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Fair Value Measurements (Additional Information About Assets Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	$ 11,603	$ 17,594
Total gains (losses) - realized/unrealized, Included in earnings		(85)
Total gains (losses) - realized/unrealized, Included in other comprehensive income	197	188
Accretion included in earnings	728
Purchases	21,829
Issuances
Sales/redemptions		(6,094)
Settlements	(808)
Transfers from Level 3
Transfers into Level 3
Balance at end of period	33,549	11,603
Pooled Trust Preferred Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	5,998	5,974
Total gains (losses) - realized/unrealized, Included in earnings		(37)
Total gains (losses) - realized/unrealized, Included in other comprehensive income	(130)	61
Accretion included in earnings	717
Purchases	16,569
Issuances
Settlements	(349)
Transfers from Level 3
Transfers into Level 3
Balance at end of period	22,805	5,998
Other Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	5,197	11,245
Total gains (losses) - realized/unrealized, Included in earnings		(48)
Total gains (losses) - realized/unrealized, Included in other comprehensive income	331	94
Accretion included in earnings	3
Purchases	954
Issuances
Sales/redemptions		(6,094)
Settlements
Transfers from Level 3
Transfers into Level 3
Balance at end of period	6,485	5,197
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	408	375
Total gains (losses) - realized/unrealized, Included in other comprehensive income	38	33
Accretion included in earnings
Purchases
Issuances
Settlements
Transfers from Level 3
Transfers into Level 3
Balance at end of period	446	408
Residential Non-Agency Collateralized Mortgage Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total gains (losses) - realized/unrealized, Included in other comprehensive income	(42)
Accretion included in earnings	8
Purchases	4,306
Issuances
Settlements	(459)
Transfers from Level 3
Transfers into Level 3
Balance at end of period	$ 3,813

X

- Definition

Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset, accretion included in earnings.

+ References

No definition available.

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- Definition

This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(1)

-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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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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- Definition

This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity).

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c(1)

-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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- Definition

Issues that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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Purchases that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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Sales that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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Transfers into assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period.

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Transfers out of assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period.

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- Definition

This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c

-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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