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Accounting Policies and Basis of Presentation (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Apr. 14, 2016
Mar. 21, 2016
Apr. 21, 2015
Mar. 26, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Accounting Policies [Abstract]                  
Shipping and handling revenue         $ 3,939 $ 4,577 $ 8,076 $ 8,878  
Debt instrument, fair value disclosure         42,399   42,399   $ 34,603
Long-term debt, gross         41,369   41,369   33,460
Unamortized loan fees         $ 667   667   $ 636
Common stock, dividends, per share, declared (in Dollars per share)   $ 0.08   $ 0.06          
Payments of dividends $ 1,378   $ 1,087       $ 1,378 $ 1,087  
Dividends paid with cash 1,335   1,061            
Dividend equivalent payments $ 43   $ 26