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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Retained Earnings | Other Cumulative Comprehensive Loss | Treasury Stock and Company Stock Held for Deferred Compensation
--- | --- | --- | --- | --- | --- | ---
Balances (in shares) at Dec. 31, 2017 |  | 14,821,801 |  |  |  | 39,783
Balances at Dec. 31, 2017 | $ 105,780 | $ 741 | $ 76,146 | $ 60,074 | $ (30,819) | $ (362)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 10,292 |  |  | 10,292 |  |
Change in cumulative foreign currency translation adjustment | (2,751) |  |  |  | (2,751) |
Shares issued in connection with stock compensation plans (in shares) |  | 151,378 |  |  |  |
Shares issued in connection with stock compensation plans | 232 | $ 8 | 224 |  |  |
Stock-based compensation | 1,719 |  | 1,719 |  |  |
Dividends declared | (595) |  |  | (595) |  |
Treasury stock activity and transfers of stock to rabbi trust | (383) |  |  |  |  | $ (383)
Treasury stock purchases (in shares) |  |  |  |  |  | (33,669)
Balances (in shares) at Jun. 30, 2018 |  | 14,973,179 |  |  |  | 73,452
Balances at Jun. 30, 2018 | 114,229 | $ 749 | 78,089 | 69,706 | (33,570) | $ (745)
Balances (in shares) at Mar. 31, 2018 |  | 14,948,294 |  |  |  | 72,104
Balances at Mar. 31, 2018 | 111,357 | $ 747 | 76,895 | 63,634 | (29,214) | $ (705)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 6,372 |  |  | 6,372 |  |
Change in cumulative foreign currency translation adjustment | (4,356) |  |  |  | (4,356) |
Shares issued in connection with stock compensation plans (in shares) |  | 24,885 |  |  |  |
Shares issued in connection with stock compensation plans | 232 | $ 2 | 230 |  |  |
Stock-based compensation | 964 |  | 964 |  |  |
Dividends declared | (300) |  |  | (300) |  |
Treasury stock activity and transfers of stock to rabbi trust | (40) |  |  |  |  | $ (40)
Treasury stock purchases (in shares) |  |  |  |  |  | (1,348)
Balances (in shares) at Jun. 30, 2018 |  | 14,973,179 |  |  |  | 73,452
Balances at Jun. 30, 2018 | 114,229 | $ 749 | 78,089 | 69,706 | (33,570) | $ (745)
Balances (in shares) at Dec. 31, 2018 |  | 14,987,962 |  |  |  | 82,186
Balances at Dec. 31, 2018 | 134,286 | $ 749 | 80,077 | 89,291 | (35,014) | $ (817)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 32,414 |  |  | 32,414 |  |
Change in cumulative foreign currency translation adjustment | 1,119 |  |  |  | 1,119 |
Shares issued in connection with stock compensation plans (in shares) |  | 119,952 |  |  |  | 7,502
Shares issued in connection with stock compensation plans | 358 | $ 7 | 351 |  |  |
Stock-based compensation | 2,411 |  | 2,411 |  |  |
Dividends declared | (598) |  |  | (598) |  |
Treasury stock activity and transfers of stock to rabbi trust | (6,489) |  | 14 |  |  | $ (6,503)
Treasury stock purchases (in shares) |  |  |  |  |  | (386,139)
Balances (in shares) at Jun. 30, 2019 |  | 15,107,914 |  |  |  | 460,823
Balances at Jun. 30, 2019 | 163,501 | $ 756 | 82,853 | 121,107 | (33,895) | $ (7,320)
Balances (in shares) at Mar. 31, 2019 |  | 15,089,080 |  |  |  | 103,384
Balances at Mar. 31, 2019 | 148,911 | $ 755 | 81,122 | 104,162 | (35,433) | $ (1,695)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 17,244 |  |  | 17,244 |  |
Change in cumulative foreign currency translation adjustment | 1,538 |  |  |  | 1,538 |
Shares issued in connection with stock compensation plans (in shares) |  | 18,834 |  |  |  |
Shares issued in connection with stock compensation plans | 358 | $ 1 | 357 |  |  |
Stock-based compensation | 1,360 |  | 1,360 |  |  |
Dividends declared | (299) |  |  | (299) |  |
Treasury stock activity and transfers of stock to rabbi trust | (5,611) |  | 14 |  |  | $ (5,625)
Treasury stock purchases (in shares) |  |  |  |  |  | (357,439)
Balances (in shares) at Jun. 30, 2019 |  | 15,107,914 |  |  |  | 460,823
Balances at Jun. 30, 2019 | $ 163,501 | $ 756 | $ 82,853 | $ 121,107 | $ (33,895) | $ (7,320)

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