Summary of Significant Accounting Policies (Details 5) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in accumulated other comprehensive income by component
Accumulated Other Comprehensive Income			$ 25,746,000
Accumulated Other Comprehensive Income	37,708,000		37,708,000
Total other comprehensive income (loss), net of tax	401,000	9,767,000	11,962,000	(32,099,000)
Amortization of actuarial losses and prior service credits to net periodic pension cost, before tax			1,000,000
Amortization of actuarial losses and prior service credits to net periodic pension cost, amount of tax			200,000
Accumulated Other Comprehensive Income
Changes in accumulated other comprehensive income by component
Accumulated Other Comprehensive Income			25,746,000
Other comprehensive income, net of tax, before reclassifications			11,198,000
Amounts reclassified from accumulated other comprehensive income, net of tax			764,000
Accumulated Other Comprehensive Income	37,708,000		37,708,000
Total other comprehensive income (loss), net of tax			11,962,000
Foreign Currency Translation Adjustments
Changes in accumulated other comprehensive income by component
Accumulated Other Comprehensive Income			67,456,000
Other comprehensive income, net of tax, before reclassifications			11,198,000
Accumulated Other Comprehensive Income	78,654,000		78,654,000
Total other comprehensive income (loss), net of tax			11,198,000
Defined Benefit Plans
Changes in accumulated other comprehensive income by component
Accumulated Other Comprehensive Income			(41,710,000)
Amounts reclassified from accumulated other comprehensive income, net of tax			764,000
Accumulated Other Comprehensive Income	(40,946,000)		(40,946,000)
Total other comprehensive income (loss), net of tax			$ 764,000