Share-Based Compensation (Tables)

3 Months Ended

Jun. 30, 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
Three months ended June 30, 2016
Vested and nonvested at March 31, 2016	467.8		$	35.22
Granted	49.4		57.16
Vested and issued	(75.6	)	31.36
Forfeited	(76.2	)	39.93
Vested and nonvested at June 30, 2016	365.4		38.00
Vested at June 30, 2016	70.2		14.89

Three months ended June 30, 2017
Vested and nonvested at March 31, 2017	350.1		$	39.29
Granted	90.4		56.11
Vested and issued	(50.8	)	34.28
Forfeited	(2.3	)	50.06
Vested and nonvested at June 30, 2017	387.4		43.81
Vested at June 30, 2017	63.7		20.31

Fair Value of Options Granted

The weighted-average grant-date fair values of the options granted during the three months ended June 30, 2017 and 2016 were $21.20 and $22.26, respectively.



	Three months ended June 30,
	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)
Three months ended June 30, 2016
Outstanding at March 31, 2016	727.7		$	30.70
Granted	224.8		57.18
Exercised	(105.7	)	32.20
Forfeited or expired	(45.5	)	37.34
Outstanding at June 30, 2016	801.3		37.55		8.0	$	14,700
Exercisable at June 30, 2016	386.4		25.20		6.7	$	11,669

Three months ended June 30, 2017
Outstanding at March 31, 2017	772.3		$	37.70
Granted	182.8		56.11
Exercised	(13.8	)	31.35
Forfeited or expired	(5.8	)	32.64
Outstanding at June 30, 2017	935.5		41.42		7.7	$	12,123
Exercisable at June 30, 2017	527.3		31.95		6.5	$	11,305