Summary of Significant Accounting Policies Schedule of Other Accrued Expenses (Details) - USD ($) $ in Thousands	Apr. 28, 2017	Apr. 29, 2016
Accounting Policies [Abstract]
Legal and professional fees	$ 10,807	$ 4,119
Accrued customer incentives	1,912	1,872
Accrued broker fees	945	957
Accrued advertising	515	727
Accrued utilities	492	449
Accrued interest	16	541
Other	3,218	4,949
Total other accrued expenses	$ 17,905	$ 13,614