Debt Agreement - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended			1 Months Ended
	Dec. 01, 2012	Dec. 01, 2012 Minimum	Dec. 01, 2012 Maximum	Nov. 30, 2012 Amended Credit Agreement	Nov. 30, 2013 Amended Credit Agreement
Debt Disclosure [Line Items]
Unsecured revolving credit facility, maximum borrowing capacity				$ 100
Revolving credit facility agreement, expiration date				Nov. 30, 2017
Increase in credit facility maximum borrowing capacity				200
Stand-by letters of credit					2.5
Revolving credit facility available for borrowing					$ 97.5
Revolving credit facility, LIBOR rate		0.90%	1.75%
Revolving credit facility, base rate			0.75%
Revolving credit facility, commitment fee percentage		0.10%	0.25%
Revolving credit facility, letter of credit fee percentage		0.40%	1.25%
Revolving credit facility commitment fee description	The Amended Credit Agreement pricing grid is adjusted quarterly and is based on the Company’s leverage ratio (as defined in the Amended Credit Agreement). The minimum pricing is LIBOR plus 0.90% or Base Rate (as defined in the Amended Credit Agreement) and the maximum pricing is LIBOR plus 1.75% or Base Rate (as defined in the Amended Credit Agreement) plus 0.75%. The Company is subject to an unused commitment fee based on the Company’s leverage ratio with minimum pricing of 0.10% and maximum pricing of 0.25%. In addition, the Company is subject to a letter of credit fee based on the Company’s leverage ratio with minimum pricing of 0.40% and maximum pricing of 1.25%.