DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ 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
 [2]
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Anti-dilutive securities excluded from earnings per share calculation (in shares)                 0 0 0
Numerator [Abstract]                      
Net (loss) earnings $ 3,377 $ 9,710 $ 22,776 [1] $ (100,696) [1] $ 2,895 $ 4,920 $ 6,062 $ 5,320 $ (64,834) $ 19,197 $ 8,603
Undistributed (loss) earnings                 (68,084) 15,962 5,416
Class A [Member]                      
Numerator [Abstract]                      
Net (loss) earnings                 (11,408) 3,331 1,492
Less dividends declared                 522 522 522
Undistributed (loss) earnings                 $ (11,930) $ 2,809 $ 970
Weighted average shares outstanding [Abstract]                      
Weighted average shares outstanding (in shares)                 2,175 2,175 2,175
Net (loss) earnings per share [Abstract]                      
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 $ (5.25) $ 1.53 $ 0.69
Class B [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Dividend rate Class B common stock in excess of dividend rate of Class A common stock                 5.00% 5.00% 5.00%
Undistributed earning allocation rate of Class B common stock in excess of Class A common stock, percentage                 5.00% 5.00% 5.00%
Numerator [Abstract]                      
Net (loss) earnings                 $ (53,426) $ 15,866 $ 7,111
Less dividends declared                 2,728 2,713 2,665
Undistributed (loss) earnings                 $ (56,154) $ 13,153 $ 4,446
Weighted average shares outstanding [Abstract]                      
Weighted average shares outstanding (in shares)                 9,749 9,698 9,491
Net (loss) earnings per share [Abstract]                      
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 $ (5.48) $ 1.64 $ 0.75
[1] 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.
[2] 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.