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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012
Consolidated Statement of Comprehensive Income [Abstract] |  |
Unrealized gain on interest rate swaps, tax | $ (6) |
Reclassification adjustment for losses recognized in earnings, net of tax | (34) | (33)
Unrealized losses on other-than-temporarily impaired securities available for sale arising during the period, net of tax | 15 |
Unrealized losses on other securities available for sale arising during the period, net of tax | 865 | 647
Reclassification adjustment for realized gains included in net income, net of tax | $ 27 | $ 198

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