Employee Benefit and Retirement Plans (Narrative) (Details) $ in Thousands	12 Months Ended
	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