Pension And Other Postretirement Benefit Plans (Summarized Pension Assets In Accordance With Fair Value Measurement Provisions) (Details) (USD $)	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	$ 2,080,000		$ 3,269,000		$ 4,173,000
U.S. Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents, Fair value	2,053,000	[1]	861,000	[1]
Total investments, Fair Value	142,900,000		134,792,000
Net payable for investments purchased, Fair Value
Other receivables, net Fair Value			15,000
Total pension assets, Fair Value	142,900,000		134,807,000
U.S. Pension Assets [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	216,000.000		15,028,000
Total pension assets, Fair Value	216,000.000		15,028,000
U.S. Pension Assets [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents, Fair value	2,053,000	[1]	861,000	[1]
Total investments, Fair Value	140,604,000		116,510,000
Net payable for investments purchased, Fair Value
Other receivables, net Fair Value
Total pension assets, Fair Value	140,604,000		116,510,000
U.S. Pension Assets [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents, Fair value				[1]
Total investments, Fair Value	2,080,000		3,254,000
Net payable for investments purchased, Fair Value
Other receivables, net Fair Value			15,000
Total pension assets, Fair Value	2,080,000		3,269,000
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Passive U.S Large Cap Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value			45,307,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Passive U.S Large Cap Equity [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value			45,307,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Passive U.S Large Cap Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value				[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S Large Cap Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	54,180,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S Large Cap Equity [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	54,180,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S. Small/Mid Cap Growth Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	6,593,000	[2]	7,849,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S. Small/Mid Cap Growth Equity [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	6,593,000	[2]	7,849,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S. Small/Mid Cap Growth Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value				[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S. Small/Mid Cap Value Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	6,843,000	[2]	7,648,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S. Small/Mid Cap Value Equity [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	6,843,000	[2]	7,648,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S. Small/Mid Cap Value Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value				[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Non-U.S Core Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	15,649,000	[2]	19,209,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Non-U.S Core Equity [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	15,649,000	[2]	19,209,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Non-U.S Core Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value				[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Passive U.S. Core Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value			35,636,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Passive U.S. Core Fixed Income [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value			35,636,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | Passive U.S. Core Fixed Income [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value				[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	55,286,000	[2]
U.S. Pension Assets [Member] | Common Collective Trust Units [Member] | U.S Fixed Income [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	55,286,000	[2]
U.S. Pension Assets [Member] | Limited Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	1,032,000	[3]	1,012,000	[3]
U.S. Pension Assets [Member] | Limited Partnerships [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value				[3]
U.S. Pension Assets [Member] | Limited Partnerships [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	1,032,000	[3]	1,012,000	[3]
U.S. Pension Assets [Member] | Private Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	1,048,000	[4]	2,242,000	[4]
U.S. Pension Assets [Member] | Private Equity Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value				[4]
U.S. Pension Assets [Member] | Private Equity Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	1,048,000	[4]	2,242,000	[4]
U.S. Pension Assets [Member] | U.S Corporate Stock Large Cap Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value			14,630,000
U.S. Pension Assets [Member] | U.S Corporate Stock Large Cap Mutual Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value			14,630,000
U.S. Pension Assets [Member] | U.S Corporate Stock Large Cap Mutual Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value
U.S. Pension Assets [Member] | U.S Corporate Stock Large Cap Mutual Fund [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value
U.S. Pension Assets [Member] | U.S Mid Cap Corporate Stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	216,000		398,000
U.S. Pension Assets [Member] | U.S Mid Cap Corporate Stocks [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value	216,000.000		398,000
U.S. Pension Assets [Member] | U.S Mid Cap Corporate Stocks [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value
U.S. Pension Assets [Member] | U.S Mid Cap Corporate Stocks [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments, Fair Value
