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Share-based Compensation
 3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-based Compensation
Share-based Compensation

Share-based compensation expense was as follows:
For the three months ended March 31,
2018
 
2017
Stock options, net of estimated forfeitures
$
(7,166
)
 
$
19,281

Restricted stock awards
3,410

 
3,107

Total
$
(3,756
)
 
$
22,388



The negative stock options expense for the three months ended March 31, 2018 relates to the correction of an immaterial error recorded in the prior year.