 0.5 | 0.5 | 0.5 | |
| Depreciation | 0.5 | 0.5 | 0.5 | 0.5 | 0.6 | 0.7 | 0.6 | |
| Amortization of intangible assets | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | |
| Deferred taxes | | | -0.1 | | | | 0.0 | |
| Change in working capital | -0.3 | 0.8 | -1.5 | -3.8 | -2.0 | -1.8 | -0.4 | |
| Other | -0.3 | 0.8 | -1.5 | -3.8 | -2.0 | -1.8 | -0.4 | |
| Other operating activities | -2.2 | -1.5 | 2.4 | 4.6 | 1.1 | 1.0 | -0.2 | |
| Cash from operations | 6.9 | 9.0 | 8.2 | 7.6 | 5.2 | 5.2 | 5.5 | |
| |
| Capital expenditures | -0.2 | -0.2 | -0.1 | -0.1 | -0.2 | -0.3 | -0.3 | |
| Purchases of property and equipment | -0.2 | -0.2 | -0.1 | -0.1 | -0.2 | -0.3 | -0.3 | |
| Purchases of short-term investments, net | 10.9 | -13.6 | -82.0 | -68.6 | -20.0 | 3.0 | 8.2 | |
| Purchases of short-term investments | -79.5 | -103.4 | -110.1 | -95.3 | -61.3 | -56.3 | -47.0 | |
| Sales of short-term investments | 90.4 | 89.8 | 28.1 | 26.7 | 41.2 | 59.3 | 55.2 | |
| Other cash from investing | 26.4 | 19.6 | 14.8 | 12.0 | 6.8 | 12.1 | 12.4 | |
| Cash from investing | 37.1 | 5.8 | -67.4 | -56.7 | -13.4 | 14.8 | 20.3 | |
| |
| Cash dividends paid | -4.2 | -4.1 | -4.0 | -3.9 | -2.5 | -2.5 | -2.5 | |
| Other cash from financing | 8.4 | 32.7 | 65.4 | 54.1 | 11.5 | -17.8 | -24.4 | |
| Cash from financing | 4.1 | 28.5 | 61.4 | 50.2 | 9.0 | -20.3 | -26.9 | |
| |
| Free cash flow | 6.7 | 8.9 | 8.0 | 7.5 | 5.0 | 4.9 | 5.2 | |
| Per share (diluted) | $2.34 | $3.10 | $2.81 | $2.61 | $1.74 | $1.71 | $1.80 | |
| |
| Cash paid for interest | 2.8 | 3.1 | 3.2 | 3.4 | 4.0 | 5.0 | | |