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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Operating Revenue | $ 528,623 | $ 499,516 | $ 459,539
Operating Expenses |  |  |
Salaries, wages, and benefits | 166,717 | 167,980 | 168,716
Rent and purchased transportation | 7,527 | 9,460 | 11,138
Fuel | 161,915 | 126,477 | 104,246
Operations and maintenance | 20,938 | 17,086 | 14,913
Operating taxes and licenses | 9,225 | 8,480 | 9,286
Insurance and claims | 13,142 | 12,526 | 16,629
Communications and utilities | 2,957 | 3,187 | 3,655
Depreciation | 57,226 | 61,949 | 58,730
Other operating expenses | 14,552 | 14,239 | 12,970
Gain on disposal of property and equipment | (32,133) | (13,317) | (19,708)
Total operating expenses | 422,066 | 408,067 | 380,575
Operating income | 106,557 | 91,449 | 78,964
Interest income | 773 | 1,424 | 2,338
Income before income taxes | 107,330 | 92,873 | 81,302
Federal and state income taxes | 37,398 | 30,657 | 24,353
Net income | $ 69,932 | $ 62,216 | $ 56,949
Earnings per share |  |  |
Basic | $ 0.78 | $ 0.69 | $ 0.62
Diluted | $ 0.78 | $ 0.69 | $ 0.62
Weighted average shares outstanding |  |  |
Basic | 89,656 | 90,689 | 91,131
Diluted | 89,673 | 90,689 | 91,131
Dividends declared per share | $ 0.08 | $ 1.08 | $ 0.08

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