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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Income Statement [Abstract] |  |  |
REVENUES | $ 1,861,489 | $ 1,945,023 | $ 1,809,807
COSTS AND EXPENSES: |  |  |
Cost of revenues (exclusive of items shown separately below) | 1,178,412 | 1,105,886 | 992,704
Selling, general and administrative expenses | 185,165 | 175,749 | 151,286
Depreciation and amortization | 213,128 | 214,899 | 179,905
Loss on disposition of assets, net | 9,371 | 6,099 | 3,831
Operating profit | 275,413 | 442,390 | 482,081
Interest expense | (1,822) | (1,976) | (3,453)
Interest income | 419 | 30 | 18
Other income, net | 2,260 | 2,175 | 169
Income before income taxes | 276,270 | 442,619 | 478,815
Income tax provision | 109,375 | 168,183 | 182,434
Net income | $ 166,895 | $ 274,436 | $ 296,381
EARNINGS PER SHARE |  |  |
Basic (in dollars per share) | $ 0.77 | $ 1.28 | $ 1.36
Diluted (in dollars per share) | $ 0.77 | $ 1.27 | $ 1.35
Dividends paid per share (in dollars per share) | $ 0.40 | $ 0.52 | $ 0.21

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