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DERIVATIVE INSTRUMENTS - Amount and Market Value of Mortgage Banking Derivatives (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Derivatives, Fair Value [Line Items]    
Notional Amount Assets $ 172,460 $ 877,695
Total included in assets 2,117 17,968
Notional Amount Liability 201,789 338,820
Total included in liabilities 1,856 2,116
Interest rate lock commitments    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 24,422 289,637
Derivative assets held in discontinued operations 841 8,317
Notional Amount Liability 0 22,945
Derivative liabilities held in discontinued operations 0 231
Mandatory forward commitments    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 77,002 537,476
Derivative assets held in discontinued operations 201 8,897
Notional Amount Liability 130,753 265,322
Derivative liabilities held in discontinued operations 762 1,212
Interest rate swaps on deposits and other borrowings    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 71,036 46,346
Derivatives asset, fair values 1,075 707
Notional Amount Liability 71,036 46,346
Derivatives liability, fair values 1,094 655
Foreign exchange contracts    
Derivatives, Fair Value [Line Items]    
Notional Amount Assets 0 4,236
Derivatives asset, fair values 0 47
Notional Amount Liability 0 4,207
Derivatives liability, fair values $ 0 $ 18