Pension and Postretirement Benefits (Details Textual) (USD $)	12 Months Ended							12 Months Ended							12 Months Ended
	Dec. 31, 2013 PensionFunds	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Funded Plans	Dec. 31, 2012 Funded Plans	Dec. 31, 2013 Unfunded Pension Plans	Dec. 31, 2012 Unfunded Pension Plans	Dec. 31, 2013 Foreign Pension Plans	Dec. 31, 2012 Foreign Pension Plans	Dec. 31, 2011 Foreign Pension Plans	Dec. 31, 2013 Foreign Pension Plans Funded Plans	Dec. 31, 2012 Foreign Pension Plans Funded Plans	Dec. 31, 2013 Foreign Pension Plans Unfunded Pension Plans	Dec. 31, 2012 Foreign Pension Plans Unfunded Pension Plans	Dec. 31, 2013 Postretirement Benefit Plans	Dec. 31, 2019 Scenario Forecast
Defined Benefit Plan Disclosure [Line Items]
Estimated net actuarial loss for pension plans that is expected to be amortized	$ 416,000							$ (248,000)	$ (201,000)	$ (73,000)					$ 405,000
Estimated prior service credit for postretirement benefit plans															592,000
Funded status				(2,563,000)	(4,724,000)	(10,536,000)	(11,570,000)				100,000	(2,390,000)	(2,911,000)	(3,032,000)
Liabilities of funded plans												2,400,000
Liabilities of unfunded plans													2,900,000	3,000,000
Net actuarial losses for the foreign funded plans (before tax)								3,800,000	5,300,000
Net actuarial losses for the foreign funded plans (after tax)								2,800,000	3,900,000
Net actuarial losses for the foreign unfunded plans (before tax)								367,000	366,000
Net actuarial losses for the foreign unfunded plans (after tax)								275,000	271,000
Amount expected to contribute in funded pension plans				1,400,000
Amount expected to contribute in unfunded pension plans						942,000
Amount expected to contribute in postretirement benefit plans															950,000
Assumed health care cost trend rate	8.00%	8.50%														5.00%
Decrease in assumed health care cost trend rate	0.50%	0.50%
Effect of one percentage point increase on accumulated post retirement benefit obligation	1,500,000
Effect of one percentage point increase in assumed health care cost trend rate on total service and interest cost components	113,000
Effect of one percentage point decrease in assumed health care cost trend rate on accumulated post retirement benefit obligation	1,300,000
Effect of one percentage point decrease in assumed health care cost trend rate on total service and interest cost components	90,000
Maximum percentage of funding status of plans in red zone	65.00%
Maximum percentage of funding status of plans in yellow zone	80.00%
Maximum percentage of funding status of plans in green zone	80.00%
Percentage of excess employer contributions	5.00%
Aggregate number of funds	37
Cost of other employee benefit plans	$ 1,300,000	$ 1,700,000	$ 1,300,000