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Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2016
Share-based Compensation [Abstract]  
Summary of company stock award
A summary of the status of the Company’s nonvested restricted stock awards as of June 30, 2016, and changes during the six months ended June 30, 2016, is presented below: 
 
Shares
 
Weighted Average
Grant-Date
Fair Value
Nonvested at January 1, 2016
533,404

 
$
19.19

Granted
319,660

 
$
10.02

Vested
(200,889
)
 
$
16.46

Forfeited
(9,560
)
 
$
17.04

Nonvested at June 30, 2016
642,615

 
$
15.52