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Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2013 | Jun. 30, 2012 | Jun. 29, 2013 | Jun. 30, 2012
Condensed Consolidated Income Statements |  |  |  |
Revenues | $ 65,203 | $ 67,813 | $ 128,333 | $ 136,945
Costs of services | 45,042 | 45,448 | 87,057 | 91,935
Gross profit | 20,161 | 22,365 | 41,276 | 45,010
Selling, general and administrative expenses | 15,380 | 16,924 | 31,180 | 34,791
Depreciation and amortization | 1,611 | 2,633 | 3,152 | 4,105
Income from operations | 3,170 | 2,808 | 6,944 | 6,114
Interest income | 21 | 64 | 82 | 130
Interest expense | (175) | (79) | (242) | (159)
Other income (expense), net | 352 | (98) | (39) | (137)
Income before provision for income taxes | 3,368 | 2,695 | 6,745 | 5,948
Provision for income taxes | (2,017) | (1,922) | (2,559) | (4,739)
Net income | 1,351 | 773 | 4,186 | 1,209
Net (income) loss attributable to noncontrolling interest, net of tax | 58 | (54) | 192 | 29
Net income attributable to CRA International, Inc. | $ 1,409 | $ 719 | $ 4,378 | $ 1,238
Net income per share attributable to CRA International, Inc: |  |  |  |
Basic (in dollars per share) | $ 0.14 | $ 0.07 | $ 0.43 | $ 0.12
Diluted (in dollars per share) | $ 0.14 | $ 0.07 | $ 0.43 | $ 0.12
Weighted average number of shares outstanding: |  |  |  |
Basic (in shares) | 10,100 | 10,242 | 10,085 | 10,279
Diluted (in shares) | 10,188 | 10,381 | 10,174 | 10,439

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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