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Note 15 - Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Quarterly Financial Information [Table Text Block]

		Quarter
		First				Second				Third				Fourth
2020:
Operating revenues		$	2,280,826			$	2,145,573			$	2,472,523			$	2,737,652
Operating income		$	154,741			$	175,183			$	175,503			$	207,691
Net earnings		$	104,834			$	121,698			$	125,496			$	154,007
Basic earnings per share		$	0.99			$	1.15			$	1.19			$	1.46
Diluted earnings per share		$	0.98			$	1.14			$	1.18			$	1.44
2019:
Operating revenues		$	2,089,627			$	2,261,647			$	2,363,660			$	2,450,323
Operating income		$	167,795			$	193,093			$	167,862			$	205,074
Net earnings		$	119,601			$	133,633			$	118,410			$	144,676
Basic earnings per share		$	1.10			$	1.24			$	1.11			$	1.36
Diluted earnings per share		$	1.09			$	1.23			$	1.10			$	1.35

X

- Definition

Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306

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X

- References

No definition available.

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