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Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 7,141	$ 6,001
Other comprehensive (loss) income, before tax Available-for-sale securities:
Unrealized (losses) gains on securities available-for-sale with other-than-temporary impairment	(197)	209
Unrealized (losses) gains on securities available-for-sale without other-than-temporary impairment	(1,121)	495
Less: reclassification adjustment for gains realized in net income	(117)	(51)
Unrealized (losses) gains on available-for-sale securities in OCI	(1,435)	653
Benefit plans:
Net actuarial losses on pension and other postretirement benefit plans	(394)	(22)
Amortization of prior service cost, transition asset/obligation, and net actuarial losses included in net periodic benefit cost	81	65
Unrealized (losses) gains on benefit plans	(313)	43
Other comprehensive (loss) income, before tax	(1,748)	696
Income tax benefit (expense) related to items of OCI	653	(263)
Net comprehensive loss	(1,095)	433
Total comprehensive income	$ 6,046	$ 6,434

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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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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.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Paragraph 17

-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.

+ Details

Name:	us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration