Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 01, 2017	Jul. 02, 2016
Net income per common share:
Net income	$ 21,809	$ 18,040
Denominator for basic net income per common share-weighted-average shares outstanding	23,805,138	23,320,579
Effect of dilution due to employee stock awards	384,237	306,172
Denominator for diluted net income per common share - weighted-average shares outstanding	24,189,375	23,626,751
Basic net income per common share (in dollars per share)	$ 0.92	$ 0.77
Diluted net income per common share (in dollars per share)	$ 0.90	$ 0.76