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Stock-Based Compensation (Tables) | 12 Months Ended
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May 31, 2012
Share-based Compensation [Abstract] |
Assumptions used to determine fair value of options | The fair value of these options was estimated at the date of grant using a Black-Scholes option-pricing model with the following assumptions:
| 2012 |  | 2011 |  | 2010
Risk-free interest rate | 2.4 | % |  | 2.5 | % |  | 3.9 | %
Dividend yield | 1.7 | % |  | 1.5 | % |  | 1.3 | %
Expected volatility of Cintas' common stock | 37.0 | % |  | 30.0 | % |  | 30.0 | %
Expected life of the option in years | 7.5 |  |  | 7.5 |  |  | 7.5 |
Stock options granted and outstanding under either the 2005 Equity Compensation Plan or under previously adopted plans | The information presented in the following table relates primarily to stock options granted and outstanding under either the 2005 Equity Compensation Plan or under previously adopted plans:
| Shares |  | Weighted Average Exercise Price
Outstanding, May 31, 2009 (1,914,710 shares exercisable) | 6,359,424 |  |  | $ | 38.91 |
Granted | 1,070,798 |  |  | 28.52 |
Canceled | (963,016 | ) |  | 35.98 |
Exercised | — |  |  | — |
Outstanding, May 31, 2010 (1,838,530 shares exercisable) | 6,467,206 |  |  | 37.63 |
Granted | 2,030,764 |  |  | 32.42 |
Canceled | (833,267 | ) |  | 38.76 |
Exercised | — |  |  | — |
Outstanding, May 31, 2011 (1,945,207 shares exercisable) | 7,664,703 |  |  | 36.12 |
Granted | 1,638,907 |  |  | 36.26 |
Canceled | (1,591,480 | ) |  | 36.90 |
Exercised | (103,013 | ) |  | 32.66 |
Outstanding, May 31, 2012 (2,105,702 shares exercisable) | 7,609,117 |  |  | $ | 36.04 |
Information related to stock options outstanding | The following table summarizes the information related to stock options outstanding at May 31, 2012:
|  |  | Outstanding Options |  | Exercisable Options
Range of Exercise Prices | Number Outstanding |  | Average Remaining Option Life |  | Weighted Average Exercise Price |  | Number Exercisable |  | Weighted Average Exercise Price
$ 20.29 – $ 31.00 | 1,725,722 |  | 7.50 |  | $ | 26.22 |  |  | 176,768 |  |  | $ | 26.97 |
31.01 – 34.27 | 1,279,826 |  | 8.61 |  | 33.99 |  |  | 60,390 |  |  | 33.50 |
34.28 – 39.36 | 2,410,094 |  | 6.77 |  | 37.49 |  |  | 622,774 |  |  | 38.69 |
39.37 – 50.47 | 2,193,475 |  | 2.48 |  | 42.51 |  |  | 1,245,770 |  |  | 42.65 |
$ 20.29 – $ 50.47 | 7,609,117 |  | 6.01 |  | $ | 36.04 |  |  | 2,105,702 |  |  | $ | 39.90 |
Restricted stock awards granted and outstanding under either the 2005 Equity Compensation Plan or under previously adopted plans | The information presented in the following table relates to restricted stock awards granted and outstanding under either the 2005 Equity Compensation Plan or under previously adopted plans:
| Shares |  | Weighted Average Grant Price
Outstanding, unvested grants at May 31, 2009 | 981,369 |  |  | $ | 30.29 |
Granted | 597,514 |  |  | 24.63 |
Canceled | (53,278 | ) |  | 27.85 |
Vested | (118,254 | ) |  | 36.57 |
Outstanding, unvested grants at May 31, 2010 | 1,407,351 |  |  | 27.45 |
Granted | 712,721 |  |  | 31.59 |
Canceled | (66,754 | ) |  | 25.54 |
Vested | (135,936 | ) |  | 39.26 |
Outstanding, unvested grants at May 31, 2011 | 1,917,382 |  |  | 28.22 |
Granted | 452,267 |  |  | 35.95 |
Canceled | (188,685 | ) |  | 30.62 |
Vested | (291,968 | ) |  | 27.60 |
Outstanding, unvested grants at May 31, 2012 | 1,888,996 |  |  | $ | 29.93 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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