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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Preferred Stock | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Common Stock Held in Treasury
--- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period (shares) at Dec. 31, 2014 |  | 0 | 39,708 |  |  |  | 11,200
Balance at beginning of period (value) at Dec. 31, 2014 | $ 434,441 | $ 0 | $ 397 | $ 188,062 | $ 582,894 | $ (40,278) | $ (296,634)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Shares issued under share-based compensation plan (shares) |  |  | 5 |  |  |  |
Shares issued under share-based compensation plan (value) | 0 |  | $ 0 |  |  |  |
Exercise of stock options (shares) |  |  | 145 |  |  |  |
Exercise of stock options (value) | 2,901 |  | $ 2 | 2,899 |  |  |
Income tax benefit from exercise of stock options and warrants (value) | 1,617 |  |  | 1,617 |  |  |
Share-based compensation expense (value) | 700 |  |  | 700 |  |  |
Net income | 16,788 |  |  |  | 16,788 |  |
Currency translation adjustment | (6,999) |  |  |  |  | (6,999) |
Repurchases of treasury stock (shares) |  |  |  |  |  |  | 336
Repurchases of treasury stock (value) | (16,974) |  |  |  |  |  | $ (16,974)
Balance at end of period (shares) at Mar. 31, 2015 |  | 0 | 39,858 |  |  |  | 11,536
Balance at end of period (value) at Mar. 31, 2015 | 432,474 | $ 0 | $ 399 | 193,278 | 599,682 | (47,277) | $ (313,608)
Balance at beginning of period (shares) at Dec. 31, 2015 |  | 0 | 40,288 |  |  |  | 12,052
Balance at beginning of period (value) at Dec. 31, 2015 | 431,382 | $ 0 | $ 403 | 202,393 | 643,604 | (78,410) | $ (336,608)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Shares issued under share-based compensation plan (shares) |  |  | 7 |  |  |  |
Shares issued under share-based compensation plan (value) | 0 |  | $ 0 |  |  |  |
Share-based compensation expense (value) | 750 |  |  | 750 |  |  |
Net income | 13,174 |  |  |  | 13,174 |  |
Dividends paid | (3,530) |  |  |  | (3,530) |  |
Currency translation adjustment | (2,489) |  |  |  |  | (2,489) |
Balance at end of period (shares) at Mar. 31, 2016 |  | 0 | 40,295 |  |  |  | 12,052
Balance at end of period (value) at Mar. 31, 2016 | $ 439,287 | $ 0 | $ 403 | $ 203,143 | $ 653,248 | $ (80,899) | $ (336,608)

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- Definition Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6419406&loc=d3e23524-113945 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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