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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2011
Earnings Per Share [Abstract] |
Schedule Of Basic And Diluted Earnings Per Common Share |
Years Ended December 31, |  | 2011 |  |  | 2010 |  |  | 2009 |
Basic Earnings per Share: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Watsco, Inc. shareholders |  | $ | 90,450 |  |  | $ | 80,760 |  |  | $ | 43,314 |
Less: distributed and undistributed earnings allocated to non-vested (restricted) common stock |  |  | 6,045 |  |  |  | 4,775 |  |  |  | 3,320 |
Earnings allocated to Watsco, Inc. shareholders |  | $ | 84,405 |  |  | $ | 75,985 |  |  | $ | 39,994 |
Weighted-average Common and Class B common shares outstanding for basic earnings per share |  |  | 30,678,206 |  |  |  | 30,467,212 |  |  |  | 28,223,275 |
Basic earnings per share for Common and Class B common stock |  | $ | 2.75 |  |  | $ | 2.49 |  |  | $ | 1.42 |
Allocation of earnings for Basic: |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  | $ | 76,574 |  |  | $ | 68,856 |  |  | $ | 35,963 |
Class B common stock |  |  | 7,831 |  |  |  | 7,129 |  |  |  | 4,031 |
|  | $ | 84,405 |  |  | $ | 75,985 |  |  | $ | 39,994 |
Diluted Earnings per Share: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Watsco, Inc. shareholders |  | $ | 90,450 |  |  | $ | 80,760 |  |  | $ | 43,314 |
Less: distributed and undistributed earnings allocated to non-vested (restricted) common stock |  |  | 6,042 |  |  |  | 4,772 |  |  |  | 3,320 |
Earnings allocated to Watsco, Inc. shareholders |  | $ | 84,408 |  |  | $ | 75,988 |  |  | $ | 39,994 |
Weighted-average Common and Class B common shares outstanding for basic earnings per share |  |  | 30,678,206 |  |  |  | 30,467,212 |  |  |  | 28,223,275 |
Effect of dilutive stock options |  |  | 75,085 |  |  |  | 111,396 |  |  |  | 298,162 |
Weighted-average Common and Class B common shares outstanding for diluted earnings per share |  |  | 30,753,291 |  |  |  | 30,578,608 |  |  |  | 28,521,437 |
Diluted earnings per share for Common and Class B common stock |  | $ | 2.74 |  |  | $ | 2.49 |  |  | $ | 1.40 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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