Non-U.S. Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents, Fair value	224,000		421,000
Total pension assets, Fair Value	42,354,000		41,380,000
Non-U.S. Pension Assets [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents, Fair value	224,000		421,000
Total pension assets, Fair Value	40,157,000		421,000
Non-U.S. Pension Assets [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents, Fair value
Total pension assets, Fair Value	2,197,000		40,959,000
Non-U.S. Pension Assets [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents, Fair value
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | Corporate Debt Pooled Unit Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value			18,042,000	[5]
Non-U.S. Pension Assets [Member] | Corporate Debt Pooled Unit Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value				[5]
Non-U.S. Pension Assets [Member] | Corporate Debt Pooled Unit Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value			18,042,000	[5]
Non-U.S. Pension Assets [Member] | Corporate Debt Pooled Unit Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value				[5]
Non-U.S. Pension Assets [Member] | UK Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	6,365,000
Non-U.S. Pension Assets [Member] | UK Equity [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	6,365,000
Non-U.S. Pension Assets [Member] | UK Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | Emerging Markets Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	5,507,000
Non-U.S. Pension Assets [Member] | Emerging Markets Equity [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	5,507,000
Non-U.S. Pension Assets [Member] | Emerging Markets Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | US Blended Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	3,814,000
Non-U.S. Pension Assets [Member] | US Blended Equity [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	3,814,000
Non-U.S. Pension Assets [Member] | US Blended Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | European Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	2,373,000
Non-U.S. Pension Assets [Member] | European Equity [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	2,373,000
Non-U.S. Pension Assets [Member] | European Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | Asia Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	1,744,000
Non-U.S. Pension Assets [Member] | Asia Equity [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	1,744,000
Non-U.S. Pension Assets [Member] | Asia Equity [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | UK Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	11,090,000
Non-U.S. Pension Assets [Member] | UK Corporate Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	11,090,000
Non-U.S. Pension Assets [Member] | UK Corporate Bonds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | UK Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	6,079,000
Non-U.S. Pension Assets [Member] | UK Government Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	6,079,000
Non-U.S. Pension Assets [Member] | UK Government Bonds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | Emerging Markets Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	1,973,000
Non-U.S. Pension Assets [Member] | Emerging Markets Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	1,973,000
Non-U.S. Pension Assets [Member] | Emerging Markets Bonds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | Global Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	988,000
Non-U.S. Pension Assets [Member] | Global Government Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	988,000
Non-U.S. Pension Assets [Member] | Global Government Bonds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | Global Corporate Stock Pooled Unit Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value			21,478,000	[6]
Non-U.S. Pension Assets [Member] | Global Corporate Stock Pooled Unit Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value				[6]
Non-U.S. Pension Assets [Member] | Global Corporate Stock Pooled Unit Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value			21,478,000	[6]
Non-U.S. Pension Assets [Member] | Global Corporate Stock Pooled Unit Funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value				[6]
Non-U.S. Pension Assets [Member] | Insurance And Reinsurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	2,197,000		1,439,000
Non-U.S. Pension Assets [Member] | Insurance And Reinsurance Contracts [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value
Non-U.S. Pension Assets [Member] | Insurance And Reinsurance Contracts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value	2,197,000		1,439,000
Non-U.S. Pension Assets [Member] | Insurance And Reinsurance Contracts [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension assets, Fair Value

[1] Cash and cash equivalents include cash in a money market fund managed by the Plan's trustee.

[2] Common collective trusts managed under a Group Trust structure.

[3] Limited partnerships include a partnership invested in distressed debt and equity issued by companies in the U.S. and a partnership invested in real estate.

[4] The private equity fund is invested in distressed debt and equity issued by companies in the U.S.

[5] Corporate debt pooled unit fund includes units held in unit-linked pooled policies structured under U.K. securities and pension regulations. The policy managers invested in investment grade corporate debt securities issued in developed markets for the benefit of the policy.

[6] Global corporate stock pooled unit fund includes units held in unit-linked pooled policies structured under U.K. securities and pension regulations. The policy managers invested in corporate stocks issued in markets in the U.S., U.K., European continent, Japan and other Asian countries.