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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
All award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share issued	1,000,000
Shares granted	100,000
Outstanding, Aggregate Intrinsic Value	$ 1,000
All award [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share granted not exceed	$ 150
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	58,700	66,000	57,100
Vesting period	5 years
Total unrecognized compensation cost	$ 718
Total unrecognized compensation cost, weighted average period	2 years 14 days
Percentage of RSU granted to employees per year	20.00%
Percentage of RSU granted to non-employee directors per year	100.00%
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	64,600	63,600	62,400
Total unrecognized compensation cost	$ 1,125
Total unrecognized compensation cost, weighted average period	1 year 8 months 26 days
Percentage of RSU granted to employees per year	0.00%
Percentage of RSU granted to non-employee directors per year	150.00%

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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-Publisher FASB
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-Topic 718
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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