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STOCKHOLDERS' EQUITY - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2017
Sep. 30, 2018
Sep. 30, 2017
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 220,382,343 221,789,509  
Common stock, shares outstanding 216,278,040 217,240,844  
Corporation has authorized shares of preferred stock 50,000,000 50,000,000  
Preferred stock, par value $ 1 $ 1  
Liquidation value per share   $ 25  
Repurchased of common stock   433,362 336,985
Stock repurchase plan treasury stock 4,104,303 4,548,665  
Legal surplus reserve rate   10.00%  
Original amount contributed in percentage   20.00%  
Legal Surplus Amount Additions $ 7,300 $ 0  
Legal surplus reserve amount $ 59,693 $ 59,693  
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%