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Accumulated Other Comprehensive Loss - Schedule of Changes in Component of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Equity [Abstract]    
Unrealized holding gains (losses), tax $ (50) $ 750
Reclassification adjustment, tax 19 (236)
Pension liability adjustment, tax $ 13 $ (642)