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v3.10.0.1

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | --- | ---
Beginning balace at Dec. 31, 2016 | $ 338 | $ 513,531 | $ 331,311 | $ (2,381) | $ 842,799
Beginning balace (in shares) at Dec. 31, 2016 | 34,023,850 |  |  |  |
Net Income |  |  | 84,663 |  | 84,663
Other comprehensive gain, net of tax |  |  |  | 1,432 | 1,432
Stock-based compensation expense |  | 4,198 | 1 |  | 4,199
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes | $ 1 | 258 |  |  | 259
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares) | 60,925 |  |  |  |
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes | $ 1 | (2) |  |  | (1)
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares) | (16,962) |  |  |  |
Time based stock awards granted (in shares) | 91,097 |  |  |  |
Issuance of common stock related to employee stock purchase plan |  | 631 |  |  | 631
Issuance of common stock related to employee stock purchase plan (in shares) | 11,510 |  |  |  |
Vesting of performance based stock awards, net of shares withheld for payroll taxes (in shares) | 3,589 |  |  |  |
Ending balance at Sep. 30, 2017 | $ 340 | 518,616 | 415,975 | (949) | 933,982
Ending balance (in shares) at Sep. 30, 2017 | 34,174,009 |  |  |  |
Beginning balace at Dec. 31, 2017 | $ 340 | 520,304 | 431,544 | (1,750) | $ 950,438
Beginning balace (in shares) at Dec. 31, 2017 | 34,185,163 |  |  |  | 34,185,163
Net Income |  |  | 111,959 |  | $ 111,959
Other comprehensive gain, net of tax |  |  |  | (6,866) | (6,866)
Stock-based compensation expense |  | 5,174 |  |  | 5,174
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes |  | 338 |  |  | 338
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares) | 32,230 |  |  |  |
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes | $ 1 | (1) |  |  |
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares) | (13,681) |  |  |  |
Time based stock awards granted (in shares) | 94,344 |  |  |  |
Issuance of common stock related to employee stock purchase plan |  | 608 |  |  | 608
Issuance of common stock related to employee stock purchase plan (in shares) | 10,417 |  |  |  |
Reclassification of the income tax effects of the Tax Cuts and Jobs Act from AOCI (ASU 2018-02) |  |  | 674 | (674) |
Ending balance at Sep. 30, 2018 | $ 341 | $ 526,423 | $ 544,177 | $ (9,290) | $ 1,061,651
Ending balance (in shares) at Sep. 30, 2018 | 34,308,473 |  |  |  | 34,185,163

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