Employee Benefit Plans - Summary of Amounts Recognized in Accumulated Other Comprehensive Loss, Net of Income Tax (Detail) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2014
|
Mar. 31, 2013
|
Mar. 31, 2012
|
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Pension Plans, Defined Benefit [Member]
|
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Defined Benefit Plan Disclosure [Line Items] | |||
Net actuarial loss | $ 5,939 | $ 8,278 | |
Prior service cost | 2 | 5 | |
Total | 5,941 | 8,283 | 8,515 |
Other Postretirement Benefit Plans [Member]
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|||
Defined Benefit Plan Disclosure [Line Items] | |||
Net actuarial loss | 295 | 336 | |
Prior service cost | (68) | (176) | |
Total | $ 227 | $ 160 | $ 20 |