Investment Securities (Summary Of Sale Proceeds Of Available For Sale Securities) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Schedule of Investments [Line Items]
Available for sale	$ 24,750	$ 45,855	$ 36,521	$ 45,855
Agency Securities [Member]
Schedule of Investments [Line Items]
Available for sale	0	28,498	0	28,498
Agency MBS [Member]
Schedule of Investments [Line Items]
Available for sale	0	0	11,771	0
CMBS [Member]
Schedule of Investments [Line Items]
Available for sale	24,750	16,284	24,750	16,284
Equity securities [Member]
Schedule of Investments [Line Items]
Available for sale	$ 0	$ 1,073	$ 0	$ 1,073