Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Narrative) (Details)

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STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 09, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Preferred stock, shares authorized   500,000   500,000   500,000
Shares issued and sold   17,250        
Preferred stock, par value (in dollars per share)   $ 10.00   $ 10.00    
Preferred stock, shares outstanding   17,250   17,250   0
Net proceeds from issuance of preferred stock       $ 166,363 $ 0  
Reclassifications of unrealized gains (losses) on AFS   $ 10,339 $ 51 $ 12,275 $ 202  
Depositary Shares            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Shares issued and sold 6,900,000          
Number of shares to be purchased upon the exercise of options 900,000          
Preferred stock, liquidation preference (usd per share) $ 25          
Series A Preferred Stock            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Number of preferred stock represented by each depositary share The Series A preferred stock is represented by depositary shares, each representing a 1/400th ownership interest in a share of Series A preferred stock          
Preferred stock, liquidation preference (usd per share) $ 10,000          
Net proceeds from issuance of preferred stock $ 166,400