Retirement Benefit Plans (Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	$ 2,181	$ 8,896	$ (11,503)
Amortization of actuarial loss	(1,059)	(837)	(1,822)
Prior-service credit	147	360	(1,331)
Amortization of prior service (cost) credit	(50)	(32)	47
Curtailment gain/Settlements	0	0	1,701
Total recognized in other comprehensive (income) loss	1,219	8,387	(12,908)
Non-U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	(128)	(94)	(735)
Amortization of actuarial loss	(146)	(112)	(121)
Curtailment gain/Settlements	(37)	0	0
Total recognized in other comprehensive (income) loss	(311)	(206)	(856)
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	226	613	16
Amortization of actuarial loss	(91)	(66)	(52)
Amortization of prior service (cost) credit	107	107	107
Total recognized in other comprehensive (income) loss	$ 242	$ 654	$ 71