Retirement Plans (Details 7) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain on defined benefit plan recognized in accumulated other comprehensive (loss) income	$ (45,749)	$ (27,999)
Total recognized in accumulated other comprehensive (loss) income	(45,749)	(27,999)
Net actuarial loss on defined benefit plan to be amortized from accumulated other comprehensive (loss) income in the next fiscal year	(2,717)
Defined benefit plan amounts that will be amortized from accumulated other comprehensive (loss) income in the next fiscal year	(2,717)
U.S. Retiree Healthcare Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain on defined benefit plan recognized in accumulated other comprehensive (loss) income	44	1,233
Prior service credit from defined benefit plan recognized in accumulated other comprehensive (loss) income		52
Total recognized in accumulated other comprehensive (loss) income	44	1,285
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss) gain on defined benefit plan recognized in accumulated other comprehensive (loss) income	(23,327)	(11,190)
Prior service credit from defined benefit plan recognized in accumulated other comprehensive (loss) income	719	1,933
Total recognized in accumulated other comprehensive (loss) income	(22,608)	(9,257)
Net actuarial loss on defined benefit plan to be amortized from accumulated other comprehensive (loss) income in the next fiscal year	(1,091)
Prior service credit from defined benefit plan to be amortized from accumulated other comprehensive (loss) income in the next fiscal year	121
Defined benefit plan amounts that will be amortized from accumulated other comprehensive (loss) income in the next fiscal year	$ (970)

The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (j)

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

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- Definition

Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (j)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Glossary Prior Service Cost

-URI http://asc.fasb.org/extlink&oid=6521920

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Prior Service Cost

-URI http://asc.fasb.org/extlink&oid=6521884

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

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

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