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Long-Term Debt - Additional Information (Detail) (USD $)
9 Months Ended 9 Months Ended 9 Months Ended
Nov. 30, 2013
Revolving Credit Facility [Member]
Feb. 28, 2013
Revolving Credit Facility [Member]
Nov. 30, 2013
Standby letters of credit [Member]
Nov. 30, 2013
Third Amendment [Member]
Revolving Credit Facility [Member]
Sep. 19, 2013
Third Amendment [Member]
Revolving Credit Facility [Member]
Nov. 30, 2013
Second Amendment [Member]
Revolving Credit Facility [Member]
Nov. 30, 2012
Second Amendment [Member]
Revolving Credit Facility [Member]
Nov. 30, 2013
Second Amendment [Member]
Revolving Credit Facility [Member]
Minimum [Member]
Nov. 30, 2013
Second Amendment [Member]
Revolving Credit Facility [Member]
Maximum [Member]
Line of Credit Facility [Line Items]                  
Revolving credit facility, initiation date       Sep. 19, 2013          
Minimum tangible net worth, amount         $ 100,000,000        
Minimum tangible net worth percentage         25.00%        
Revolving credit facility, maximum borrowing capacity           150,000,000      
Revolving credit facility, additional borrowing capacity           200,000,000      
Revolving credit facility, maturity date           Aug. 16, 2016      
Revolving credit facility, interest rate description           London Interbank Offered Rate ("LIBOR") plus a spread ranging from 1.0% to 2.25%      
Revolving credit facility, variable basis spread               1.00% 2.25%
Revolving credit facility, interest rate variable basis spread, option one           1.25% 1.70%    
Revolving credit facility, interest rate variable basis spread, option two           1.49%      
Revolving credit facility, outstanding borrowings 95,500,000 57,500,000 3,300,000            
Revolving credit facility, remaining borrowing capacity     $ 51,200,000            
Revolving credit facility, percentage of capital securities of direct Foreign Subsidiary 65.00%