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Stock-Based Compensation | 3 Months Ended
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Aug. 29, 2015
Stock-Based Compensation [Abstract] |
Stock-Based Compensation | STOCK-BASED COMPENSATION The company's stock-based compensation expense for the three month periods ended August 29, 2015 and August 30, 2014 was $4.0 million and $3.0 million, respectively. The related income tax effect for the three month periods ended August 29, 2015 and August 30, 2014 was $1.4 million and $1.1 million, respectively. Stock-based compensation expense recognized in the Condensed Consolidated Statements of Comprehensive Income for the three month periods ended August 29, 2015 and August 30, 2014 has been reduced for estimated forfeitures, as it is based on awards ultimately expected to vest. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ. Forfeitures are estimated based on historical experience. For the three month period ended August 29, 2015, the company issued 17,390 shares of common stock related to the exercise of stock options, 160,319 shares of common stock related to the vesting of restricted stock units, and 55,825 shares of common stock related to the vesting of performance share units. For the three month period ended August 30, 2014, the company issued 30,878 shares of common stock related to the exercise of stock options, 112,615 shares of common stock related to the vesting of restricted stock units, and no shares of common stock related to the vesting of performance share units. Stock Option Plans The company has stock option plans under which options to purchase the company's stock are granted to employees, directors, and consultants at a price not less than the market price of the company's common stock on the date of grant. Under the current award program, most options become exercisable between one year and three years from date of grant and expire ten years from date of grant. Most options are subject to graded vesting with the related compensation expense recognized on a straight-line basis over the requisite service period. The company estimates the issuance date fair value of stock options on the date of grant using the Black-Scholes model. Herman Miller Consumer Holdings Stock (HMCH) Option Plan Certain employees were granted options to purchase stock of HMCH at a price not less than the market price of HMCH common stock on the date of grant. For the grants of options under the award program, options are potentially exercisable between one year and five years from the date of grant and expire at the end of the window period that follows the fifth anniversary of the grant date. Vesting is based on the performance of HMCH over a period of five years. These options have been classified as liability awards as the holders have the right to put the underlying shares to the company upon exercise. Given this, the awards are measured at fair value at the end of each reporting period and compensation expense is adjusted accordingly to reflect the fair value over the requisite service period. The company estimates the issuance date fair value of HMCH stock options on the date of grant, and at the end of each reporting period, using the Black-Scholes model. Employee Stock Purchase Program Under the terms of the company's Employee Stock Purchase Plan, 4 million shares of authorized common stock were reserved for purchase by plan participants at 85 percent of the market price. The company recognizes pre-tax compensation expense related to the market value discount. Restricted Stock Grants The company periodically grants restricted common stock to certain key employees. Shares are granted in the name of the employee, who has all the rights of a shareholder, subject to certain restrictions on transferability and risk of forfeiture. The grants are subject to either cliff-based or graded vesting over a period not exceeding five years, and are subject to forfeiture if the employee ceases to be employed by the company for certain reasons. After the vesting period, the risk of forfeiture and restrictions on transferability lapse. The compensation expense for these awards is based on the closing stock price on the date of grant. The company recognizes the related compensation expense on a straight-line basis over the requisite service period. Restricted Stock Units The company grants restricted stock units to certain key employees. The awards generally cliff-vest after a three or five-year service period, with prorated vesting under certain circumstances and full or partial accelerated vesting upon retirement. Each restricted stock unit represents one equivalent share of the company's common stock to be issued, free of restrictions, after the vesting period. The compensation expense for these awards is based on the closing stock price on the date of grant. Compensation expense related to these awards is recognized over the requisite service period. Dividend equivalent awards are credited quarterly. The units do not entitle participants to the rights of shareholders of common stock, such as voting rights, until shares are issued after the vesting period. Performance Share Units The company has granted performance share units to certain key employees. Each unit represents one equivalent share of the company's common stock. The number of common shares ultimately issued in connection with these performance share units is determined based on the company's financial performance over the related three-year service period or the company's financial performance based on certain total shareholder return results as compared to a selected group of peer companies. Compensation expense is determined based on the grant-date fair value and the number of common shares projected to be issued and is recognized over the requisite service period.

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- Definition 14. Stock-Based Compensation [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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