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SECURITIES (Details 4)
4 Months Ended
Apr. 30, 2014
USD ($)
security
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Troubled Debt Restructurings      
Estimated fair value of new securities received from the security TDR exchange   $ 168,658,000 $ 262,946,000
Predecessor Company      
Troubled Debt Restructurings      
Available-for-sale securities, gross realized gain $ 2,500,000    
Available-for-sale securities, gross realized losses 0    
Predecessor Company | Equity Investments, at Estimated Fair Value      
Troubled Debt Restructurings      
Estimated fair value of new securities received from the security TDR exchange $ 16,100,000    
Number of securities modified as TDRs in default within a twelve month period subsequent to their original restructuring | security 0    
Predecessor Company | Securities Available- For-Sale      
Troubled Debt Restructurings      
Modified amortized cost of security $ 24,100,000    
Securities Available- For-Sale | Predecessor Company      
Troubled Debt Restructurings      
Other-than-temporarily impaired loss $ 4,400,000