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Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) | Preferred Stock [Member] | Common Stock [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Total
--- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2016 | $ 0 | $ 305,488,000 | $ 40,904,000 | $ (5,581,000) | $ 340,811,000
Employee stock purchase plan |  | 12,000 |  |  | 12,000
Dividend reinvestment plan |  | 1,145,000 |  |  | 1,145,000
Stock option exercises |  | 248,000 |  |  | 248,000
Stock grant for director fees |  | 2,000 |  |  | 2,000
Stock-based compensation expense |  | 476,000 |  |  | 476,000
Cash dividends |  |  | (2,923,000) |  | (2,923,000)
Net income |  |  | 7,615,000 |  | 7,615,000
Change in net unrealized holding gain/(loss) on securities available for sale, net of tax effect |  |  |  | 637,000 | 637,000
Change in fair value of interest rate swap, net of tax effect |  |  |  | 27,000 | 27,000
Balances at Mar. 31, 2017 | 0 | 307,371,000 | 45,596,000 | (4,917,000) | 348,050,000
Balances at Dec. 31, 2017 | 0 | 309,772,000 | 61,001,000 | (4,903,000) | 365,870,000
Reclassification of equity securities related to ASU 2016-01 adoption at Dec. 31, 2017 |  |  | (42,000) | 42,000 | 0
Employee stock purchase plan |  | 14,000 |  |  | 14,000
Dividend reinvestment plan |  | 164,000 |  |  | 164,000
Stock option exercises |  | 54,000 |  |  | 54,000
Stock-based compensation expense |  | 597,000 |  |  | 597,000
Cash dividends |  |  | (3,599,000) |  | (3,599,000)
Net income |  |  | 10,881,000 |  | 10,881,000
Change in net unrealized holding gain/(loss) on securities available for sale, net of tax effect |  |  |  | (5,642,000) | (5,642,000)
Change in fair value of interest rate swap, net of tax effect |  |  |  | 1,000 | 1,000
Balances at Mar. 31, 2018 | $ 0 | $ 310,601,000 | $ 68,241,000 | $ (10,502,000) | $ 368,340,000

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- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
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