|**EARNINGS PER SHARE (Tables)**                                                                                       | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
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|**Earnings Per Share [Abstract]**                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Schedule of Earnings Per Share Reconciliation [Table Text Block]                                                      | The following table presents a reconciliation of the weighted-average diluted shares outstanding:Year Ended December 31,201720162015(in thousands)Weighted-average common shares outstanding - basic65,83749,05239,153Weighted-average common shares and equivalents outstanding - diluted65,83749,05239,153                                                                                                                                                                              
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|                                                                                                                      | Year Ended December 31,                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                                                                      | 2017                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                                                                      | (in thousands)                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Weighted-average common shares outstanding - basic                                                                    | 65,837                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Weighted-average common shares and equivalents outstanding - diluted                                                  | 65,837                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]                | The following table presents the weighted-average common share equivalents excluded from the calculation of diluted earnings per share due to their anti-dilutive effect:Year Ended December 31,201720162015(in thousands)Weighted-average common share equivalents excluded from diluted earnings per share due to their anti-dilutive effect:Restricted stock590689831Convertible notes—292562Other equity-based awards75109101Total anti-dilutive common share equivalents6651,0901,494
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|                                                                                                                      | Year Ended December 31,                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                                                                      | 2017                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                                                                      | (in thousands)                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Weighted-average common share equivalents excluded from diluted earnings per share due to their anti-dilutive effect: |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Restricted stock                                                                                                      | 590                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Convertible notes                                                                                                     | —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Other equity-based awards                                                                                             | 75                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Total anti-dilutive common share equivalents                                                                          | 665                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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