Annual report pursuant to Section 13 and 15(d)

Financial Instruments and Derivative Financial Instruments - Additional Information (Detail)

v3.8.0.1
Financial Instruments and Derivative Financial Instruments - Additional Information (Detail)
$ in Thousands
Mar. 31, 2018
USD ($)
ForwardContract
Mar. 31, 2017
USD ($)
ForwardContract
Concentration Risk [Line Items]    
Letters of credit outstanding amount | $ $ 8,233 $ 8,372
Foreign Exchange [Member]    
Concentration Risk [Line Items]    
Number of foreign exchange contracts held by the company | ForwardContract 0 0