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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Common Stock | Additional Paid-In Capital | Retained Earnings | Treasury Stock | Accumulated Other Comprehensive Loss | Total
--- | --- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2014 | $ 277 | $ 303,045 | $ 338,810 | $ (57,770) | $ (23,479) | $ 560,883
Balances (in shares) at Dec. 31, 2014 | 27,722 |  |  | 1,678 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income |  |  | 44,854 |  |  | 44,854
Other comprehensive income (loss), net of tax |  |  |  |  | (4,017) | (4,017)
Issuance of common stock under share-based compensation plans | $ 2 | (2) |  |  |  |
Issuance of common stock under share-based compensation plans (in shares) | 216 |  |  |  |  |
Tax effect of share-based compensation plans |  | (1,419) |  |  |  | (1,419)
Share-based compensation expense |  | 8,029 |  |  |  | 8,029
Purchase of treasury stock |  |  |  | $ (12,765) |  | (12,765)
Purchase of treasury stock (in shares) |  |  |  | 402 |  |
Dividends declared on common stock |  |  | (6,837) |  |  | (6,837)
Balances at Dec. 31, 2015 | $ 279 | 309,653 | 376,827 | $ (70,535) | (27,496) | 588,728
Balances (in shares) at Dec. 31, 2015 | 27,938 |  |  | 2,080 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income |  |  | 18,652 |  |  | 18,652
Other comprehensive income (loss), net of tax |  |  |  |  | 4,079 | 4,079
Issuance of common stock under share-based compensation plans | $ 3 | (3) |  |  |  |
Issuance of common stock under share-based compensation plans (in shares) | 236 |  |  |  |  |
Tax effect of share-based compensation plans |  | (2,322) |  |  |  | (2,322)
Share-based compensation expense |  | 7,588 |  |  |  | 7,588
Purchase of treasury stock |  |  |  | $ (9,510) |  | (9,510)
Purchase of treasury stock (in shares) |  |  |  | 485 |  |
Dividends declared on common stock |  |  | (8,318) |  |  | (8,318)
Balances at Dec. 31, 2016 | $ 282 | 315,318 | 386,917 | $ (80,045) | (23,417) | 599,055
Balances (in shares) at Dec. 31, 2016 | 28,174 |  |  | 2,565 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Cumulative effect of change in accounting principle (see Note B) | Adjustment | ASC Topic 718, Compensation – Stock Compensation |  | 402 | (244) |  |  | 158
Net income |  |  | 59,726 |  |  | 59,726
Other comprehensive income (loss), net of tax |  |  |  |  | 2,843 | 2,843
Issuance of common stock under share-based compensation plans | $ 3 | (3) |  |  |  |
Issuance of common stock under share-based compensation plans (in shares) | 322 |  |  |  |  |
Tax effect of share-based compensation plans |  | (2,837) |  |  |  | (2,837)
Share-based compensation expense |  | 6,958 |  |  |  | 6,958
Purchase of treasury stock |  |  |  | $ (6,019) |  | (6,019)
Purchase of treasury stock (in shares) |  |  |  | 287 |  |
Dividends declared on common stock |  |  | (8,264) |  |  | (8,264)
Balances at Dec. 31, 2017 | $ 285 | $ 319,436 | $ 438,379 | $ (86,064) | $ (20,574) | $ 651,462
Balances (in shares) at Dec. 31, 2017 | 28,496 |  |  | 2,852 |  |

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