DEPOSITS - Brokered Certificates Of Deposit Mature (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	$ 2,572,483	$ 2,887,046
One to ninety days
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	362,501
Over three month to six months
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	577,737
Over six months to one year
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	832,235
One to three year
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	745,922
Three to five years
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	18,037
Over five years
Deposits [Line Items]
Interest Bearing Domestic Deposit Brokered	$ 36,051