Pension Plan - Schedule of Accumulated Benefit Obligation, Change in Projected Benefit Obligation, Change in Plan Assets, Funded Status, and Reconciliation to Amounts Recognized in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Change in benefit obligation
Projected benefit obligation at beginning of year	$ 51,339	$ 54,315
Service cost	1,122us-gaap_DefinedBenefitPlanServiceCost	1,262us-gaap_DefinedBenefitPlanServiceCost	1,283us-gaap_DefinedBenefitPlanServiceCost
Interest cost	2,447us-gaap_DefinedBenefitPlanInterestCost	2,402us-gaap_DefinedBenefitPlanInterestCost	2,402us-gaap_DefinedBenefitPlanInterestCost
Actuarial (gain)/loss	6,637	(3,095)
Other assumption change	3,695us-gaap_DefinedBenefitPlanOtherChanges
Benefits paid	(4,395)us-gaap_DefinedBenefitPlanBenefitsPaid	(3,545)us-gaap_DefinedBenefitPlanBenefitsPaid
Projected benefit obligation at end of year	60,845	51,339	54,315
Change in plan assets:
Fair value of plan assets at beginning of year	49,424	44,974
Company contributions	3,000	3,000
Gains on plan assets	2,965	4,995
Benefits paid	(4,395)us-gaap_DefinedBenefitPlanBenefitsPaid	(3,545)us-gaap_DefinedBenefitPlanBenefitsPaid
Fair value of plan assets at end of year	50,993	49,424	44,974
Funded status (benefit obligation less plan assets)	(9,852)	(1,915)
Accumulated benefit obligation at end of year	$ 56,170	$ 46,815

Pension Plan - Schedule of Accumulated Benefit Obligation, Change in Projected Benefit Obligation, Change in Plan Assets, Funded Status, and Reconciliation to Amounts Recognized in Consolidated Balance Sheets (Detail) (USD $)
In Thousands, unless otherwise specified

12 Months Ended

Feb. 28, 2015

Feb. 28, 2014

Feb. 28, 2013

Change in benefit obligation

Projected benefit obligation at beginning of year

$ 51,339us-gaap_DefinedBenefitPlanBenefitObligation

$ 54,315us-gaap_DefinedBenefitPlanBenefitObligation

Service cost

1,122us-gaap_DefinedBenefitPlanServiceCost

1,262us-gaap_DefinedBenefitPlanServiceCost

1,283us-gaap_DefinedBenefitPlanServiceCost

Interest cost

2,447us-gaap_DefinedBenefitPlanInterestCost

2,402us-gaap_DefinedBenefitPlanInterestCost

Actuarial (gain)/loss

6,637us-gaap_DefinedBenefitPlanActuarialGainLoss

(3,095)us-gaap_DefinedBenefitPlanActuarialGainLoss

Other assumption change

3,695us-gaap_DefinedBenefitPlanOtherChanges

Benefits paid

(4,395)us-gaap_DefinedBenefitPlanBenefitsPaid

(3,545)us-gaap_DefinedBenefitPlanBenefitsPaid

Projected benefit obligation at end of year

60,845us-gaap_DefinedBenefitPlanBenefitObligation

51,339us-gaap_DefinedBenefitPlanBenefitObligation

54,315us-gaap_DefinedBenefitPlanBenefitObligation

Change in plan assets:

Fair value of plan assets at beginning of year

49,424us-gaap_DefinedBenefitPlanFairValueOfPlanAssets

44,974us-gaap_DefinedBenefitPlanFairValueOfPlanAssets

Company contributions

3,000us-gaap_DefinedBenefitPlanContributionsByEmployer

Gains on plan assets

2,965ebf_DefinedBenefitPlanGainsLossOnPlanAssets

4,995ebf_DefinedBenefitPlanGainsLossOnPlanAssets

Benefits paid

(4,395)us-gaap_DefinedBenefitPlanBenefitsPaid

(3,545)us-gaap_DefinedBenefitPlanBenefitsPaid

Fair value of plan assets at end of year

50,993us-gaap_DefinedBenefitPlanFairValueOfPlanAssets

49,424us-gaap_DefinedBenefitPlanFairValueOfPlanAssets

44,974us-gaap_DefinedBenefitPlanFairValueOfPlanAssets

Funded status (benefit obligation less plan assets)

(9,852)us-gaap_DefinedBenefitPlanFundedStatusOfPlan

(1,915)us-gaap_DefinedBenefitPlanFundedStatusOfPlan

Accumulated benefit obligation at end of year

$ 56,170us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation

$ 46,815us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation

- Definition

Defined Benefit Plan Gains Loss On Plan Assets

+ References

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- Definition

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503844

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (e)

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- Definition

Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

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- Definition

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

-URI http://asc.fasb.org/extlink&oid=6522206

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503904

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- Definition

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Benefits

-URI http://asc.fasb.org/extlink&oid=6506267

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- Definition

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

+ References

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- Definition

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.

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- Definition

The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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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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- Definition

Changes in the defined benefit obligation, not otherwise separately disclosed in the financial statements.

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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

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 20

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

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