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SELECTED QUARTERLY DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Selected quarterly financial data [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 119,940 |  | $ 126,386 | $ 131,617 | $ 113,668 | $ 118,539 | $ 128,809 | $ 131,622 |  | $ 121,182 |  | $ 491,611 | $ 500,153 | $ 567,080 | [1]
Gross profit | 22,075 |  | 27,617 | 29,042 | 23,278 | 24,579 | 26,575 | 25,692 |  | 23,074 |  | 102,010 | 99,908 | 108,827 |
Net (loss) earnings | (20,787) | [2] | $ 5,024 | $ 3,120 | $ 746 | $ 3,377 | $ 9,710 | 22,776 | [3] | (100,696) | [3] | (11,897) | (64,834) | 19,197 |
Net (loss) earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated transition tax | 17,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated transition tax, after tax credits | 16,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revaluation company's deferred tax assets | $ 2,000 |  |  |  |  |  |  |  |  |  |  | 6,300 |  |  |
Impairment charges |  |  |  |  |  |  |  |  |  | $ 104,300 |  |  | 106,000 |  |
Reversal of provisional non-cash impairment charges |  |  |  |  |  |  |  | $ (2,600) |  |  |  |  |  |  |
Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Selected quarterly financial data [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) earnings |  |  |  |  |  |  |  |  |  |  |  | $ (2,113) | $ (11,408) | $ 3,331 |
Net (loss) earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common share - basic and diluted (in dollars per share) | $ (1.66) |  | $ 0.40 | $ 0.24 | $ 0.05 | $ 0.27 | $ 0.78 | $ 1.83 |  | $ (8.15) |  | $ (0.97) | $ (5.25) | $ 1.53 |
Class B Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Selected quarterly financial data [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) earnings |  |  |  |  |  |  |  |  |  |  |  | $ (9,784) | $ (53,426) | $ 15,866 |
Net (loss) earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common share - basic and diluted (in dollars per share) | $ (1.74) |  | $ 0.42 | $ 0.26 | $ 0.06 | $ 0.29 | $ 0.82 | $ 1.93 |  | $ (8.55) |  | $ (0.99) | $ (5.48) | $ 1.64 |
[1] | (Revised)
[2] | The provision for income taxes in the fourth quarter of 2017 included an $18 million impact from the U.S. Tax Cuts and Jobs Act which was enacted on December 22, 2017. This consisted of an estimated transition tax on foreign earnings of approximately $16 million after the utilization of foreign tax credits and $2 million related to the revaluation of the Company's deferred tax assets.
[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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