Retirement Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
U.S. Pension and Postretirement Health Care
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 18	$ 20	$ 53	$ 58
Interest cost	691	698	2,180	2,164
Expected return on plan assets	(1,143)	(1,100)	(3,551)	(3,403)
Amortization of actuarial loss	256	365	690	1,617
Amortization of prior service credit	(18)	(33)	(54)	(133)
Curtailment	0	(1,701)	0	(1,701)
Total	(196)	(1,751)	(682)	(1,398)
Non-U.S. Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	50	48	149	149
Expected return on plan assets	(75)	(72)	(224)	(215)
Amortization of actuarial loss	17	31	52	92
Total	$ (8)	$ 7	$ (23)	$ 26