Defined Benefit Pension Plans Level 3 Plan Asset Rollforward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 10,761	$ 11,680
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	10,035	10,834	7,658
Defined Benefit Plan, Transfers Between Measurement Levels	172	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(1,343)	(87)
Defined Benefit Plan, Purchases, Sales, and Settlements	(81)	3,155
Defined Benefit Plan, Actual Return on Plan Assets	453	108
Securities (Assets) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,595	2,574
Securities (Assets) [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,595	2,574	0
Defined Benefit Plan, Transfers Between Measurement Levels	172	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(365)	(406)
Defined Benefit Plan, Purchases, Sales, and Settlements	(106)	3,050
Defined Benefit Plan, Actual Return on Plan Assets	320	(70)
Guaranteed Insurance Benefit Type [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,440	8,260
Guaranteed Insurance Benefit Type [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,440	8,260	7,658
Defined Benefit Plan, Transfers Between Measurement Levels	0	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(978)	319
Defined Benefit Plan, Purchases, Sales, and Settlements	25	105
Defined Benefit Plan, Actual Return on Plan Assets	$ 133	$ 178

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Actual Return on Plan Assets (Component of Net Periodic Postretirement Benefit Cost)

-URI http://asc.fasb.org/extlink&oid=6504192

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(1)

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Actual Return on Plan Assets (Component of Net Periodic Pension Cost)

-URI http://asc.fasb.org/extlink&oid=6504226

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ 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 (b)

-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 715

-SubTopic 30

-Section 35

-Paragraph 50

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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Amount of increase (decrease) in plan assets from purchases, sales and settlement of plan obligations.

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

-Publisher FASB

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Transfers in and out of Level 3. For example, transfers due to changes in the observability of significant inputs.

+ 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 (d)(iv)(02)(C)

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-Publisher FASB

-Name Accounting Standards Codification

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-Subparagraph (c)(iv)(02)(C)

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