Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Unrealized holding (losses) gains arising during period, taxes	$ 78	$ 181	$ 355	$ 169
Accretion of net unrealized losses on securities transferred during the period, taxes	35	51	141	166
Pension liability adjustment, taxes	$ 159	$ 142	$ 476	$ 422
Conversion of Class B Common Stock to Class A Common Stock, shares	11,400	3,000	17,500	4,520
Class A Common Stock [Member]
Cash dividends, per share	$ 0.36	$ 0.14	$ 0.72	$ 0.38
Class B Common Stock [Member]
Cash dividends, per share	$ 0.18	$ 0.07	$ 0.36	$ 0.19

Other comprehensive income loss transfers from accretion of net unrealized losses tax.

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Stock converted during period shares converted.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

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Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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