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CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues: |  |  |
Marine transportation | $ 1,471,893 | $ 1,663,090 | $ 1,770,684
Diesel engine services | 298,780 | 484,442 | 795,634
Total revenues | 1,770,673 | 2,147,532 | 2,566,318
Costs and expenses: |  |  |
Costs of sales and operating expenses | 1,126,952 | 1,362,366 | 1,694,882
Selling, general and administrative | 174,752 | 193,237 | 210,416
Taxes, other than on income | 22,730 | 20,699 | 16,677
Depreciation and amortization | 200,917 | 192,240 | 169,312
Loss (gain) on disposition of assets | 127 | (1,672) | (781)
Total costs and expenses | 1,525,478 | 1,766,870 | 2,090,506
Operating income | 245,195 | 380,662 | 475,812
Equity in earnings of affiliates | 532 | 451 | 384
Other expense | (291) | (663) | (345)
Interest expense | (17,690) | (18,738) | (21,461)
Earnings before taxes on income | 227,746 | 361,712 | 454,390
Provision for taxes on income | (84,942) | (133,742) | (169,782)
Net earnings | 142,804 | 227,970 | 284,608
Less: Net earnings attributable to noncontrolling interests | (1,398) | (1,286) | (2,602)
Net earnings attributable to Kirby | $ 141,406 | $ 226,684 | $ 282,006
Net earnings per share attributable to Kirby common stockholders: |  |  |
Basic (in dollars per share) | $ 2.63 | $ 4.12 | $ 4.95
Diluted (in dollars per share) | $ 2.62 | $ 4.11 | $ 4.93

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