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, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of net periodic pension cost:
Net periodic pension cost	$ 319	$ 20	$ 437
Foreign Plan [Member]
Components of net periodic pension cost:
Service cost	846	831	671
Interest cost	697	504	651
Expected return on plan assets	(1,784)	(1,539)	(1,403)
Prior service cost amortization	140	44	44
Deferred loss amortization	0	180	216
Settlement cost	420	0	258
Net periodic pension cost	319	20	437
Other amounts recognized in other comprehensive income (loss) before income taxes are as follows:
Prior service cost amortization	(140)	(44)	(44)
Gain on value of plan assets	(1,695)	(2,977)	(1,268)
Actuarial (gain) loss on benefit obligation	4,975	(405)	1,659
Actuarial (gain) loss on benefit obligation	0	978	0
Settlement	(420)	0	(258)
Deferred loss amortization	0	(180)	(216)
Total recognized in other comprehensive income (loss), before taxes	2,720	(2,628)	(127)
Total recognized in net periodic pension cost and other comprehensive income (loss), before taxes	$ 3,039	$ (2,608)	$ 310