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Stock-Based Compensation | 6 Months Ended
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Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation | Stock-Based Compensation The Company maintains an Incentive Compensation Program (the “Program”) for executives, certain other employees of the Company and its operating segments and subsidiaries, and the Company’s non-employee directors. Members of the Board of Directors that receive stock-based compensation are treated as employees for accounting purposes. Shareholders approved the Program on May 6, 2015. The Program allows for awards to eligible employees of stock options, restricted stock, stock appreciation rights, performance shares and units, or other awards based on Company common stock. At June 30, 2017, 3,446,306 shares were available for grant under this plan, of which 1,295,490 shares were available for the issuance of stock awards. Stock-based compensation cost is recognized over the requisite service period, which generally equals the stated vesting period, unless the stated vesting period exceeds the date upon which an employee reaches retirement eligibility. Stock-based compensation expense is primarily included in selling and administrative expenses in the Condensed Consolidated Statements of Earnings and is as follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) |  | 2017 |  | 2016 |  | 2017 |  | 2016
Total pre-tax stock-based compensation |  | $ | 4.7 |  |  | $ | 3.9 |  |  | $ | 10.7 |  |  | $ | 8.6 |
Grants The Company awarded the following stock-based compensation grants:
|  | Six Months Ended June 30, 2017
Stock options |  | 364,675 |
Restricted stock |  | 65,637 |
Performance shares |  | 47,285 |
Restricted stock units |  | 12,952 |
For the awards granted during the six months ended June 30, 2017, approximately $23.9 million will be expensed over the requisite service period for each award, which generally is consistent with the vesting period. Stock Option Awards Options issued under the Program generally have a three year graded vesting (i.e. one-third of total award vests on each anniversary of the grant date). All options have a maximum term life of 10 years. Shares issued to cover options under the Program may be issued from shares held in treasury, from new issuances of shares, or a combination of the two. Stock-based compensation expense related to stock options were as follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) |  | 2017 |  | 2016 |  | 2017 |  | 2016
Pre-tax stock-based compensation |  | $ | 1.9 |  |  | $ | 1.4 |  |  | 3.8 |  |  | 3.0 |
The Company utilizes the Black-Scholes-Merton (“BSM”) option pricing model to determine the fair value of its stock option awards. The BSM model relies on certain assumptions to estimate an option’s fair value. The weighted-average assumptions used in the determination of fair value for stock option awards in 2017 and 2016 were as follows:
|  | 2017 |  | 2016
Expected dividend yield |  | 1.3 | % |  | 1.4 | %
Expected life in years |  | 5.58 |  |  | 5.61 |
Expected volatility |  | 25.6 | % |  | 27.5 | %
Risk-free interest rate |  | 1.9 | % |  | 1.4 | %
Weighted-average fair value per share |  | $ | 24.57 |  |  | $ | 19.30 |
The expected life of options is based on the assumption that all outstanding options will be exercised at the midpoint of the valuation (if vested) or the vesting (if unvested) dates and the options’ expiration dates, utilizing historical data. The expected volatility is based on historical volatility as well as implied volatility of the Company’s options. The risk-free interest rate is based on rates of U.S. Treasury issues with a remaining life equal to the expected life of the option. The expected dividend yield is based on the most recent annual dividend payment per share, divided by the stock price at the date of grant. Restricted Stock Awards Restricted stock awarded under the Program is generally released to the recipient after a period of approximately three years. The grant date fair value of the 2017 restricted stock awards is based on the closing market price of the stock on the date of grant. Performance Share Awards Performance shares vest based on the employee rendering approximately three years of service to the Company and the attainment of a market condition over the performance period, which is based on the Company’s relative total shareholder return versus the S&P Midcap 400 Index® over a pre-determined time period as determined by the Compensation Committee of the Board of Directors. The grant date fair value of the 2017 performance shares was estimated using a Monte-Carlo simulation approach based on a three-year measurement period. Such approach entails the use of assumptions regarding the future performance of the Company’s stock and those of the S&P Midcap 400 Index®. Those assumptions include expected volatility, risk-free interest rates, correlation coefficients, and dividend reinvestment. Dividends accrue on the performance shares during the performance period and are to be paid in cash based upon the number of awards ultimately earned. The Company expenses the compensation cost associated with the performance awards on a straight-line basis over the vesting period of approximately three years. For the purpose of determining diluted earnings per share, performance share awards are considered contingently issuable shares and are included in diluted earnings per share based upon the number of shares that would have been awarded had the conditions at the end of the reporting period continued until the end of the performance period. See Note 7 for further information regarding earnings per share computations. Restricted Stock Units The restricted stock units awarded to eligible members of the Board of Directors are fully vested and will be paid in shares of Company common stock on the earlier of the date after the Director ceases to serve as a member of the Board or upon a change in control of the Company. The grant date fair value of the 2017 restricted stock units was based on the closing market price of the stock on the date of grant. Deferred Compensation - Equity Certain employees are eligible to participate in the Company’s Non-qualified Deferred Compensation Plan (the “Deferred Compensation Plan”). Participants may elect to defer all or part of their restricted and performance shares. Participants have elected to defer 308,304 shares of Company common stock vested as of June 30, 2017, and 294,574 shares vested as of December 31, 2016. Company stock held for future issuance of vested awards is classified as deferred compensation equity in the Condensed Consolidated Balance Sheets and is recorded at grant date fair value.

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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 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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