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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 10,059	$ 5,318	$ 20,138	$ 16,797
Available-for-sale securities:
Unrealized gains (losses) on securities available-for-sale with other-than-temporary impairment	1,287	(657)	1,182	(678)
Unrealized gain (losses) on securities available-for-sale without other-than-temporary impairment	1,628	(611)	7,450	11,868
Less: reclassification adjustment for gains realized in net income	(228)	(178)	(270)	(5,238)
Less: reclassification adjustment for credit related other-than-temporary impairments recognized in net income	942	210	942	737
Unrealized gains on available-for-sale securities in OCI	3,629	(1,236)	9,304	6,689
Reclassification adjustment for amortization in net prior service cost	164		314
Derivative securities:
Unrealized gains on derivative securities				30
Other comprehensive income (loss), before tax	3,793	(1,236)	9,617	6,719
Income tax expense related to items of other comprehensive income	(1,434)	460	(3,635)	(2,503)
Other comprehensive income, net of tax	2,359	(776)	5,982	4,216
Total comprehensive Income	$ 12,418	$ 4,542	$ 26,120	$ 21,013

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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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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Before tax amount of other than temporary impairment (OTTI) on a debt security, categorized as either available-for-sale or held-to-maturity, recognized in other comprehensive income (loss), attributable to the parent entity.

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15D

-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 Statement of Financial Accounting Standard (FAS)

-Number 130

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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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