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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Reclassifications out of accumulated other comprehensive income |  |
Gains on investment securities available-for-sale | $ 10 | $ 0
Income before income taxes | 21,236 | 20,769
Income tax expense | (7,418) | (7,258)
Net income | 13,818 | 13,511
Unrealized gains and losses on available-for-sale securities | Amount Reclassified from Accumulated Other Comprehensive Income |  |
Reclassifications out of accumulated other comprehensive income |  |
Gains on investment securities available-for-sale | 10 | 0
Income before income taxes | 10 | 0
Income tax expense | (4) | 0
Net income | $ 6 | $ 0

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