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Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands | Total | Common stock and additional paid-in capital | Retained earnings | Accumulated other comprehensive income (loss)
--- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2017 |  | 10,829,918 |  |
Beginning balance at Dec. 31, 2017 | $ 181,321 | $ 61,855 | $ 121,144 | $ (1,678)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 23,536 |  | 23,536 |
Net unrealized loss on securities available for sale, net of tax | (2,150) |  |  | (2,150)
Net loss on cash flow hedging derivative instruments | (106) |  |  | (106)
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | (23) |  |  | (23)
Unrecognized gain (loss) for post-retirement benefits, net of tax | 184 |  |  | 184
Comprehensive income | 21,441 |  | 23,536 | (2,095)
Cash dividends declared | (12,052) |  | (12,052) |
Equity compensation expense | 381 | $ 381 |  |
Payment for repurchase of common stock (in shares) |  | (5,725) |  |
Payment for repurchase of common stock | (168) |  | (168) |
Reclassification adjustment for effect of enacted tax law changes | 0 |  |  |
Issuance of restricted stock (in shares) |  | 16,795 |  |
Issuance of restricted stock | 0 |  |  |
Proceeds from sale of common stock (in shares) |  | 21,663 |  |
Proceeds from sale of common stock | 619 | $ 619 |  |
Balance (in shares) at Dec. 31, 2018 |  | 10,862,651 |  |
Ending balance at Dec. 31, 2018 | 191,542 | $ 62,855 | 132,460 | (3,773)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 6,156 |  |  |
Net unrealized loss on securities available for sale, net of tax | 3,512 |  |  |
Net loss on cash flow hedging derivative instruments | (465) |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 3 |  |  |
Ending balance at Mar. 31, 2019 | 197,787 |  |  |
Balance (in shares) at Dec. 31, 2018 |  | 10,862,651 |  |
Beginning balance at Dec. 31, 2018 | 191,542 | $ 62,855 | 132,460 | (3,773)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 25,525 |  | 25,525 |
Net unrealized loss on securities available for sale, net of tax | 8,708 |  |  | 8,708
Net loss on cash flow hedging derivative instruments | (1,341) |  |  | (1,341)
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 15 |  |  | 15
Unrecognized gain (loss) for post-retirement benefits, net of tax | (13) |  |  | (13)
Comprehensive income | 32,894 |  | 25,525 | 7,369
Cash dividends declared | (12,963) |  | (12,963) |
Equity compensation expense | 565 | $ 565 |  |
Payment for repurchase of common stock (in shares) |  | (7,178) |  |
Payment for repurchase of common stock | (183) |  | (183) |
Issuance of restricted stock (in shares) |  | 19,087 |  |
Issuance of restricted stock | 0 |  |  |
Proceeds from sale of common stock (in shares) |  | 24,650 |  |
Proceeds from sale of common stock | $ 653 | $ 653 |  |
Balance (in shares) at Dec. 31, 2019 | 10,899,210 | 10,899,210 |  |
Ending balance at Dec. 31, 2019 | $ 212,508 | $ 64,073 | 144,839 | 3,596
Beginning balance at Mar. 31, 2019 | 197,787 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 6,395 |  |  |
Net unrealized loss on securities available for sale, net of tax | 4,289 |  |  |
Net loss on cash flow hedging derivative instruments | (898) |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 4 |  |  |
Ending balance at Jun. 30, 2019 | 204,593 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 6,288 |  |  |
Net unrealized loss on securities available for sale, net of tax | 936 |  |  |
Net loss on cash flow hedging derivative instruments | (340) |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 1 |  |  |
Ending balance at Sep. 30, 2019 | 208,489 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 6,686 |  |  |
Net unrealized loss on securities available for sale, net of tax | (29) |  |  |
Net loss on cash flow hedging derivative instruments | 362 |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | $ 7 |  |  |
Balance (in shares) at Dec. 31, 2019 | 10,899,210 | 10,899,210 |  |
Ending balance at Dec. 31, 2019 | $ 212,508 | $ 64,073 | 144,839 | 3,596
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 6,495 |  |  |
Net unrealized loss on securities available for sale, net of tax | 4,233 |  |  |
Net loss on cash flow hedging derivative instruments | (4,870) |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 8 |  |  |
Ending balance at Mar. 31, 2020 | $ 215,257 |  |  |
Balance (in shares) at Dec. 31, 2019 | 10,899,210 | 10,899,210 |  |
Beginning balance at Dec. 31, 2019 | $ 212,508 | $ 64,073 | 144,839 | 3,596
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 27,129 |  | 27,129 |
Net unrealized loss on securities available for sale, net of tax | 1,352 |  |  | 1,352
Net loss on cash flow hedging derivative instruments | (5,029) |  |  | (5,029)
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 49 |  |  | 49
Unrecognized gain (loss) for post-retirement benefits, net of tax | 4 |  |  | 4
Comprehensive income | 23,505 |  | 27,129 | (3,624)
Cash dividends declared | (13,453) |  | (13,453) |
Equity compensation expense | 652 | $ 652 |  |
Payment for repurchase of common stock (in shares) |  | (5,447) |  |
Payment for repurchase of common stock | (156) |  | (156) |
Issuance of restricted stock (in shares) |  | 27,345 |  |
Issuance of restricted stock | 0 |  |  |
Proceeds from sale of common stock (in shares) |  | 29,181 |  |
Proceeds from sale of common stock | $ 670 | $ 670 |  |
Balance (in shares) at Dec. 31, 2020 | 10,950,289 | 10,950,289 |  |
Ending balance at Dec. 31, 2020 | $ 223,726 | $ 65,395 | 158,359 | (28)
Beginning balance at Mar. 31, 2020 | 215,257 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 6,569 |  |  |
Net unrealized loss on securities available for sale, net of tax | (790) |  |  |
Net loss on cash flow hedging derivative instruments | (1,414) |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 28 |  |  |
Ending balance at Jun. 30, 2020 | 216,584 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 7,095 |  |  |
Net unrealized loss on securities available for sale, net of tax | (1,580) |  |  |
Net loss on cash flow hedging derivative instruments | 387 |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | 7 |  |  |
Ending balance at Sep. 30, 2020 | 219,440 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 6,970 |  |  |
Net unrealized loss on securities available for sale, net of tax | (511) |  |  |
Net loss on cash flow hedging derivative instruments | 868 |  |  |
Net unrealized gain on securities transferred from available for sale to held to maturity, net of tax | $ 6 |  |  |
Balance (in shares) at Dec. 31, 2020 | 10,950,289 | 10,950,289 |  |
Ending balance at Dec. 31, 2020 | $ 223,726 | $ 65,395 | $ 158,359 | $ (28)

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