Summary of stock option activity under the 2000 Plan, the 2007 Plan and the 2015 Plan

The following tables summarize stock option and restricted stock activity under the 2000 Plan, the 2007 Plan and the 2015 Plan, as the case may be, for the fiscal years ended March 31, 2020, 2019 and 2018:


	Stock Option Activity
	Number of			Weighted
	Options	Weighted		Average
	to Purchase	Average		Remaining	Aggregate
	Common	Exercise		Life	Intrinsic
	Shares	Price		(in years)	Value
Outstanding at March 31, 2017	569,661	$	13.31
Granted	—		—
Exercised	(322,317)		12.60
Forfeited or cancelled	—		—
Outstanding at March 31, 2018	247,344		14.24
Granted	—		—
Exercised	(101,618)		10.02
Forfeited or cancelled	—		—
Outstanding at March 31, 2019	145,726		17.18
Granted	—		—
Exercised	(31,830)		14.69
Forfeited or cancelled	—		—
Outstanding at March 31, 2020	113,896	$	17.87	2.01	$	1,261
Exercisable at March 31, 2020	113,896	$	17.87	2.01	$	1,261

Stock Options, Restricted Stock Awards and Stock Appreciation Rights

Summary of restricted stock activity under the 2000 Plan, the 2007 Plan and the 2015 Plan


	Restricted Stock Unit Activity
	Number of
	Restricted	Weighted Average
	Stock Units	Grant Date Fair Value
Unvested at March 31, 2017	1,979,616	$	27.29
Awarded	731,363		35.99
Vested	(436,225)		39.14
Forfeited	(752,765)		25.06
Unvested at March 31, 2018	1,521,989		29.18
Awarded	775,532		46.27
Vested	(612,854)		30.11
Forfeited	(291,547)		31.66
Unvested at March 31, 2019	1,393,120		37.76
Awarded	761,467		41.38
Vested	(704,207)		37.87
Forfeited	(100,216)		43.82
Unvested at March 31, 2020	1,350,164	$	39.30