Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - shares	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Stock issued during period shares, Director Stock Purchase Plans	1,743	1,361
Common Stock [Member]
Stock issued during period, shares, Employee Stock Purchase Plans	1,647	1,152

Number of shares issued during the period as a result of an employee stock purchase plan.

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