Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

Share-based Compensation [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Total stock compensation expense and the total related tax benefit recognized are as follows:

	Three months ended
	March 31,
	2018		2017
Stock compensation expense	$	11,267	$	10,623
Recognized tax benefit	$	1,517	$	2,213