Income Taxes (Tables)

6 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Differences Between Statutory Income Tax Rate and Effective Income Tax Rate

The significant differences between the statutory income tax rate and effective income tax rate for the three and six months ended September 30, 2018 and 2017 consist of the following items:

	For the Three Months Ended September 30,							For the Six Months Ended September 30,
		2018			2017				2018			2017
Statutory income tax rate		21.0		%	35.0		%		21.0		%	35.0		%
Increase resulting from:
Excess tax benefits from stock-based awards		(24.9	)		(13.7	)			(66.6	)		(32.1	)
Credits		(1.8	)		(1.2	)			(1.8	)		(1.2	)
State taxes, net		4.3			3.5				4.3			3.5
Permanent differences		1.8			1.8				1.8			1.8
Other		2.9			(0.8	)			1.6			(0.4	)
Effective tax rate		3.3		%	24.6		%		(39.7	)	%	6.6		%