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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Number of Common Shares outstanding | Treasury shares | Additional Paid-In Capital | Common Shares held in treasury | Retained earnings | Accumulated other comprehensive loss | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2018 |  |  |  | $ 231,647 | $ (8,880) | $ 146,251 | $ (85,752) | $ 283,266 |
Common Stock, Share, Beginning Balance (in shares) at Dec. 31, 2018 |  | 28,488 |  |  |  |  |  |  |
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2018 |  |  | 478 |  |  |  |  |  |
Net income (loss) |  |  |  |  |  | 9,657 |  | 9,657 |
Unrealized gain (loss) on derivatives, net |  |  |  |  |  |  | 42 | 42 |
Currency translation adjustments |  |  |  |  |  |  | (3,804) | (3,804) |
Issuance of Common Shares ( in shares) |  | 305 |  |  |  |  |  |  |
Issuance of Common Shares ( in treasury shares) |  |  | (305) |  |  |  |  |  |
Repurchased Common Shares for treasury, net |  |  |  |  | (1,883) |  |  | (1,883) |
Repurchased Common Shares for treasury (in shares) |  | (98) |  |  |  |  |  |  |
Repurchased Common Shares for treasury (in treasury shares) |  |  | 98 |  |  |  |  |  |
Share-based compensation |  |  |  | 480 |  |  |  | 480 |
Balance at Mar. 31, 2019 |  |  |  | 232,127 | (10,763) | 155,908 | (89,514) | 287,758 |
Common Stock, Share, Ending Balance (in shares) at Mar. 31, 2019 |  | 28,695 |  |  |  |  |  |  |
Treasury Stock, Shares, Ending Balance at Mar. 31, 2019 |  |  | 271 |  |  |  |  |  |
Balance at Dec. 31, 2018 |  |  |  | 231,647 | (8,880) | 146,251 | (85,752) | 283,266 |
Common Stock, Share, Beginning Balance (in shares) at Dec. 31, 2018 |  | 28,488 |  |  |  |  |  |  |
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2018 |  |  | 478 |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  | 49,421 |
Unrealized gain (loss) on derivatives, net | [1] |  |  |  |  |  |  | (70) |
Balance at Jun. 30, 2019 |  |  |  | 223,831 | (50,689) | 195,672 | (87,315) | 281,499 |
Common Stock, Share, Ending Balance (in shares) at Jun. 30, 2019 |  | 27,367 |  |  |  |  |  |  |
Treasury Stock, Shares, Ending Balance at Jun. 30, 2019 |  |  | 1,599 |  |  |  |  |  |
Balance at Mar. 31, 2019 |  |  |  | 232,127 | (10,763) | 155,908 | (89,514) | 287,758 |
Common Stock, Share, Beginning Balance (in shares) at Mar. 31, 2019 |  | 28,695 |  |  |  |  |  |  |
Treasury Stock, Shares, Beginning Balance at Mar. 31, 2019 |  |  | 271 |  |  |  |  |  |
Net income (loss) |  |  |  |  |  | 39,764 |  | 39,764 |
Unrealized gain (loss) on derivatives, net |  |  |  |  |  |  | (112) | (112) | [1]
Currency translation adjustments |  |  |  |  |  |  | 2,311 | 2,311 |
Issuance of Common Shares ( in shares) |  | 31 |  |  |  |  |  |  |
Issuance of Common Shares ( in treasury shares) |  |  | (31) |  |  |  |  |  |
Repurchased Common Shares for treasury, net |  |  |  |  | 74 |  |  | 74 |
Repurchased Common Shares for treasury (in shares) |  | (9) |  |  |  |  |  |  |
Repurchased Common Shares for treasury (in treasury shares) |  |  | 9 |  |  |  |  |  |
Common Share repurchase program |  |  |  | (10,000) | (40,000) |  |  | (50,000) |
Common Share repurchase program (in shares) |  | (1,350) |  |  |  |  |  |  |
Common Share repurchase program (in treasury shares) |  |  | 1,350 |  |  |  |  |  |
Share-based compensation |  |  |  | 1,704 |  |  |  | 1,704 |
Balance at Jun. 30, 2019 |  |  |  | 223,831 | (50,689) | 195,672 | (87,315) | 281,499 |
Common Stock, Share, Ending Balance (in shares) at Jun. 30, 2019 |  | 27,367 |  |  |  |  |  |  |
Treasury Stock, Shares, Ending Balance at Jun. 30, 2019 |  |  | 1,599 |  |  |  |  |  |
Balance at Dec. 31, 2019 |  |  |  | 225,607 | (50,773) | 206,542 | (91,472) | $ 289,904 |
