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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive (Loss) Income [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 |  | $ 412,726 | $ 11,407 | $ 126,462 | $ (16,717) | $ (2,846) | $ 531,032
Net income |  |  |  | 19,563 |  |  | 19,563
Other comprehensive loss, net of tax |  |  |  |  |  | (365) | (365)
Cash dividends declared on common stock ($0.150 per share) |  |  |  | (4,847) |  |  | (4,847)
Stock issuance costs |  | (180) |  |  |  |  | (180)
Exercise of stock options (10,846 and 46,497 shares) |  |  | 118 |  |  |  | 118
Restricted stock grants (56,164 and 23,018 shares) |  |  |  |  |  |  |
Stock-based compensation expense |  |  | 852 |  |  |  | 852
Balance at Jun. 30, 2017 |  | 412,546 | 12,377 | 141,178 | (16,717) | (3,211) | 546,173
Balance at Dec. 31, 2017 |  | 412,546 | 13,602 | 160,025 | (16,717) | (4,019) | 565,437
Reclassification of stranded tax effects (ASU 2018-02) (see Note 8) |  |  |  | 709 |  | (709) |
Cumulative effect of adopting ASU 2016-01 (see Note 8) |  |  |  | (55) |  | 55 |
Net income |  |  |  | 21,778 |  |  | 21,778
Other comprehensive loss, net of tax |  |  |  |  |  | (3,974) | (3,974)
Cash dividends declared on common stock ($0.150 per share) |  |  |  | (4,838) |  |  | (4,838)
Stock issuance costs |  |  |  |  |  |  |
Exercise of stock options (10,846 and 46,497 shares) |  |  | 252 |  |  |  | 252
Restricted stock grants (56,164 and 23,018 shares) |  |  |  |  |  |  |
Net performance units issued (42,672 shares) |  |  | (819) |  |  |  | (819)
Stock-based compensation expense |  |  | 721 |  |  |  | 721
Balance at Jun. 30, 2018 |  | $ 412,546 | $ 13,756 | $ 177,619 | $ (16,717) | $ (8,647) | $ 578,557

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