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Stock Incentive Plans and Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity: 

 

 

 

Stock Options

 

 

 

 

 

 

 

Weighted-

 

 

 

 

 

 

 

Average

 

 

 

Shares

 

 

Exercise Price

 

Outstanding at January 1, 2018

 

 

4,375,929

 

 

$

10.73

 

Granted

 

 

—

 

 

 

 

 

Exercised

 

 

(42,429

)

 

$

5.04

 

Cancelled

 

 

(173,409

)

 

$

10.33

 

Outstanding at June 30, 2018

 

 

4,160,091

 

 

$

10.80

 

Vested at June 30, 2018

 

 

2,456,208

 

 

$

9.49

 

Exercisable at June 30, 2018

 

 

305,004

 

 

$

4.14

 

 
Summary of RSU and PSU Activity

The following table summarizes the Company’s RSU and PSU activity:

 

 

 

RSUs

 

 

PSUs

 

 

 

 

 

 

 

Weighted-

 

 

 

 

 

 

Weighted-

 

 

 

 

 

 

 

Average Grant

 

 

 

 

 

 

Average Grant

 

 

 

Shares

 

 

Date Fair Value

 

 

Shares(1)

 

 

Date Fair Value

 

Outstanding at January 1, 2018

 

 

—

 

 

 

 

 

 

 

62,791

 

 

$

27.87

 

Granted

 

 

241,542

 

 

$

29.09

 

 

 

108,957

 

 

$

28.72

 

Vested

 

 

—

 

 

 

 

 

 

 

—

 

 

 

 

 

Cancelled

 

 

(5,386

)

 

$

28.72

 

 

 

—

 

 

 

 

 

Outstanding at June 30, 2018

 

 

236,156

 

 

$

29.10

 

 

 

171,748

 

 

$

28.41

 

__________________

 

(1)

The number of Shares listed for PSUs represents the “target” number of PSUs granted to each recipient eligible to vest if the Company meets its “target” performance goals for the applicable period. The actual number of PSUs eligible to vest will vary depending on whether or not the Company meets or exceeds the applicable threshold, target or maximum performance goals for the PSUs. With respect to 108,957 of the listed “target” number of PSUs, 200% of the “target” number of PSUs will be eligible to vest at “maximum” performance levels.