CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income	$ 383,130	$ 349,117
Reconciliation of net income to net cash used in by operating activities:
Depreciation, amortization, and accretion	31,202	30,637
Amortization on cloud computing arrangements	1,154	420
Bad debt (benefit) expense	(254)	6,392
Deferred tax (benefit) expense	(4,263)	1,859
Stock-based compensation	18,281	17,559
Loss on disposal of long-lived assets	37	259
Impairment of operating lease and other long-lived assets	3,186	4,060
Gain on settlement of asset retirement obligations	0	(207)
Changes in operating assets and liabilities:
Trade accounts receivable, net	(118,568)	(133,708)
Inventories	(272,508)	6,321
Prepaid expenses and other current assets	(33,936)	(32,387)
Income tax receivable	(7,743)	(2,305)
Net operating lease assets and lease liabilities	2,643	1,652
Other assets	(27,331)	(3,023)
Trade accounts payable	246,964	152,797
Other accrued expenses	10,782	75,658
Income tax payable	(10,151)	45,843
Other long-term liabilities	4,745	1,318
Net cash provided by operating activities	227,370	522,262
INVESTING ACTIVITIES
Purchases of property and equipment	(41,315)	(21,300)
Proceeds from sales of property and equipment	0	49
Net cash used in investing activities	(41,315)	(21,251)
FINANCING ACTIVITIES
Proceeds from short-term borrowings	0	9,100
Repayments of short-term borrowings	0	(9,478)
Proceeds from issuance of stock	914	698
Proceeds from exercise of stock options	1,204	5,583
Repurchases of common stock	(266,684)	0
Cash paid for shares withheld for taxes	(13,776)	(7,203)
Repayments of mortgage principal	0	(470)
Net cash used in financing activities	(278,342)	(1,770)
Effect of foreign currency exchange rates on cash and cash equivalents	1,187	7,879
Net change in cash and cash equivalents	(91,100)	507,120
Cash and cash equivalents at beginning of period	1,089,361	649,436
Cash and cash equivalents at end of period	998,261	1,156,556
Cash paid during the period
Income taxes, net of refunds of $77 and $1,489, as of December 31, 2021 and 2020, respectively	124,651	56,957
Interest	1,399	2,336
Operating leases	43,257	43,263
Non-cash investing activities
Accrued for purchases of property and equipment	240	1,900
Accrued for asset retirement obligations	3,702	1,595
Leasehold improvements acquired through tenant allowances	$ 4,061	$ 0