Investment Securities (Available For Sale Securities With Gross Unrealized Losses By Investment Category And Length Of Time Individual Securities Have Been In Continuous Loss Position) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Investments, Unrealized Loss Position [Line Items]
Securities available for sale, Continuous loss position less than twelve months, fair value	$ 70,686
Securities available for sale, Continuous loss position more than twelve months, fair value	336
Securities available for sale, Continuous loss position	71,022
Securities available for sale, Continuous loss position less than twelve months, gross unrealized losses	2,422
Securities available for sale, Continuous loss position more than twelve months, gross unrealized losses	26
Securities available for sale, Continuous loss position, gross unrealized losses	2,448
Securities available for sale, Continuous loss position less than twelve months, number of investment positions	61
Securities available for sale, Continuous loss position more than twelve months, number of investment positions	2
Securities available for sale, Number of Investment Positions	63
Securities available for maturity, Continuous loss position less than twelve months, gross unrealized losses	46
Securities available for maturity, Continuous loss position more than twelve months, fair value	4,556
Securities available for maturity, Number of Investment Positions	3
Agency bonds and notes
Investments, Unrealized Loss Position [Line Items]
Securities available for sale, Continuous loss position less than twelve months, fair value	13,114
Securities available for sale, Continuous loss position less than twelve months, gross unrealized losses	553
Securities available for sale, Continuous loss position less than twelve months, number of investment positions	6
Agency mortgage backed
Investments, Unrealized Loss Position [Line Items]
Securities available for sale, Continuous loss position less than twelve months, fair value	22,254
Securities available for sale, Continuous loss position less than twelve months, gross unrealized losses	329
Securities available for sale, Continuous loss position less than twelve months, number of investment positions	13
Agency CMO
Investments, Unrealized Loss Position [Line Items]
Securities available for sale, Continuous loss position less than twelve months, fair value	13,402
Securities available for sale, Continuous loss position less than twelve months, gross unrealized losses	295
Securities available for sale, Continuous loss position less than twelve months, number of investment positions	5
Municipal
Investments, Unrealized Loss Position [Line Items]
Securities available for sale, Continuous loss position less than twelve months, fair value	21,916
Securities available for sale, Continuous loss position more than twelve months, fair value	225
Securities available for sale, Continuous loss position less than twelve months, gross unrealized losses	1,245
Securities available for sale, Continuous loss position more than twelve months, gross unrealized losses	25
Securities available for sale, Continuous loss position less than twelve months, number of investment positions	37
Securities available for sale, Continuous loss position more than twelve months, number of investment positions	1
Securities available for maturity, Continuous loss position less than twelve months, gross unrealized losses	46
Securities available for maturity, Continuous loss position more than twelve months, fair value	4,556
Securities available for maturity, Number of Investment Positions	3
Privately-issued ABS
Investments, Unrealized Loss Position [Line Items]
Securities available for sale, Continuous loss position more than twelve months, fair value	111
Securities available for sale, Continuous loss position more than twelve months, gross unrealized losses	$ 1
Securities available for sale, Continuous loss position more than twelve months, number of investment positions	1