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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Total Stockholders' Equity | Noncontrolling Interest | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 108,862 | $ 363,794 | $ (670) | $ (3,408) | $ 468,578 | $ 89 | $ 468,667
Balance (in shares) at Dec. 31, 2017 | 25,025,933 |  |  |  |  |  |
Adoption of ASU | Accounting Standards Update 2018-02 |  | 173 | (173) |  | 0 |  | 0
Adoption of ASU | Accounting Standards Update 2014-09 |  | 24 |  |  | 24 |  | 24
Adoption of ASU | Accounting Standards Update 2016-01 |  | 68 | (68) |  | 0 |  | 0
Net income |  | 59,048 |  |  | 59,048 |  | 59,048
Other comprehensive income (loss), net of tax |  |  | (12,365) |  | (12,365) |  | (12,365)
Comprehensive income (loss) |  |  |  |  |  |  | 46,683
Cash dividends declared |  | (18,713) |  |  | (18,713) |  | (18,713)
Treasury shares purchased under deferred directors' plan | $ 418 |  |  | (418) | 0 |  | 0
Treasury shares purchased under deferred directors' plan (in shares) | (8,602) |  |  |  |  |  |
Treasury shares sold and distributed under deferred directors' plan | $ (115) |  |  | 115 | 0 |  | 0
Treasury shares sold and distributed under deferred directors' plan (in shares) | 5,636 |  |  |  |  |  |
Stock activity under equity compensation plans | $ (2,435) |  |  |  | (2,435) |  | (2,435)
Stock activity under equity compensation plans (in shares) | 106,829 |  |  |  |  |  |
Stock based compensation expense | $ 4,315 |  |  |  | 4,315 |  | 4,315
Balance at Sep. 30, 2018 | $ 111,045 | 404,394 | (13,276) | (3,711) | 498,452 | 89 | 498,541
Balance (in shares) at Sep. 30, 2018 | 25,129,796 |  |  |  |  |  |
Balance at Jun. 30, 2018 | $ 109,223 | 390,404 | (9,710) | (3,522) | 486,395 | 89 | 486,484
Balance (in shares) at Jun. 30, 2018 | 25,126,537 |  |  |  |  |  |
Net income |  | 20,570 |  |  | 20,570 |  | 20,570
Other comprehensive income (loss), net of tax |  |  | (3,566) |  | (3,566) |  | (3,566)
Comprehensive income (loss) |  |  |  |  |  |  | 17,004
Cash dividends declared |  | (6,580) |  |  | (6,580) |  | (6,580)
Treasury shares purchased under deferred directors' plan | $ 189 |  |  | (189) | 0 |  | 0
Treasury shares purchased under deferred directors' plan (in shares) | (3,891) |  |  |  |  |  |
Stock activity under equity compensation plans | $ 0 |  |  |  | 0 |  | 0
Stock activity under equity compensation plans (in shares) | 7,150 |  |  |  |  |  |
Stock based compensation expense | $ 1,633 |  |  |  | 1,633 |  | 1,633
Balance at Sep. 30, 2018 | $ 111,045 | 404,394 | (13,276) | (3,711) | 498,452 | 89 | 498,541
Balance (in shares) at Sep. 30, 2018 | 25,129,796 |  |  |  |  |  |
Balance at Dec. 31, 2018 | $ 112,383 | 419,179 | (6,191) | (3,756) | 521,615 | 89 | 521,704
Balance (in shares) at Dec. 31, 2018 | 25,128,773 |  |  |  |  |  |
Adoption of ASU | Accounting Standards Update 2017-08 |  | (1,327) |  |  | (1,327) |  | (1,327)
Net income |  | 64,849 |  |  | 64,849 |  | 64,849
Other comprehensive income (loss), net of tax |  |  | 19,658 |  | 19,658 |  | 19,658
Comprehensive income (loss) |  |  |  |  |  |  | 84,507
Cash dividends declared |  | (21,965) |  |  | (21,965) |  | (21,965)
Cashless exercise of warrants (in shares) | 224,066 |  |  |  |  |  |
Cashless exercise of warrants | $ 0 |  |  |  | 0 |  | 0
Treasury shares purchased under deferred directors' plan | $ 461 |  |  | (461) | 0 |  | 0
Treasury shares purchased under deferred directors' plan (in shares) | (10,356) |  |  |  |  |  |
Treasury shares sold and distributed under deferred directors' plan | $ (118) |  |  | 118 | 0 |  | 0
Treasury shares sold and distributed under deferred directors' plan (in shares) | 5,699 |  |  |  |  |  |
Stock activity under equity compensation plans | $ 2,109 |  |  |  | 2,109 |  | 2,109
Stock activity under equity compensation plans (in shares) | 97,218 |  |  |  |  |  |
Stock based compensation expense | $ 3,626 |  |  |  | 3,626 |  | 3,626
Balance at Sep. 30, 2019 | $ 114,243 | 460,736 | 13,467 | (4,099) | 584,347 | 89 | 584,436
Balance (in shares) at Sep. 30, 2019 | 25,445,400 |  |  |  |  |  |
Balance at Jun. 30, 2019 | $ 112,689 | 446,969 | 9,500 | (3,884) | 565,274 | 89 | 565,363
Balance (in shares) at Jun. 30, 2019 | 25,442,300 |  |  |  |  |  |
Net income |  | 21,454 |  |  | 21,454 |  | 21,454
Other comprehensive income (loss), net of tax |  |  | 3,967 |  | 3,967 |  | 3,967
Comprehensive income (loss) |  |  |  |  |  |  | 25,421
Cash dividends declared |  | (7,687) |  |  | (7,687) |  | (7,687)
Treasury shares purchased under deferred directors' plan | $ 215 |  |  | (215) | 0 |  | 0
Treasury shares purchased under deferred directors' plan (in shares) | (4,700) |  |  |  |  |  |
Stock activity under equity compensation plans | $ (20) |  |  |  | (20) |  | (20)
Stock activity under equity compensation plans (in shares) | 7,800 |  |  |  |  |  |
Stock based compensation expense | $ 1,359 |  |  |  | 1,359 |  | 1,359
Balance at Sep. 30, 2019 | $ 114,243 | $ 460,736 | $ 13,467 | $ (4,099) | $ 584,347 | $ 89 | $ 584,436
Balance (in shares) at Sep. 30, 2019 | 25,445,400 |  |  |  |  |  |

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