Earnings Per Common Share Attributable to Avista Corporation Shareholders (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Common Share

The following table presents the computation of basic and diluted earnings per common share attributable to Avista Corp. shareholders for the years ended December 31 (in thousands, except per share amounts):

	2020		2019		2018
Numerator:
Net income attributable to Avista Corp. shareholders	$	129,488	$	196,979	$	136,429
Denominator:
Weighted-average number of common shares outstanding-basic		67,962		66,205		65,673
Effect of dilutive securities:
Performance and restricted stock awards		140		124		273
Weighted-average number of common shares outstanding-diluted		68,102		66,329		65,946
Earnings per common share attributable to Avista    Corp. shareholders:
Basic	$	1.91	$	2.98	$	2.08
Diluted	$	1.90	$	2.97	$	2.07