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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, 2015 | [1] |  | 15,330,717 |  |
Beginning Balance at Dec. 31, 2015 |  | $ 363,190 | $ 153,083 | $ 222,329 | $ (12,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock Issued During Period, Shares, Stock Splits | [2] |  | (173) |  |
Stockholders' Equity Note, Stock Split, Reduction of Capital | [2] | (5) | $ (5) |  |
Net Income |  | 29,165 |  | 29,165 |
Other comprehensive income, net of tax |  | 8,047 |  |  | 8,047
Stock-based compensation expense |  | 1,521 | $ 1,521 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit (shares) | [1] |  | 104,312 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings |  | 593 | $ 593 |  |
Cash dividends declared ($0.40 and $0.46 per share in six months ended June 30, 2016 and June 30, 2017) | [1] | (9,330) |  | (9,330) |
Ending Balance (in shares) at Sep. 30, 2016 | [1] |  | 15,434,856 |  |
Ending Balance at Sep. 30, 2016 |  | 393,181 | $ 155,264 | 242,092 | (4,175)
Beginning Balance (in shares) at Dec. 31, 2015 | [1] |  | 15,330,717 |  |
Beginning Balance at Dec. 31, 2015 |  | 363,190 | $ 153,083 | 222,329 | (12,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cumulative effect adjustment(2) | [3] | 0 | $ 72 | (72) |
Ending Balance (in shares) at Dec. 31, 2016 | [1] |  | 15,476,379 |  |
Ending Balance at Dec. 31, 2016 |  | 391,547 | $ 156,041 | 249,415 | (13,909)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income |  | 31,649 |  |  |
Other comprehensive income, net of tax |  | 1,398 |  |  | 1,398
Stock-based compensation expense |  | 1,135 | $ 1,135 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit (shares) | [1] |  | 39,198 |  |
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings |  | (615) | $ (615) |  |
Cash dividends declared ($0.40 and $0.46 per share in six months ended June 30, 2016 and June 30, 2017) | [1] | (10,748) |  | (10,748) |
Ending Balance (in shares) at Sep. 30, 2017 | [1] |  | 15,515,577.000 |  |
Ending Balance at Sep. 30, 2017 |  | $ 414,366 | $ 156,561 | $ 270,316 | $ (12,511)
[1] | (1) Share and per share amounts as of December 31, 2015 have been adjusted to reflect the three-for-two stock split effective September 30, 2016.
[2] | (3)In the third quarter of 2016, the Company paid shareholders cash in-lieu of fractional shares of common stock in connection with the three-for-two stock split effective September 30, 2016.
[3] | (2)In the second quarter of 2016, the Company adopted ASU 2016-09, effective January 1, 2016. The Company made a policy election to not estimate the forfeiture rate in the accounting for share-based compensation on its unvested share-based awards. The change in policy was accounted for on a modified-retrospective basis and represents the cumulative effect adjustment to shareholders' equity.

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