Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement Of Stockholders Equity [Abstract]
Cash dividends declared per share	$ 0.33	$ 0.31	$ 0.95	$ 0.91
Purchase of treasury shares, shares	10,448	8,720	10,448	16,826

Number of shares that have been repurchased during the period and are being held in treasury.

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Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration