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UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2018 - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Accumulated Earnings
--- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2017 | $ 1,188,202 | $ 565 | $ 686,962 | $ (172,407) | $ 673,082
Balance beginning of period (in shares) at Dec. 31, 2017 |  | 56,501 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income | 49,205 |  |  |  | 49,205
Other comprehensive loss | (13,098) |  |  | (13,098) |
Stock-based compensation | 10,726 |  | 10,726 |  |
Issuance of restricted shares, net of shares remitted and tax withholdings | (2,566) | $ 1 | (2,567) |  |
Issuance of restricted shares, net of shares remitted and tax withholdings (in shares) |  | 133 |  |  |
Repurchases of common stock | $ (33,581) | $ (6) | (33,575) |  |
Repurchases of common stock (in shares) | (600) | (636) |  |  |
Balance at end of period at Sep. 30, 2018 | $ 1,197,324 | $ 560 | $ 661,546 | $ (185,505) | 720,723
Balance ending of period (in shares) at Sep. 30, 2018 |  | 55,998 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Cumulative effect of change in accounting principle | $ (1,564) |  |  |  |
Cumulative effect of change in accounting principle | Accounting Standards Update 2016-16 |  |  |  |  | $ (1,564)

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