Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of Reconciliation of the U.S. Federal Statutory Rate to Effective Tax Rate

A reconciliation of the U.S. federal statutory income tax rate to our effective income tax rate is as follows:

	For the Three Months Ended   June 30,				For the Six Months Ended   June 30,
	2018		2017		2018		2017
U.S. federal statutory income tax rate	21.0	%	35.0	%	21.0	%	35.0	%
State income taxes	2.5	%	1.8	%	2.5	%	1.8	%
Excess tax benefits from stock-based compensation plans	—	%	—	%	-0.1	%	-0.8	%
Other	0.2	%	0.1	%	0.4	%	0.1	%
Effective income tax rate	23.7	%	36.9	%	23.8	%	36.1	%