Annual report pursuant to Section 13 and 15(d)

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

v2.4.0.8
Financial Instruments and Derivative Financial Instrument - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Financial Instruments And Fair Value Measurements [Line Items]    
Letters of credit outstanding, amount $ 15,473 $ 12,354
Backlog [Member] | Customer One [Member]
   
Financial Instruments And Fair Value Measurements [Line Items]    
Concentration of risk percentage for backlog as of the balance sheet date 13.00% 21.00%
Backlog [Member] | Customer Two [Member]
   
Financial Instruments And Fair Value Measurements [Line Items]    
Concentration of risk percentage for backlog as of the balance sheet date 12.00% 12.00%