Investment Securities (Summary Of Investment Securities) (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Investments [Line Items]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ (16,633)	$ (10,460)	$ (10,460)	$ (26,320)
OTTI Charges	(7,277)	0	0
Pooled trust preferred securities [Member]
Schedule of Investments [Line Items]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	(14,022)	(10,500)
Equity securities - financial institutions [Member]
Schedule of Investments [Line Items]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	(20,400)	(21,300)
Collateralized Loan Obligations [Member]
Schedule of Investments [Line Items]
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	(2,600)
OTTI Charges	$ (2,611)	$ 0	$ 0