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Securities (Details 2) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012
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Unrealized gains and losses and estimated market values of debt securities available for sale |
Amortized Cost | $ 513,392
Gross Unrealized Gains | 10,517
Gross Unrealized Losses | (203)
Estimated Market Value | 523,706
U.S. Federal agencies [Member] |
Unrealized gains and losses and estimated market values of debt securities available for sale |
Amortized Cost | 429,163
Gross Unrealized Gains | 4,126
Gross Unrealized Losses | (158)
Estimated Market Value | 433,131
Mortgage backed securities [Member] |
Unrealized gains and losses and estimated market values of debt securities available for sale |
Amortized Cost | 21,453
Gross Unrealized Gains | 939
Gross Unrealized Losses | (2)
Estimated Market Value | 22,390
States and political subdivisions [Member] |
Unrealized gains and losses and estimated market values of debt securities available for sale |
Amortized Cost | 54,631
Gross Unrealized Gains | 3,219
Gross Unrealized Losses | (21)
Estimated Market Value | 57,829
Other securities [Member] |
Unrealized gains and losses and estimated market values of debt securities available for sale |
Amortized Cost | 8,145
Gross Unrealized Gains | 2,233
Gross Unrealized Losses | (22)
Estimated Market Value | $ 10,356

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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 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. + Details
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