Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	Jun. 26, 2013	Aug. 03, 2013
Line of Credit Facility [Line Items]
Line of credit facility, additional borrowing capacity	$ 50
Line of credit facility, interest rate description	Borrowings made pursuant to the Credit Facility will bear interest at a rate equal to the base rate (determined as the highest of (a) Bank of America N.A.'s prime rate, (b) the Federal Funds rate plus 0.50% or (c) the one month LIBOR rate) plus a varying percentage, based on the Company's borrowing base, of 0.50%-0.75% (a decrease from 1.00%-1.25%) for prime-based borrowings and 1.50%-1.75% (a decrease from 2.00%-2.25%) for LIBOR-based borrowings
Line of credit facility, amount outstanding		12.3
Line of credit facility, remaining borrowing capacity		78.1
Line of credit facility, average outstanding amount		8.7
Line of credit facility, average unused excess availability		67.2
Before Amendment
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	75
Line of credit facility, expiration date	Nov. 10, 2014
Unused line fee	0.375%
After Amendment
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	100
Line of credit facility, expiration date	Jun. 26, 2018
Unused line fee	0.25%
Federal Funds Rate
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	0.50%
Prime-based Borrowings
Line of Credit Facility [Line Items]
Line of credit facility interest rate		3.75%
Prime-based Borrowings | Before Amendment | Minimum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	1.00%
Prime-based Borrowings | Before Amendment | Maximum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	1.25%
Prime-based Borrowings | After Amendment | Minimum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	0.50%
Prime-based Borrowings | After Amendment | Maximum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	0.75%
LIBOR-based Borrowings
Line of Credit Facility [Line Items]
Line of credit facility, expiration date		Aug. 06, 2013
Line of credit facility interest rate		1.65%
Line of credit facility, amount outstanding		5.0
LIBOR-based Borrowings | Before Amendment | Minimum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	2.00%
LIBOR-based Borrowings | Before Amendment | Maximum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	2.25%
LIBOR-based Borrowings | After Amendment | Minimum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	1.50%
LIBOR-based Borrowings | After Amendment | Maximum
Line of Credit Facility [Line Items]
Line of credit facility, basis spread on variable rate	1.75%
Standby Letters of Credit
Line of Credit Facility [Line Items]
Letters of credit outstanding, amount		1.8
Documentary Letters of Credit
Line of Credit Facility [Line Items]
Letters of credit outstanding, amount		1.1
Commercial and Standby Letters of Credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	20
Swingline Loans
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15