Pension and Post-Retirement Benefit Costs (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
United States Pension Plan of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 83	$ 29	$ 250
Interest cost	487	576	1,519	1,747
Expected return on plan assets	(712)	(777)	(2,237)	(2,363)
Amortization of prior service cost	0	74	0	223
Amortization of net loss	333	71	942	204
Net periodic benefit cost	108	27	253	61
Foreign Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	416	248	1,248	248
Interest cost	528	562	1,585	562
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of net loss	263	0	789	0
Net periodic benefit cost	1,207	810	3,622	810
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	6	17	16
Interest cost	149	185	448	548
Amortization of prior service cost	0	13	0	38
Amortization of net loss	96	82	288	220
Net periodic benefit cost	$ 251	$ 286	$ 753	$ 822