Stock Buyback (Details) (USD $)	0 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Apr. 01, 2012	Mar. 27, 2011
Stock Buyback [Abstract]
Number of shares authorized to be repurchased (in shares)	3,593,350	3,593,350
Number of shares repurchased (in shares)	3,505,187
Number of shares repurchased under stock buy back program (in shares)				2,300
Shares repurchased	$ 30,700,000
Average cost per share (in dollars per share)	$ 8.76			$ 13.96
Remaining number of shares authorized to be repurchased (in shares)	88,163	88,163
Tax withholding for share based compensation		$ 2,161,900	$ 1,888,000	$ 1,569,000