CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (149,264)	$ (113,971)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	172,630	142,763
Amortization of debt issuance costs	4,062	3,188
Stock-based compensation	41,499	30,709
Deferred income taxes	(66,171)	(39,987)
Provision for excess and obsolete inventories	19,076	4,881
Restructuring and related charges	47,096	20,711
Cash payments for restructuring charges	(29,885)	(11,222)
Other operating activities	3,201	9,070
Changes in assets and liabilities, net of acquisition:
Accounts receivable, net	34,634	(35,938)
Inventory, net	(49,320)	11,018
Current and other assets	24,142	30,456
Accounts payable	(10,690)	16,519
Accrued liabilities	(46,906)	72,677
Income taxes	22,251	(21,631)
Cash provided by operating activities	16,355	119,243
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sales of investments	177	125,799
Proceeds from maturities of investments	0	131,017
Purchase of investments	(972)	(698)
Cash paid for acquisition, net of cash acquired	0	(1,642,241)
Capital expenditures	(16,984)	(16,148)
Proceeds from sale of property and equipment	2,142	0
Cash used for investing activities	(15,637)	(1,402,271)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchase of common stock	0	4,780
Employees' tax withheld and paid for restricted stock and restricted stock units	(9,669)	(13,863)
Proceeds from issuances under stock-based compensation plans	6,617	14,925
Proceeds from debt issuance, net	0	1,244,713
Payment of cash dividends	(17,910)	(16,953)
Repayments of long-term debt	(25,000)	0
Cash (used for) by financing activities	(45,962)	1,224,042
Effect of exchange rate changes on cash and cash equivalents	(444)	(3,519)
Net decrease in cash and cash equivalents	(45,688)	(62,505)
Cash and cash equivalents at beginning of period	202,509	390,661
Cash and cash equivalents at end of period	156,821	328,156
SUPPLEMENTAL NON-CASH DISCLOSURES
Cash paid for income taxes	9,853	30,902
Cash paid for interest	$ 68,039	$ 54,386