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Equity Awards | 6 Months Ended
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Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Equity Awards | Equity Awards Stock Options The Company did not grant any stock option awards during the six months ended June 30, 2018. Information related to stock options at June 30, 2018 is as follows:
|  | Number of Stock Options |  | Weighted Average Option Price |  | Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value
Outstanding at January 1, 2018 |  | 206,854 |  |  | $ | 13.19 |  |  |  |  |
Granted |  | — |  |  | — |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |
Cancelled |  | — |  |  | — |  |  |  |  |
Expired |  | — |  |  | — |  |  |  |  |
Outstanding at June 30, 2018 |  | 206,854 |  |  | $ | 13.19 |  |  | 6.1 |  | $ | 3,352,113 |
As of June 30, 2018, 106,854 stock options outstanding were exercisable under the Plans. As of June 30, 2018, there was approximately $0.2 million of unrecognized compensation cost related to stock options that is expected to be recorded over a weighted average period of 1.1 years. The Company recognized approximately $0.1 million and $0.2 million of stock-based compensation expense related to stock options during the three months ended June 30, 2018 and 2017, respectively, and approximately $0.2 million and $0.3 million of stock-based compensation expense during the six months ended June 30, 2018 and 2017, respectively. The stock-based compensation expense is included in selling, general and administrative expenses in the accompanying consolidated statement of income. Restricted Stock Units The Company awarded the following restricted stock units ("RSUs") during the six months ended June 30, 2018:
• | granted 140,183 RSUs to certain employees, which are subject only to a service condition and vest ratably over three years so long as the employee remains with the Company; and
• | granted 25,830 RSUs to its non-employee independent directors, which vest one year from date of grant so long as the director and/or Company does not terminate the director's service prior to the vesting date.
In addition, the Company issued 4,509 RSUs related to director fee deferrals for the six months ended June 30, 2018. The Company allows for its non-employee independent directors to make an annual election to defer all or a portion of their directors fees and to receive the deferred amount in cash or equity. Certain of the Company's directors have elected to defer all or a portion of their directors fees and to receive the amount in Company common stock at a future date. During 2018, the Company awarded 104,532 performance-based RSUs to certain Company key employees which vest three years from the grant date as long as the employee remains with the Company. These awards are earned 50% based upon the Company's achievement of earnings per share compound annual growth rate ("EPS CAGR") metrics over a period beginning January 1, 2018 and ending December 31, 2020. The remaining 50% of the grants are earned based on the Company's total shareholder return ("TSR") relative to the TSR of the common stock of a pre-defined industry peer-group and measured over the performance period. TSR is calculated as the Company's average closing stock price for the 20-trading days at the end of the performance period plus Company dividends, divided by the Company's average closing stock price for the 20-trading days prior to the start of the performance period. The Company estimated the grant-date fair value and term of the awards subject to a market condition using a Monte Carlo simulation model, using the following weighted average assumptions: risk-free rate of 2.67% and annualized volatility of 30.2%. Depending on the performance achieved for these two metrics, the amount of shares earned, if any, can vary from 40% of the target award to a maximum of 200% of the target award for the EPS CAGR metric and 0% of the target award to a maximum of 200% of the target award for the TSR metric. During 2015, the Company awarded performance-based RSUs to certain Company key employees which were earned based upon the Company's TSR relative to the TSR of the common stock of a pre-defined industry peer-group and measured over a period beginning September 10, 2015 and ending on December 31, 2017. Depending on the performance achieved, the amount of shares earned could vary from 0% of the target award to a maximum of 200% of the target award. The Company attained 126.9% of the target on a weighted average basis, resulting in an increase of 31,021 shares during the six months ended June 30, 2018. Information related to RSUs at June 30, 2018 is as follows:
|  | Number of Unvested RSUs |  | Weighted Average Grant Date Fair Value |  | Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value
Outstanding at January 1, 2018 |  | 726,936 |  |  | $ | 22.60 |  |  |  |  |
Granted |  | 306,075 |  |  | 30.29 |  |  |  |  |
Vested |  | (338,141 | ) |  | 21.61 |  |  |  |  |
Cancelled |  | (26,710 | ) |  | 22.23 |  |  |  |  |
Outstanding at June 30, 2018 |  | 668,160 |  |  | $ | 26.64 |  |  | 1.4 |  | $ | 19,643,904 |
As of June 30, 2018, there was approximately $10.6 million of unrecognized compensation cost related to unvested RSUs that is expected to be recorded over a weighted average period of 2.4 years. The Company recognized stock-based compensation expense related to RSUs of approximately $1.3 million and $1.7 million during the three months ended June 30, 2018 and 2017, respectively, and approximately $2.5 million and $3.0 million during the six months ended June 30, 2018 and 2017, respectively. The stock-based compensation expense is included in selling, general and administrative expenses in the accompanying consolidated statement of income.

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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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