Earnings Per Share (Tables)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
Net earnings attributable to Kirby	$	83,854		$	57,367		$	153,922		$	98,065
Undistributed earnings allocated to restricted shares		(13	)		(22	)		(13	)		(21	)
Earnings available to Kirby common stockholders – basic		83,841			57,345			153,909			98,044
Undistributed earnings allocated to restricted shares		13			22			13			21
Undistributed earnings reallocated to restricted shares		(13	)		(22	)		(13	)		(21	)
Earnings available to Kirby common stockholders – diluted	$	83,841		$	57,345		$	153,909		$	98,044
Shares outstanding:
Weighted average common stock issued and outstanding		58,190			59,829			58,329			59,905
Weighted average unvested restricted stock		(9	)		(23	)		(5	)		(13	)
Weighted average common stock outstanding – basic		58,181			59,806			58,324			59,892
Dilutive effect of stock options and restricted stock units		411			279			379			287
Weighted average common stock outstanding – diluted		58,592			60,085			58,703			60,179
Net earnings per share attributable to Kirby common stockholders:
Basic	$	1.44		$	0.96		$	2.64		$	1.64
Diluted	$	1.43		$	0.95		$	2.62		$	1.63