Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement Of Stockholders Equity [Abstract]
Cash dividends declared per share	$ 0.62	$ 0.30	$ 0.62	$ 0.60
Purchase of treasury shares, shares		8,106		8,106

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