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Estimated Amount Amortized from Accumulated Other Comprehensive Income Into Net Periodic Benefit Cost (Detail)
$ in Thousands
Dec. 31, 2019
USD ($)
Defined Benefit Plan [Abstract]  
Prior service cost $ 36
Net actuarial loss 38
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year, Total $ 74