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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011
Cash Flows from Operating Activities |  |  |  |
Net income/(loss) | $ 55.6 |  | $ 29.3 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |
Depreciation and amortization | 8.3 | [1] | 11.1 | [1]
Impairment of Octane Additives segment goodwill | 0.9 |  | 1.7 |
Deferred taxes | 0.9 |  | (4.0) |
Profit on disposal of property, plant and equipment | (0.1) |  | 0 |
Non-cash issue of promissory note in civil complaint settlement | 0 |  | 15.0 |
Non-cash issue of treasury stock in civil complaint settlement | 0 |  | 5.0 |
Changes in working capital: |  |  |  |
Trade and other accounts receivable | 6.3 |  | (7.8) |
Inventories | (7.6) |  | (15.7) |
Prepaid expenses | (0.2) |  | (1.0) |
Accounts payable and accrued liabilities | 7.5 |  | 0.2 |
Excess tax benefit from stock based payment arrangements | (2.1) |  | (1.2) |
Accrued income taxes | 1.0 |  | (9.6) |
Movement on plant closure provisions | 0 |  | (0.5) |
Cash contributions to defined benefit pension plans | (7.0) |  | (6.9) |
Non-cash expense of defined benefit pension plans | 0.1 |  | 0.3 |
Stock option compensation | 2.4 |  | 2.3 |
Movements on other non-current assets and liabilities | (2.0) |  | 2.7 |
Net cash provided by operating activities | 64.0 |  | 20.9 |
Cash Flows from Investing Activities |  |  |  |
Capital expenditures | (5.7) |  | (5.9) |
Capitalization of internally developed software and other costs | (6.4) |  | 0 |
Proceeds on disposal of property, plant and equipment | 0.2 |  | 0 |
Purchase of short-term investments | (3.3) |  | (4.2) |
Sale of short-term investments | 4.2 |  | 3.6 |
Net cash (used in) investing activities | (11.0) |  | (6.5) |
Cash Flows from Financing Activities |  |  |  |
Net receipt of revolving credit facility | 4.0 |  | 43.0 |
Repayment of term loan | 0 |  | (15.0) |
Repayment of promissory note | (5.0) |  | 0 |
Excess tax benefit from stock based payment arrangements | 2.1 |  | 1.2 |
Issue of treasury stock | 0.8 |  | 0.7 |
Repurchase of common stock | (1.4) |  | (19.5) |
Net cash provided by financing activities | 0.5 |  | 10.4 |
Effect of foreign currency exchange rate changes on cash | (0.1) |  | 0.2 |
Net change in cash and cash equivalents | 53.4 |  | 25.0 |
Cash and cash equivalents at beginning of period | 76.2 |  | 107.1 |
Cash and cash equivalents at end of period | $ 129.6 |  | $ 132.1 |
[1] | Amortization of deferred finance costs of $0.3 million (2011-$0.5 million) are included in depreciation and amortization in the cash flow statement but in interest expense in the income statement.

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- Definition The amount of cash or cash equivalents contributed by the entity to fund its pension plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 + Details
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