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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |  |
Net income | $ 1,021,294 | $ 333,040 | $ 830,555
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 615,152 | 591,035 | 777,485
Impairment charges | 124,892 | 61,981 | 981,589
Valuation adjustment on disposal group | 0 | 316,840 | 0
Debt prepayment, refinancing, and redemption charges | 33,402 | 0 | 0
Stock-based compensation expense | 67,850 | 73,061 | 35,092
Deferred income taxes | 41,723 | 273,660 | (395,217)
Equity investment income, net | 8,582 | 26,449 | 28,925
(Loss) gain on sales of business interests, net | 23,022 | (85,699) | (23,402)
Other non-cash charges, net | 49,579 | 82,374 | 66,920
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures: |  |  |
Accounts receivable | (79,957) | (81,176) | (156,305)
Inventories | 10,158 | 73,505 | (18,625)
Other receivables and other current assets | 2,790 | 236,995 | (111,432)
Other long-term assets | 6,965 | 3,497 | (11,945)
Accounts payable | (84,539) | (35,959) | 26,876
Accrued compensation and benefits | (14,697) | 84,165 | (78,239)
Other current liabilities | 181,940 | (157,462) | 1,908
Income taxes | 95,645 | (23,635) | (52,176)
Other long-term liabilities | (31,446) | (1,031) | 11,157
Net cash provided by operating activities | 2,072,355 | 1,771,640 | 1,913,166
Cash flows from investing activities: |  |  |
Additions of property and equipment | (766,546) | (987,138) | (905,250)
Acquisitions | (100,861) | (183,156) | (803,879)
Proceeds from asset and business sales | 3,877,392 | 150,205 | 92,336
Purchase of other debt and equity investments | (5,458) | (8,448) | (13,117)
Purchase of investments held-to-maturity | (101,462) | (5,963) | (228,990)
Proceeds from sale of other debt and equity investments | 3,676 | 9,526 | 6,408
Proceeds from investments held-to-maturity | 95,376 | 34,862 | 492,470
Purchase of equity investments | (9,366) | (19,177) | (4,816)
Distributions received on equity investments | 2,589 | 3,646 | 106
Net cash provided by (used in) investing activities | 2,995,340 | (1,005,643) | (1,364,732)
Cash flows from financing activities: |  |  |
Borrowings | 38,525,850 | 59,934,750 | 50,991,960
Payments on long-term debt and other financing costs | (40,606,041) | (59,239,973) | (50,837,112)
Purchase of treasury stock | (2,383,816) | (1,161,511) | (802,949)
Distributions to noncontrolling interests | (233,123) | (196,441) | (211,467)
Stock award exercises and other share issuances, net | 11,382 | 13,577 | 21,252
Contributions from noncontrolling interests | 57,317 | 52,311 | 74,552
Proceeds from sales of additional noncontrolling interests | 0 | 15 | 2,864
Purchases of noncontrolling interests | (68,019) | (28,082) | (5,357)
Net cash used in financing activities | (4,696,450) | (625,354) | (766,257)
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (1,760) | (3,350) | 254
Less: Net increase (decrease) in cash, cash equivalents and restricted cash from discontinued operations | 369,485 | 137,293 | (217,569)
Cash, cash equivalents and restricted cash of continuing operations at beginning of the year | 415,420 | 518,920 | 683,463
Cash, cash equivalents and restricted cash of continuing operations at end of the year | 1,208,718 | 415,420 | 518,920
Discontinued Operations |  |  |
Cash flows from financing activities: |  |  |
Less: Net increase (decrease) in cash, cash equivalents and restricted cash from discontinued operations | (423,813) | 240,793 | (53,026)
Continuing Operations |  |  |
Cash flows from financing activities: |  |  |
Less: Net increase (decrease) in cash, cash equivalents and restricted cash from discontinued operations | $ 793,298 | $ (103,500) | $ (164,543)

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- Definition Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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