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Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Income Statement [Abstract] |  |  |  |
Operating Revenue | $ 226,785 | $ 133,992 | $ 451,265 | $ 268,265
Operating Expenses |  |  |  |
Salaries, wages and benefits | 71,240 | 40,939 | 142,185 | 81,537
Rent and purchased transportation | 13,741 | 1,325 | 28,252 | 2,623
Fuel | 59,338 | 38,637 | 122,563 | 81,615
Operations and maintenance | 9,776 | 3,828 | 19,897 | 9,269
Operating taxes and licenses | 5,319 | 2,468 | 10,165 | 4,884
Insurance and claims | 4,370 | 4,744 | 11,465 | 7,604
Communications and utilities | 1,553 | 699 | 3,383 | 1,472
Depreciation and amortization | 26,668 | 16,930 | 51,241 | 31,995
Other operating expenses | 7,997 | 3,691 | 16,687 | 7,506
Gain on disposal of property and equipment | (13,859) | (8,644) | (15,903) | (19,823)
Total operating expenses | 186,143 | 104,617 | 389,935 | 208,682
Operating income | 40,642 | 29,375 | 61,330 | 59,583
Interest income | 106 | 129 | 142 | 253
Interest expense | (132) | 0 | (287) | 0
Income before income taxes | 40,616 | 29,504 | 61,185 | 59,836
Federal and state income taxes | 14,144 | 10,366 | 20,634 | 20,962
Net income | 26,472 | 19,138 | 40,551 | 38,874
Other comprehensive income, net of tax | 0 | 600 | 0 | 600
Comprehensive income | $ 26,472 | $ 19,738 | $ 40,551 | $ 39,474
Net income per share |  |  |  |
Basic | $ 0.30 | $ 0.23 | $ 0.46 | $ 0.46
Diluted | $ 0.30 | $ 0.23 | $ 0.46 | $ 0.46
Weighted average shares outstanding |  |  |  |
Basic | 87,728 | 84,789 | 87,716 | 84,780
Diluted | 87,900 | 85,039 | 87,908 | 85,042
Dividends declared per share | $ 0.02 | $ 0.02 | $ 0.04 | $ 0.04

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