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Summary of Significant Accounting Policies - Share-Based Compensation (Details) - Restricted Stock - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based compensation
Compensation expense before tax	$ 386,000	$ 311,000	$ 1,210,000	$ 1,010,000.00
Compensation expense after tax	271,000	$ 219,000	863,000	$ 654,000
Unrecognized compensation expense	$ 3,180,000		$ 3,180,000

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
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