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BORROWINGS - Additional Information (Detail)
6 Months Ended
May 01, 2017
USD ($)
Jun. 30, 2017
USD ($)
Trust
Dec. 31, 2016
Debt Instrument [Line Items]      
Number of unconsolidated subsidiary trusts | Trust   6  
Percent of the common equity of each Trust owned by the Corporation   100.00%  
Yadkin Financial Corporation (YDKN) [Member]      
Debt Instrument [Line Items]      
Subordinate debt repaid $ 7,500,000    
FHLB [Member]      
Debt Instrument [Line Items]      
Credit available with FHLB   $ 7,844,000,000  
Credit with FHLB utilized   $ 2,900,000,000  
Federal Home Loan Bank advances are scheduled to mature periodically through the year   2021  
Omega Financial Capital Trust I [Member]      
Debt Instrument [Line Items]      
Redemption of Corporation Issued TPS   $ 10,000,000  
Minimum [Member] | FHLB [Member]      
Debt Instrument [Line Items]      
Effective interest rates   1.11% 0.95%
Maximum [Member] | FHLB [Member]      
Debt Instrument [Line Items]      
Effective interest rates   4.19% 4.19%