Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Derivative Instruments - Additional Information (Detail)

v3.4.0.3
Derivative Instruments - Additional Information (Detail) - USD ($)
 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Derivative [Line Items]      
Notional amount of interest rate swap contracts $ 100,400,000 $ 128,600,000  
Derivative weighted average fixed interest rate 2.00%    
Weighted average remaining life of contracts 3 years 4 months 24 days    
Interest rate swap contracts included in Accounts Payable $ 3,700,000 3,100,000  
Unrealized (loss) gain on interest rate swap contracts (600,000) (2,600,000) $ 800,000
Realized loss on settlements of interest rate swap contracts (1,900,000) (1,300,000) $ (600,000)
Derivatives Not Accounted for As Hedges [Member] | Cash Flow Hedging [Member]      
Derivative [Line Items]      
Unrealized gain (loss) associated with the forward contracts not designated as a cash flow hedging arrangement 900,000 (2,300,000)  
Interest Rate Swap Contracts [Member] | Derivatives Not Accounted for As Hedges [Member]      
Derivative [Line Items]      
Notional amount of interest rate swap contracts 100,000,000 125,000,000  
Foreign Currency Forward Contracts [Member] | Derivatives Not Accounted for As Hedges [Member]      
Derivative [Line Items]      
Notional amount of interest rate swap contracts 400,000 3,600,000  
Unrealized gain classified in other comprehensive income $ 300,000 $ 300,000