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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2017
Schedule of Basic and Diluted Earnings Per Common Share | The following table presents the calculation of basic and diluted earnings per share for our Common and Class B common stock:
Years Ended December 31, |  | 2017 |  |  | 2016 |  |  | 2015 |
Basic Earnings per Share: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Watsco, Inc. shareholders |  | $ | 208,221 |  |  | $ | 182,810 |  |  | $ | 172,929 |
Less: distributed and undistributed earnings allocated to non-vested restricted common stock |  |  | 17,430 |  |  |  | 14,806 |  |  |  | 13,634 |
Earnings allocated to Watsco, Inc. shareholders |  | $ | 190,791 |  |  | $ | 168,004 |  |  | $ | 159,295 |
Weighted-average common shares outstanding—Basic |  |  | 32,824,947 |  |  |  | 32,582,385 |  |  |  | 32,435,961 |
Basic earnings per share for Common and Class B common stock |  | $ | 5.81 |  |  | $ | 5.16 |  |  | $ | 4.91 |
Allocation of earnings for Basic: |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  | $ | 175,667 |  |  | $ | 154,021 |  |  | $ | 146,037 |
Class B common stock |  |  | 15,124 |  |  |  | 13,983 |  |  |  | 13,258 |
|  | $ | 190,791 |  |  | $ | 168,004 |  |  | $ | 159,295 |
Diluted Earnings per Share: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Watsco, Inc. shareholders |  | $ | 208,221 |  |  | $ | 182,810 |  |  | $ | 172,929 |
Less: distributed and undistributed earnings allocated to non-vested restricted common stock |  |  | 17,427 |  |  |  | 14,801 |  |  |  | 13,626 |
Earnings allocated to Watsco, Inc. shareholders |  | $ | 190,794 |  |  | $ | 168,009 |  |  | $ | 159,303 |
Weighted-average common shares outstanding—Basic |  |  | 32,824,947 |  |  |  | 32,582,385 |  |  |  | 32,435,961 |
Effect of dilutive stock options |  |  | 37,686 |  |  |  | 34,119 |  |  |  | 44,395 |
Weighted-average common shares outstanding—Diluted |  |  | 32,862,633 |  |  |  | 32,616,504 |  |  |  | 32,480,356 |
Diluted earnings per share for Common and Class B common stock |  | $ | 5.81 |  |  | $ | 5.15 |  |  | $ | 4.90 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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