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UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019
Dividend (in dollars per share) | $ 0.26 | $ 0.23 | $ 0.23 | $ 0.20 | $ 0.20 | $ 0.20 |
Tax provision on defined benefit pension plan |  | $ 283 |  |  |  |  |
Tax benefit on interest rate swap | $ 55 | $ 3 | $ 319 | $ 40 | $ 160 | $ 384 |
Accounting Standards Update 2016-13 |  |  |  |  |  |  |
Tax effect of new accounting standard |  |  |  |  |  |  | $ 75

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