Pension and Postretirement Benefits (Details Textual) (USD $)	12 Months Ended									12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Funded Plans [Member]	Dec. 31, 2011 Funded Plans [Member]	Dec. 31, 2012 Unfunded Pension Plans [Member]	Dec. 31, 2011 Unfunded Pension Plans [Member]	Dec. 31, 2012 Foreign [Member]	Dec. 31, 2011 Foreign [Member]	Dec. 31, 2012 Postretirement Benefit Plans [Member]	Dec. 31, 2019 Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated actuarial loss for postretirement benefit plans				$ (1,419,000)	$ (1,157,000)	$ (799,000)	$ (609,000)			$ 566,000
Estimated prior service credit for postretirement benefit plans										901,000,000,000
Liabilities of funded plans								2,400,000	2,100,000
Liabilities of unfunded plans	3,000,000	2,900,000
Net actuarial losses for the foreign funded plans (after tax)								3,900,000	3,400,000
Net actuarial losses for the foreign funded plans (before tax)								5,300,000	4,600,000
Net actuarial losses for the foreign unfunded plans (after tax)								271,000	199,000
Net actuarial losses for the foreign unfunded plans (before tax)								366,000	269,000
Amount expected to contribute in funded pension plans				1,700,000
Amount expected to contribute in unfunded pension plans						1,100,000
Amount expected to contribute in postretirement benefit plans										400,000
Assumed health care cost trend rate	8.50%										5.00%
Pension and Postretirement Benefits (Textual) [Abstract]
Net periodic pension cost	597,000
Decrease in assumed health care cost trend rate	0.50%
Effect of one percentage point increase on accumulated post retirement benefit obligation	1,800,000
Effect of one percentage point increase in assumed health care cost trend rate on total service and interest cost components	120,000
Effect of one percentage point decrease in assumed health care cost trend rate on accumulated post retirement benefit obligation	1,500,000
Effect of one percentage point decrease in assumed health care cost trend rate on total service and interest cost components	97,000
Maximum percentage of funding status of plans in yellow zone	80.00%
Maximum percentage of funding status of plans in green zone	80.00%
Maximum percentage of funding status of plans in red zone	65.00%
Percentage of excess employer contributions to 2010 plans	5.00%
Cost of other employee benefit plans	$ 1,700,000	$ 1,300,000	$ 1,600,000