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STOCKHOLDERS' EQUITY - Tangible Equity Units (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Aug. 03, 2015
shares
May. 21, 2014
USD ($)
$ / shares
shares
Mar. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
Class of Stock [Line Items]        
Minimum settlement rate   4.4456    
Market value greater or equal to | $ / shares   $ 11.247    
Maximum settlement rate   5.1124    
Market value less than or equal to | $ / shares   $ 9.78    
Tangible equity units settled     1,323,055  
Tangible equity units outstanding     56,945  
Long term debt, net | $     $ 260,896 $ 261,876
Common Stock | Class A Common Stock        
Class of Stock [Line Items]        
Issuance of shares of voting common stock 70,690   5,881,766  
Junior Subordinated Debt | 7.50% Amortizing Note Due May 15, 2017        
Class of Stock [Line Items]        
Tangible equity units issued during period, shares   1,380,000    
Tangible equity units issued to underwriter during period, shares   180,000    
Proceeds from issuance of tangible equity units, net of issuance costs | $   $ 65,000    
Tangible equity units, convertible, conversion ratio   10.604556    
Stated interest rate   7.50%    
Equal quarterly cash installments per Amortizing Note   1.00    
Installment payment due on August 15, 2014 per Amortizing Note   0.933333    
Tangible equity units dividend rate   8.00%    
Tangible equity units, price per share | $ / shares   $ 50.00    
Junior Subordinated Debt | 7.50% Amortizing Note Due May 15, 2017 | Long Term Debt        
Class of Stock [Line Items]        
Long term debt, net | $     $ 6,400 $ 7,500