Quarterly report pursuant to Section 13 or 15(d)

Stock Repurchase Program - Additional Information (Detail)

v2.4.0.8
Stock Repurchase Program - Additional Information (Detail) (USD $)
0 Months Ended 3 Months Ended
Sep. 04, 2013
Apr. 30, 2014
May 31, 2014
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock repurchase program, authorized amount $ 25,000,000    
Termination date of repurchase program   Jan. 31, 2015  
Increase in stock repurchase program authorized amount     40,000,000
Extended Termination date of repurchase program   Apr. 30, 2015  
Stock repurchased during period, Shares   339,400  
Common stock average price   $ 10.32  
Payments for repurchase including fee   $ 3,504,000