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Disclosures about fair value of assets and liabilities (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Realized gains and losses included in net income for the periods in the condensed consolidated statements of income |  |  |  |  |
Included in net income |  |  | $ (408) | $ 280 |
Hedged loans [Member] |  |  |  |  |
Realized gains and losses included in net income for the periods in the condensed consolidated statements of income |  |  |  |  |
Included in net income | (1,444) | 298 | (1,846) | 224 | (74)
Fair value interest rate swap agreements [Member] |  |  |  |  |
Realized gains and losses included in net income for the periods in the condensed consolidated statements of income |  |  |  |  |
Included in net income | 1,444 | (298) | 1,846 | (224) |
Derivative loan commitments [Member] |  |  |  |  |
Realized gains and losses included in net income for the periods in the condensed consolidated statements of income |  |  |  |  |
Included in net income | (396) | 503 | (408) | 280 |
Non Interest Income [Member] |  |  |  |  |
Realized gains and losses included in net income for the periods in the condensed consolidated statements of income |  |  |  |  |
Included in net income | $ (396) | $ 503 |  |  |

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- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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