Employee Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net periodic benefit cost [Abstract]
Discount used to re-measure plan obligations	4.80%		4.80%
Reduction in current quarter pension expense	$ 7,348
Total amount amortized out of accumulated other comprehensive income	6,368	16,268	22,579	16,268
U.S. Pension Plans, Defined Benefit [Member]
Net periodic benefit cost [Abstract]
Service Cost	4,088	3,602	13,290	10,804
Interest Cost	6,247	6,284	18,491	18,852
Expected return on plan assets	(10,106)	(9,744)	(30,011)	(29,234)
Prior service cost (income)	256	260	769	786
Recognized actuarial (gain) loss	3,771	3,378	14,741	10,136
Transition obligation	0	0	0	0
Settlement and curtailment loss (gain)	0	0	0	0
Other	0	0	0	0
Net periodic benefit cost	4,256	3,780	17,280	11,344
Foreign Pension Plans, Defined Benefit [Member]
Net periodic benefit cost [Abstract]
Service Cost	1,471	1,079	4,387	3,147
Interest Cost	2,264	2,231	6,748	6,428
Expected return on plan assets	(2,395)	(2,022)	(7,138)	(5,810)
Prior service cost (income)	28	30	85	89
Recognized actuarial (gain) loss	373	130	1,112	371
Transition obligation	(3)	(13)	(10)	(36)
Settlement and curtailment loss (gain)	353	0	353	0
Other	39	56	118	158
Net periodic benefit cost	2,130	1,491	5,655	4,347
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Net periodic benefit cost [Abstract]
Service Cost	1,246	1,326	4,604	3,978
Interest Cost	1,633	1,979	5,180	5,937
Prior service cost (income)	2,045	1,857	6,040	5,569
Recognized actuarial (gain) loss	(32)	33	52	103
Settlement and curtailment loss (gain)	(4,411)	0	(4,411)	0
Net periodic benefit cost	481	5,195	11,465	15,587
Post-Retirement Benefits [Member]
Net periodic benefit cost [Abstract]
Service Cost	59	62	176	186
Interest Cost	130	149	392	445
Prior service cost (income)	(104)	(104)	(312)	(312)
Recognized actuarial (gain) loss	34	(5)	102	(15)
Settlement and curtailment loss (gain)	0	0	0	(1,493)
Net periodic benefit cost	$ 119	$ 102	$ 358	$ (1,189)

Reduction in current quarter pension expense due to re-measurement of plan.

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- Definition

The amount of gains or losses recognized in net periodic benefit cost.

+ References

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- Definition

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.

+ References

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- Definition

The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

+ References

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- Definition

The interest rate used to adjust for the time value of money for the plan.

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- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512136

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Glossary Expected Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512171

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(3)

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- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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- Definition

Amount of other defined benefit plan costs.

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- Definition

Amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ 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 (h)(1)

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Service Cost (Component of Net Periodic Pension Cost)

-URI http://asc.fasb.org/extlink&oid=6525008

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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- Definition

Amount before tax of reclassification adjustment from accumulated other comprehensive (income) loss related to net period benefit cost (credit) for pension and other postretirement defined benefit plans.

+ References

No definition available.

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