Pensions and Other Post-retirement Benefits (Details Textual) (USD $)	0 Months Ended		6 Months Ended	12 Months Ended
	Dec. 31, 2012	Jun. 29, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Pension and other post-retirement benefits (Textual) [Abstract]
Expected rate of return assumption				7.50%	7.75%	8.00%	8.25%
Expected long-term rate of return, minimum
Domestic expected long-term rate of return assumption				7.50%
Domestic rate of compensation increase assumption changed from a flat								4.50%
Increase graded assumption for the domestic rate of compensation	4.50%		4.00%	4.50%	4.00%	3.00%	2.00%
Maturity Of Debt Securities					five years or less
Mutual fund that typically invests at least of its assets in equity and debt securities					80.00%
Percentage of withdrawals from the multi-strategy hedge fund partnerships			up to 25%
Period of written notice for withdrawals from multi-strategy hedge fund partnerships					at least thirty days
Percentage of withdrawals from the multi-strategy hedge fund partnerships	25.00%	25.00%
Percentage of other withdrawals					excess of 25%
Excess percentage of withdrawals				25.00%
Period of written notice for other withdrawals					at least three months
Percentage of withdrawals for all other partnerships					up to 100%
Percentage of withdrawals of the capital accounts				100.00%
Target Funded Status Percentage					100.00%
Current asset allocation to invest in alternative securities, maximum				20.00%
Domestic defined benefit pension plan	$ 13,000,000			$ 13,000,000
Other defined benefit plan estimated future employer contributions in next fiscal year	2,300,000			2,300,000
Liability for other post-employment arrangements	125,978,000		105,115,000	125,978,000	105,115,000
Company's annual contributions				2,500,000	2,200,000	1,300,000
England Pension Plan Defined Benefit [Member]
Pension and other post-retirement benefits (Textual) [Abstract]
Defined Benefit Plan, Percent of Company Aggregated Total Fair Value of Plan Assets	4.00%			4.00%
Foreign Pension Plans Defined Benefit [Member]
Pension and other post-retirement benefits (Textual) [Abstract]
Liability for other post-employment arrangements	$ 2,600,000		$ 3,200,000	$ 2,600,000	$ 3,200,000
Maximum [Member]
Pension and other post-retirement benefits (Textual) [Abstract]
Maturity of foreign debt securities				5 years
Minimum [Member]
Pension and other post-retirement benefits (Textual) [Abstract]
Period Of written notice for plan withdrawals from multi-strategy hedge fund partnerships				30 days
Period of written notice for other withdrawals				3 months
Equity Securities [Member]
Pension and other post-retirement benefits (Textual) [Abstract]
Current asset allocation to invest in equity securities, Minimum				30.00%
Current asset allocation to invest in equity securities, Maximum				70.00%
Fixed Income Funds [Member]
Pension and other post-retirement benefits (Textual) [Abstract]
Current asset allocation to invest in equity securities, Minimum				20.00%
Current asset allocation to invest in equity securities, Maximum				50.00%