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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
Revenues | $ 1,460,150 | $ 941,765 | $ 467,010
Cost of revenues | 1,274,947 | 818,976 | 391,435
Gross profit | 185,203 | 122,789 | 75,575
Selling, general and administrative expenses | 86,204 | 64,985 | 34,781
Merger related stock expense |  |  | 390
Operating income | 98,999 | 57,804 | 40,404
Other income (expense): |  |  |
Income from non-consolidated investments | 4,018 | 4,630 | 8,753
Foreign exchange (loss) gain | (96) | 250 | 293
Other expense | (1,088) | (1,429) |
Interest income | 331 | 616 | 640
Interest expense | (5,431) | (6,196) | (1,979)
Income from continuing operations, before provision for income taxes | 96,733 | 55,675 | 48,111
Provision for income taxes | (38,174) | (22,059) | (18,350)
Income from continuing operations | 58,559 | 33,616 | 29,761
Loss on discontinued operations, net of income taxes |  |  | (3,849)
Net income | $ 58,559 | $ 33,616 | $ 25,912
Dividends per common share (in dollars per share) | $ 0.11 | $ 0.10 | $ 0.10
Basic: |  |  |
Income from continuing operations (in dollars per share) | $ 1.15 | $ 0.79 | $ 0.93
Loss on discontinued operations (in dollars per share) |  |  | $ (0.12)
Net income (in dollars per share) | $ 1.15 | $ 0.79 | $ 0.81
Diluted: |  |  |
Income from continuing operations (in dollars per share) | $ 1.14 | $ 0.72 | $ 0.86
Loss on discontinued operations (in dollars per share) |  |  | $ (0.11)
Net income (in dollars per share) | $ 1.14 | $ 0.72 | $ 0.75
Weighted average common shares outstanding: |  |  |
Basic (in shares) | 50,707 | 42,694 | 31,937
Diluted (in shares) | 51,153 | 46,878 | 34,418

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 59 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=6909708&loc=d3e1043-128460 + Details
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