Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Apr. 30, 2018	Dec. 29, 2017
Income Tax [Line Items]
Effective income tax rate	47.00%	33.20%	33.90%	34.50%
Tax Cuts and Jobs Act of 2017, net tax benefit	$ 1,200
Excess tax benefit related to stock-based compensation			$ 500
Effective income tax rate, proportional federal rate			34.40%	40.40%
Tax Cuts and Jobs Act of 2017, incomplete accounting, change in tax rate, deferred tax asset, provisional income tax expense			$ 1,600
Scenario, forecast
Income Tax [Line Items]
Effective income tax rate, proportional federal rate					30.40%
RSI Home Products, Inc.
Income Tax [Line Items]
Deferred income taxes	$ 67,800		$ 67,800			$ 67,478