Fair Value (Fair Value Of Financial Instruments) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2009
Cash and money market instruments, Carrying value	$ 217,116	$ 133,780	$ 201,545	$ 159,091
Cash and money market instruments, Fair value	217,116	133,780
Investment securities, Carrying value	1,892,708	1,971,092
Investment securities, Fair value	1,903,619	1,983,636
Accrued interest receivable, Carrying value	22,624	24,137
Accrued interest receivable, Fair value	22,624	24,137
Mortgage loans held for sale, carrying value	7,456	8,340
Mortgage loans held for sale, Fair value	7,456	8,340
Impaired loans carried at fair value, Carrying Value	97,608	111,257
Impaired loans carried at fair value, Fair value	97,608	111,257
Other loans, Carrying value	4,495,262	4,491,691
Other loans, Fair value	4,507,242	4,511,419
Net loans	4,600,326	4,611,288
Net loans, Fair value	4,612,306	4,631,016
Noninterest bearing checking accounts, Carrying value	984,160	937,719
Noninterest bearing checking accounts, Fair value	984,160	937,719
Interest bearing transactions accounts, Carrying value	1,485,383	1,283,159
Interest bearing transactions accounts, Fair value	1,485,383	1,283,159
Savings accounts, Carrying value	950,777	899,288
Savings accounts, Fair value	950,777	899,288
Time deposits, Carrying value	1,832,992	1,973,903
Time deposits, Fair value	1,843,327	1,990,163
Other, Carrying value	4,205	1,351
Other, Fair value	4,205	1,351
Total deposits	5,257,517	5,095,420
Total deposits , Fair value	5,267,852	5,111,680
Short-term borrowings, Carrying value	234,112	663,669
Short-term borrowings, Fair value	234,112	663,669
Long-term debt, Carrying value	821,202	636,733
Long-term debt, Fair value	889,068	699,080
Subordinated debentures/notes, Carrying value	75,250	75,250
Subordinated debentures/notes, Fair value	66,681	63,099
Accrued interest payable, Carrying value	5,732	6,123
Accrued interest payable, Fair value	5,732	6,123
Fair Value Swap [Member]
Interest rate swap, Carrying value	1,338	1,634
Swap, Fair value	1,338	1,634
Interest Rate Swap [Member]
Fair value swap, Carrying value	200	60
Swap, Fair value	$ 200	$ 60

Accrued Interest Payable Fair Value

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Accrued Interest Receivable At Fair Value

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Fair Value Swap Carrying Value

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Impaired Loan Fair Value

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Impaired Loans Carried at Fair Value Carrying Value

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Interest Bearing Deposit Liabilities Fair Value

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Interest Bearing Domestic Deposit Savings Fair Value

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Interest Bearing Transactions Accounts Carrying Value

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Interest Rate Swap Carrying Value

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Loans And Leases Receivable Not Carried At Fair Value

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Noninterest Bearing Checking Accounts Carrying Value

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Noninterest Bearing Deposit Liabilities Fair Value

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Other Deposits Carrying Value

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Other Loan Receivable At Fair Value

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Short Term Borrowings Fair Value

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Subordinated Debt Fair Value

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Time Deposits Fair Value

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Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

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Amount of accrued but unpaid interest on deposit liabilities.

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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Amount of interest-bearing domestic savings deposit liabilities. Saving deposits bear interest and have no stated maturity.

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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Reflects the aggregate carrying amount of all categories of loans and leases held in portfolio, net of unearned income and the allowance for losses on loans and leases.

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-Name Statement of Financial Accounting Standard (FAS)
-Number 114
-Paragraph 4
-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Loan
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/extlink&oid=6517073

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap
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Balance Type:	credit
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- Definition

Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19
-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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 02
-Subsection 19, 20, 22

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 10
-Section F

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Balance Type:	credit
Period Type:	instant

- Definition

The aggregate amount of time deposits, including certificates of deposits, individual retirement accounts and open accounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 12
-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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