Quarterly report pursuant to Section 13 or 15(d)

Stock Repurchase Program - Additional Information (Detail)

v2.4.1.9
Stock Repurchase Program - Additional Information (Detail) (USD $)
0 Months Ended 1 Months Ended 3 Months Ended
May 31, 2014
Apr. 30, 2015
Apr. 30, 2015
Apr. 30, 2014
May 31, 2014
Sep. 04, 2013
Equity [Abstract]            
Stock repurchase program, authorized amount           $ 25,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
Termination date of repurchase program Apr. 30, 2015          
Increase in stock repurchase program authorized amount         40,000,000seac_StockRepurchaseProgramAuthorizedAmountIncreased  
Stock repurchased during period, Shares   591,520us-gaap_TreasuryStockSharesAcquired 0us-gaap_TreasuryStockSharesAcquired      
Common stock average price   $ 9.31us-gaap_TreasuryStockAcquiredAverageCostPerShare        
Repurchases of common stock   $ 5,500,000us-gaap_PaymentsForRepurchaseOfCommonStock   $ 3,504,000us-gaap_PaymentsForRepurchaseOfCommonStock