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Reclassifications of Accumulated Other Comprehensive Loss (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2016
USD ($)
[1]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]  
Reclassifications, net of tax $ (4,007)
Past-service cost  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]  
Reclassifications, before tax 187 [2]
Actuarial losses  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]  
Reclassifications, before tax (7,031) [2]
Amortization of defined benefit pension  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]  
Reclassifications, before tax (6,844)
Tax benefit 2,837
Reclassifications, net of tax $ (4,007)
[1] Amounts in parentheses indicate expense items.
[2] Please see Note 9, "Pension and Other Post-Retirement Benefits," for additional information.