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v3.21.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 04, 2021 | Mar. 29, 2020
Cash flows from operating activities: |  |
Net income | $ 69,848 | $ 20,477
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Stock-based compensation expense | 12,009 | 14,790
Depreciation of property, plant, and equipment | 4,259 | 5,631
Loss (gain) on disposal of property, plant, and equipment | 3 | 2
Amortization of intangible assets | 927 | 1,388
Excess and obsolete inventory charges | 705 | 1,065
Amortization of discounts or premiums on investments | 586 | 106
Realized gain on sale of investments | 0 | (1,850)
Credit loss on investments | 0 | 160
Change in deferred income taxes | 1,250 | (1,826)
Accounts receivable | (3,495) | 2,182
Unbilled revenue | 3,958 | (703)
Inventories | (1,323) | 3,889
Prepaid expenses and other current assets | (10,882) | (9,788)
Accounts payable | 4,760 | (1,613)
Accrued expenses | (15,973) | 12,720
Accrued income taxes | 1,651 | 7,650
Deferred revenue and customer deposits | 30,641 | 11,961
Other | (285) | (4,206)
Net cash provided by operating activities | 98,639 | 62,035
Cash flows from investing activities: |  |
Purchases of investments | (298,911) | (199,530)
Maturities and sales of investments | 160,552 | 262,126
Purchases of property, plant, and equipment | (2,436) | (3,074)
Net cash provided by (used in) investing activities | (140,795) | 59,522
Cash flows from financing activities: |  |
Net proceeds from issuance of common stock under stock plans | 34,744 | 9,971
Repurchase of common stock | (6,479) | (51,036)
Payment of dividends | (10,595) | (9,503)
Net cash provided by (used in) financing activities | 17,670 | (50,568)
Effect of foreign exchange rate changes on cash and cash equivalents | (1,899) | (3,223)
Net change in cash and cash equivalents | (26,385) | 67,766
Cash and cash equivalents at beginning of period | 269,073 | 171,431
Cash and cash equivalents at end of period | $ 242,688 | $ 239,197

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