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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2011
Summary Of Significant Accounting Policies [Abstract] |
Schedule Of Comprehensive Income |
Years Ended December 31, |  | 2011 |  |  | 2010 |  |  | 2009 |
Net income |  | $ | 137,742 |  |  | $ | 111,722 |  |  | $ | 51,573 |
Changes in unrealized losses on derivative instruments, net of income tax expense of $146, $117 and $205, respectively |  |  | 238 |  |  |  | 194 |  |  |  | 346 |
Changes in unrealized losses on available-for-sale securities, net of income tax expense (benefit) of $3, $19 and $(29), respectively |  |  | 3 |  |  |  | 34 |  |  |  | (42 | )
Comprehensive income |  |  | 137,983 |  |  |  | 111,950 |  |  |  | 51,877 |
Less: comprehensive income attributable to noncontrolling interest |  |  | 47,292 |  |  |  | 30,962 |  |  |  | 8,259 |
Comprehensive income attributable to Watsco, Inc. |  | $ | 90,691 |  |  | $ | 80,988 |  |  | $ | 43,618 |

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- Definition Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 220 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 45 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e526-108580 + Details
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