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Information For the Pension Plan With Respect To Accumulated Benefit Obligation and Plan Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Asset [Line Items]    
Projected benefit obligation $ 3,968 $ 3,896
Accumulated benefit obligation 3,804 3,847
Fair value of plan assets $ 4,458 $ 4,485