Loans Receivable (Schedule Of Non-Covered Loans On Nonaccrual Status) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 47,543	$ 54,454
Residential Mortgage Loans [Member] | Mortgage - Prime [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	5,926	4,910
Commercial Loans [Member] | Commercial Real Estate-Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	2,114	2,582
Commercial Loans [Member] | Commercial Real Estate-Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	28,422	33,451
Commercial Loans [Member] | Business [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	2,824	6,622
Consumer And Other Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	867	994
Consumer And Other Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	6,462	4,873
Consumer And Other Loans [Member] | Credit Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	372	403
Consumer And Other Loans [Member] | Consumer - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans on nonaccrual status	$ 556	$ 619