CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 338,987	$ 118,278
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	22,601	21,386
Amortization of intangible assets	15,239	13,735
Loss on investments	2,519	63
Share-based compensation expense	44,900	26,470
Deferred income taxes	20,152	(8,978)
Change in fair value of contingent consideration for business acquisition	5,716	0
Other	(1,877)	(2)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable, net	(346,838)	(85,955)
Inventories	(161,120)	(47,773)
Other assets	(31,567)	(14,083)
Accounts payable	399,176	129,101
Accrued and other liabilities	90,631	(9,223)
Net cash provided by operating activities	398,519	143,019
Cash flows from investing activities:
Purchases of property, plant and equipment	(27,774)	(18,092)
Investment in privately held companies	(3,405)	(170)
Acquisitions, net of cash acquired	0	(366)
Purchases of trading investments	(8,199)	(2,525)
Proceeds from sales of trading investments	8,839	2,571
Net cash used in investing activities	(30,539)	(18,582)
Cash flows from financing activities:
Payment of cash dividends	(146,705)	(124,180)
Purchases of registered shares	(22,454)	(15,127)
Proceeds from exercises of stock options and purchase rights	26,066	9,331
Tax withholdings related to net share settlements of restricted stock units	(25,744)	(20,908)
Net cash used in financing activities	(168,837)	(150,884)
Effect of exchange rate changes on cash and cash equivalents	2,512	(3,605)
Net increase (decrease) in cash and cash equivalents	201,655	(30,052)
Cash and cash equivalents, beginning of the period	715,566	604,516
Cash and cash equivalents, end of the period	917,221	574,464
Non-cash investing activities:
Property, plant and equipment purchased during the period and included in period end liability accounts	$ 9,594	$ 4,412