DEPOSITS - Brokered Certificates Of Deposit Mature (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	$ 2,006,313	$ 2,097,483
One to ninety days
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	254,484
Over three month to six months
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	379,095
Over six months to one year
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	612,755
One to three year
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	700,558
Three to five years
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	58,719
Over five years
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	$ 702