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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands | Total | Common Stock | Retained Earnings | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | ---
Beginning Balance (in shares) at Dec. 31, 2016 |  | 15,476,379 |  |
Beginning Balance at Dec. 31, 2016 | $ 391,547 | $ 156,041 | $ 249,415 | $ (13,909)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net Income | 20,310 |  | 20,310 |
Other comprehensive income, net of tax | 1,998 |  |  | 1,998
Stock-based compensation expense | 816 | $ 816 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit (shares) |  | 36,535 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings | (545) | $ (545) |  |
Cash dividends declared ($0.46 and $0.55 per share | (7,166) |  | (7,166) |
Ending Balance (in shares) at Jun. 30, 2017 |  | 15,512,914 |  |
Ending Balance at Jun. 30, 2017 | 406,960 | $ 156,312 | 262,559 | (11,911)
Beginning Balance (in shares) at Dec. 31, 2017 |  | 15,524,704 |  |
Beginning Balance at Dec. 31, 2017 | 403,413 | $ 156,904 | 266,723 | (20,214)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net Income | 25,037 |  | 25,037 |
Other comprehensive income, net of tax | (10,515) |  |  | (10,515)
Stock-based compensation expense | 1,011 | $ 1,011 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit (shares) |  | 51,545 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings | (421) | $ (421) |  |
Cash dividends declared ($0.46 and $0.55 per share | (8,586) |  | (8,586) |
Ending Balance (in shares) at Jun. 30, 2018 |  | 15,576,249.000 |  |
Ending Balance at Jun. 30, 2018 | $ 409,939 | $ 157,494 | 283,372 | (30,927)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Cumulative-effect adjustment (Note 2) |  |  | $ 198 | $ (198)

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