Stock Buyback (Details) (USD $)	0 Months Ended	6 Months Ended		113 Months Ended
	Jul. 01, 2008	Sep. 30, 2012	Sep. 25, 2011	Sep. 30, 2012
Stock Buyback [Abstract]
Number of shares authorized to be repurchased (in shares)		3,593,350		3,593,350
Number of shares repurchased (in shares)	705,000			3,505,187
Shares repurchased	$ 6,400,000			$ 30,700,000
Average cost per share (in dollars per share)	$ 9.09			$ 8.76
Remaining number of shares authorized to be repurchased (in shares)		88,163		88,163
Tax withholding for share based compensation		$ 1,799,000	$ 511,700