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Pension and Other Postretirement Benefits - Level 3 Asset Rollforward (Details) (Fair Value Inputs Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	$ 47,160	$ 45,673
Purchases	2,997	2,592
Settlements	(1,466)	(1,376)
Unrealized Gains	1,864	1,762
Translation Difference	979	(1,491)
Fair Value of Plan Assets at End of Year	51,534	47,160
Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	46,797	45,334
Purchases	2,997	2,592
Settlements	(1,466)	(1,376)
Unrealized Gains	1,854	1,738
Translation Difference	964	(1,491)
Fair Value of Plan Assets at End of Year	51,146	46,797
Real Estate Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	363	339
Purchases	0	0
Settlements	0	0
Unrealized Gains	10	24
Translation Difference	15	0
Fair Value of Plan Assets at End of Year	$ 388	$ 363

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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