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CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Cash flows from operating activities: |  |
Net income | $ 962,330 | $ 760,307
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 505,852 | 468,949
Debt prepayment, refinancing and redemption charges | 0 | 86,957
Stock-based compensation expense | 75,898 | 67,217
Deferred income taxes | 56,724 | 191,783
Equity investment (income) loss, net | (1,687) | 3,026
Loss on sales of business interests, net | 0 | 16,252
Other non-cash charges, net | 13,418 | (7,980)
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures: |  |
Accounts receivable | (205,792) | (12,405)
Inventories | (2,490) | (8,445)
Other receivables and prepaid and other current assets | 144,967 | (62,025)
Other long-term assets | (19,663) | (1,853)
Accounts payable | (47,412) | 445
Accrued compensation and benefits | (7,176) | (12,124)
Other current liabilities | (87,842) | 123,833
Income taxes | 22,609 | (100,160)
Other long-term liabilities | (8,748) | (19,547)
Net cash provided by operating activities | 1,400,988 | 1,494,230
Cash flows from investing activities: |  |
Additions of property and equipment | (451,909) | (449,896)
Acquisitions | (45,143) | (112,597)
Proceeds from asset and business sales | 46,578 | 83,339
Purchase of debt investments held-to-maturity | (13,274) | (147,829)
Purchase of other debt and equity investments | (2,609) | (3,388)
Proceeds from debt investments held-to-maturity | 13,274 | 148,341
Proceeds from sale of other debt and equity investments | 11,976 | 3,434
Purchase of intangible assets | (745) | 0
Purchase of equity method investments | (7,925) | (9,613)
Distributions from equity method investments | 1,592 | 902
Net cash used in investing activities | (448,185) | (487,307)
Cash flows from financing activities: |  |
Borrowings | 1,613,036 | 3,826,484
Payments on long-term debt | (812,659) | (3,927,411)
Deferred financing costs | (9,091) | (105,705)
Purchase of treasury stock | (882,411) | (1,025,878)
Distributions to noncontrolling interests | (177,146) | (179,098)
Net payments related to stock purchases and awards | (59,849) |
Net payments related to stock purchases and awards |  | 3,838
Contributions from noncontrolling interests | 28,295 | 32,854
Proceeds from sales of additional noncontrolling interest | 2,880 | 0
Purchases of noncontrolling interests | (11,658) | (6,782)
Net cash used in financing activities | (308,603) | (1,381,698)
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (7,381) | (16,606)
Net increase (decrease) in cash, cash equivalents and restricted cash | 636,819 | (391,381)
Cash, cash equivalents and restricted cash of continuing operations at beginning of the year | 501,790 | 1,208,718
Cash, cash equivalents and restricted cash of continuing operations at end of the year | 1,138,609 | 817,337
Discontinued Operations |  |
Cash flows from financing activities: |  |
Net increase (decrease) in cash, cash equivalents and restricted cash | 0 | 0
Continuing Operations |  |
Cash flows from financing activities: |  |
Net increase (decrease) in cash, cash equivalents and restricted cash | $ 636,819 | $ (391,381)

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