Loans (Schedule Of Components Of Loans In The Consolidated Balance Sheets) (Details) (USD $)	9 Months Ended	12 Months Ended
Sep. 30, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 7,017,142,000	$ 6,868,621,000
Allowance for loan losses	(209,116,000)	(245,231,000)
Unamortized deferred loan fees	(8,360,000)	(7,621,000)
Total loans, net	6,799,666,000	6,615,769,000
Loans held for sale	1,276,000	2,873,000
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,821,059,000	1,441,167,000
Loans held for sale	776,000
Real Estate Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	249,003,000	409,986,000
Commercial Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,748,524,000	3,940,061,000
Residential Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	967,396,000	852,454,000
Equity Lines [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	215,315,000	208,876,000
Installment And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 15,845,000	$ 16,077,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Reflects the net amount of other additions and reductions in the reserve for credit losses.

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- Definition

Reflects the aggregate gross carrying amount of all categories of loans and leases held in portfolio, prior to deducting deferred income and the allowance for losses on loans and leases.

+ References

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-Publisher AICPA

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- Definition

The face amount of loans that will be sold to other entities.

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Total of loans held-for-sale and held-in-portfolio net of unearned income, allowance for loan and lease losses, if any, unamortized loan origination and other fees and costs, and purchased premiums or discounts.

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Reflects the cumulative amount of fees paid by borrowers which have not yet been taken into income and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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