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Employee Benefit and Retirement Plans (Narrative) (Details) $ in Thousands | 12 Months Ended
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Apr. 30, 2017 USD ($) plan | Apr. 30, 2016 USD ($) | Apr. 30, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |
Recognized expenses for profit-sharing contributions | $ 3,600 | $ 2,900 | $ 1,800
401(k) contributions, percent match of employee's annual contribution |  |  | 100.00%
Effective maximum contribution of base earnings |  |  | 4.00%
Expense for 401(k) matching contributions | $ 7,200 | 6,600 | $ 5,600
Number of defined benefit pension plans | plan | 2 |  |
Accumulated other comprehensive loss | $ 66,300 |  |
Accumulated other comprehensive loss, net of tax | 40,417 | 47,285 |
Expected recognized net actuarial losses in net periodic pension benefit cost, before tax | 1,600 |  |
Expected recognized net actuarial losses in net periodic pension benefit cost, after tax | 1,000 |  |
Accumulated benefit obligation | 165,200 | 174,100 |
Expected company contributions to pension plan in 2015 | 5,700 |  |
Company contributions | $ 27,304 | $ 5,016 |
Plan asset actual allocation | 100.00% | 100.00% |
Capital Preservation [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset actual allocation | 10.00% |  |
Bonds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset actual allocation | 33.00% |  |
Equity Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan asset actual allocation | 57.00% | 57.00% |
Minimum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percent of after tax earnings contributed in profit sharing | 0.00% |  |
Maximum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percent of after tax earnings contributed in profit sharing | 5.00% |  |
American Woodmark Investment Savings Stock Ownership Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined contribution plan, minimum age requirement | 18 years |  |
Defined contribution plan, minimum consecutive months employed requirement | 6 months |  |

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- Definition Defined Benefit Plan Expected Actuarial Gain Losses Next Fiscal Year Before Tax + References No definition available. + Details
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- Definition The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j-k) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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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) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + 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 (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 + Details
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