Common Stock, Share, Beginning Balance (in shares) at Dec. 31, 2019 |  | 27,408 |  |  |  |  |  | 27,408 |
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2019 |  |  | 1,558 |  |  |  |  | 1,558 |
Net income (loss) |  |  |  |  |  | 3,490 |  | $ 3,490 |
Unrealized gain (loss) on derivatives, net |  |  |  |  |  |  | (3,655) | (3,655) |
Currency translation adjustments |  |  |  |  |  |  | (17,119) | (17,119) |
Issuance of Common Shares ( in shares) |  | 267 |  |  |  |  |  |  |
Issuance of Common Shares ( in treasury shares) |  |  | (267) |  |  |  |  |  |
Repurchased Common Shares for treasury, net |  |  |  |  | 4,769 |  |  | 4,769 |
Repurchased Common Shares for treasury (in shares) |  | (75) |  |  |  |  |  |  |
Repurchased Common Shares for treasury (in treasury shares) |  |  | 75 |  |  |  |  |  |
Common Share repurchase program |  |  |  | 10,000 | (14,995) |  |  | (4,995) |
Common Share repurchase program (in shares) |  | (607) |  |  |  |  |  |  |
Common Share repurchase program (in treasury shares) |  |  | 607 |  |  |  |  |  |
Share-based compensation |  |  |  | (5,101) |  |  |  | (5,101) |
Balance at Mar. 31, 2020 |  |  |  | 230,506 | (60,999) | 210,032 | (112,246) | 267,293 |
Common Stock, Share, Ending Balance (in shares) at Mar. 31, 2020 |  | 26,993 |  |  |  |  |  |  |
Treasury Stock, Shares, Ending Balance at Mar. 31, 2020 |  |  | 1,973 |  |  |  |  |  |
Balance at Dec. 31, 2019 |  |  |  | 225,607 | (50,773) | 206,542 | (91,472) | $ 289,904 |
Common Stock, Share, Beginning Balance (in shares) at Dec. 31, 2019 |  | 27,408 |  |  |  |  |  | 27,408 |
Treasury Stock, Shares, Beginning Balance at Dec. 31, 2019 |  |  | 1,558 |  |  |  |  | 1,558 |
Net income (loss) |  |  |  |  |  |  |  | $ (18,244) |
Unrealized gain (loss) on derivatives, net | [1] |  |  |  |  |  |  | (2,445) |
Balance at Jun. 30, 2020 |  |  |  | 230,818 | (60,639) | 188,298 | (109,215) | $ 249,262 |
Common Stock, Share, Ending Balance (in shares) at Jun. 30, 2020 |  | 27,001 |  |  |  |  |  | 27,001 |
Treasury Stock, Shares, Ending Balance at Jun. 30, 2020 |  |  | 1,965 |  |  |  |  | 1,965 |
Balance at Mar. 31, 2020 |  |  |  | 230,506 | (60,999) | 210,032 | (112,246) | $ 267,293 |
Common Stock, Share, Beginning Balance (in shares) at Mar. 31, 2020 |  | 26,993 |  |  |  |  |  |  |
Treasury Stock, Shares, Beginning Balance at Mar. 31, 2020 |  |  | 1,973 |  |  |  |  |  |
Net income (loss) |  |  |  |  |  | (21,734) |  | (21,734) |
Unrealized gain (loss) on derivatives, net |  |  |  |  |  |  | 1,210 | 1,210 | [1]
Currency translation adjustments |  |  |  |  |  |  | 1,821 | 1,821 |
Issuance of Common Shares ( in shares) |  | 12 |  |  |  |  |  |  |
Issuance of Common Shares ( in treasury shares) |  |  | (12) |  |  |  |  |  |
Repurchased Common Shares for treasury, net |  |  |  |  | 360 |  |  | 360 |
Repurchased Common Shares for treasury (in shares) |  | (4) |  |  |  |  |  |  |
Repurchased Common Shares for treasury (in treasury shares) |  |  | 4 |  |  |  |  |  |
Share-based compensation |  |  |  | 312 |  |  |  | 312 |
Balance at Jun. 30, 2020 |  |  |  | $ 230,818 | $ (60,639) | $ 188,298 | $ (109,215) | $ 249,262 |
Common Stock, Share, Ending Balance (in shares) at Jun. 30, 2020 |  | 27,001 |  |  |  |  |  | 27,001 |
Treasury Stock, Shares, Ending Balance at Jun. 30, 2020 |  |  | 1,965 |  |  |  |  | 1,965 |
[1] | Net of tax expense (benefit) of $322 and $(30) for the three months ended June 30, 2020 and 2019, respectively. Net of tax benefit of $(650) and $(19) for the six months ended June 30, 2020 and 2019, respectively.

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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration