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Dividends and Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 0 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 15, 2013 | May 03, 2013 | Apr. 15, 2013 | Mar. 05, 2013 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Dividends and Earnings Per Share |  |  |  |  |  |  |  |
Cash dividend declared (in dollars per share) |  | $ 0.035 |  | $ 0.03 |  |  |  |
Total dividend paid | $ 1,805 |  | $ 1,547 |  |  |  | $ 1,547 | $ 3,069
Numerator: |  |  |  |  |  |  |  |
Net income attributable to Primoris |  |  |  |  | $ 15,564 | $ 11,733 | $ 25,334 | $ 22,219
Denominator: |  |  |  |  |  |  |  |
Weighted average shares for computation of basic earnings per share |  |  |  |  | 51,562 | 51,435 | 51,510 | 51,386
Dilutive effect of shares issued to independent directors |  |  |  |  |  |  | 4 |
Dilutive effect of shares issued as part of Q3C acquisition |  |  |  |  |  |  | 1 |
Dilutive effect of unvested restricted stock units |  |  |  |  | 64 |  | 32 |
Weighted average shares for computation of diluted earnings per share |  |  |  |  | 51,626 | 51,435 | 51,547 | 51,386
Earnings per share: |  |  |  |  |  |  |  |
Basic earnings per share (in dollars per share) |  |  |  |  | $ 0.30 | $ 0.23 | $ 0.49 | $ 0.43
Diluted earnings per share (in dollars per share) |  |  |  |  | $ 0.30 | $ 0.23 | $ 0.49 | $ 0.43

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