CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2017	Jan. 01, 2017
Cash flows from operating activities:
Net income (loss)	$ (32,847)	$ 80,273
Adjustments:
Depreciation	19,395	14,940
Amortization of intangible assets	32,004	18,313
Amortization of debt issuance costs and debt discount	11,056	9,928
Assets impairment	0	2,180
Net gain from divestitures	0	675
Stock-based compensation expense, net of amounts capitalized in inventory	38,348	29,602
Deferred income tax	62,622	(7,297)
Changes in assets and liabilities, net of acquisition
Accounts receivable, net	(5,582)	(8,596)
Inventories	6,913	8,167
Prepayments and other assets	1,748	201
Accounts payable	(4,656)	2,092
Accrued compensation and related expenses	4,277	(21,535)
Deferred income on shipments to distributors	1,536	(1,467)
Income taxes payable and receivable	32,062	121
Other accrued liabilities and long-term liabilities	(3,824)	8,240
Net cash provided by operating activities	163,052	134,487
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(237,716)	(1,528)
Asset acquisition	(12,956)	0
Proceeds from divestitures	0	231
Investment in convertible note	0	1,955
Purchases of property, plant and equipment, net	(24,018)	(21,388)
Purchases of intangible assets	(3,581)	(4,896)
Purchase of non-marketable equity security	(11,341)	0
Purchases of short-term investments	(199,140)	(256,163)
Proceeds from sales of short-term investments	93,003	105,529
Proceeds from maturities of short-term investments	33,668	22,776
Net cash used in investing activities	(362,081)	(157,394)
Cash flows from financing activities:
Proceeds from issuance of common stock	7,843	14,082
Repurchase of common stock	(84,811)	(73,481)
Payment of capital lease obligations	(935)	(1,183)
Proceeds of Initial Term B Loan, net of discount and issuance costs	194,252	0
Payment of Initial Term B Loan principal	1,500	0
Net cash provided by (used in) financing activities	114,849	(60,582)
Effect of exchange rates on cash and cash equivalents	2,426	(2,417)
Net decrease in cash and cash equivalents	(81,754)	(85,906)
Cash and cash equivalents at beginning of period	214,554	203,231
Cash and cash equivalents at end of period	132,800	117,325
Non-cash investing activities:
Additions to property, plant and equipment included in accounts payable	1,314	3,030
Conversion of investment in convertible note to ordinary shares of stock	0	(1,955)
Fair value of partially vested employee equity awards related to pre-combination services that were assumed as part of the business acquisition	3,400	0
Additions to intangible assets included in accounts payable and other accrued liabilities	1,446	0
Contingent consideration in connection with the asset acquisition included in other accrued liabilities and other long-term liabilities	$ 4,080	$ 0