CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES
Net income	$ 357,946	$ 242,099
Reconciliation of net income to net cash provided by (used in) operating activities:
Depreciation, amortization, and accretion	33,750	25,138
Amortization on cloud computing arrangements	1,082	1,131
Bad debt expense	8,845	6,905
Deferred tax expense (benefit)	1,295	(1,266)
Stock-based compensation	19,916	16,719
Loss on disposal of assets	2,811	145
Impairment of operating lease and other long-lived assets	0	793
Changes in operating assets and liabilities:
Trade accounts receivable, net	(249,306)	(193,071)
Inventories	(306,855)	(193,480)
Prepaid expenses and other current assets	182	(35,269)
Income tax receivable	9,737	(8,488)
Net operating lease assets and lease liabilities	(778)	8,909
Other assets	(7,018)	(1,886)
Trade accounts payable	155,774	215,374
Other accrued expenses	(21,506)	(1,479)
Income tax payable	23,582	44,171
Other long-term liabilities	(7,357)	(4,917)
Net cash provided by operating activities	22,100	121,528
INVESTING ACTIVITIES
Purchases of property and equipment	(45,367)	(57,436)
Proceeds from sale of assets	10,925	34
Net cash used in investing activities	(34,442)	(57,402)
FINANCING ACTIVITIES
Proceeds from issuance of stock	1,638	1,165
Proceeds from exercise of stock options	694	1,081
Repurchases of common stock	(256,290)	(210,938)
Cash paid for shares withheld for taxes	(13,056)	(8,457)
Net cash used in financing activities	(267,014)	(217,149)
Effect of foreign currency exchange rates on cash and cash equivalents	2,986	(5,721)
Net change in cash and cash equivalents	(276,370)	(158,744)
Cash and cash equivalents at beginning of period	1,502,051	981,795
Cash and cash equivalents at end of period	1,225,681	823,051
Cash paid during the period
Income taxes	90,833	47,150
Interest	798	955
Operating leases	33,269	31,370
Non-cash investing activities
Changes in trade accounts payable and other accrued expenses for purchases of property and equipment	2,309	(12,957)
Accrued for asset retirement obligation assets related to leasehold improvements	1,372	718
Leasehold improvements acquired through tenant allowances	0	8,127
Non-cash financing activities
Accrued excise taxes related to repurchases of common stock	$ 2,024	$ 1,816