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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Statement of Cash Flows [Abstract] |  |
Cash and cash equivalents at beginning of year | $ 1,137,303 | $ 2,269,756
Cash flows from operating activities: |  |
Net income | 449,611 | 176,346
Adjustments to reconcile net income to cash flows from operating activities: |  |
Depreciation and amortization | 100,804 | 94,192
Gain on acquisition | 0 | (7,433)
Gain on sale of business | (218,705) | 0
Stock-based compensation | 8,076 | 9,492
Equity in net income of unconsolidated investments (net of tax) | (39,646) | (36,219)
Dividends received from unconsolidated investments and nonmarketable securities | 30,045 | 8,454
Pension and postretirement benefit | (1,793) | (7)
Pension and postretirement contributions | (7,089) | (6,288)
Unrealized gain on investments in marketable securities | (625) | (1,553)
Loss on early extinguishment of debt | 0 | 52,801
Deferred income taxes | 30,708 | (3,204)
Working capital changes | (91,189) | (353,138)
Other, net | (36,340) | 12,102
Net cash provided by (used in) operating activities | 223,857 | (54,455)
Cash flows from investing activities: |  |
Acquisitions, net of cash acquired | (7,643) | (39,525)
Capital expenditures | (280,945) | (97,765)
Cash proceeds from divestitures, net | 416,711 | 6,857
Sales of marketable securities, net | (439) | 208
Repayments from joint ventures | 0 | 1,250
Investments in equity and other corporate investments | (1,979) | 0
Net cash provided by (used in) investing activities | 125,705 | (128,975)
Cash flows from financing activities: |  |
Repayments of long-term debt | 0 | (751,209)
Other (repayments) borrowings, net | (211,833) | 58,886
Fees related to early extinguishment of debt | 0 | (46,959)
Dividends paid to shareholders | (72,484) | (69,762)
Dividends paid to noncontrolling interests | (7,378) | (17,930)
Repurchases of common stock | (250,000) | (250,000)
Proceeds from exercise of stock options | 1,288 | 3,337
Withholding taxes paid on stock-based compensation award distributions | (16,460) | (8,169)
Net cash used in financing activities | (556,867) | (1,081,806)
Net effect of foreign exchange on cash and cash equivalents | (21,854) | 2,425
Decrease in cash and cash equivalents | (229,159) | (1,262,811)
Cash and cash equivalents at end of period | $ 908,144 | $ 1,006,945

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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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