Pension and Post-Retirement Benefit Costs (Components of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
United States Pension Plan of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 28	$ 84
Interest cost	544	595
Expected return on plan assets	(819)	(809)
Amortization of prior service cost	0	74
Amortization of net loss	290	63
Net periodic benefit cost	(43)	(7)
Foreign Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	422
Interest cost	535
Expected return on plan assets	0
Amortization of prior service cost	0
Amortization of net loss	266
Net periodic benefit cost	(1,223)
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	5
Interest cost	149	181
Amortization of prior service cost	0	13
Amortization of net loss	96	69
Net periodic benefit cost	$ (251)	$ (268)