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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-SubTopic 30

-Glossary Gain or Loss

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Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

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The amount of the cost recognized during the period for defined contribution plans.

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Retirement Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
Retirement Benefit Plans (Narrative) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Defined contribution plan, total costs	$ 7,600,000	$ 8,000,000	$ 6,700,000
Defined Benefit Plan Disclosure [Line Items]
Increase projected benefit obligation	5,000,000
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Increase projected benefit obligation	(8,736,000)	4,488,000
Non-U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Expected pension contributions, next fiscal year	100,000
Increase projected benefit obligation	$ (301,000)	$ 317,000