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STOCKHOLDERS' EQUITY - Additional Information (Detail) - USD ($)
3 Months Ended
Feb. 14, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Class Of Stock [Line Items]        
Common stock, shares authorized   2,000,000,000   2,000,000,000
Common stock, par value   $ 0.1   $ 0.1
Common stock, shares issued   222,955,394   222,103,721
Common stock, shares outstanding   218,160,725   217,359,337
Common Stock, Dividends, Per Share, Declared $ 0.05 $ 0.05 $ 0.03  
Preferred Stock, Shares Authorized   50,000,000   50,000,000
Preferred stock, par value   $ 1.00    
Liquidation value per share   $ 25    
Shares of common stock repurchased   50,285 168,679  
Stock repurchase plan treasury stock   4,794,669   4,744,384
Legal surplus reserve rate   10.00%    
Puerto Rico Banking Law Description   The Puerto Rico Banking Law provides that, when the expenditures of a Puerto Rico commercial bank are greater than receipts, the excess of the expenditures over receipts must be charged against the undistributed profits of the bank, and the balance, if any, must be charged against the legal surplus reserve, as a reduction thereof. If there is no legal surplus reserve sufficient to cover such balance in whole or in part, the outstanding amount must be charged against the capital account and the Bank cannot pay dividends until it can replenish the legal surplus reserve to an amount of at least 20% of the original capital contributed.    
Legal Surplus Amount Additions   $ 0    
Legal surplus reserve amount   $ 97,586,000   $ 97,586,000
Series A Preferred Stock [Member]        
Class Of Stock [Line Items]        
Preferred stock dividend rate percentage   7.125%    
Series B Preferred Stock [Member]        
Class Of Stock [Line Items]        
Preferred stock dividend rate percentage   8.35%    
Series C Preferred Stock [Member]        
Class Of Stock [Line Items]        
Preferred stock dividend rate percentage   7.40%    
Series D Preferred Stock [Member]        
Class Of Stock [Line Items]        
Preferred stock dividend rate percentage   7.25%    
Series E Preferred Stock [Member]        
Class Of Stock [Line Items]        
Preferred stock dividend rate percentage   7.00%    
Common Stock [Member]        
Class Of Stock [Line Items]        
Dividneds declared   $ 10,900,000 $ 6,500,000  
Preferred Stock [Member]        
Class Of Stock [Line Items]        
Dividneds declared   $ 700,000