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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.

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