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v3.3.1.900

Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share, Calculated using Treasury Method and Two-Class Method (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2015 | Nov. 30, 2014 | Nov. 30, 2015 | Nov. 30, 2014
Numerator for earnings per share: |  |  |  |  |
Net income attributable to RPM International Inc. stockholders |  | $ 83,433 | $ 69,766 | $ 183,248 | $ 168,845
Less: Allocation of earnings and dividends to participating securities |  | (1,571) | (1,602) | (3,068) | (3,673)
Net income available to common shareholders - basic |  | 81,862 | 68,164 | 180,180 | 165,172
Add: Undistributed earnings reallocated to unvested shareholders |  |  | 6 |  | 18
Reverse: Allocation of earnings and dividends to participating securities |  | 1,571 |  | 3,068 |
Add: Income effect of contingently issuable shares |  | 1,354 | 1,340 | 2,706 | 2,679
Net income available to common shareholders - diluted |  | $ 84,787 | $ 69,510 | $ 185,954 | $ 167,869
Denominator for basic and diluted earnings per share: |  |  |  |  |
Basic weighted average common shares |  | 129,398 | 130,028 | 129,723 | 130,061
Average diluted options |  | 3,453 | 1,063 | 3,466 | 1,064
Additional shares issuable assuming conversion of convertible securities |  | 3,883 | 3,875 | 3,883 | 3,875
Total shares for diluted earnings per share | [1],[2] | 136,734 | 134,966 | 137,072 | 135,000
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders: |  |  |  |  |
Basic Earnings Per Share of Common Stock |  | $ 0.63 | $ 0.52 | $ 1.39 | $ 1.27
Diluted Earnings Per Share of Common Stock |  | $ 0.62 | $ 0.52 | $ 1.36 | $ 1.24
[1] | For the six months ended November 30, 2014, approximately 3.0 million shares of stock granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.
[2] | For the three months ended November 30, 2014, approximately 3.2 million shares of stock granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.

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