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Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Compensation Expense and Related Tax Benefits
The following table presents compensation (benefit) expense and the related tax benefits for equity awards recognized in the consolidated statements of income:
 
Three months ended March 31
 
2017
 
2016
 
(in thousands)
Stock-based compensation expense
$
734

 
$
1,436

Tax benefit
(744
)
 
(433
)
Stock-based compensation expense, net of tax benefit
$
(10
)
 
$
1,003