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Unaudited Pro Forma Financial Information from Joint Venture (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012
Business Acquisition, Pro Forma Information [Line Items] |  |
Revenues | $ 1,036,245 | $ 1,740,222
Net income | 60,428 | 73,601
Less: net income attributable to noncontrolling interest | 21,629 | 26,710
Net income attributable to Watsco, Inc. | $ 38,799 | $ 46,891
Diluted earnings per share for Common and Class B common stock | $ 1.13 | $ 1.36

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