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Pension, Postretirement and Postemployment Benefits (Details 1) (Pension Benefits [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	$ 16,352	$ 15,219	$ 14,058
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	396
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	9,166
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	6,790
Short-term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	15,956
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 1 [Member] \| Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 1 [Member] \| Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 1 [Member] \| Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 1 [Member] \| Short-term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	16,352
Level 2 [Member] \| Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	396
Level 2 [Member] \| Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	9,166
Level 2 [Member] \| Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	6,790
Level 2 [Member] \| Short-term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	15,956
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 3 [Member] \| Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 3 [Member] \| Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 3 [Member] \| Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	0
Level 3 [Member] \| Short-term Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan assets	$ 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.

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