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Share and Incentive-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Unvested Restricted Stock Awards The following table presents a summary of the Company’s unvested restricted stock awards:
 
Number of
Shares
 
Weighted Average Grant Date Fair Value
 
(In thousands)
 
 
Unvested restricted shares outstanding at December 31, 2017
1,105

 
$
22.62

Granted
3

 
$
15.45

Vested
(228
)
 
$
22.96

Forfeited / Canceled
(17
)
 
$
21.39

Unvested restricted shares outstanding at March 31, 2018
863

 
$
22.53
Schedule of Nonvested Performance-based Units Activity The following table presents a summary of the Company’s performance share units:
 
Number of
Units
 
Fair Value per Unit at March 31, 2018
 
(In thousands)
 
 
 
 
Unvested performance share units outstanding at December 31, 2017
183

 
 
 
 
Granted
—

 
 
 
 
Vested
(36
)
 
 
 
 
Forfeited / Canceled
(3
)
 
 
 
 
Unvested performance share units outstanding at March 31, 2018
144

 
$
19.94

-
$
20.00
Schedule of Nonvested Incentive Performance Unit Activity The following table presents a summary of the Company’s performance units:
 
Number of
Units
 
Fair Value per Unit at March 31, 2018
 
(In thousands)
 
 
Unvested performance units outstanding at December 31, 2017
49

 
 
Granted
—

 
 
Vested
(10
)
 
 
Forfeited / Canceled
(1
)
 
 
Unvested performance units outstanding at March 31, 2018
38

 
$
100.00