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Note 13 - Acquisition of Lew Thompson & Son Trucking, Inc - Pro Forma Consolidated Results of Operations (Details) - Lew Thompson & Son Trucking, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Total revenue	$ 303,741
Net income	$ 14,687	$ 53,613	$ 49,772	$ 106,560
Basic net income per share (in dollars per share)	$ 1.13	$ 3.72	$ 3.8	$ 6.88
Diluted net income per share (in dollars per share)	$ 1.07	$ 3.6	$ 3.62	$ 6.71
Lew Thompson & Son Trucking, Inc. [Member]
Total revenue		$ 328,001	$ 878,626	$ 969,286

X

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-SubTopic 10
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-SubTopic 10
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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+ References

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-SubTopic 10
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-Section 50
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+ References

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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
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-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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