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STOCKHOLDERS' EQUITY - Common Stock (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Nov. 07, 2014
USD ($)
shares
May. 21, 2014
USD ($)
shares
Dec. 10, 2013
USD ($)
$ / shares
shares
Jul. 02, 2013
USD ($)
shares
Jun. 21, 2013
USD ($)
institutional_investor
shares
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Class of Stock [Line Items]                
Net proceeds from issuance of common stock | $           $ 0 $ 103,656 $ 67,792
Common Stock                
Class of Stock [Line Items]                
Issuance of stock shares | shares   5,150,000     2,268,000      
Net proceeds from issuance of common stock | $ $ 49,900 $ 50,400     $ 29,500      
Number of institutional investors for which direct offering has been made | institutional_investor         2      
Common Stock | Patriot Financial Partners, L.P.                
Class of Stock [Line Items]                
Issuance of stock shares | shares 1,900,000   1,509,450          
Net proceeds from issuance of common stock | $     $ 20,000          
Stock issuance and sale, price per share | $ / shares     $ 13.25          
Common Stock | OCM BOCA Investor, LLC (Oaktree)                
Class of Stock [Line Items]                
Issuance of stock shares | shares 3,288,947              
Common Stock | Registered Direct Offering                
Class of Stock [Line Items]                
Issuance of stock shares | shares         1,153,846      
Net proceeds from issuance of common stock | $         $ 15,000      
Common Stock | Over Allotment Option                
Class of Stock [Line Items]                
Issuance of stock shares | shares   772,500   360,000        
Net proceeds from issuance of common stock | $   $ 7,600   $ 4,400        
Underwriters option period   30 days   30 days