Pension and Other Postretirement Benefit Plans (Net periodic pension cost (income) and other amounts recognized in other comprehensive income (loss) before taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of net periodic pension cost (income):
Net periodic pension cost (income)	$ 437	$ (109)	$ (209)
Foreign Plan [Member]
Components of net periodic pension cost (income):
Service cost	671	793	629
Interest cost	651	717	614
Expected return on plan assets	(1,403)	(1,616)	(1,491)
Prior service cost amortization	44	46	39
Deferred loss amortization	216	309	0
Settlement cost	258	0	0
Net periodic pension cost (income)	437	249	(209)
Other amounts recognized in other comprehensive income (loss) before income taxes are as follows:
Prior service cost amortization	(44)	(46)	(39)
Loss (gain) on value of plan assets	(1,268)	(965)	1,592
Actuarial loss on benefit obligation	1,659	735	2,068
Settlement	(258)	0	0
Deferred loss amortization	(216)	(309)	0
Total recognized in other comprehensive income (loss), before taxes	(127)	(585)	3,621
Total recognized in net periodic pension cost (income) and other comprehensive income (loss), before taxes	$ 310	$ (336)	$ 3,412