Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Summary of Increase/Decrease in Accumulated Other Comprehensive Loss, Net of Income Tax (Detail)

v2.4.0.8
Employee Benefit Plans - Summary of Increase/Decrease in Accumulated Other Comprehensive Loss, Net of Income Tax (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Defined Benefit Plan Disclosure [Line Items]      
Total $ (2,275) $ (92) $ 3,223
Pension Plans, Defined Benefit [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Net actuarial (gain) loss arising during the year (1,692) 424  
Amortization of actuarial loss (647) (653)  
Amortization of prior service cost (3) (3)  
Total (2,342) (232)  
Other Postretirement Benefit Plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Net actuarial (gain) loss arising during the year (10) 61  
Amortization of actuarial loss (30) (28)  
Amortization of prior service cost 107 107  
Total $ 67 $ 140