Loans And Leases (Summary Of The Recorded Investment Of Company's TDRs) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Total recorded investment of TDRs	$ 320,170		$ 341,898
TDR Loans Performing under modified terms For More Than One Year percentage	67.60%		58.20%
Allowance For Loan And Lease Losses Related To TDR's	23,785		20,360
Additional funds committed to borrowers in TDR status	552		1,262
Accruing TDR [Member]
Financing Receivable, Impaired [Line Items]
Total recorded investment of TDRs	243,231	[1]	238,926	[1]
Non Accrual TDR [Member]
Financing Receivable, Impaired [Line Items]
Total recorded investment of TDRs	76,939	[1]	102,972	[1]
Residential TDR CH 7 Accruing [Member]
Financing Receivable, Impaired [Line Items]
Total recorded investment of TDRs	$ 17,600

[1] A total of $17.6 million in residential and consumer loans was reclassified from non-accrual to accrual status in the twelve months ended December 31, 2014 as a result of updated regulatory guidance issued in the first quarter of 2014.