Retirement Benefit Plans (Net Periodic Pension Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost			$ 2,754	$ 2,766	$ 3,056
Expected return on plan assets			(4,689)	(4,513)	(4,344)
Amortization of actuarial loss			837	1,822	2,772
Amortization of prior service credit			32	(47)	(100)
Curtailment gain	(1,700)	(1,700)	0	(1,701)	0
Net periodic pension benefit expense (income)			(1,066)	(1,673)	1,384
Non-U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost			196	197	208
Expected return on plan assets			(296)	(282)	(287)
Amortization of actuarial loss			112	121	131
Net periodic pension benefit expense (income)			12	36	52
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost			70	77	79
Interest cost			118	98	120
Amortization of actuarial loss			66	52	40
Amortization of prior service credit			(107)	(107)	(156)
Net periodic pension benefit expense (income)			$ 147	$ 120	$ 83