Earnings Per Share

6 Months Ended

Jun. 30, 2021

(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 June 30,						Six months ended June 30,
	2021			2020			2021			2020
Net earnings (loss) attributable to Kirby	$	10,190		$	25,002		$	6,815		$	(322,239	)
Undistributed earnings allocated to restricted shares		(8	)		(46	)		(6	)		—
Earnings (loss) available to Kirby common stockholders – basic		10,182			24,956			6,809			(322,239	)
Undistributed earnings allocated to restricted shares		8			46			6			—
Undistributed earnings reallocated to restricted shares		(8	)		(46	)		(6	)		—
Earnings (loss) available to Kirby common stockholders – diluted	$	10,182		$	24,956		$	6,809		$	(322,239	)

Shares outstanding:
Weighted average common stock issued and outstanding		60,101			60,023			60,088			60,003
Weighted average unvested restricted stock		(48	)		(111	)		(53	)		(105	)
Weighted average common stock outstanding – basic		60,053			59,912			60,035			59,898
Dilutive effect of stock options and restricted stock units		221			25			185			—
Weighted average common stock outstanding – diluted		60,274			59,937			60,220			59,898

Net earnings (loss) per share attributable to Kirby common stockholders:
Basic	$	0.17		$	0.42		$	0.11		$	(5.38	)
Diluted	$	0.17		$	0.42		$	0.11		$	(5.38	)

Certain outstanding options to purchase approximately 550,000 and 681,000 shares of common stock were excluded in the computation of diluted earnings per share as of June 30, 2021 and 2020, respectively, as such stock options would have been antidilutive. Certain outstanding RSUs to convert to 5,000 and 162,000 shares of common stock were also excluded in the computation of diluted earnings per share as of June 30, 2021 and 2020, respectively, as such RSUs would have been antidilutive.