STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION - Narrative (Details)					1 Months Ended		3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares	Dec. 13, 2021 shares	Apr. 21, 2021 USD ($)	Feb. 17, 2021 USD ($) numberOfAnnualIncrement	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) numberOfAnnualIncrement $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) numberOfAnnualIncrement $ / shares shares	Mar. 31, 2020 USD ($) numberOfAnnualIncrement	Dec. 20, 2022 USD ($)	Sep. 30, 2022 shares	Jun. 30, 2022 shares	Jul. 16, 2020 USD ($)
Share-based compensation
Common stock, shares authorized (in shares) | shares	200,000,000				200,000,000		200,000,000	200,000,000	200,000,000
Common stock, par or stated value (in dollars per share) | $ / shares	$ 0.10				$ 0.10		$ 0.10	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares) | shares	1,000,000				1,000,000		1,000,000	1,000,000	1,000,000
Preferred stock, par or stated value (in dollars per shares) | $ / shares	$ 1.00				$ 1.00		$ 1.00	$ 1.00	$ 1.00
Acquisition of treasury stock								$ 149,997,000	$ 58,621,000	$ 42,312,000
Treasury stock, at cost (in shares) | shares	87,400,000				87,400,000		87,400,000	87,400,000	81,200,000
Treasury stock, at cost	$ 2,252,034,000				$ 2,252,034,000		$ 2,252,034,000	$ 2,252,034,000	$ 2,099,765,000
Dividends, common stock								$ 0
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares) | shares													42,400,000	37,900,000
Number of available shares (in shares) | shares								4,500,000
Exercised (in dollars per share) | $ / shares								$ 11.06
Exercised								$ 3,681,000
Award vesting rights percentage								50.00%
Award vesting percentage after one year								50.00%
Future expense for performance stock option units	128,059,000				128,059,000		128,059,000	$ 128,059,000
Accumulated other comprehensive income (loss), foreign currency translation adjustment	4,504,000				4,504,000		4,504,000	4,504,000	$ 5,730,000
Common Stock Repurchase Program
Share-based compensation
Stock repurchase program, authorized amount	$ 1,100,000,000				$ 1,100,000,000		$ 1,100,000,000	$ 1,100,000,000				$ 100,000,000
Acquisition of treasury stock (in shares) | shares								6,100,000	1,300,000	1,300,000
Acquisition of treasury stock								$ 150,000,000	$ 58,600,000	$ 42,300,000
Treasury stock, at cost (in shares) | shares	35,600,000				35,600,000		35,600,000	35,600,000
Treasury stock, at cost	$ 882,200,000				$ 882,200,000		$ 882,200,000	$ 882,200,000
Stock repurchase program, remaining amount	217,800,000				217,800,000		217,800,000	$ 217,800,000
Performance Based Stock Units
Share-based compensation
Granted (in shares) | shares								406,501
Aggregate fair value of restricted stock units granted								$ 10,000,000
Performance stock
Share-based compensation
Granted (in shares) | shares										246,524
Diablo.AI, Inc.
Share-based compensation
Vesting period			3 years
Holdback consideration transferred			$ 1,200,000
Acuity Data
Share-based compensation
Business combination, contingent consideration arrangements, range of outcomes, value, high						$ 5,100,000				$ 5,100,000					$ 5,100,000
Non-cash stock-based compensation expense								4,900,000
Business combination, contingent consideration, liability, expected costs	1,700,000				1,700,000		1,700,000	1,700,000
Acuity Data | Accrued Liabilities
Share-based compensation
Business combination, contingent consideration, liability	$ 1,500,000				$ 1,500,000		$ 1,500,000	1,500,000
DataFleets, Ltd
Share-based compensation
Total fair value of the replacement stock options issued				$ 2,900,000					2,900,000
Holdback consideration transferred										$ 18,100,000
Holdback expenses								12,400,000
Holdback expenses, expected costs								2,600,000
DataFleets, Ltd | Consideration Holdback
Share-based compensation
Business combination, contingent consideration arrangements, range of outcomes, value, high				$ 18,100,000
Business combination, contingent consideration arrangements, number of annual increments | numberOfAnnualIncrement				3		3				3
DataFleets, Ltd | Accrued Liabilities
Share-based compensation
Holdback expenses								300,000
Data Plus Math Corporation
Share-based compensation
Holdback consideration transferred											$ 24,400,000
Data Plus Math Corporation | Consideration Holdback
Share-based compensation
Business combination, contingent consideration arrangements, number of annual increments | numberOfAnnualIncrement											3
Stock options
Share-based compensation
Share-based compensation expense								968,000	1,935,000	$ 2,308,000
Exercised								3,700,000	$ 4,300,000	23,200,000
Stock options | DataFleets, Ltd
Share-based compensation
Shares issued in period (in shares) | shares									42,154
Exercised (in dollars per share) | $ / shares									$ 0.70
Restricted Stock | Diablo.AI, Inc.
