Nature of Operations and Summary of Significant Accounting Policies - Change in Accounting Principle (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Loss Contingencies [Line Items]
Cost of Goods and Services Sold	$ 2,798,147	$ 2,568,702	$ 1,764,419
Gross Profit	2,159,692	2,016,362	1,343,100
Operating Income (Loss)	268,185	425,618	548,368
Income Tax Expense (Benefit)	51,535	71,633	120,663
Net income	105,813	242,870	396,870
Net Income (Loss) Attributable to Parent	$ 107,030	$ 243,888	$ 397,400
Earnings Per Share, Basic	$ 1.07	$ 2.50	$ 4.66
Earnings Per Share, Diluted	$ 1.07	$ 2.48	$ 4.63
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (3,872)	$ 95,323	$ 571,620
Inventory, Net	695,493	574,999
Retained earnings	1,911,533	1,999,244
Increase (Decrease) in Inventories	(123,921)	(102,922)	3,769
Accruals and other, net	(22,054)	(16,398)	9,916
Deferred income taxes	(185,913)	(106,620)	4,240
Product [Member]
Loss Contingencies [Line Items]
Cost of Goods and Services Sold	$ 1,513,970	$ 1,419,925	$ 765,076