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Statements Of Operations - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement [Abstract] |  |  |
Revenue from operations | $ 2,991,517 | $ 2,972,442 | $ 2,787,897
Operating expenses |  |  |
Salaries, wages and benefits | 1,652,055 | 1,569,791 | 1,381,277
Operating supplies and expenses | 322,997 | 353,889 | 432,675
General supplies and expenses | 86,626 | 89,308 | 83,165
Operating taxes and licenses | 92,426 | 93,292 | 83,417
Insurance and claims | 37,861 | 37,368 | 36,145
Communications and utilities | 27,904 | 26,913 | 25,507
Depreciation and amortization | 189,867 | 165,343 | 146,466
Purchased transportation | 74,051 | 116,300 | 129,312
Building and office equipment rents | 7,920 | 9,620 | 10,679
Miscellaneous expenses, net | 15,975 | 12,378 | 17,947
Total operating expenses | 2,507,682 | 2,474,202 | 2,346,590
Operating income | 483,835 | 498,240 | 441,307
Non-operating expense (income) |  |  |
Interest expense | 4,332 | 5,210 | 6,610
Interest income | (58) | (209) | (108)
Other expense, net | 1,974 | 3,222 | 2,291
Total non-operating expense | 6,248 | 8,223 | 8,793
Income before income taxes | 477,587 | 490,017 | 432,514
Provision for income taxes | 181,822 | 185,327 | 165,000
Net income | $ 295,765 | $ 304,690 | $ 267,514
Earnings per share |  |  |
Basic | $ 3.56 | $ 3.57 | $ 3.10
Diluted | $ 3.56 | $ 3.57 | $ 3.10
Weighted average shares outstanding |  |  |
Basic | 83,112,012 | 85,378,480 | 86,162,137
Diluted | 83,153,659 | 85,378,480 | 86,162,137

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