STOCK-BASED COMPENSATION- Narrative (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($) plan $ / shares shares	Jun. 30, 2023 shares	Dec. 31, 2023 USD ($) plan $ / shares shares	Dec. 31, 2022 USD ($)	Mar. 31, 2023 shares	Mar. 31, 2022 shares	Sep. 30, 2023 shares
Share-based compensation
Total shares reserved for issuance since inception of the stock option and equity compensation plans (in shares)					42,400,000		46,400,000
Number of available shares (in shares)		4,000,000
Number of performance plans | plan	2		2
Future expense for performance stock option units | $	$ 136,351		$ 136,351
Acuity Data
Share-based compensation
Non-cash stock-based compensation expense | $			5,100
Business combination, contingent consideration, liability, expected costs | $	1,700		1,700
DataFleets, Ltd
Share-based compensation
Holdback expenses | $			$ 14,700
Holdback expenses, expected costs | $	$ 2,600
Employee stock purchase plan
Share-based compensation
Stock issued during period, ESPP (in shares)			216,699
Shares issued, price per share (in dollars per share) | $ / shares	$ 19.76		$ 19.76
Stock issued during period, ESPP, value | $			$ 4,300
Share-based compensation expense | $			1,167	$ 1,527
Future expense for performance stock option units | $	$ 900		$ 900
Restricted stock units | Vesting in Four Years
Share-based compensation
Granted (in shares)			1,730,545
Aggregate fair value of restricted stock units granted | $			$ 46,600
Restricted stock units | Time-Based Vesting Over Three Years
Share-based compensation
Granted (in shares)			947,054
Vesting period			3 years
Restricted stock units | Time-Based Vesting Over Two Years
Share-based compensation
Granted (in shares)			783,491
Vesting period			2 years
Restricted stock units | Time Based Vesting
Share-based compensation
Granted (in shares)			1,730,545
Vested in period, fair value | $			$ 28,000
Forfeited in period (in shares)			378,510
Outstanding at the end of the period (in shares)	4,471,115		4,471,115		4,009,759
Restricted stock units | Performance stock
Share-based compensation
Granted (in shares)			666,496		101,931
Aggregate fair value of restricted stock units granted | $			$ 21,000
Forfeited in period (in shares)			214,760
Outstanding at the end of the period (in shares)	1,105,357		1,105,357		709,589
The total fair value of performance-based restricted stock units | $			$ 1,400
Restricted stock units | Performance-Based Restricted Stock Units Under The Total Shareholder Return Performance Plan
Share-based compensation
Granted (in shares)			199,946
Aggregate fair value of restricted stock units granted | $			$ 8,400
Restricted stock units | Performance Shares Vesting Total Shareholder Return
Share-based compensation
Granted (in shares)						41,298
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 Based Stock Units Under Operating Metrics
Share-based compensation
Granted (in shares)					237,837
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 | ATS Performance Plan Vesting Total Shareholder Return
Share-based compensation
Granted (in shares)						36,425
Restricted stock units | 2021 Performance Shares That Will Vest Immediately
Share-based compensation
Hurdle achievement, percentage			77.00%
Forfeited in period (in shares)			27,959
Outstanding at the end of the period (in shares)	8,466		8,466
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)					45,000,000		49,000,000
Stock Option and Equity Compensation Plans | Employee stock purchase plan
Share-based compensation
Shares which remained available for future grants (in shares)	6,800,000		6,800,000
Operating Metrics Performance Plan | Restricted stock units
Share-based compensation
Vesting period			1 year
Award vesting rights percentage			50.00%
Forfeited in period (in shares)			58,308
Outstanding at the end of the period (in shares)	144,554		144,554
Operating Metrics Performance Plan | Restricted stock units | Performance stock
Share-based compensation
Granted (in shares)			466,550
Aggregate fair value of restricted stock units granted | $			$ 12,600
Operating Metrics Performance Plan | Restricted stock units | Performance Shares Vesting Total Shareholder Return | Minimum
Share-based compensation
Award vesting rights percentage			0.00%
Operating Metrics Performance Plan | Restricted stock units | Performance Shares Vesting Total Shareholder Return | Maximum
Share-based compensation
Award vesting rights percentage			200.00%
Qualified Employee Stock Purchase Plan | Employee stock purchase plan
Share-based compensation
Share-based compensation expense | $			$ 1,200