Pension and Non-pension Postretirement Benefits (Net Benefit Costs) (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Pension Plans and SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,909,000	$ 1,603,000
Interest cost	4,812,000	5,294,000
Expected return on plan assets	(6,260,000)	(6,240,000)
Amortization of unrecognized:
Prior service cost	40,000	322,000
Loss / (gain)	2,292,000	1,500,000
Pension expense or non-pension postretirement benefit expense	2,793,000	2,479,000
Defined Benefit Plan, Contributions [Abstract]
Employer contributions made to defined benefit plans	1,400,000
Estimated employer contributions to defined benefit plans in remainder of 2015	3,300,000
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,161,000	1,025,000
Interest cost	3,709,000	3,870,000
Expected return on plan assets	(5,662,000)	(5,608,000)
Amortization of unrecognized:
Prior service cost	104,000	265,000
Loss / (gain)	1,886,000	1,242,000
Pension expense or non-pension postretirement benefit expense	1,198,000	794,000
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	748,000	578,000
Interest cost	1,103,000	1,424,000
Expected return on plan assets	(598,000)	(632,000)
Amortization of unrecognized:
Prior service cost	(64,000)	57,000
Loss / (gain)	406,000	258,000
Pension expense or non-pension postretirement benefit expense	1,595,000	1,685,000
Non-Pension Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	282,000	252,000
Interest cost	679,000	737,000
Amortization of unrecognized:
Prior service cost	35,000	35,000
Loss / (gain)	196,000	67,000
Pension expense or non-pension postretirement benefit expense	1,192,000	1,091,000
Defined Benefit Plan, Contributions [Abstract]
Employer contributions made to defined benefit plans	900,000
Estimated employer contributions to defined benefit plans in year 2015	4,900,000
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	282,000	252,000
Interest cost	660,000	710,000
Amortization of unrecognized:
Prior service cost	35,000	35,000
Loss / (gain)	196,000	67,000
Pension expense or non-pension postretirement benefit expense	1,173,000	1,064,000
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	19,000	27,000
Amortization of unrecognized:
Prior service cost	0	0
Loss / (gain)	0	0
Pension expense or non-pension postretirement benefit expense	$ 19,000	$ 27,000

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- Definition

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

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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.

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The increase in the fair value of plan assets from contributions made by the employer.

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Glossary Expected Return on Plan Assets

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (h)(3)

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

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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

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)

-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

-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=35743120&loc=d3e1928-114920

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

+ References

No definition available.

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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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