Quarterly report pursuant to Section 13 or 15(d)

Stock-based Expense (Tables)

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Stock-based Expense (Tables)
9 Months Ended
Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Restricted Stock Activity
During the three and nine months ended September 30, 2018, we made the following grants of time-based restricted stock:
Three Months Ended September 30, 2018
 
Nine Months Ended September 30, 2018
 
Vesting
62,196

 
1,040,640

 
Shares vest ratably over a period of twelve quarters beginning on the first day of the second calendar quarter immediately following the grant date.

 
3,600

 
Shares fully vested on the first day of the calendar quarter immediately following the grant date.
1,500

 
35,346

 
Shares vest ratably over a period of four quarters beginning on the first day of the calendar quarter immediately following the grant date.
During the nine months ended September 30, 2018, we granted 517,364 shares of restricted stock that become eligible to vest based on the achievement of certain market-based conditions, as described below:
Three Months Ended September 30, 2018
 
Nine Months Ended September 30, 2018
 
Condition to Become Eligible to Vest

 
129,341

 
After the grant date and prior to July 1, 2021, the average closing price per share of our common stock equals or exceeds $60.89 for twenty consecutive trading days.

 
129,341

 
After the grant date and prior to July 1, 2021, the average closing price per share of our common stock equals or exceeds $66.98 for twenty consecutive trading days.

 
129,341

 
After the grant date and prior to July 1, 2021, the average closing price per share of our common stock equals or exceeds $73.07 for twenty consecutive trading days.

 
129,341

 
After the grant date and prior to July 1, 2021, the average closing price per share of our common stock equals or exceeds $85.24 for twenty consecutive trading days.