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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment [Member] | Common Stock [Member] | Additional Paid In Capital [Member] | Retained Earnings [Member] | Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
--- | --- | --- | --- | --- | --- | --- | --- | ---
BALANCE at Dec. 31, 2018 | $ 182,498 |  | $ 327 | $ 181,815 | $ 105,212 |  |  | $ (431)
BALANCE, Shares at Dec. 31, 2018 |  |  | 32,723,972 |  |  |  |  |
BALANCE, Treasury Stock, Value at Dec. 31, 2018 |  |  |  |  |  |  | $ (104,425) |
BALANCE, Treasury Stock, Shares at Dec. 31, 2018 |  |  |  |  |  |  | (2,808,361) |
Net income | 48,965 |  |  |  | 48,965 |  |  |
Issuance of common stock awards to employees, value |  |  | $ 2 | (2) |  |  |  |
Issuance of common stock awards to employees, shares |  |  | 139,862 |  |  |  |  |
Surrender of common stock awards, value | (2,331) |  |  |  |  |  | $ (2,331) |
Surrender of common stock awards, shares |  |  |  |  |  |  | (46,394) |
Share-based compensation expense | 6,144 |  |  | 6,144 |  |  |  |
Share-based compensation issued to directors, value | 259 |  |  | 259 |  |  |  |
Share-based compensation issued to directors, shares |  |  | 7,670 |  |  |  |  |
Other comprehensive income (loss), net of tax | (8,021) |  |  |  |  |  |  | (8,021)
BALANCE at Sep. 30, 2019 | 227,514 |  | $ 329 | 188,216 | 154,177 |  |  | (8,452)
BALANCE, Shares at Sep. 30, 2019 |  |  | 32,871,504 |  |  |  |  |
BALANCE, Treasury Stock, Value at Sep. 30, 2019 |  |  |  |  |  |  | $ (106,756) |
BALANCE, Treasury Stock, Shares at Sep. 30, 2019 |  |  |  |  |  |  | (2,854,755) |
BALANCE at Jun. 30, 2019 | 206,002 |  | $ 329 | 186,182 | 132,965 |  |  | (6,726)
BALANCE, Shares at Jun. 30, 2019 |  |  | 32,871,504 |  |  |  |  |
BALANCE, Treasury Stock, Value at Jun. 30, 2019 |  |  |  |  |  |  | $ (106,748) |
BALANCE, Treasury Stock, Shares at Jun. 30, 2019 |  |  |  |  |  |  | (2,854,496) |
Net income | 21,212 |  |  |  | 21,212 |  |  |
Surrender of common stock awards, value | (8) |  |  |  |  |  | $ (8) |
Surrender of common stock awards, shares |  |  |  |  |  |  | (259) |
Share-based compensation expense | 1,933 |  |  | 1,933 |  |  |  |
Share-based compensation issued to directors, value | 101 |  |  | 101 |  |  |  |
Other comprehensive income (loss), net of tax | (1,726) |  |  |  |  |  |  | (1,726)
BALANCE at Sep. 30, 2019 | 227,514 |  | $ 329 | 188,216 | 154,177 |  |  | (8,452)
BALANCE, Shares at Sep. 30, 2019 |  |  | 32,871,504 |  |  |  |  |
BALANCE, Treasury Stock, Value at Sep. 30, 2019 |  |  |  |  |  |  | $ (106,756) |
BALANCE, Treasury Stock, Shares at Sep. 30, 2019 |  |  |  |  |  |  | (2,854,755) |
BALANCE at Dec. 31, 2019 | $ 250,031 | $ (1,190) | $ 329 | 190,230 | 173,371 | $ (1,190) |  | (7,143)
BALANCE, Shares at Dec. 31, 2019 | 32,871,504 |  | 32,871,504 |  |  |  |  |
BALANCE, Treasury Stock, Value at Dec. 31, 2019 | $ (106,756) |  |  |  |  |  | $ (106,756) |
BALANCE, Treasury Stock, Shares at Dec. 31, 2019 | (2,855,164) |  |  |  |  |  | (2,855,164) |
Net income | $ 69,402 |  |  |  | 69,402 |  |  |
Issuance of common stock awards to employees, value |  |  | $ 2 | (2) |  |  |  |
Issuance of common stock awards to employees, shares |  |  | 249,435 |  |  |  |  |
Surrender of common stock awards, value | (973) |  |  |  |  |  | $ (973) |
Surrender of common stock awards, shares |  |  |  |  |  |  | (29,069) |
Share-based compensation expense | 7,029 |  |  | 7,029 |  |  |  |
Share-based compensation issued to directors, value | 229 |  |  | 229 |  |  |  |
Share-based compensation issued to directors, shares |  |  | 6,371 |  |  |  |  |
Common stock repurchase, value | (15,759) |  |  |  |  |  | $ (15,759) |
Common stock repurchase, shares |  |  |  |  |  |  | (442,542) |
Other comprehensive income (loss), net of tax | (4,582) |  |  |  |  |  |  | (4,582)
BALANCE at Sep. 30, 2020 | $ 304,187 |  | $ 331 | 197,486 | 241,583 |  |  | (11,725)
BALANCE, Shares at Sep. 30, 2020 | 33,127,310 |  | 33,127,310 |  |  |  |  |
BALANCE, Treasury Stock, Value at Sep. 30, 2020 | $ (123,488) |  |  |  |  |  | $ (123,488) |
BALANCE, Treasury Stock, Shares at Sep. 30, 2020 | (3,326,775) |  |  |  |  |  | (3,326,775) |
BALANCE at Jun. 30, 2020 | $ 272,736 |  | $ 331 | 195,288 | 213,506 |  |  | (12,901)
BALANCE, Shares at Jun. 30, 2020 |  |  | 33,124,237 |  |  |  |  |
BALANCE, Treasury Stock, Value at Jun. 30, 2020 |  |  |  |  |  |  | $ (123,488) |
BALANCE, Treasury Stock, Shares at Jun. 30, 2020 |  |  |  |  |  |  | (3,325,049) |
Net income | 28,077 |  |  |  | 28,077 |  |  |
Issuance of common stock awards to employees, shares |  |  | 3,073 |  |  |  |  |
Surrender of common stock awards, shares |  |  |  |  |  |  | (1,726) |
Share-based compensation expense | 2,094 |  |  | 2,094 |  |  |  |
Share-based compensation issued to directors, value | 104 |  |  | 104 |  |  |  |
Other comprehensive income (loss), net of tax | 1,176 |  |  |  |  |  |  | 1,176
BALANCE at Sep. 30, 2020 | $ 304,187 |  | $ 331 | $ 197,486 | $ 241,583 |  |  | $ (11,725)
BALANCE, Shares at Sep. 30, 2020 | 33,127,310 |  | 33,127,310 |  |  |  |  |
BALANCE, Treasury Stock, Value at Sep. 30, 2020 | $ (123,488) |  |  |  |  |  | $ (123,488) |
BALANCE, Treasury Stock, Shares at Sep. 30, 2020 | (3,326,775) |  |  |  |  |  | (3,326,775) |

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