Consolidated Statement of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Purchase of common stock (in shares)	68,434	2,411
Dividends paid, per share (in dollars per share)	$ 0.96	$ 0.96

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

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