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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ 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 (a)

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Projected Benefit Obligation

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Postretirement Benefits

-URI http://asc.fasb.org/extlink&oid=6521376

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-Name Accounting Standards Codification

-Glossary Benefits

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

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Amount of net gain (loss) recognized in net periodic benefit cost as a result of 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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-SubTopic 30

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Pension Benefits and Other Postretirement Benefit Plans (Additional Information) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 22, 2015
Pension and Other Postretirement Benefits Disclosure [Line Items]
Employer contributions	$ 0	$ 800,000
Pension Benefits [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Settlement charge		110,000
Pension Benefits [Member] \| Former President and Chief Executive Officer [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Benefit payments		800,000
Settlement charge		100,000
Pension Benefits [Member] \| Arlon [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Benefit obligation assumed			$ 2,000,000