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Changes in Accumulated Other Comprehensive Loss - The Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] | ||||
| Income before provision for income taxes | $ 3,846 | $ 3,861 | $ 9,464 | $ 5,944 |
| Provision for income taxes | 1,257 | 1,246 | 3,067 | 1,939 |
| Net income | 2,589 | 2,615 | 6,397 | 4,005 |
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Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Prior Service Benefit [Member]
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| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] | ||||
| Income before provision for income taxes | 41 | 81 | ||
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Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Amortization of Actuarial Loss [Member]
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| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] | ||||
| Income before provision for income taxes | (262) | (523) | ||
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Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Pension and Other Postretirement Benefits Items [Member]
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| Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] | ||||
| Income before provision for income taxes | (221) | (442) | ||
| Provision for income taxes | (78) | (156) | ||
| Net income | $ (143) | $ (286) | ||