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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
New common shares issued for exercise of stock options, shares	21,356	38,235	40,917
Cash dividend declared per common share	$ 0.100	$ 0.100	$ 0.095
COMMON STOCK
New common shares issued for exercise of stock options, shares	21,356	38,235	40,917
TREASURY STOCK
Treasury stock, purchased at cost, shares		35,962	602,349
CAPITAL SURPLUS
New common shares issued for exercise of stock options, shares	21,356	38,235	40,917
RETAINED EARNINGS
Cash dividend declared per common share	$ 0.100	$ 0.100	$ 0.095

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

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Number of share options (or share units) exercised during the current period.

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