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Income Taxes (Tables)

3 Months Ended

Mar. 31, 2021

Income Tax Disclosure [Abstract]

Summary of Significant Factors Impact on Difference Between Effective Tax Rate and Federal Statutory Rate

The following table summarizes the significant factors impacting the difference between our effective tax rate and the federal statutory rate for the three months ended March 31 (dollars in thousands):

		2021								2020
Federal income taxes at statutory rates		$	16,838				21.0	%		$	11,961				21.0	%
Increase (decrease) in tax resulting from:
Tax effect of regulatory treatment of utility       plant differences			(3,240	)			(4.0	)			(2,402	)			(4.2	)
State income tax expense			552				0.7				1,227				2.1
Settlement of equity awards			930				1.1				165				0.3
Other			(2,916	)			(3.6	)			(2,419	)			(4.2	)
Total income tax expense		$	12,164				15.2	%		$	8,532				15.0	%

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- References

No definition available.

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- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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