CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ (44,871)	$ 14,471
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	57,698	5,248
Amortization of debt issuance costs	1,361	362
Stock-based compensation	12,904	8,150
Deferred income taxes	(33,145)	4,632
Provision for excess and obsolete inventories	1,760	612
Restructuring and related charges (credits)	19,525	1,320
Cash payments for restructuring charges	(17,658)	(835)
Other operating activities	1,965	(274)
Changes in assets and liabilities, net of acquisition:
Accounts receivable, net	21,445	5,302
Inventory, net	(42,309)	(400)
Current and other assets	15,498	2,981
Accounts payable	36,392	5,688
Accrued liabilities	(43,784)	(7,300)
Income taxes	21,568	(7,875)
Cash provided by operating activities	8,349	32,082
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sales of investments	170	124,640
Proceeds from maturities of investments	0	131,017
Purchase of investments	(651)	(394)
Cash paid for acquisition, net of cash acquired	0	(33,550)
Capital expenditures	(4,507)	(3,868)
Cash (used for) provided by investing activities	(4,988)	217,845
CASH FLOWS FROM FINANCING ACTIVITIES
Employees' tax withheld and paid for restricted stock and restricted stock units	(8,621)	(13,035)
Proceeds from issuances under stock-based compensation plans	589	10,558
Payment of cash dividends	(5,940)	(5,014)
Cash (used for) by financing activities	(13,972)	(7,491)
Effect of exchange rate changes on cash and cash equivalents	6	(2,055)
Net increase (decrease) in cash and cash equivalents	(10,605)	240,381
Cash and cash equivalents at beginning of period	202,509	390,661
Cash and cash equivalents at end of period	191,904	631,042
SUPPLEMENTAL NON-CASH DISCLOSURES
Cash paid for income taxes	2,755	30,902
Cash paid for interest	$ 29,203	$ 54,386