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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Operating revenue | $ 302,608 | $ 262,046
Operating expenses: |  |
Purchased transportation | 139,666 | 117,695
Salaries, wages and employee benefits | 69,581 | 61,928
Operating leases | 17,964 | 15,601
Depreciation and amortization | 10,690 | 10,033
Insurance and claims | 7,153 | 5,806
Fuel expense | 5,554 | 3,680
Other operating expenses | 27,765 | 23,560
Total operating expenses | 278,373 | 238,303
Income from operations | 24,235 | 23,743
Other income (expense): |  |
Interest expense | (371) | (282)
Other, net | 0 | (26)
Total other income (expense) | (371) | (308)
Income before income taxes | 23,864 | 23,435
Income taxes | 6,123 | 8,854
Net income and comprehensive income | $ 17,741 | $ 14,581
Net income per share: |  |
Basic (in dollars per share) | $ 0.60 | $ 0.48
Diluted (in dollars per share) | 0.60 | 0.48
Common Stock [Member] |  |
Dividends per share: |  |
Dividends per share (in dollars per share) | $ 0.15 | $ 0.15

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