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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2016 | 54,392 |  |  |
Balance at Dec. 31, 2016 | $ 544 | $ 74,175 | $ 362,619 | $ 437,338
Net income |  |  | 90,284 | 90,284
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares) | 141 |  |  |
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards | $ 1 | 1,089 |  | 1,090
Employee taxes paid in exchange for shares withheld |  | (47) |  | (47)
Share-based payment arrangement compensation expense |  | 1,250 |  | 1,250
Dividends on common stock |  |  | (4,361) | (4,361)
Cash in lieu of fractional shares from stock split | $ 0 | (54) | 0 | $ (54)
Repurchase and retirement of common stock (in shares) |  |  |  | 0
Balance (in shares) at Dec. 31, 2017 | 54,533 |  |  |
Balance at Dec. 31, 2017 | $ 545 | 76,413 | 448,542 | $ 525,500
Net income |  |  | 55,027 | 55,027
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares) | 134 |  |  |
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards |  | 936 |  | 938
Employee taxes paid in exchange for shares withheld |  | (104) |  | (104)
Share-based payment arrangement compensation expense |  | 3,323 |  | 3,323
Dividends on common stock |  |  | (5,459) | (5,459)
Adoption of accounting standard |  |  | 485 | 485
Repurchase and retirement of common stock (in shares) | (200) |  |  |
Repurchase and retirement of common stock | $ (2) | (3,754) | 0 | (3,756)
Balance (in shares) at Dec. 31, 2018 | 54,467 |  |  |
Balance at Dec. 31, 2018 | $ 545 | 76,814 | 498,595 | 575,954
Net income |  |  | 61,071 | 61,071
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares) | 236 |  |  |
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards | $ 2 | 1,618 |  | 1,620
Employee taxes paid in exchange for shares withheld |  | (784) |  | (784)
Share-based payment arrangement compensation expense |  | 1,817 |  | 1,817
Dividends on common stock |  |  | (42,089) | $ (42,089)
Repurchase and retirement of common stock (in shares) |  |  |  | 0
Balance (in shares) at Dec. 31, 2019 | 54,703 |  |  |
Balance at Dec. 31, 2019 | $ 547 | $ 79,465 | $ 517,577 | $ 597,589

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