Pensions (Details 2) (USD $) In Thousands, unless otherwise specified																																								12 Months Ended					12 Months Ended								12 Months Ended					12 Months Ended																								12 Months Ended					12 Months Ended																	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2013 Emerging Markets item	Dec. 31, 2013 U.S. Plans	Dec. 31, 2012 U.S. Plans	Dec. 31, 2011 U.S. Plans	Dec. 31, 2013 U.S. Plans Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 U.S. Plans Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Significant Observable Inputs (Level 2)	Dec. 31, 2012 U.S. Plans Significant Observable Inputs (Level 2)	Dec. 31, 2013 U.S. Plans Cash and Cash Equivalents	Dec. 31, 2012 U.S. Plans Cash and Cash Equivalents	Dec. 31, 2013 U.S. Plans Cash and Cash Equivalents Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 U.S. Plans Cash and Cash Equivalents Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Cash and Cash Equivalents Significant Observable Inputs (Level 2)	Dec. 31, 2012 U.S. Plans All Cap equities	Dec. 31, 2012 U.S. Plans All Cap equities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Equity Securities	Dec. 31, 2013 U.S. Plans Large Cap equities	Dec. 31, 2012 U.S. Plans Large Cap equities	Dec. 31, 2013 U.S. Plans Large Cap equities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 U.S. Plans Large Cap equities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Small/Mid Cap equity securities	Dec. 31, 2013 U.S. Plans Small/Mid Cap equity securities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Equities Blend	Dec. 31, 2013 U.S. Plans Equities Blend Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans International Equity	Dec. 31, 2013 U.S. Plans International Equity Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Emerging Markets	Dec. 31, 2013 U.S. Plans Emerging Markets Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 U.S. Plans Small Cap Mutual Fund equities	Dec. 31, 2012 U.S. Plans Small Cap Mutual Fund equities Significant Observable Inputs (Level 2)	Dec. 31, 2012 U.S. Plans Microcap Mutual Fund equities	Dec. 31, 2012 U.S. Plans Microcap Mutual Fund equities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 U.S. Plans International Mutual Fund equities	Dec. 31, 2012 U.S. Plans International Mutual Fund equities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Fixed Income Securities	Dec. 31, 2013 U.S. Plans Corporate Bonds	Dec. 31, 2013 U.S. Plans Corporate Bonds Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Corporate Bonds Significant Observable Inputs (Level 2)	Dec. 31, 2013 U.S. Plans Government Bonds	Dec. 31, 2013 U.S. Plans Government Bonds Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Government Bonds Significant Observable Inputs (Level 2)	Dec. 31, 2013 U.S. Plans Mortgage/Asset Backed	Dec. 31, 2013 U.S. Plans Mortgage/Asset Backed Significant Observable Inputs (Level 2)	Dec. 31, 2012 U.S. Plans Long Duration Mutual Fund	Dec. 31, 2012 U.S. Plans Long Duration Mutual Fund Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 U.S. Plans Emerging Markets Debt Mutual Fund	Dec. 31, 2012 U.S. Plans Emerging Markets Debt Mutual Fund Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Commodities	Dec. 31, 2013 U.S. Plans Commodities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Real Estate item	Dec. 31, 2013 U.S. Plans Real Estate Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 U.S. Plans Real estate equity securities Minimum	Dec. 31, 2013 U.S. Plans Foreign real estate securities Minimum	Dec. 31, 2012 U.S. Plans International Mutual Fund equities, emerging markets	Dec. 31, 2012 U.S. Plans International Mutual Fund equities, emerging markets Minimum	Dec. 31, 2012 U.S. Plans International Mutual Fund equities, emerging markets Maximum	Dec. 31, 2012 U.S. Plans High yield debt securities (minimum B credit rating) Maximum	Dec. 31, 2012 U.S. Plans Non-U.S. denominated debt securities Maximum	Dec. 31, 2013 U.S. Plans Other Investments	Dec. 31, 2013 European Plans	Dec. 31, 2012 European Plans	Dec. 31, 2011 European Plans	Dec. 31, 2013 European Plans Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 European Plans Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 European Plans Significant Unobservable Inputs (Level 3)	Dec. 31, 2012 European Plans Significant Unobservable Inputs (Level 3)	Dec. 31, 2013 European Plans Cash and