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Changes in Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail)

v3.5.0.2
Changes in Accumulated Other Comprehensive Loss - Reclassifications Out of Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
(Loss) income before (benefit) provision for income taxes $ (15) $ 3,448
(Benefit) provision for income taxes (100) 1,087
Net income 85 2,361
Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Amortization of Actuarial Loss [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
(Loss) income before (benefit) provision for income taxes (348) (303)
Reclassifications Out of Accumulated Other Comprehensive Loss [Member] | Pension and Other Postretirement Benefits Items [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
(Loss) income before (benefit) provision for income taxes (348) (303)
(Benefit) provision for income taxes (123) (107)
Net income $ (225) $ (196)