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RISK MANAGEMENT AND DERIVATIVE INSTRUMENTS - Amount and Market Value of Mortgage Banking Derivatives (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Interest rate swaps on deposits and other borrowings    
Derivatives, Fair Value [Line Items]    
Derivatives asset, fair values $ 918  
Other Assets    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 783,342 $ 205,658
Derivatives asset, fair values 9,042 6,379
Other Assets | Interest rate lock commitments    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 262,135 179,923
Derivatives asset, fair values 7,343 5,750
Other Assets | Mandatory forward commitments    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 468,740 25,735
Derivatives asset, fair values 1,130 629
Other Assets | Interest rate swaps on deposits and other borrowings    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 25,000 0
Derivatives asset, fair values 331 0
Other Assets | Interest rate swaps and cap on loans with customers    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 27,467 0
Derivatives asset, fair values 238 0
Accrued Expenses and Other Liabilities    
Derivatives, Fair Value [Line Items]    
Notional Amount Liability 309,529 424,904
Derivatives liability, fair values 1,067 3,235
Accrued Expenses and Other Liabilities | Interest rate lock commitments    
Derivatives, Fair Value [Line Items]    
Notional Amount Liability 16,790 10,075
Derivatives liability, fair values 88 197
Accrued Expenses and Other Liabilities | Mandatory forward commitments    
Derivatives, Fair Value [Line Items]    
Notional Amount Liability 215,272 364,829
Derivatives liability, fair values 300 2,803
Accrued Expenses and Other Liabilities | Interest rate swaps on deposits and other borrowings    
Derivatives, Fair Value [Line Items]    
Notional Amount Liability 50,000 50,000
Derivatives liability, fair values 441 235
Accrued Expenses and Other Liabilities | Interest rate swaps and caps on loans with correspondent bank    
Derivatives, Fair Value [Line Items]    
Notional Amount Liability 27,467 0
Derivatives liability, fair values $ 238 $ 0