Credit Facility - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Dec. 07, 2011	Feb. 01, 2014	Dec. 07, 2011
Wells Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility term	5 years
Maximum borrowing capacity	$ 100,000,000		$ 100,000,000
Revolving credit facility interest rate description		Borrowings under the Wells Credit Facility bear interest at a floating rate which, at the Company’s option, may be determined by reference to a LIBOR Rate or a Base Rate, plus 1.75% or 0.75%, respectively, (as defined in the Wells Credit Facility, 1.91% as of February 1, 2014)
Revolving credit facility reference to floating interest rate		1.91%
New credit facility maturity date			Dec. 07, 2016
Direct borrowings		0
Letters of credit outstanding		10,000,000
Wells Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Availability under Wells Fargo Facility		25,000,000
Wells Credit Facility [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Revolving credit facility reference to floating interest rate		1.75%
Wells Credit Facility [Member] | Base Rate [Member]
Line of Credit Facility [Line Items]
Revolving credit facility reference to floating interest rate		0.75%
Swing-line loans [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 12,500,000.0