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Executive Benefit Agreement, Employee Savings Plans and Collective Bargaining Agreements - Life Insurance Policies (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Compensation Related Costs [Abstract]    
Total face value of life insurance policies $ 4,500 $ 4,500
Total cash surrender values of life insurance policies 1,656 1,804
Loans on cash surrender values (1,559) (1,482)
Net cash surrender values $ 97 $ 322