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ACCOUNTING POLICIES (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Organization And Accounting Policies [Line Items]            
Cost of Goods Sold $ 320,837 $ 286,496 $ 638,609 $ 579,993    
Income (loss) from operations 3,958 2,593 (3,103) (8,945)    
Net income (loss) $ (6,537) $ (3,806) $ (17,122) $ (16,132)    
Basic (in dollars per share) $ (0.17) $ (0.10) $ (0.35) $ (0.43)    
Inventory, Net $ 323,491   $ 323,491   $ 272,236  
Retained earnings (1,128)   (1,128)   17,214  
Debt Instrument, Unamortized Discount (Premium), Net 3,656   3,656      
Long-term Debt $ 396,300   $ 396,300      
Debt Instrument, Interest Rate, Stated Percentage 5.625%   5.625%      
Debt Instrument, Fair Value Disclosure $ 412,000   $ 412,000      
Common Stock, Dividends, Per Share, Declared $ 0.005 $ 0.005 $ 0.010 $ 0.010    
Senior Secured Notes 6.875 Percent [Member]            
Organization And Accounting Policies [Line Items]            
Long-term Debt $ 400,000   $ 400,000   400,000  
Debt Instrument, Interest Rate, Stated Percentage 6.875%   6.875%      
Accounting Standards Update 2015-03 [Member]            
Organization And Accounting Policies [Line Items]            
Debt Instrument, Unamortized Discount (Premium), Net         4,148  
Scenario, Previously Reported [Member]            
Organization And Accounting Policies [Line Items]            
Cost of Goods Sold   $ 285,139   $ 575,045    
Income (loss) from operations   3,950   (3,997)    
Net income (loss)   $ (2,449)   $ (11,184)    
Basic (in dollars per share)   $ (0.07)   $ (0.34)    
Inventory, Net         269,291  
Retained earnings         14,269  
Restatement Adjustment [Member]            
Organization And Accounting Policies [Line Items]            
Cost of Goods Sold   $ 1,357   $ 4,948    
Income (loss) from operations   (1,357)   (4,948)    
Net income (loss)   $ (1,357)   $ (4,948)    
Basic (in dollars per share)   $ (0.03)   $ (0.09)    
Inventory, Net         2,945  
Retained earnings         $ 2,945 $ 6,600