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Summary of Significant Accounting Policies - Share-Based Compensation (Details) - Restricted Stock - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based compensation
Compensation expense before tax	$ 392,000	$ 389,000
Compensation expense after tax	287,000	$ 217,000
Unrecognized compensation expense	$ 4,090,000.00

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

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-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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