Retirement Plans and Postretirement Medical Benefits (Estimated Amounts to be Amortized from AOCI into Net Periodic Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014
United States
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 30,590
Prior service cost (credit)	9
Transition asset	0
Total	30,599
Foreign
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	6,828
Prior service cost (credit)	(79)
Transition asset	(10)
Total	6,739
Nonpension postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	9,619
Prior service cost (credit)	297
Total	$ 9,916

Amount included in accumulated other comprehensive income (AOCI) related to transition obligation (asset) expected to be recognized as components of net periodic benefit cost (credit) for the fiscal year that follows the most recent annual statement of financial position.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (s)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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