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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash flows from operating activities:    
Net income (loss) $ 359,743 $ (79,444)
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 304,356 225,957
Deferred income taxes (46,939) (17,820)
Share-based compensation expense related to equity incentive plans 46,018 83,969
Loss on settlement of convertible debt 13,826 0
Amortization of debt discount on convertible debt 52,306 24,413
Amortization of debt issuance costs 3,339 2,118
Losses on equity method investments 111 112
Gains on sale of assets (5,381) (75)
Losses on write-down of fixed assets 53 317
Impairment of intangible assets 215 1,984
Realized losses on available-for-sale investment 0 89
Realized gains on equity method investment 0 (468)
Amortization of premium on available-for-sale investments 593 0
Changes in operating assets and liabilities, excluding impact of acquisitions:    
Increase in accounts receivable (67,043) (25,432)
(Increase) decrease in inventories (40,149) 215,950
Increase in deferred income on shipments to distributors 31,548 39,764
Increase (decrease) in accounts payable and accrued liabilities 25,806 (22,017)
Change in other assets and liabilities 16,721 (13,641)
Operating cash flows related to discontinued operations 0 10,314
Net cash provided by operating activities 695,123 446,090
Cash flows from investing activities:    
Purchases of available-for-sale investments (879,437) (25)
Maturities of available-for-sale investments 363,086 350
Sales of available-for-sale investments 0 470,215
Sale of equity method investment 0 468
Acquisition of Atmel, net of cash acquired 0 (2,747,516)
Investments in other assets (3,838) (3,232)
Proceeds from sale of assets 10,241 66
Capital expenditures (82,025) (36,646)
Net cash used in investing activities (591,973) (2,316,320)
Cash flows from financing activities:    
Payments on conversion of convertible debt [1] (15,166) 0
Repayments of revolving loan under credit facility [1] (113,000) (951,500)
Proceeds from borrowings on revolving loan under credit facility [1] 113,000 1,385,000
Deferred financing costs [1] (814) 0
Payment of cash dividends [1] (167,448) (154,877)
Proceeds from sale of common stock [1] 19,568 25,452
Tax payments related to shares withheld for vested restricted stock units [1] (21,176) (35,843)
Capital lease payments [1] (391) (391)
Net cash (used in) provided by financing activities [1] (185,427) 267,841
Effect of foreign exchange rate changes on cash and cash equivalents 0 (374)
Net decrease in cash and cash equivalents (82,277) (1,602,763)
Cash and cash equivalents at beginning of period 908,684 2,092,751
Cash and cash equivalents at end of period $ 826,407 $ 489,988
[1] During the six months ended September 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.