DEPOSITS - Brokered Certificates Of Deposit Mature (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	$ 1,558,508	$ 2,097,483
One to ninety days
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	343,396
Over three month to six months
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	255,574
Over six months to one year
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	350,362
One to three year
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	524,386
Three to five years
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	84,605
Over five years
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	$ 185