Pension and Other Postretirement Benefits (Details 8) (Foreign Pension Benefits [Member]) In Thousands, unless otherwise specified	Dec. 31, 2012 USD ($)	Dec. 31, 2012 GBP (£)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 GBP (£)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2012 Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2011 Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 Equity Securities [Member] USD ($)	Dec. 31, 2011 Equity Securities [Member] USD ($)	Dec. 31, 2012 Equity Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2011 Equity Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2012 Equity Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2011 Equity Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 Equity Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2011 Equity Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 U.K [Member] Equity Securities [Member] USD ($)	Dec. 31, 2011 U.K [Member] Equity Securities [Member] USD ($)	Dec. 31, 2012 U.K [Member] Equity Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2011 U.K [Member] Equity Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2012 U.K [Member] Equity Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2011 U.K [Member] Equity Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 U.K [Member] Equity Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2011 U.K [Member] Equity Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 U.K [Member] Fixed-Income Securities [Member] USD ($)	Dec. 31, 2011 U.K [Member] Fixed-Income Securities [Member] USD ($)	Dec. 31, 2012 U.K [Member] Fixed-Income Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2011 U.K [Member] Fixed-Income Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2012 U.K [Member] Fixed-Income Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2011 U.K [Member] Fixed-Income Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 U.K [Member] Fixed-Income Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2011 U.K [Member] Fixed-Income Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 Commingled funds [Member] International [Member] Equity Securities [Member] USD ($)	Dec. 31, 2011 Commingled funds [Member] International [Member] Equity Securities [Member] USD ($)	Dec. 31, 2012 Commingled funds [Member] International [Member] Equity Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2011 Commingled funds [Member] International [Member] Equity Securities [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2012 Commingled funds [Member] International [Member] Equity Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2011 Commingled funds [Member] International [Member] Equity Securities [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 Commingled funds [Member] International [Member] Equity Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2011 Commingled funds [Member] International [Member] Equity Securities [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 Hedge and absolute return funds [Member] Alternative Investments [Member] USD ($)	Dec. 31, 2011 Hedge and absolute return funds [Member] Alternative Investments [Member] USD ($)	Dec. 31, 2012 Hedge and absolute return funds [Member] Alternative Investments [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2011 Hedge and absolute return funds [Member] Alternative Investments [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2012 Hedge and absolute return funds [Member] Alternative Investments [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2011 Hedge and absolute return funds [Member] Alternative Investments [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 Hedge and absolute return funds [Member] Alternative Investments [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2011 Hedge and absolute return funds [Member] Alternative Investments [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 Other (primarily cash and cash equivalents) [Member] USD ($)	Dec. 31, 2011 Other (primarily cash and cash equivalents) [Member] USD ($)	Dec. 31, 2012 Other (primarily cash and cash equivalents) [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2011 Other (primarily cash and cash equivalents) [Member] Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member] USD ($)	Dec. 31, 2012 Other (primarily cash and cash equivalents) [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2011 Other (primarily cash and cash equivalents) [Member] Significant Other Observable Inputs (Level 2) [Member] USD ($)	Dec. 31, 2012 Other (primarily cash and cash equivalents) [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2011 Other (primarily cash and cash equivalents) [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)
Asset categories based on the nature and risks of the plans assets
Asset categories based on the nature and risks of the plans assets	$ 41,875	£ 25,774	$ 36,436	£ 23,443	$ 34,836	$ 32,844	$ 33,112	$ 0	$ 0	$ 9,031	$ 3,324	$ 3,211	$ 18,417	$ 16,932	$ 18,417	$ 16,932	$ 0	$ 0	$ 0	$ 0	$ 3,277	$ 4,521	$ 3,277	$ 4,521	$ 0	$ 0	$ 0	$ 0	$ 14,341	$ 15,733	$ 14,341	$ 15,733	$ 0	$ 0	$ 0	$ 0	$ 15,140	$ 12,411	$ 15,140	$ 12,411	$ 0	$ 0	$ 0	$ 0	$ 9,031	$ 3,324	$ 0	$ 0	$ 0	$ 0	$ 9,031	$ 3,324	$ 86	$ 447	$ 86	$ 447	$ 0	$ 0	$ 0	$ 0

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References+ Details