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DERIVATIVE INSTRUMENTS - Amount and Market Value of Mortgage Banking Derivatives (Detail) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Notional Amount Assets | $ 69,090 | $ 877,695
Total included in assets | 1,112 | 17,968
Notional Amount Liability | 69,090 | 338,820
Total included in liabilities | 1,146 | 2,116
Interest rate lock commitments |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount Assets | 0 | 289,637
Derivative assets held in discontinued operations | 0 | 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 | 0 | 537,476
Derivative assets held in discontinued operations | 0 | 8,897
Notional Amount Liability | 0 | 265,322
Derivative liabilities held in discontinued operations | 0 | 1,212
Interest rate swaps on deposits and other borrowings |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount Assets | 69,090 | 46,346
Derivatives asset, fair values | 1,112 | 707
Notional Amount Liability | 69,090 | 46,346
Derivatives liability, fair values | 1,146 | 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

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