Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Details Textual 1)

v3.8.0.1
Borrowings (Details Textual 1) - USD ($)
Aug. 31, 2017
Feb. 28, 2017
Debt Instrument [Line Items]    
Derivative fixed average interest rate 1.00%  
LIBOR [Member]    
Debt Instrument [Line Items]    
Floating LIBOR rate debt $ 200,000,000  
Interest rate swap contracts [Member] | Designated as hedging instrument [Member]    
Debt Instrument [Line Items]    
Aggregate notional value of derivative instruments 200,000,000 $ 250,000,000
Interest rate swap contracts [Member] | Designated as hedging instrument [Member] | Cash flow hedging [Member]    
Debt Instrument [Line Items]    
Aggregate notional value of derivative instruments $ 200,000,000