SELECTED QUARTERLY DATA (UNAUDITED) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Selected quarterly financial data [Abstract]                      
Net sales $ 118,539 $ 128,809 $ 131,622 $ 121,182 $ 135,246 $ 144,161 $ 145,658 $ 142,015 [1] $ 500,153 $ 567,080 [2] $ 487,076 [2]
Gross profit 24,579 26,575 25,692 23,074 26,043 27,412 28,560 26,813 [1] 99,908 108,827 87,355
Net (loss) earnings $ 3,377 $ 9,710 22,776 [3] (100,696) [3] $ 2,895 $ 4,920 $ 6,062 5,320 [1] (64,834) 19,197 8,603
Net (loss) earnings per share:                      
Provisional non-cash impairment charges       $ 104,300         106,000    
Reversal of provisional non-cash impairment charges     $ (2,600)                
Measurement Period Adjustment [Member]                      
Selected quarterly financial data [Abstract]                      
Gross profit               27,100      
Net (loss) earnings               $ 5,600      
Class A Common Stock [Member]                      
Selected quarterly financial data [Abstract]                      
Net (loss) earnings                 $ (11,408) $ 3,331 $ 1,492
Net (loss) earnings per share:                      
Common share - basic and diluted (in dollars per share) $ 0.27 $ 0.78 $ 1.83 $ (8.15) $ 0.23 $ 0.39 $ 0.49 $ 0.43 [1] $ (5.25) $ 1.53 $ 0.69
Class A Common Stock [Member] | Measurement Period Adjustment [Member]                      
Net (loss) earnings per share:                      
Common share - basic and diluted (in dollars per share)               0.45      
Class B Common Stock [Member]                      
Selected quarterly financial data [Abstract]                      
Net (loss) earnings                 $ (53,426) $ 15,866 $ 7,111
Net (loss) earnings per share:                      
Common share - basic and diluted (in dollars per share) $ 0.29 $ 0.82 $ 1.93 $ (8.55) $ 0.25 $ 0.42 $ 0.52 0.45 [1] $ (5.48) $ 1.64 $ 0.75
Class B Common Stock [Member] | Measurement Period Adjustment [Member]                      
Net (loss) earnings per share:                      
Common share - basic and diluted (in dollars per share)               $ 0.48      
[1] Revised from 10-Q disclosures to reflect immaterial measurement period adjustments related to the 2014 Acquisitions. First quarter 10-Q reflected gross profit of $27.1 million, net earnings of $5.6 million, earnings per Class A common share of $0.45 per share and earnings per Class B common share of $0.48 per share.
[2] (Revised)
[3] In connection with an interim impairment test related to the Company's goodwill and other intangible assets, provisional non-cash impairment charges totaling $104.3 million were recorded during the first quarter of 2016. During the second quarter of 2016, the Company finalized its interim impairment test, which resulted in a $2.6 million reduction to the provisional impairment charge recorded during the first quarter.