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Executive Benefits Agreements and Employees Savings Plans - Life Insurance Policies (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Compensation Related Costs [Abstract]    
Total face value of life insurance policies $ 21,242 $ 26,242
Total cash surrender values of life insurance policies 5,007 6,936
Loans on cash surrender values (1,288)  
Net cash surrender values $ 3,719 $ 6,936