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Retirement Plans (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 plan | Dec. 31, 2011 | Dec. 31, 2010
Defined contribution plans |  |  |
Number of defined contribution retirement plans | 6 |  |
Cost of defined contribution plans | $ 7.7 | $ 6.7 | $ 6.3
Contributions to pension funds | $ 2.1 | $ 1.8 | $ 1.7
Defined contribution plan - U.S Plans |  |  |
Defined contribution plans |  |  |
Number of defined contribution retirement plans | 2 |  |
Defined contribution plan - European and Canadian Plans |  |  |
Defined contribution plans |  |  |
Number of defined contribution retirement plans | 4 |  |
Defined contribution plan - European and Canadian Plans | Minimum |  |  |
Defined contribution plans |  |  |
Entity's contribution to retirement plans as percentage of employees' compensation | 3.00% |  |
Defined contribution plan - European and Canadian Plans | Maximum |  |  |
Defined contribution plans |  |  |
Entity's contribution to retirement plans as percentage of employees' compensation | 15.00% |  |

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- Definition Represents the employer contribution as a percentage of participating employee's compensation. + References No definition available. + Details
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- Details
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- Definition Represents the number of defined contribution retirement plans. + References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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- 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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