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Executive Benefit Agreements, Employee Savings Plans and Collective Bargaining Agreements - Life Insurance Premiums (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Compensation Related Costs [Abstract]      
Cost of life insurance premiums $ 481 $ 1,040 $ 1,077
Increases in cash surrender values (51) (586) (714)
Net cost of life insurance premiums included in SG&A $ 430 $ 454 $ 363