Summary of Significant Accounting Policies - Weighted Average Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 23, 2015	Oct. 24, 2014	Oct. 23, 2015	Oct. 24, 2014
Accounting Policies [Abstract]
Basic (in shares)	22,115	23,509	22,421	23,467
Dilutive shares (in shares)	118	226	151	231
Diluted (in shares)	22,233	23,735	22,572	23,698