DERIVATIVE INSTRUMENTS - Amount and Market Value of Mortgage Banking Derivatives (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Notional Amount Assets	$ 438,000	$ 877,695
Total included in assets	11,065	17,968
Notional Amount Liability	674,473	338,820
Total included in liabilities	4,086	2,116
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Notional Amount Assets	300,226	289,637
Derivative assets held in discontinued operations	9,813	8,317
Notional Amount Liability	12,311	22,945
Derivative liabilities held in discontinued operations	81	231
Mandatory forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount Assets	69,607	537,476
Derivative assets held in discontinued operations	153	8,897
Notional Amount Liability	593,995	265,322
Derivative liabilities held in discontinued operations	2,909	1,212
Interest rate swaps on deposits and other borrowings
Derivatives, Fair Value [Line Items]
Notional Amount Assets	68,167	46,346
Derivatives asset, fair values	1,099	707
Notional Amount Liability	68,167	46,346
Derivatives liability, fair values	1,096	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