CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Mar. 31, 2024		153,554,000
Beginning balance at Mar. 31, 2024	$ 2,107,468	$ 1,536	$ 243,050	$ 1,913,615	$ (50,733)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		2,000
Stock-based compensation	8,231		8,231
Shares issued upon vesting (in shares)		6,000
Shares issued upon vesting	0
Exercise of stock options (in shares)		54,000
Exercise of stock options	601	$ 1	600
Shares withheld for taxes	(495)		(495)
Repurchases of common stock (Note 8) (in shares)		(1,062,000)
Repurchases of common stock (Note 8)	(151,967)	$ (11)		(151,956)
Excise taxes related to repurchases of common stock	(1,181)			(1,181)
Net income	115,625			115,625
Total other comprehensive (loss) income	(3,800)				(3,800)
Ending balance (in shares) at Jun. 30, 2024		152,554,000
Ending balance at Jun. 30, 2024	2,074,482	$ 1,526	251,386	1,876,103	(54,533)
Beginning balance (in shares) at Mar. 31, 2024		153,554,000
Beginning balance at Mar. 31, 2024	$ 2,107,468	$ 1,536	243,050	1,913,615	(50,733)
Increase (Decrease) in Stockholders' Equity
Repurchases of common stock (Note 8) (in shares)	(2,022,299)
Repurchases of common stock (Note 8)	$ (301,011)
Net income	814,680
Total other comprehensive (loss) income	(4,711)
Ending balance (in shares) at Dec. 31, 2024		151,770,000
Ending balance at Dec. 31, 2024	2,630,919	$ 1,518	259,947	2,424,898	(55,444)
Beginning balance (in shares) at Jun. 30, 2024		152,554,000
Beginning balance at Jun. 30, 2024	2,074,482	$ 1,526	251,386	1,876,103	(54,533)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		2,000
Stock-based compensation	11,657		11,657
Shares issued upon vesting (in shares)		129,000
Shares issued upon vesting	1,638	$ 1	1,637
Exercise of stock options (in shares)		9,000
Exercise of stock options	93		93
Shares withheld for taxes	(12,561)		(12,561)
Repurchases of common stock (Note 8) (in shares)		(686,000)
Repurchases of common stock (Note 8)	(104,323)	$ (7)		(104,316)
Excise taxes related to repurchases of common stock	(843)			(843)
Net income	242,321			242,321
Total other comprehensive (loss) income	10,775				10,775
Ending balance (in shares) at Sep. 30, 2024		152,008,000
Ending balance at Sep. 30, 2024	2,223,239	$ 1,520	252,212	2,013,265	(43,758)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		2,000
Stock-based compensation	8,653		8,653
Shares issued upon vesting (in shares)		8,000
Shares issued upon vesting	0
Exercise of stock options (in shares)		27,000
Exercise of stock options	274		274
Shares withheld for taxes	(1,192)		(1,192)
Repurchases of common stock (Note 8) (in shares)		(275,000)
Repurchases of common stock (Note 8)	(44,721)	$ (2)		(44,719)
Excise taxes related to repurchases of common stock	(382)			(382)
Net income	456,734			456,734
Total other comprehensive (loss) income	(11,686)				(11,686)
Ending balance (in shares) at Dec. 31, 2024		151,770,000
Ending balance at Dec. 31, 2024	$ 2,630,919	$ 1,518	259,947	2,424,898	(55,444)
Beginning balance (in shares) at Mar. 31, 2025	150,201,000	150,201,000
Beginning balance at Mar. 31, 2025	$ 2,513,013	$ 1,502	253,466	2,307,699	(49,654)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		3,000
Stock-based compensation	8,553		8,553
Shares issued upon vesting (in shares)		4,000
Shares issued upon vesting	0
Shares withheld for taxes	(237)		(237)
Repurchases of common stock (Note 8) (in shares)		(1,666,000)
Repurchases of common stock (Note 8)	(182,991)	$ (17)		(182,974)
Excise taxes related to repurchases of common stock	(1,627)			(1,627)
Net income	139,203			139,203
Total other comprehensive (loss) income	(8,435)				(8,435)
Ending balance (in shares) at Jun. 30, 2025		148,542,000
Ending balance at Jun. 30, 2025	$ 2,467,479	$ 1,485	261,782	2,262,301	(58,089)
Beginning balance (in shares) at Mar. 31, 2025	150,201,000	150,201,000
Beginning balance at Mar. 31, 2025	$ 2,513,013	$ 1,502	253,466	2,307,699	(49,654)
Increase (Decrease) in Stockholders' Equity
Repurchases of common stock (Note 8) (in shares)	(8,019,067)
Repurchases of common stock (Note 8)	$ (813,488)
Net income	888,500
Total other comprehensive (loss) income	$ 3,586
Ending balance (in shares) at Dec. 31, 2025	142,331,000	142,331,000
Ending balance at Dec. 31, 2025	$ 2,609,454	$ 1,423	279,114	2,374,985	(46,068)
Beginning balance (in shares) at Jun. 30, 2025		148,542,000
Beginning balance at Jun. 30, 2025	2,467,479	$ 1,485	261,782	2,262,301	(58,089)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		2,000
Stock-based compensation	11,336		11,336
Shares issued upon vesting (in shares)		126,000
Shares issued upon vesting	2,228	$ 2	2,226
Shares withheld for taxes	(7,437)		(7,437)
Repurchases of common stock (Note 8) (in shares)		(2,580,000)
Repurchases of common stock (Note 8)	(281,997)	$ (26)		(281,971)
Excise taxes related to repurchases of common stock	(2,709)			(2,709)
Net income	268,152			268,152
Total other comprehensive (loss) income	8,978				8,978
Ending balance (in shares) at Sep. 30, 2025		146,090,000
Ending balance at Sep. 30, 2025	2,466,030	$ 1,461	267,907	2,245,773	(49,111)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		8,000
Stock-based compensation	11,602		11,602
Shares issued upon vesting (in shares)		6,000
Shares issued upon vesting	0
Shares withheld for taxes	(395)		(395)
Repurchases of common stock (Note 8) (in shares)		(3,773,000)
Repurchases of common stock (Note 8)	(348,500)	$ (38)		(348,462)
Excise taxes related to repurchases of common stock	(3,471)			(3,471)
Net income	481,145			481,145
Total other comprehensive (loss) income	$ 3,043				3,043
Ending balance (in shares) at Dec. 31, 2025	142,331,000	142,331,000
Ending balance at Dec. 31, 2025	$ 2,609,454	$ 1,423	$ 279,114	$ 2,374,985	$ (46,068)