STOCK-BASED COMPENSATION: (Tables)

6 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of stock-based compensation activity, by award type

The Company's stock-based compensation activity for the six months ended September 30, 2019, by award type, was (dollars in millions):

	For the six months ended
	September 30,
	2019		2018
Stock options	$	1.8	$	1.7
Restricted stock units	25.4		17.5
Arbor acquisition consideration holdback	2.6		7.7
DPM acquisition consideration holdback	2.1		—
PDP assumed performance plan	9.5		7.9
Other non-employee stock-based compensation	0.6		0.7
Total non-cash stock-based compensation included in the condensed consolidated statements of operations	42.0		35.5
Less expense related to liability-based equity awards	(10.7)		(7.1)
Stock-based compensation of discontinued operations	—		5.7
Total non-cash stock-based compensation included in the condensed consolidated statements of equity	$	31.3	$	34.1

Schedule of effect of stock-based compensation expense on income, by financial statement line item

The effect of stock-based compensation expense on income, by financial statement line item, was (dollars in millions):

	For the six months ended
	September 30,
	2019		2018
Cost of revenue	$	1.8	$	1.5
Research and development	10.0		7.9
Sales and marketing	18.7		19.8
General and administrative	11.5		6.3
Total non-cash stock-based compensation included in the condensed consolidated statements of operations	$	42.0	$	35.5

Schedule of share based compensation arrangement by share based payment award, future expense

The following table provides the expected future expense for all of the Company's outstanding equity awards at September 30, 2019, by award type. The amount for 2020 represents the remaining six months ending March 31, 2020. All other periods represent fiscal years ending March 31 (dollars in millions).

	During the year ended:
	2020		2021		2022		2023		2024		Total
Stock options	$	1.9	$	2.4	$	1.2	$	0.3	$	—	$	5.8
Restricted stock units	28.4		47.2		36.5		22.2		3.0		137.3
DPM acquisition consideration holdback	4.1		8.3		8.2		2.1		—		22.7
PDP assumed performance plan	7.6		15.1		15.1		—		—		37.8
	$	42.0	$	73.0	$	61.0	$	24.6	$	3.0	$	203.6

Schedule of option activity

Stock option activity for the six months ended September 30, 2019 was: 

				Weighted-average
		Weighted-average		remaining	Aggregate
	Number of	exercise price		contractual term	Intrinsic value
	shares	per share		(in years)	(in thousands)
Outstanding at March 31, 2019	1,374,430	$	14.81
DPM replacement stock options issued	162,481	$	1.64
Exercised	(77,209)	$	3.55		$	3,343
Forfeited or canceled	(4,354)	$	5.39
Outstanding at September 30, 2019	1,455,348	$	13.97	4.3	$	42,197
Exercisable at September 30, 2019	1,301,861	$	15.41	3.9	$	35,877

Summary of stock options outstanding and exercisable

A summary of stock options outstanding and exercisable as of September 30, 2019 was:

					Options outstanding				Options exercisable
Range of						Weighted-average	Weighted-average			Weighted-average
exercise price					Options	remaining	exercise price		Options	exercise price
per share					outstanding	contractual life	per share		exercisable	per share
$	0.61	—	$	9.99	304,410	6.2 years	$	1.61	150,923	$	1.51
$	10.00	—	$	19.99	709,672	3.1 years	$	14.69	709,672	$	14.69
$	20.00	—	$	24.99	441,266	4.9 years	$	21.32	441,266	$	21.32
					1,455,348	4.3 years	$	13.97	1,301,861	$	15.41

Schedule of performance stock option unit activity

Performance stock option unit activity for the six months ended September 30, 2019 was:

				Weighted-average
		Weighted-average		remaining	Aggregate
	Number	exercise price		contractual term	intrinsic value
	of shares	per share		(in years)	(in thousands)
Outstanding at March 31, 2019	130,154	$	21.44
Forfeited or canceled	(130,154)	$	21.44
Outstanding at September 30, 2019	—	$	—		$	—
Exercisable at September 30, 2019	—	$	—	—	$	—

Schedule of time-vesting restricted stock unit activity

Time-vesting restricted stock unit activity for the six months ended September 30, 2019 was:

		Weighted-average
		fair value per		Weighted-average
	Number	share at grant		remaining contractual
	of shares	date		term (in years)
Outstanding at March 31, 2019	3,054,750	$	30.91	2.47
Granted	1,273,119	$	53.06
Vested	(237,220)	$	24.61
Forfeited or canceled	(220,733)	$	36.19
Outstanding at September 30, 2019	3,869,916	$	38.28	2.55

Schedule of non-vested performance-based restricted stock units activity

Non-vested performance-based restricted stock unit activity for the six months ended September 30, 2019 was:

		Weighted-average
		fair value per		Weighted-average
	Number	share at grant		remaining contractual
	of shares	date		term (in years)
Outstanding at March 31, 2019	394,188	$	43.88	3.23
Granted	202,818	$	60.65
Forfeited or canceled	(46,236)	$	34.61
Outstanding at September 30, 2019	550,770	$	50.83	2.73