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UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Accumulated Earnings
--- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |
Balance beginning of period (in shares) at Dec. 31, 2018 |  | 55,847 |  |  |
Balance beginning of period at Dec. 31, 2018 | $ 1,169,756 | $ 558 | $ 655,415 | $ (223,371) | $ 737,154
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income | 976 |  |  |  | 976
Other comprehensive (loss) income | 4,024 |  |  | 4,024 |
Stock-based compensation | 5,809 |  | 5,809 |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings (in shares) |  | 78 |  |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings | (2,276) | $ 1 | (2,277) |  |
Repurchases of common stock (in shares) |  | (97) |  |  |
Repurchases of common stock | (6,324) | $ (1) | (6,323) |  |
Balance ending of period (in shares) at Mar. 31, 2019 |  | 55,828 |  |  |
Balance ending of period at Mar. 31, 2019 | 1,171,965 | $ 558 | 652,624 | (219,347) | 738,130
Balance beginning of period (in shares) at Dec. 31, 2018 |  | 55,847 |  |  |
Balance beginning of period at Dec. 31, 2018 | 1,169,756 | $ 558 | 655,415 | (223,371) | 737,154
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income | 73,589 |  |  |  |
Other comprehensive (loss) income | (319) |  |  |  |
Balance ending of period (in shares) at Sep. 30, 2019 |  | 55,808 |  |  |
Balance ending of period at Sep. 30, 2019 | $ 1,235,795 | $ 558 | 648,184 | (223,690) | 810,743
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |
Balance beginning of period (in shares) at Mar. 31, 2019 |  | 55,828 |  |  |
Balance beginning of period at Mar. 31, 2019 | $ 1,171,965 | $ 558 | 652,624 | (219,347) | 738,130
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income | 36,244 |  |  |  | 36,244
Other comprehensive (loss) income | 5,076 |  |  | 5,076 |
Stock-based compensation | 3,834 |  | 3,834 |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings (in shares) |  | 105 |  |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings | (2,704) | $ 1 | (2,705) |  |
Repurchases of common stock (in shares) |  | (74) |  |  |
Repurchases of common stock | (4,948) |  | (4,948) |  |
Balance ending of period (in shares) at Jun. 30, 2019 |  | 55,859 |  |  |
Balance ending of period at Jun. 30, 2019 | $ 1,209,467 | $ 559 | 648,805 | (214,271) | 774,374
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |
Net income | $ 36,369 |  |  |  | 36,369
Other comprehensive (loss) income | (9,419) |  |  | (9,419) |
Stock-based compensation | 5,021 |  | 5,021 |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings (in shares) |  | 17 |  |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings | (525) |  | (525) |  |
Repurchases of common stock (in shares) |  | (68) |  |  |
Repurchases of common stock | (5,118) | $ (1) | (5,117) |  |
Balance ending of period (in shares) at Sep. 30, 2019 |  | 55,808 |  |  |
Balance ending of period at Sep. 30, 2019 | $ 1,235,795 | $ 558 | 648,184 | (223,690) | 810,743
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |
Balance beginning of period (in shares) at Dec. 31, 2019 |  | 55,798 |  |  |
Balance beginning of period at Dec. 31, 2019 | $ 1,269,813 | $ 558 | 644,412 | (210,051) | 834,894
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income | 11,572 |  |  |  | 11,572
Other comprehensive (loss) income | (59,306) |  |  | (59,306) |
Stock-based compensation | 3,291 |  | 3,291 |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings (in shares) |  | 59 |  |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings | (2,224) | $ 1 | (2,225) |  |
Repurchases of common stock (in shares) |  | (302) |  |  |
Repurchases of common stock | (17,341) | $ (3) | (17,338) |  |
Balance ending of period (in shares) at Mar. 31, 2020 |  | 55,555 |  |  |
Balance ending of period at Mar. 31, 2020 | 1,205,805 | $ 556 | 628,140 | (269,357) | 846,466
Balance beginning of period (in shares) at Dec. 31, 2019 |  | 55,798 |  |  |
Balance beginning of period at Dec. 31, 2019 | 1,269,813 | $ 558 | 644,412 | (210,051) | 834,894
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income | 95,505 |  |  |  |
Other comprehensive (loss) income | (29,393) |  |  |  |
Balance ending of period (in shares) at Sep. 30, 2020 |  | 55,246 |  |  |
Balance ending of period at Sep. 30, 2020 | $ 1,304,715 | $ 552 | 613,208 | (239,444) | 930,399
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |
Balance beginning of period (in shares) at Mar. 31, 2020 |  | 55,555 |  |  |
Balance beginning of period at Mar. 31, 2020 | $ 1,205,805 | $ 556 | 628,140 | (269,357) | 846,466
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income | 29,023 |  |  |  | 29,023
Other comprehensive (loss) income | 17,528 |  |  | 17,528 |
Stock-based compensation | 2,786 |  | 2,786 |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings (in shares) |  | 58 |  |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings | (1,171) |  | (1,171) |  |
Balance ending of period (in shares) at Jun. 30, 2020 |  | 55,613 |  |  |
Balance ending of period at Jun. 30, 2020 | $ 1,253,971 | $ 556 | 629,755 | (251,829) | 875,489
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |
Net income | $ 54,910 |  |  |  | 54,910
Other comprehensive (loss) income | 12,385 |  |  | 12,385 |
Stock-based compensation | 6,662 |  | 6,662 |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings (in shares) |  | 35 |  |  |
Issuance of common stock for restricted share vesting, net of employee tax withholdings | (1,012) |  | (1,012) |  |
Repurchases of common stock (in shares) |  | (402) |  |  |
Repurchases of common stock | (22,201) | $ (4) | (22,197) |  |
Balance ending of period (in shares) at Sep. 30, 2020 |  | 55,246 |  |  |
Balance ending of period at Sep. 30, 2020 | $ 1,304,715 | $ 552 | $ 613,208 | $ (239,444) | $ 930,399
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Common stock, par value (in USD per share) | $ 0.01 |  |  |  |

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