Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2024

Earnings Per Share [Abstract]

Schedule of Loss Per Share

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

	Three Months Ended September 30,						Nine Months Ended September 30,
	2024			2023			2024			2023
Net earnings attributable to Kirby	$	89,968		$	62,964		$	243,890		$	161,029
Undistributed earnings allocated to restricted shares		(24	)		(31	)		(36	)		(50	)
Earnings available to Kirby common stockholders – basic		89,944			62,933			243,854			160,979
Undistributed earnings allocated to restricted shares		24			31			36			50
Undistributed earnings reallocated to restricted shares		(23	)		(31	)		(35	)		(50	)
Earnings available to Kirby common stockholders – diluted	$	89,945		$	62,933		$	243,855		$	160,979
Shares outstanding:
Weighted average common stock issued and outstanding		57,767			59,413			58,138			59,739
Weighted average unvested restricted stock		(14	)		(30	)		(9	)		(18	)
Weighted average common stock outstanding – basic		57,753			59,383			58,129			59,721
Dilutive effect of stock options and restricted stock units		433			363			397			312
Weighted average common stock outstanding – diluted		58,186			59,746			58,526			60,033
Net earnings per share attributable to Kirby common stockholders:
Basic	$	1.56		$	1.06		$	4.20		$	2.70
Diluted	$	1.55		$	1.05		$	4.17		$	2.68