Loans And Leases (Summary Of The Recorded Investment Of Company's TDRs) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Loans and Leases Receivable Disclosure [Abstract]
Accrual status	$ 288,578		$ 367,344
Non-accrual status	115,583		76,968
Total recorded investment	404,161		444,312
Accruing TDRs performing under modified terms more than one year	60.20%		76.00%
TDR specific reserves included in the balance of allowance for loan and lease losses	27,317		44,847
Additional funds committed to borrowers in TDR status	$ 3,263	[1]	$ 7,872	[1]

[1] This amount may be limited by contractual rights and/or the underlying collateral supporting the loan or lease.