SHAREHOLDERS' EQUITY AND EQUITY COMPENSATION - Narrative (Details) $ / shares in Units, $ in Thousands								3 Months Ended			6 Months Ended		12 Months Ended
	May 07, 2024 $ / shares	Mar. 20, 2024 shares	Feb. 20, 2024 USD ($) account $ / shares shares	Nov. 15, 2023 USD ($)	Apr. 19, 2023 USD ($) $ / shares	Feb. 17, 2022 shares	Jan. 30, 2020 shares	Mar. 31, 2024 USD ($) executive $ / shares shares	Dec. 31, 2023 USD ($) executive $ / shares shares	Mar. 31, 2023 $ / shares	Mar. 31, 2024 USD ($) executive $ / shares shares	Mar. 31, 2023 $ / shares	Sep. 30, 2023 dividend $ / shares	Apr. 18, 2023 USD ($)	Jan. 31, 2018 shares
Class of Stock [Line Items]
Common stock, dividends, per share, cash paid (in dollars per share) | $ / shares								$ 0.15		$ 0.10	$ 0.30	$ 0.20
Number of quarterly dividends | dividend													2
Number of additional shares authorized for award (in shares)						1,200,000
Reissuance of shares in treasury for award under share-based payment arrangement (in shares)											570,269
Stock repurchase program, authorized amount, period income (decrease) | $				$ 200,000	$ 200,000
Stock repurchase program, remaining authorized repurchase amount | $					$ 257,955			$ 120,158			$ 120,158			$ 57,955
Stock repurchased during period (in shares)			1,500,000					1,803,424			3,437,878
Stock repurchased during period | $			$ 98,250					$ 117,384			$ 187,024
Stock repurchased during period, cost (in dollars per share) | $ / shares			$ 65.50					$ 65.09			$ 54.40
Number of separately managed accounts | account			4
Stock repurchase program, exercise tax accrued during period | $								$ 715			$ 1,411
Stock repurchase program, exercise tax accrued | $								$ 2,712			$ 2,712
Restricted Stock and Restricted Stock Units
Class of Stock [Line Items]
Equity instruments other than options, grants in period (in shares)								403,997	174,104
Restricted Stock and Restricted Stock Units | Executives and Key Employees
Class of Stock [Line Items]
Award vesting period									36 months
Number of executive officers granted shares | executive									43
Equity instruments other than options, granted in period, fair value | $									$ 8,225
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares									$ 47.24
Restricted Stock and Restricted Stock Units | Senior Executives
Class of Stock [Line Items]
Award vesting period								33 months
Restricted Stock and Restricted Stock Units | Minimum
Class of Stock [Line Items]
Award vesting period											3 years
Restricted Stock and Restricted Stock Units | Maximum
Class of Stock [Line Items]
Award vesting period											4 years
Restricted Stock Award
Class of Stock [Line Items]
Shares paid for tax withholding for share based compensation (in shares)								374,700			595,929
Shares paid for tax withholding for share based compensation, value | $								$ 22,722			$ 34,326
Shares paid for tax withholding for share based compensation, value per share (in dollars per share) | $ / shares								$ 60.64			$ 57.60
Restricted Stock Award | Non-employees, directors
Class of Stock [Line Items]
Award vesting period								1 year
Equity instruments other than options, grants in period (in shares)								16,775
Equity instruments other than options, granted in period, fair value | $								$ 1,210
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares								$ 72.13
Restricted Stock Award | Executives and Key Employees
Class of Stock [Line Items]
Equity instruments other than options, grants in period (in shares)									166,272
Restricted Stock Award | Senior Executives
Class of Stock [Line Items]
Number of executive officers granted shares | executive											4
Restricted Stock Units | Executives and Key Employees
Class of Stock [Line Items]
Equity instruments other than options, grants in period (in shares)									7,832
Restricted Stock Subject to Performance Conditions | Senior Executives
Class of Stock [Line Items]
Number of executive officers granted shares | executive								4
Award post-vesting holding period								2 years
Target number of shares to be vested if performance condition is attained (in shares)								129,074
Equity instruments other than options, granted in period, fair value | $								$ 12,181
Equity instruments other than options, grants in period, weighted average grant date fair value (in dollars per share) | $ / shares								$ 94.37
Restricted Stock Subject to Performance Conditions | Minimum | Senior Executives
Class of Stock [Line Items]
Number of shares to be vested if performance condition is attained (in shares)								64,539
Restricted Stock Subject to Performance Conditions | Maximum | Senior Executives
Class of Stock [Line Items]
Number of shares to be vested if performance condition is attained (in shares)								387,222
Incentive Plan
Class of Stock [Line Items]
Number of shares authorized for award (in shares)								8,850,000			8,850,000				1,000,000
Number of additional shares authorized for award (in shares)		2,600,000					1,700,000
Share-based compensation arrangement by share-based payment award, expiration period						10 years
Maximum percentage of exercise price at grant date fair value						100.00%
Number of shares available for grant (in shares)								2,377,532			2,377,532
Incentive Plan | Incentive Stock Options
Class of Stock [Line Items]
Number of shares authorized for award (in shares)								600,000			600,000
Quarterly Dividends
Class of Stock [Line Items]
Common stock, dividends, per share, cash paid (in dollars per share) | $ / shares											$ 0.15		$ 0.45
Quarterly Dividends | Subsequent Event
Class of Stock [Line Items]
Dividends declared, amount per share (in dollars per share) | $ / shares	$ 0.15
Quarterly Dividends, One
Class of Stock [Line Items]
Number of quarterly dividends | dividend													2
Dividends declared, amount per share (in dollars per share) | $ / shares													$ 0.10
Quarterly Dividends, Two
Class of Stock [Line Items]
Number of quarterly dividends | dividend													2
Dividends declared, amount per share (in dollars per share) | $ / shares													$ 0.125
Special Cash Dividends
Class of Stock [Line Items]
Dividends declared, amount per share (in dollars per share) | $ / shares					$ 2.00