Earnings Per Share

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

Earnings Per Share

(10) Earnings Per Share

The following table presents the components of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2022			2021			2022			2021
Net earnings (loss) attributable to Kirby	$	39,091		$	(264,730	)	$	84,982		$	(257,915	)
Undistributed earnings allocated to restricted shares		(18	)		—			(27	)		—
Earnings (loss) available to Kirby common stockholders – basic		39,073			(264,730	)		84,955			(257,915	)
Undistributed earnings allocated to restricted shares		18			—			27			—
Undistributed earnings reallocated to restricted shares		(18	)		—			(27	)		—
Earnings (loss) available to Kirby common stockholders – diluted	$	39,073		$	(264,730	)	$	84,955		$	(257,915	)
Shares outstanding:
Weighted average common stock issued and outstanding		59,923			60,109			60,107			60,095
Weighted average unvested restricted stock		(27	)		(47	)		(19	)		(51	)
Weighted average common stock outstanding – basic		59,896			60,062			60,088			60,044
Dilutive effect of stock options and restricted stock units		286			—			281			—
Weighted average common stock outstanding – diluted		60,182			60,062			60,369			60,044
Net earnings (loss) per share attributable to Kirby common stockholders:
Basic	$	0.65		$	(4.41	)	$	1.41		$	(4.30	)
Diluted	$	0.65		$	(4.41	)	$	1.41		$	(4.30	)

Certain outstanding options to purchase approximately 0.4 million and 0.6 million shares of common stock were excluded in the computation of diluted earnings per share as of September 30, 2022 and 2021, respectively, as such stock options would have been antidilutive. Certain outstanding RSUs to convert to 11,000 and 565,000 shares of common stock were also excluded in the computation of diluted earnings per share as of September 30, 2022 and 2021, respectively, as such RSUs would have been antidilutive.