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Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Operating Revenue | $ 545,745 | $ 528,623 | $ 499,516
Operating Expenses |  |  |
Salaries, wages, and benefits | 167,073 | 166,717 | 167,980
Rent and purchased transportation | 6,273 | 7,527 | 9,460
Fuel | 168,981 | 161,915 | 126,477
Operations and maintenance | 25,282 | 20,938 | 17,086
Operating taxes and licenses | 8,694 | 9,225 | 8,480
Insurance and claims | 14,906 | 13,142 | 12,526
Communications and utilities | 2,953 | 2,957 | 3,187
Depreciation | 57,158 | 57,226 | 61,949
Other operating expenses | 14,633 | 14,552 | 14,239
Gain on disposal of property and equipment | (15,109) | (32,133) | (13,317)
Total operating expenses | 450,844 | 422,066 | 408,067
Operating income | 94,901 | 106,557 | 91,449
Interest income | 674 | 773 | 1,424
Income before income taxes | 95,575 | 107,330 | 92,873
Federal and state income taxes | 34,034 | 37,398 | 30,657
Net income | 61,541 | 69,932 | 62,216
Other comprehensive income, net of tax | 1,797 | 0 | 2,245
Comprehensive income | $ 63,338 | $ 69,932 | $ 64,461
Net income per share |  |  |
Basic | $ 0.72 | $ 0.78 | $ 0.69
Diluted | $ 0.71 | $ 0.78 | $ 0.69
Weighted average shares outstanding |  |  |
Basic | 85,892 | 89,656 | 90,689
Diluted | 86,201 | 89,673 | 90,689
Dividends declared per share | $ 1.08 | $ 0.08 | $ 1.08

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