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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Noncontrolling Interests [Member]
Total
Balance at beginning of year at Dec. 31, 2013 $ 5,978 $ 410,615 $ (16,793) $ 1,692,140 $ (81,254) $ 11,467  
Excess (deficit) of proceeds received upon exercise of stock options and issuance of restricted stock over cost of treasury stock issued   8,345          
Tax benefit (expense) realized from equity compensation plans   6,119         $ 6,119
Issuance of restricted stock, net of forfeitures   (8,195)          
Amortization of unearned compensation   11,591          
Acquisitions of noncontrolling interests   0       0  
Net earnings attributable to Kirby for the year       282,006     282,006
Purchase of treasury stock (35,000 in 2016 and 3,316,000 in 2015)         (15,321)    
Cost of treasury stock issued upon exercise of stock options and issuance of restricted stock (170,000 in 2016, 166,000 in 2015 and 211,000 in 2014)         3,049    
Net earnings attributable to noncontrolling interests           2,602 2,602
Return of investment to noncontrolling interests           (3,192) 3,192
Other comprehensive income (loss), net of taxes     (44,244)       (44,244)
Balance at end of year at Dec. 31, 2014 5,978 428,475 (61,037) 1,974,146 (93,526) 10,877  
Excess (deficit) of proceeds received upon exercise of stock options and issuance of restricted stock over cost of treasury stock issued   3,530          
Tax benefit (expense) realized from equity compensation plans   964         964
Issuance of restricted stock, net of forfeitures   (9,290)          
Amortization of unearned compensation   11,104          
Acquisitions of noncontrolling interests   0       0  
Net earnings attributable to Kirby for the year       226,684     226,684
Purchase of treasury stock (35,000 in 2016 and 3,316,000 in 2015)         (241,105)    
Cost of treasury stock issued upon exercise of stock options and issuance of restricted stock (170,000 in 2016, 166,000 in 2015 and 211,000 in 2014)         6,537    
Net earnings attributable to noncontrolling interests           1,286 1,286
Return of investment to noncontrolling interests           (1,778) 1,778
Other comprehensive income (loss), net of taxes     16,351       16,351
Balance at end of year at Dec. 31, 2015 5,978 434,783 (44,686) 2,200,830 (328,094) 10,385 2,279,196
Excess (deficit) of proceeds received upon exercise of stock options and issuance of restricted stock over cost of treasury stock issued   (755)          
Tax benefit (expense) realized from equity compensation plans   (824)         (824)
Issuance of restricted stock, net of forfeitures   (10,218)          
Amortization of unearned compensation   11,675          
Acquisitions of noncontrolling interests   (2,202)       (6,258)  
Net earnings attributable to Kirby for the year       141,406     141,406
Purchase of treasury stock (35,000 in 2016 and 3,316,000 in 2015)         (1,827)    
Cost of treasury stock issued upon exercise of stock options and issuance of restricted stock (170,000 in 2016, 166,000 in 2015 and 211,000 in 2014)         9,573    
Net earnings attributable to noncontrolling interests           1,398 1,398
Return of investment to noncontrolling interests           (1,976) 1,976
Other comprehensive income (loss), net of taxes     (6,321)       (6,321)
Balance at end of year at Dec. 31, 2016 $ 5,978 $ 432,459 $ (51,007) $ 2,342,236 $ (320,348) $ 3,549 $ 2,412,867