Loans And Leases (Summary Of The Recorded Investment Of Company's TDRs) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013		Dec. 31, 2012
Loans and Leases Receivable Disclosure [Abstract]
Accrual status	$ 272,922		$ 288,578
Non-accrual status	118,208		115,583
Total recorded investment	391,130		404,161
Accruing TDRs performing under modified terms more than one year	57.40%		60.20%
TDR specific reserves included in the balance of allowance for loan and lease losses	21,882		27,317
Additional funds committed to borrowers in TDR status	$ 5,854	[1]	$ 3,263	[1]

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