Common Stock - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended		0 Months Ended	9 Months Ended		0 Months Ended		0 Months Ended
	Oct. 16, 2013	Nov. 30, 2013	Dec. 01, 2012	Nov. 30, 2013	Dec. 01, 2012	Jul. 21, 2011	Nov. 30, 2013 Jul. 21, 2011	Jul. 21, 2011 Maximum	Jan. 03, 2013 Repurchase Of Equity Jul. 21, 2011	Nov. 30, 2013 Repurchase Of Equity Jul. 21, 2011	Dec. 13, 2013 Subsequent Event
Class of Stock [Line Items]
Stock repurchase program, shares authorized to be repurchased								5,000,000	5,000,000
Stock repurchase program, expiration date						Dec. 31, 2014			Dec. 31, 2017
Treasury stock purchased (in shares)							815,877
Stock repurchase program, average price per share							$ 21.43
Treasury stock purchased							$ 17.5
Stock repurchase program, shares available to repurchase										4,104,464
Common stock dividends declared per share	$ 0.07	$ 0.07	$ 0.06	$ 0.21	$ 0.18
Common stock dividend declared		3.4
Common stock dividends payment											$ 3.4
Dividend payable , date of payment				Dec. 13, 2013
Dividend payable , date of record				Nov. 29, 2013