XML 56 R46.htm IDEA: XBRL DOCUMENT v3.21.2
Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Net Income (Loss) Attributable to Parent [Abstract]        
Net earnings (loss) attributable to Kirby $ 10,190 $ 25,002 $ 6,815 $ (322,239)
Undistributed earnings allocated to restricted shares (8) (46) (6) 0
Earnings (loss) available to common stockholders, basic, total 10,182 24,956 6,809 (322,239)
Undistributed earnings allocated to restricted shares 8 46 6 0
Undistributed earnings reallocated to restricted shares (8) (46) (6) 0
Earnings (loss) available to Kirby common stockholders - diluted $ 10,182 $ 24,956 $ 6,809 $ (322,239)
Shares outstanding [Abstract]        
Weighted average common stock issued and outstanding (in shares) 60,101 60,023 60,088 60,003
Weighted average unvested restricted stock (in shares) (48) (111) (53) (105)
Weighted average common stock outstanding - basic (in shares) 60,053 59,912 60,035 59,898
Dilutive effect of stock options and restricted stock units (in shares) 221 25 185 0
Weighted average common stock outstanding - diluted (in shares) 60,274 59,937 60,220 59,898
Net earnings (loss) per share attributable to Kirby common stockholders        
Basic (in dollars per share) $ 0.17 $ 0.42 $ 0.11 $ (5.38)
Diluted (in dollars per share) $ 0.17 $ 0.42 $ 0.11 $ (5.38)
Antidilutive securities excluded from computation of earnings per share (in shares)     550,000 681,000
RSUs [Member]        
Net earnings (loss) per share attributable to Kirby common stockholders        
Antidilutive securities excluded from computation of earnings per share (in shares)     5,000,000 162,000,000