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Investment Securities (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Available-for-sale securities, Amortized Cost | $ 139,303 | $ 142,333
Available-for-sale securities, Gross Unrealized Gains | 3,113 | 3,392
Available-for-sale securities, Gross Unrealized Losses | 178 | 217
Available-for-sale securities, Estimated Fair Value | 142,238 | 145,508
Held-to-maturity securities, Amortized Cost | 2,594 | 2,657
Held-to-maturity securities, Gross Unrealized Gains | 226 | 227
Held-to-maturity securities, Gross Unrealized Losses | 0 | 0
Held-to-maturity securities, Estimated Fair Value | 2,820 | 2,884
US Government Corporations and Agencies Securities [Member] |  |
Available-for-sale securities, Amortized Cost | 37,629 | 35,213
Available-for-sale securities, Gross Unrealized Gains | 828 | 903
Available-for-sale securities, Gross Unrealized Losses | 4 | 9
Available-for-sale securities, Estimated Fair Value | 38,453 | 36,107
Collateralized Mortgage Backed Securities [Member] |  |
Available-for-sale securities, Amortized Cost | 101,074 | 106,524
Available-for-sale securities, Gross Unrealized Gains | 2,261 | 2,464
Available-for-sale securities, Gross Unrealized Losses | 174 | 208
Available-for-sale securities, Estimated Fair Value | 103,161 | 108,780
Equity Securities [Member] |  |
Available-for-sale securities, Amortized Cost | 600 | 596
Available-for-sale securities, Gross Unrealized Gains | 24 | 25
Available-for-sale securities, Gross Unrealized Losses | 0 | 0
Available-for-sale securities, Estimated Fair Value | 624 | 621
Held-to-maturity securities, Amortized Cost | 0 |
Held-to-maturity securities, Estimated Fair Value | $ 0 |

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- Definition This item represents the cost of debt 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 No definition available. + Details
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- Definition 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 represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph b -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 -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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- Definition For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity. + 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 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section A -Paragraph 5 -Chapter 3 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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