Pensions (Fair Values Of Pension Plans By Asset Categories US Plans) (Details) (USD $) In Thousands, unless otherwise specified																						12 Months Ended				12 Months Ended				12 Months Ended																																																																																																										12 Months Ended
	Dec. 31, 2011 U.S. Plans [Member]	Dec. 31, 2010 U.S. Plans [Member]	Dec. 31, 2009 U.S. Plans [Member]	Dec. 31, 2011 U.S. Plans [Member] Cash Equivalents [Member]	Dec. 31, 2010 U.S. Plans [Member] Cash Equivalents [Member]	Dec. 31, 2011 U.S. Plans [Member] All Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Mid Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Small Cap Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Small Cap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Microcap Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Microcap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] International Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] International Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Long Duration Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]	Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]	Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Cash Equivalents [Member]	Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Cash Equivalents [Member]	Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] All Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Mid Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Small Cap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Microcap Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Microcap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] International Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] International Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Long Duration Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member]	Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member]	Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Cash Equivalents [Member]	Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Cash Equivalents [Member]	Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] All Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Mid Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Small Cap Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Small Cap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Microcap Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Microcap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] International Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] International Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Long Duration Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Observable Inputs (Level 2) [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Cash Equivalents [Member]	Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Cash Equivalents [Member]	Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] All Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Large Cap [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Mid Cap [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Small Cap Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Small Cap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Microcap Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Microcap Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] International Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] International Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Core Fixed Fund Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Long Duration Mutual Fund [Member]		Dec. 31, 2011 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2010 U.S. Plans [Member] Significant Unobservable Inputs (Level 3) [Member] Emerging Markets Debt Mutual Fund [Member]		Dec. 31, 2011 Minimum [Member] U.S. Plans [Member] International Mutual Fund [Member]	Dec. 31, 2011 Minimum [Member] U.S. Plans [Member] Core Fixed Fund Mutual Fund [Member]	Dec. 31, 2011 Maximum [Member] U.S. Plans [Member] International Mutual Fund [Member]	Dec. 31, 2011 Maximum [Member] U.S. Plans [Member] Core Fixed Fund Mutual Fund [Member]	Dec. 31, 2011 UK Equity Index Fund [Member] Global Equity 60-40 Index [Member]	Dec. 31, 2011 Overseas Index Funds [Member] Global Equity 60-40 Index [Member]	Dec. 31, 2011 North American Funds [Member] Global Equity 60-40 Index [Member]	Dec. 31, 2011 European Funds (Not Including UK) [Member] Global Equity 60-40 Index [Member]	Dec. 31, 2011 Japanese Funds [Member] Global Equity 60-40 Index [Member]	Dec. 31, 2011 Pacific Basin Funds (Not Including Japan) [Member] Global Equity 60-40 Index [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	$ 82,970	$ 83,539	$ 65,708	$ 2,311	$ 1,011	$ 9,060	[1]	$ 19,748	[2]	$ 21,115	[2]	$ 9,308	[3]	$ 5,491	[4]	$ 5,618	[4]	$ 5,181	[5]	$ 5,012	[5]	$ 13,795	[6]	$ 14,587	[6]	$ 15,418	[7]	$ 23,743	[7]	$ 7,679	[8]	$ 4,287	[9]	$ 3,145	[9]	$ 77,479	$ 77,921	$ 2,311	$ 1,011	$ 9,060	[1]	$ 19,748	[2]	$ 21,115	[2]	$ 9,308	[3]		[4]	$ 5,181	[5]	$ 5,012	[5]	$ 13,795	[6]	$ 14,587	[6]	$ 15,418	[7]	$ 23,743	[7]	$ 7,679	[8]	$ 4,287	[9]	$ 3,145	[9]	$ 5,491	$ 5,618				[1]		[2]		[2]		[3]	$ 5,491	[4]	$ 5,618	[4]		[5]		[5]		[6]		[6]		[7]		[7]		[8]		[9]		[9]						[1]		[2]		[2]		[3]		[4]		[4]		[5]		[5]		[6]		[6]		[7]		[7]		[8]		[9]		[9]
Percentage of combined exposure to emerging markets																																																																																																																																								10.00%		20.00%
Maximum exposure percentage restricted to emerging markets																						40.00%
Maximum percentage of assets invested in grade securities																														10.00%
Maximum percentage of asset invested in non-dollar denominated bonds																										10.00%				30.00%
Minimum percentage of asset invested in bonds																										80.00%
Average portfolio duration percentage																																																																																																																																									(20.00%)		20.00%
Investment allocation percentage in funds																																																																																																																																												60.00%	40.00%	14.00%	14.00%	6.00%	6.00%

