CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)		$ 170,587	$ (113,363)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		151,801	113,141
Deferred income taxes		(21,878)	32,906
Share-based compensation expense related to equity incentive plans		22,408	59,579
Loss on settlement of convertible debt		13,826	0
Amortization of debt discount on convertible debt		25,953	12,106
Amortization of debt issuance costs		1,621	1,057
Losses on equity method investments		55	56
Gains on sale of assets		(4,565)	(61)
Losses on write-down of fixed assets		48	269
Impairment of intangible assets		128	1,984
Realized losses on available-for-sale investment		0	82
Realized gains on equity method investment		0	(468)
Amortization of premium on available-for-sale investments		476	13
Changes in operating assets and liabilities, excluding impact of acquisitions:
(Increase) in accounts receivable		(50,581)	(9,901)
(Increase) decrease in inventories		(9,904)	121,102
Increase in deferred income on shipments to distributors		15,982	29,739
Increase (decrease) in accounts payable and accrued liabilities		36,331	(18,000)
Change in other assets and liabilities		(7,296)	(12,270)
Operating cash flows related to discontinued operations		0	5,996
Net cash provided by operating activities		344,992	223,967
Cash flows from investing activities:
Purchases of available-for-sale investments		(487,435)	(25)
Sales and maturities of available-for-sale investments		110,000	470,551
Sale of equity method investment		0	468
Acquisition of Atmel, net of cash acquired		0	(2,747,516)
Investments in other assets		(1,933)	(765)
Proceeds from sale of assets		10,226	52
Capital expenditures		(22,130)	(18,494)
Net cash used in investing activities		(391,272)	(2,295,729)
Cash flows from financing activities: (1)
Repayments of revolving loan under credit facility	[1]	(60,000)	(602,000)
Proceeds from borrowings on revolving loan under credit facility	[1]	60,000	1,280,000
Payment of cash dividends	[1]	(82,928)	(77,237)
Proceeds from sale of common stock	[1]	4,474	4,630
Tax payments related to shares withheld for vested restricted stock units	[1]	(10,719)	(25,183)
Capital lease payments	[1]	(195)	(195)
Net cash (used in) provided by financing activities	[1]	(89,368)	580,015
Effect of foreign exchange rate changes on cash and cash equivalents		0	(478)
Net decrease in cash and cash equivalents		(135,648)	(1,492,225)
Cash and cash equivalents at beginning of period		908,684	2,092,751
Cash and cash equivalents at end of period		$ 773,036	$ 600,526

[1] During the three months ended June 30, 2017, the Company issued $111.3 million principal amount of 2017 Junior Notes and 3.2 million shares of common stock in exchange for $111.3 million principal amount of 2007 Junior Notes. Refer to Note 13 Debt and Credit Facility for further discussion.