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Pension Plans (Details Textual) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2010 USD ($) | Jun. 30, 2010 USD ($) | Mar. 31, 2010 USD ($) | Dec. 31, 2012 USD ($) Entity | Dec. 31, 2011 USD ($) | Dec. 31, 2011 GBP (£) | Dec. 31, 2010 USD ($) | Dec. 31, 2012 United Kingdom Government Gilts [Member] | Dec. 31, 2011 United Kingdom Government Gilts [Member] | Dec. 31, 2012 UK Plan [Member] | Dec. 31, 2011 UK Plan [Member] | Dec. 31, 2010 UK Plan [Member] | Dec. 31, 2012 UK Plan [Member] Equity securities [Member] | Dec. 31, 2011 UK Plan [Member] Equity securities [Member] | Dec. 31, 2010 UK Plan [Member] Equity securities [Member] | Dec. 31, 2012 UK Plan [Member] Debt securities [Member] | Dec. 31, 2011 UK Plan [Member] Debt securities [Member] | Dec. 31, 2010 UK Plan [Member] Debt securities [Member] | Dec. 31, 2012 UK Plan [Member] Index-tracking funds [Member] | Dec. 31, 2011 UK Plan [Member] Index-tracking funds [Member] | Dec. 31, 2012 UK Plan [Member] Cash [Member] | Dec. 31, 2011 UK Plan [Member] Cash [Member] | Dec. 31, 2010 UK Plan [Member] Cash [Member] | Dec. 31, 2012 German Plan [Member] USD ($)
Pension Plans (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of asset allocation as per current investment strategy |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00% | 31.00% | 29.00% | 27.00% | 63.00% | 66.00% | 73.00% |  |  | 6.00% | 5.00% | 0.00% |
Percentage of asset allocation, actual |  |  |  |  |  |  |  | 25.00% | 25.00% |  |  |  |  |  |  |  |  |  | 55.00% | 55.00% |  |  |  |
Amount of unrecognized actuarial net losses |  |  |  |  | $ 94.8 |  | $ 164.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.8
Amount of unrecognized actuarial net losses, net of tax |  |  |  |  | 35.1 |  | 64.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.8
Pension Plans (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retirement age of service |  |  |  | 65 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of investment management companies in funds holding |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash curtailment loss |  |  | 8.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduced in Projected Benefit Obligation (PBO) |  | 17.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred pensioners | 15.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining life expectancy of plan pensioners |  |  |  |  |  |  | 15 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement loss | 1.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual cash contribution |  |  |  |  | 9.0 | 5.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual cash contribution 2013 |  |  |  | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage change in discount rate |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount change in PBO due to discount rate |  |  |  | 26 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount change in net pension charge due to discount rate |  |  |  | 0.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount change in PBO due to change price inflation |  |  |  | 22.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount change in net pension charge due to change price inflation |  |  |  | 2.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in actuarial net losses due to change in inflation rate |  |  |  | 47 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash contribution plan period |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum percentage of Plan's assets invested in individual company's investment funds |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage change in price inflation |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated benefit obligation for the Plan |  |  |  | 805.3 | 687.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of contributions to defined contribution schemes |  |  |  | $ 7.4 | $ 6.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accumulated Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6503844 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph e -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 employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph g -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 Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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