[1] This category invests in the common stock of primarily U.S. companies across the capitalization spectrum (Large, Mid, and Small Cap) that are undervalued relative to their intrinsic value. The strategy is benchmarked to the Russell 3000 Value Index.

[2] This category consists of Growth and Value strategies investing primarily in the common stock of large capitalization companies located in the United States. Growth oriented strategies seek companies within the Russell 1000 Growth Universe with above average earnings, growth, and revenue expectations. Value oriented strategies seek companies within the Russell 1000 Value Universe that are undervalued relative to their intrinsic value. These strategies are benchmarked to the Russell 1000 Growth and Value Indices respectively.

[3] This category invests primarily in small to mid-sized U.S. companies that are undervalued relative to their intrinsic value. The smaller cap orientation of the strategy requires investment manager to be cognizant of liquidity and capital restraints, which are monitored by the investment team on an ongoing basis. This strategy is benchmarked to the Russell Midcap Value Index.

[4] This category invests primarily in small capitalization U.S. companies that are either undervalued relative to their intrinsic value or that have above average earnings growth and revenue expectations. The smaller cap orientation of the strategy requires investment manager to be cognizant of liquidity and capital restraints, which are monitored by the investment team on an ongoing basis. This strategy is benchmarked to the Russell 2000 Index.

[5] This category invests primarily in micro-capitalization U.S. companies that are undervalued relative to their intrinsic value. The smaller cap orientation of the strategy requires the investment managers to be cognizant of liquidity and capital restraints, which are monitored by the investment team on an ongoing basis. This strategy is benchmarked to the Russell Micro Cap Value Index.

[6] This category invests in all types of capitalization companies operating in both developed and emerging markets outside the United States. The strategy targets broad diversification across various economic sectors and seeks to achieve lower overall portfolio volatility by investing with complimentary active managers with varying risk characteristics. Total combined exposure to emerging markets typically ranges from 10% to 20%, with a maximum restriction of 40%. This category is benchmarked to the MSCI EAFE Index and the MSCI All Country World Index ex U.S.

[7] This category invests primarily in U.S. denominated investment grade and government securities in addition to MBS and ABS issues. It may invest up to 10% of its assets in non-dollar denominated bonds from issuers located outside of the United States. Investment in non-dollar denominated bonds may be on a currency hedged or un-hedged basis. This category normally invests at least 80% of its assets in bonds and maintains an average portfolio duration that is within ±20% of the duration of the benchmark. This category is benchmarked to the Barclays Capital Aggregate Index.

[8] This category invests in a diversified portfolio of longer duration bonds. The fund typically invests primarily in U.S. investment grade securities, but does have the ability to invest up to 10% in high yield (minimum credit rating of B), and up to 30% in non-U.S. denominated securities. The portfolio has an average duration that normally varies within two years (plus or minus) of the benchmark. This category is benchmarked to the Barclays Capital Long-Term Government/Credit Index.

[9] This category invests primarily in local currency denominated government debt securities of countries within the Emerging Markets. The strategy is broadly diversified by country and will invest in locally denominated corporate securities. This strategy is benchmarked to the JP Morgan GBI-EM Global Diversified Index.