Share-based compensation
Conversion of convertible securities (in shares) | shares									40,600
Conversion of convertible securities									$ 1,900,000
Vested in period, fair value								$ 600,000	$ 800,000
Outstanding at the end of the period (in shares) | shares	0				0		0	0	24,766
Restricted stock units
Share-based compensation
Share-based compensation expense								$ 111,943,000	$ 56,008,000	$ 78,164,000
Restricted stock units | Rakam Technology Asset Acquisition
Share-based compensation
Granted (in shares) | shares		2,600,000
Vesting period		4 years
Restricted stock units | Vesting in Four Years
Share-based compensation
Granted (in shares) | shares								4,352,078
Aggregate fair value of restricted stock units granted								$ 107,200,000
Vesting period								3 years	4 years	4 years
Restricted stock units | Time Based Vesting
Share-based compensation
Forfeited in period (in shares) | shares								1,395,937
Vested in period, fair value								$ 71,500,000	$ 30,300,000	$ 126,900,000
Granted (in shares) | shares								4,352,078	3,037,440	2,228,445
Aggregate fair value of restricted stock units granted									$ 143,400,000	$ 99,800,000
Outstanding at the end of the period (in shares) | shares	4,009,759				4,009,759		4,009,759	4,009,759	4,176,682
Restricted stock units | Time Based Vesting | Rakam Technology Asset Acquisition
Share-based compensation
Granted (in shares) | shares									55,927
Aggregate fair value of restricted stock units granted									$ 2,600,000
Restricted stock units | Performance Based Stock Units
Share-based compensation
Granted (in shares) | shares								121,951
Aggregate fair value of restricted stock units granted								$ 3,700,000
Restricted stock units | ATS Performance Plan Vesting Total Shareholder Return
Share-based compensation
Granted (in shares) | shares									36,425
Aggregate fair value of restricted stock units granted									$ 1,700,000
Restricted stock units | ATS Performance Plan Vesting Total Shareholder Return | Minimum
Share-based compensation
Award vesting rights percentage									0.00%
Restricted stock units | ATS Performance Plan Vesting Total Shareholder Return | Maximum
Share-based compensation
Award vesting rights percentage									100.00%
Restricted stock units | Performance Shares Vesting Total Shareholder Return
Share-based compensation
Granted (in shares) | shares									63,815	73,950
Aggregate fair value of restricted stock units granted									$ 3,800,000	$ 4,200,000
Restricted stock units | Performance Shares Vesting Total Shareholder Return | Minimum
Share-based compensation
Award vesting rights percentage									0.00%	0.00%
Restricted stock units | Performance Shares Vesting Total Shareholder Return | Maximum
Share-based compensation
Award vesting rights percentage									200.00%	200.00%
Restricted stock units | Performance stock
Share-based compensation
Forfeited in period (in shares) | shares								146,709
Granted (in shares) | shares								406,501	249,152	59,634
Aggregate fair value of restricted stock units granted									$ 12,600,000	$ 10,700,000
Outstanding at the end of the period (in shares) | shares	709,589				709,589		709,589	709,589	584,468
The total fair value of performance-based restricted stock units								$ 3,000,000	$ 6,700,000	$ 8,400,000
Restricted stock units | Performance Based Stock Units Under Operating Metrics
Share-based compensation
Granted (in shares) | shares								284,550
Aggregate fair value of restricted stock units granted								$ 6,300,000
Restricted stock units | Performance Based Stock Units Under Operating Metrics | Minimum
Share-based compensation
Award vesting rights percentage								0.00%
Restricted stock units | Performance Based Stock Units Under Operating Metrics | Maximum
Share-based compensation
Award vesting rights percentage								200.00%
Restricted stock units | 2021 Performance Shares That Will Vest Immediately
Share-based compensation
Forfeited in period (in shares) | shares	22,948							71,666
Hurdle achievement, percentage	63.00%							50.00%
Outstanding at the end of the period (in shares) | shares	13,477				13,477		13,477	13,477
Restricted stock units | 2021 Performance Shares That Will Vest In One Year
Share-based compensation
Vesting period								1 year
Award vesting rights percentage								0.00%
Outstanding at the end of the period (in shares) | shares	69,588				69,588		69,588	69,588
Restricted stock units | Share-based Payment Arrangement, Tranche Three
Share-based compensation
Forfeited in period (in shares) | shares					1,500,000	700,000
Compensation costs					$ 22,600,000	$ 21,400,000
Incremental compensation cost					400,000	8,400,000
Accelerated original grant date fair value compensation cost					$ 22,100,000	$ 13,000,000
Restricted stock units | Performance Shares Vesting Under The Second Plan
Share-based compensation
Granted (in shares) | shares										172,574
Aggregate fair value of restricted stock units granted										$ 6,500,000
Restricted stock units | Performance Shares Vesting Under The Second Plan | Minimum
Share-based compensation
Award vesting rights percentage										0.00%
Restricted stock units | Performance Shares Vesting Under The Second Plan | Maximum
Share-based compensation
Award vesting rights percentage										200.00%
Restricted stock units | Diablo.AI, Inc.
