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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDER'S EQUITY - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Loss | Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Balance Beginning of Period, Shares (in shares) at Dec. 31, 2018 |  | 88,044,000 |  |  |  |
Balance, Beginning of Period at Dec. 31, 2018 | $ 1,375,796 | $ 880 | $ (120,615) | $ 1,192,601 | $ (45,443) | $ 348,373
Balance, Beginning of Period, Treasury Stock, Shares (in shares) at Dec. 31, 2018 |  |  | (2,881,000) |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 32,756 |  |  |  |  | 32,756
Other comprehensive loss, net of tax | (11,236) |  |  |  | (11,236) |
Issuance of common stock through employee stock purchase plan (in shares) |  | 17,000 |  |  |  |
Issuance of common stock through employee stock purchase plan | 716 |  |  | 716 |  |
Issuance of common stock for vesting of share based awards, net of shares withheld for taxes (in shares) |  | 243,000 | 12,000 |  |  |
Issuance of common stock for vesting of share based awards, net of shares withheld for taxes | (5,121) | $ 2 | $ 506 | (5,629) |  |
Share-based compensation | 4,119 |  |  | 4,119 |  |
Balance End of Period, Shares (in shares) at Mar. 31, 2019 |  | 88,304,000 |  |  |  |
Balance, End of Period at Mar. 31, 2019 | 1,397,030 | $ 882 | $ (120,109) | 1,191,807 | (56,679) | 381,129
Balance, End of Period, Treasury Stock, Shares (in shares) at Mar. 31, 2019 |  |  | (2,869,000) |  |  |
Balance Beginning of Period, Shares (in shares) at Dec. 31, 2019 |  | 88,735,000 |  |  |  |
Balance, Beginning of Period at Dec. 31, 2019 | $ 1,416,736 | $ 887 | $ (119,943) | 1,213,620 | (76,401) | 398,573
Balance, Beginning of Period, Treasury Stock, Shares (in shares) at Dec. 31, 2019 | (2,865,000) |  | (2,865,000) |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | $ 9,180 |  |  |  |  | 9,180
Other comprehensive loss, net of tax | (28,187) |  |  |  | (28,187) |
Issuance of common stock through employee stock purchase plan (in shares) |  | 13,000 |  |  |  |
Issuance of common stock through employee stock purchase plan | 694 |  |  | 694 |  |
Issuance of common stock for vesting of share based awards, net of shares withheld for taxes (in shares) |  | 357,000 | 10,000 |  |  |
Issuance of common stock for vesting of share based awards, net of shares withheld for taxes | (2,739) | $ 2 | $ 476 | (3,217) |  |
Share-based compensation | 3,781 |  |  | 3,781 |  |
Share repurchase and equity component of the convertible note issuance, net (in shares) |  |  | (135,000) |  |  |
Share repurchase and equity component of the convertible note issuance, net | $ 34,906 |  | $ (7,632) | 42,538 |  |
Accelerated shares repurchased (in shares) | (1,400,000) |  | (1,304,000) |  |  |
Accelerated shares repurchased | $ (92,368) |  | $ (75,407) | (16,961) |  |
Balance End of Period, Shares (in shares) at Mar. 31, 2020 |  | 89,105,000 |  |  |  |
Balance, End of Period at Mar. 31, 2020 | $ 1,341,803 | $ 889 | $ (202,506) | $ 1,240,455 | $ (104,588) | $ 407,553
Balance, End of Period, Treasury Stock, Shares (in shares) at Mar. 31, 2020 | (4,294,000) |  | (4,294,000) |  |  |

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