Shareholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	3 Months Ended		3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 28, 2014	Sep. 28, 2012 Incentive Plan 2009	Dec. 25, 2009 Incentive Plan 2009	Dec. 25, 2009 Incentive Plan 2009 Stock Options	Dec. 25, 2009 Incentive Plan 2009 Stock Options Minimum	Dec. 25, 2009 Incentive Plan 2009 Stock Options Maximum	Mar. 28, 2014 Incentive Plan 2009 Restricted Stock Minimum	Mar. 28, 2014 Incentive Plan 2009 Restricted Stock Maximum	Sep. 30, 2005 Employee Stock Purchase Plan, Twenty Zero Four	Mar. 28, 2014 Employee Stock Purchase Plan, Twenty Zero Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock, authorized			1,300,000
Shares under prior plans may become available for issuance			2,963,375
Additional authorized number of shares that may be issued		1,700,000
Maximum number of shares that may be issued		5,963,375
Share based compensation, award vesting period				3 years			1 year	3 years
Stock options expiration period after date of grant					7 years	10 years
Total pretax intrinsic value of options outstanding and options exercisable	$ 0
Weighted average remaining contractual term of stock options	1 year 4 months 24 days
Employee Stock Purchase Plan, maximum percentage of earnings contribution toward purchase of common stock									10.00%
Employee Stock Purchase Plan, purchase price as percentage of fair market value of common stock									85.00%
Employee Stock Purchase Plan, number of common stock to be purchased										556,000