CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
OPERATING ACTIVITIES
Net income	$ 407,355	$ 357,946
Reconciliation of net income to net cash provided by (used in) operating activities:
Depreciation, amortization, and accretion	39,171	33,750
Amortization on cloud computing arrangements	1,117	1,082
Bad debt expense	17,319	8,845
Deferred tax (benefit) expense	(9,209)	1,295
Stock-based compensation	19,891	19,916
Loss on disposal of assets	1,128	2,811
Impairment of property and equipment	100	0
Changes in operating assets and liabilities:
Trade accounts receivable, net	(223,211)	(249,306)
Inventories	(340,367)	(306,855)
Prepaid expenses and other current assets	(70,115)	182
Income tax receivable	28,547	9,737
Net operating lease assets and lease liabilities	5,133	(778)
Other assets	(14,822)	(7,018)
Trade accounts payable	177,305	155,774
Other accrued expenses	(41,621)	(21,506)
Income tax payable	42,685	23,582
Other long-term liabilities	3,827	(7,357)
Net cash provided by operating activities	44,233	22,100
INVESTING ACTIVITIES
Purchases of property and equipment	(45,943)	(45,367)
Proceeds from sale of assets	11	10,925
Net cash used in investing activities	(45,932)	(34,442)
FINANCING ACTIVITIES
Proceeds from issuance of stock	2,228	1,638
Proceeds from exercise of stock options	0	694
Repurchases of common stock	(464,987)	(256,290)
Cash paid for excise taxes related to repurchases of common stock	(5,042)	0
Cash paid for shares withheld for taxes	(7,674)	(13,056)
Net cash used in financing activities	(475,475)	(267,014)
Effect of foreign currency exchange rates on cash and cash equivalents	2,465	2,986
Net change in cash and cash equivalents	(474,709)	(276,370)
Cash and cash equivalents at beginning of period	1,889,188	1,502,051
Cash and cash equivalents at end of period	1,414,479	1,225,681
Cash paid during the period
Income taxes	62,566	90,833
Interest	1,230	798
Operating leases	43,138	33,269
Non-cash investing activities
Changes in trade accounts payable and other accrued expenses for purchases of property and equipment	(4,945)	2,309
Accrued for asset retirement obligation assets related to leasehold improvements	5,476	1,372
Non-cash financing activities
Accrued excise taxes related to repurchases of common stock	$ 4,336	$ 2,024