Share-based compensation
Share-based compensation expense								$ 1,126,000	$ 794,000	$ 0
Restricted stock units | Data Plus Math Corporation | Time Based Vesting
Share-based compensation
Granted (in shares) | shares									98,442	193,595
Aggregate fair value of restricted stock units granted									$ 4,700,000	$ 13,500,000
Employee stock purchase plan
Share-based compensation
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares) | shares													1,400,000	400,000
Number of shares per employee (in shares) | shares								1,100,000
Number of available shares (in shares) | shares								1,000,000
Share-based compensation expense								$ 2,051,000	$ 1,803,000	$ 704,000
Stock purchase offering period								6 months
Purchase of common stock percentage								85.00%
Stock issued during period, ESPP (in shares) | shares								197,255	103,447	44,980
Shares issued, price per share (in dollars per share) | $ / shares	$ 20.38				$ 20.38	$ 41.53	$ 20.38	$ 20.38	$ 41.44	$ 41.53
Stock issued during period, ESPP, value								$ 4,000,000	$ 4,300,000	$ 1,900,000
Future expense for performance stock option units	$ 400,000				$ 400,000		$ 400,000	$ 400,000
Stock Option and Equity Compensation Plans
Share-based compensation
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares) | shares	45,000,000				45,000,000		45,000,000	45,000,000					45,000,000	39,500,000
Stock Option and Equity Compensation Plans | Employee stock purchase plan
Share-based compensation
Shares which remained available for future grants (in shares) | shares	5,400,000				5,400,000		5,400,000	5,400,000
2005 Plan
Share-based compensation
Duration of stock options granted							5 years
Share-based compensation expense							$ 5,400,000
Operating Metrics Performance Plan | Restricted stock units
Share-based compensation
Forfeited in period (in shares) | shares									58,312
Award vesting rights percentage									50.00%
Outstanding at the end of the period (in shares) | shares	174,930				174,930		174,930	174,930
Operating Metrics Performance Plan | Restricted stock units | Performance stock
Share-based compensation
Granted (in shares) | shares									148,912
Aggregate fair value of restricted stock units granted									$ 7,100,000
Operating Metrics Performance Plan | Restricted stock units | Performance stock | Minimum
Share-based compensation
Award vesting rights percentage									0.00%
Operating Metrics Performance Plan | Restricted stock units | Performance stock | Maximum
Share-based compensation
Award vesting rights percentage									200.00%
Operating Metrics Performance Plan | Restricted stock units | 2023 Performance-Based Stock Units That Will Vest On The One Year Anniversary Of Attainment
Share-based compensation
Vesting period								1 year
Operating Metrics Performance Plan | Restricted stock units | 2022 Performance Shares That Will Vest Immediately
Share-based compensation
Award vesting percentage after one year									50.00%
Operating Metrics Performance Plan | Restricted stock units | 2022 Performance-Based Stock Units That Will Vest On The One Year Anniversary Of Attainment
Share-based compensation
Vesting period									1 year
Award vesting percentage after one year									50.00%
2021 Performance Shares That Will Vest Immediately | Restricted stock units
Share-based compensation
Award vesting rights percentage								50.00%
2021 Performance Shares That Will Vest In One Year | Restricted stock units
Share-based compensation
Award vesting rights percentage								50.00%
Qualified Employee Stock Purchase Plan | Employee stock purchase plan
Share-based compensation
Share-based compensation expense								$ 2,100,000	$ 1,800,000	$ 1,000,000