Income Taxes (Tables)

9 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Differences Between Statutory and Effective Income Tax Rate

The significant differences between the statutory and effective income tax rate for the three and nine months ended December 31, 2018 and 2017 consist of the following items:

	For the Three Months Ended December 31,							For the Nine Months Ended December 31,
		2018			2017				2018			2017
Statutory income tax rate		21.0		%	31.5		%		21.0		%	31.5		%
Increase resulting from:
Excess tax benefits from stock-based awards		(2.6	)		(7.0	)			(41.5	)		(21.9	)
Credits		(1.7	)		(2.1	)			(1.7	)		(2.1	)
State taxes, net		4.3			3.7				4.3			3.7
Permanent differences		1.8			1.7				1.8			1.7
Effect of the Tax Reform Act on net deferred tax assets		—			42.1				—			19.6
Excess foreign tax credits		7.9			—				3.7			—
Other		(0.2	)		0.7				0.1			0.2
Effective tax rate		30.5		%	70.6		%		(12.3	)	%	32.7		%