Share-Based Compensation (Tables)

9 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

A summary of the Company's RSUs granted under the Plan is presented below:



RSUs	Shares (in thousands)		Weighted- Average Grant-Date Fair Value
Nine Months Ended December 31, 2016
Vested and nonvested at March 31, 2016	467.8		$	35.22
Granted	68.4		55.44
Vested and issued	(94.7	)	28.51
Forfeited	(91.4	)	41.71
Vested and nonvested at December 31, 2016	350.1		39.29
Vested at December 31, 2016	63.4		20.12

Nine Months Ended December 31, 2017
Vested and nonvested at March 31, 2017	350.1		$	39.29
Granted	105.8		55.61
Vested and issued	(53.3	)	34.30
Forfeited	(8.8	)	48.49
Vested and nonvested at December 31, 2017	393.8		44.14
Vested at December 31, 2017	90.5		29.88

Fair Value of Options Granted

The weighted-average grant-date fair values of the options granted during the nine months ended December 31, 2017 and 2016 were $21.20 and $21.75, respectively.



	Nine Months Ended December 31,
	2017			2016
Expected volatility	35.2		%	37.8		%
Expected dividends	$	—		$	—
Expected term in years	6.0			6.0
Risk-free rate	2.2		%	1.7		%

Stock Option Activity

A summary of option activity under the Plan is as follows:



Options	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Nine Months Ended December 31, 2016
Outstanding at March 31, 2016	727.7		$	30.70
Granted	264.3		55.86
Exercised	(107.9	)	31.91
Forfeited or expired	(92.2	)	42.62
Outstanding at December 31, 2016	791.9		37.54		7.4	$	12,543
Exercisable at December 31, 2016	387.0		25.70		6.3	$	10,217

Nine Months Ended December 31, 2017
Outstanding at March 31, 2017	772.3		$	37.70
Granted	182.8		56.11
Exercised	(51.0	)	28.76
Forfeited or expired	(22.1	)	48.15
Outstanding at December 31, 2017	882.0		41.77		7.2	$	7,019
Exercisable at December 31, 2017	502.9		32.50		6.1	$	6,884