Common Stock and Stock Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost charged against income	$ 80,385,000	$ 83,631,000	$ 82,112,000
PSUs weighted average performance	150.00%
Compensation costs capitalized	$ 8,100,000	$ 10,700,000	$ 12,900,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period over which unrecognized compensation cost is expected to be recognized	7 months 6 days
Vesting period	4 years
Award contractual term	6 years
Number of Shares, Options granted	35,000
Weighted average estimated fair value of stock options granted	$ 9.87	$ 15.73	$ 16.49
Stock options exercised intrinsic value	$ 0		$ 0
Employee Stock Option | Minimum [Member] | Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year			1 year
Employee Stock Option | Maximum [Member] | Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Market-based Performance Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan description	The Company grants total shareholder return (TSR) performance stock options to executive officers under the Equity Participation Plan. The number of shares of TSR performance stock options that will become eligible to vest based on the time-based vesting schedule described below is based on a comparison over a four-year performance period of the Company’s TSR to the TSR of the companies included in the S&P Mid Cap 400 Index. The number of options that may become vested and exercisable will range from 0% to 175% of the target number of options based on the Company’s relative TSR ranking for the performance period. The Company’s TSR performance stock options have a four-year time-based vesting schedule and a six-year contractual term. The TSR performance stock options must be vested under both the time-based vesting schedule and the performance-based vesting conditions in order to become exercisable. In fiscal year 2024, the Company granted price hurdle performance stock options to executive officers and certain other high-level employees under the Equity Participation Plan. The price hurdle performance stock options must be vested under both a three-year time-based vesting schedule and a market-based vesting condition in order to become exercisable. The number of options that may become vested and exercisable will range from 0% to 250% of the target number of options granted provided that depending on whether the forty-five calendar day trailing average market closing price of the Company's common stock ending on and including such date equals or exceeds certain levels. The Company estimates the fair value of the TSR performance stock options and the price hurdle performance stock options (collectively, the market-based performance stock options) at the grant date using a Monte Carlo simulation.
Weighted average period over which unrecognized compensation cost is expected to be recognized	1 year 1 month 6 days
Vesting period	4 years
Award contractual term	6 years
Number of Shares, Options granted	0
Weighted average estimated fair value of stock options granted		$ 16.01	$ 25.06
RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost charged against income	$ 56,600,000	$ 57,400,000	$ 59,100,000
Weighted average period over which unrecognized compensation cost is expected to be recognized	2 years
Weighted average estimated fair value of restricted stock units granted	$ 15.77	$ 29.21	$ 35.04
Total fair value of shares vested related to restricted stock units	$ 15,300,000	$ 34,100,000	$ 46,900,000
RSU [Member] | Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
RSU [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
RSU [Member] | Minimum [Member] | Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				1 year
RSU [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
PSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost charged against income	$ 5,100,000
Weighted average period over which unrecognized compensation cost is expected to be recognized	1 year 8 months 12 days
Weighted average estimated fair value of restricted stock units granted	$ 18.13
Market Condition PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Market Condition PSUs [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued, as a percentage	0.00%
Market Condition PSUs [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued, as a percentage	175.00%
Performance Condition PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Performance Condition PSUs [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued, as a percentage	0.00%
Performance Condition PSUs [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued, as a percentage	175.00%
Performance Condition PSUs [Member] | Performance Based Vesting Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Equity Participation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares reserved for issuance	59,401,000
Plan description	Shares of the Company’s common stock granted under the Equity Participation Plan as an award other than as an option or as a stock appreciation right with a per share purchase price lower than 100% of fair market value on the date of grant are counted against the Equity Participation Plan share reserve as two shares for each share of common stock subject to such awards.
2024 Employment Inducement Incentive Award Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares reserved for issuance	377,500
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares reserved for issuance	11,950,000
Discount on the fair market value of common stock purchased under the Employee Stock Purchase Plan	85.00%
Compensation cost charged against income	$ 7,500,000	$ 8,000,000	$ 7,100,000
Unrecognized compensation cost related to unvested stock-based compensation arrangements	$ 2,900,000
Weighted average period over which unrecognized compensation cost is expected to be recognized	6 months
Weighted average estimated fair value of employee stock purchase plan shares issued	$ 5.22	$ 8.79	$ 10.3
Equity Participation Plan and Inducement Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost charged against income	$ 72,900,000	$ 75,600,000	$ 75,000,000
Unrecognized compensation cost related to unvested stock-based compensation arrangements	$ 125,200,000