Cash Equivalents	Dec. 31, 2012 European Plans Cash and Cash Equivalents	Dec. 31, 2013 European Plans Cash and Cash Equivalents Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 European Plans Cash and Cash Equivalents Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 European Plans Equity Securities	Dec. 31, 2013 European Plans M&G PP Discretionary Fund	Dec. 31, 2012 European Plans M&G PP Discretionary Fund	Dec. 31, 2013 European Plans M&G PP Discretionary Fund Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 European Plans M&G PP Discretionary Fund Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 European Plans Global Equity 60-40 Index equities	Dec. 31, 2012 European Plans Global Equity 60-40 Index equities	Dec. 31, 2013 European Plans Global Equity 60-40 Index equities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 European Plans Global Equity 60-40 Index equities Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 European Plans Fixed Income Securities	Dec. 31, 2013 European Plans Delta Lloyd Fixed Income	Dec. 31, 2012 European Plans Delta Lloyd Fixed Income	Dec. 31, 2011 European Plans Delta Lloyd Fixed Income	Dec. 31, 2013 European Plans Delta Lloyd Fixed Income Significant Unobservable Inputs (Level 3)	Dec. 31, 2012 European Plans Delta Lloyd Fixed Income Significant Unobservable Inputs (Level 3)	Dec. 31, 2013 European Plans Corporate Bonds	Dec. 31, 2012 European Plans Corporate Bonds	Dec. 31, 2013 European Plans Corporate Bonds Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 European Plans Corporate Bonds Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 European Plans Government Bonds	Dec. 31, 2012 European Plans Government Bonds	Dec. 31, 2013 European Plans Government Bonds Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 European Plans Government Bonds Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 European Plans Real Estate	Dec. 31, 2012 European Plans Real Estate	Dec. 31, 2013 European Plans Real Estate Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2012 European Plans Real Estate Quoted Prices In Active Markets For Identical Assets (Level 1)	Dec. 31, 2013 European Plans Insurance Reserves	Dec. 31, 2012 European Plans Insurance Reserves	Dec. 31, 2011 European Plans Insurance Reserves	Dec. 31, 2013 European Plans Insurance Reserves Significant Unobservable Inputs (Level 3)	Dec. 31, 2012 European Plans Insurance Reserves Significant Unobservable Inputs (Level 3)	Dec. 31, 2013 European Plans UK Equity Index Fund	Dec. 31, 2013 European Plans Overseas index equity funds	Dec. 31, 2013 European Plans North American equity funds	Dec. 31, 2013 European Plans European equity funds	Dec. 31, 2013 European Plans Japanese equity funds	Dec. 31, 2013 European Plans Pacific Basin equity funds	Dec. 31, 2013 European Plans Other Investments
Pensions
Fair value of plan assets			$ 99,784	$ 88,184	$ 82,970	$ 84,064	$ 81,932	$ 15,720	$ 6,252	$ 2,010	$ 1,585	$ 174	$ 1,585	$ 1,836	$ 9,126	$ 9,126		$ 21,139	$ 20,820	$ 21,139	$ 20,820	$ 13,446	$ 13,446	$ 715	$ 715	$ 9,532	$ 9,532	$ 6,402	$ 6,402	$ 6,252	$ 6,252	$ 5,852	$ 5,852	$ 15,884	$ 15,884		$ 23,563	$ 16,489	$ 7,074	$ 11,490	$ 10,820	$ 670	$ 6,140	$ 6,140	$ 24,370	$ 24,370	$ 4,295	$ 4,295	$ 3,383	$ 3,383	$ 1,964	$ 1,964									$ 29,586	$ 28,177	$ 24,414	$ 23,904	$ 22,653	$ 5,682	$ 5,524	$ 542	$ 993	$ 542	$ 993		$ 4,498	$ 2,103	$ 4,498	$ 2,103	$ 5,667	$ 4,604	$ 5,667	$ 4,604		$ 4,207	$ 4,058	$ 4,514	$ 4,207	$ 4,058	$ 4,779	$ 10,067	$ 4,779	$ 10,067	$ 6,384	$ 3,061	$ 6,384	$ 3,061	$ 2,034	$ 1,825	$ 2,034	$ 1,825	$ 1,475	$ 1,466	$ 1,246	$ 1,475	$ 1,466
Number of major MSCI indices	21
Number of emerging economies		21
Period of investment																																								2 years					2 years																																					6 years					15 years
Total combined investment allocation (as a percent)																	52.00%																			43.00%																				10.00%	20.00%			5.00%												34.00%									52.00%																													14.00%
Number of countries in which fund invests																																																			3
Investment allocation maximum (as a percent)																																																							40.00%
Investment in securities (as a percent)																																																					80.00%	40.00%				10.00%	30.00%																																													60.00%	40.00%	14.00%	14.00%	7.00%	5.00%