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Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash Flows from Operating Activities |  |  |  |  |  |
Net income | $ 68.3 |  | $ 48.9 |  | $ 73.7 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Depreciation and amortization | 11.5 | [1] | 14.4 | [1] | 15.4 | [1]
Impairment of Octane Additives segment goodwill | 1.2 |  | 2.0 |  | 2.2 |
Deferred taxes | 12.6 |  | (4.0) |  | (14.9) |
Profit on disposal of property, plant and equipment, net | (0.1) |  | 0 |  | (0.1) |
(Repayment)/issue of promissory note in civil complaint settlement | (5.0) |  | 15.0 |  | 0 |
Non-cash issue of treasury stock in civil complaint settlement | 0 |  | 5.0 |  | 0 |
Changes in working capital: |  |  |  |  |  |
Trade and other accounts receivable | (14.1) |  | (15.3) |  | 4.8 |
Inventories | (1.0) |  | (14.3) |  | (2.3) |
Prepaid expenses | 0.1 |  | 0 |  | (0.2) |
Accounts payable and accrued liabilities | (5.5) |  | (13.7) |  | (11.5) |
Excess tax benefit from stock based payment arrangements | (2.2) |  | (1.1) |  | 0 |
Accrued income taxes | 1.0 |  | (4.1) |  | (0.1) |
Movement on plant closure provisions | 1.8 |  | 1.1 |  | (0.8) |
Cash contributions to defined benefit pension plans | (9.4) |  | (9.5) |  | (15.6) |
Non-cash expense of defined benefit pension plans | 0.1 |  | 1.0 |  | 19.0 |
Stock option compensation | 3.1 |  | 3.1 |  | 0.8 |
Movements on unrecognized tax benefits | 0.2 |  | 4.0 |  | (10.8) |
Movements on other non-current assets and liabilities | (1.3) |  | 2.2 |  | (1.4) |
Net cash provided by operating activities | 61.3 |  | 34.7 |  | 58.2 |
Cash Flows from Investing Activities |  |  |  |  |  |
Capital expenditures | (8.8) |  | (7.0) |  | (8.8) |
Business combinations, net of cash acquired | (53.1) |  | 0 |  | 0 |
Internally developed software and other costs | (8.5) |  | (3.1) |  | 0 |
Proceeds on disposal of property, plant and equipment | 0.2 |  | 0 |  | 0.2 |
Purchase of short-term investments | (5.0) |  | (5.0) |  | (7.5) |
Sale of short-term investments | 4.9 |  | 4.4 |  | 3.3 |
Net cash (used in) investing activities | (70.3) |  | (10.7) |  | (12.8) |
Cash Flows from Financing Activities |  |  |  |  |  |
Net receipt/(repayment) of revolving credit facility | 0 |  | 13.0 |  | 6.0 |
Repayment of term loan | 0 |  | (40.0) |  | (10.0) |
Refinancing costs | 0 |  | (1.7) |  | 0 |
Excess tax benefit from stock based payment arrangements | 2.2 |  | 1.1 |  | 0 |
Dividend paid | (46.7) |  | 0 |  | 0 |
Issue of treasury stock | 1.2 |  | 0.7 |  | 0.2 |
Repurchase of common stock | (1.4) |  | (28.1) |  | (2.7) |
Net cash (used in) financing activities | (44.7) |  | (55.0) |  | (6.5) |
Effect of foreign currency exchange rate changes on cash | (0.1) |  | 0.1 |  | (0.4) |
Net change in cash and cash equivalents | (53.8) |  | (30.9) |  | 38.5 |
Cash and cash equivalents at beginning of year | 76.2 |  | 107.1 |  | 68.6 |
Cash and cash equivalents at end of year | $ 22.4 |  | $ 76.2 |  | $ 107.1 |
[1] | Amortization of deferred finance costs of $0.4 million (2011 - $0.5 million, 2010 - $1.4 million) for the year are included in depreciation and amortization in the cash flow statement but in interest expense in the income statement. Cash payments/receipts in respect of income taxes and interest are disclosed in Note 10 and Note 11, respectively.

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i -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 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + 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 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition The fair value of stock issued in noncash financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 -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. + Details
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