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11. Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other Significant Noncash Transactions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | $ 553,500 | $ (258,800) | $ 598,800 | $ 865,200 | $ (828,500) | $ 269,300 | $ 268,000 | $ 656,800 | $ 1,758,675 | $ 365,614 | $ 122,249
Depreciation and amortization |  |  |  |  |  |  |  |  | 134,200 | 138,100 | 148,700
Reduction in the carrying amount of right-of-use assets |  |  |  |  |  |  |  |  | 40,300 | 0 | 0
Share-based compensation |  |  |  |  |  |  |  |  | 35,600 | 27,800 | 23,400
Gains on disposition of securities |  |  |  |  |  |  |  |  | (1,500) | (1,600) | (100)
Other than Temporary Impairment Losses on Investments |  |  |  |  |  |  |  |  | 5,800 | 800 | 7,000
Changes in fair market value of equity securities |  |  |  |  |  |  |  |  | (2,031,000) | (606,200) | 0
Losses on dispositions of fixed assets |  |  |  |  |  |  |  |  | 1,200 | 2,000 | 8,100
Gain on sale of land |  |  |  |  |  |  |  |  | 0 | (4,100) | 0
Gain on divestiture of product line |  |  |  |  |  |  |  |  | 0 | 5,100 | 0
Payments for operating lease liabilities |  |  |  |  |  |  |  |  | 38,600 | 0 | 0
Changes in fair value of contingent consideration |  |  |  |  |  |  |  |  | (1,600) | (6,200) | (18,100)
Decrease (increase) in accounts receivable, net |  |  |  |  |  |  |  |  | 1,600 | 59,700 | (64,100)
Decrease (increase) in inventories, net |  |  |  |  |  |  |  |  | 24,200 | (12,900) | (47,700)
Decrease (increase) in Other Current Assets |  |  |  |  |  |  |  |  | 61,800 | (15,300) | (35,700)
Increase (decrease) in accounts payable and other current liabilities |  |  |  |  |  |  |  |  | 10,600 | (45,600) | 7,800
Decrease in Income Taxes Payable |  |  |  |  |  |  |  |  | (4,200) | (20,900) | (22,400)
Increase (decrease) in deferred income taxes |  |  |  |  |  |  |  |  | 450,200 | 120,900 | (82,000)
(Increase) decrease in other long term assets |  |  |  |  |  |  |  |  | (1,700) | 1,100 | 2,300
Increase (decrease) in Other Long Term Liabilities |  |  |  |  |  |  |  |  | 13,400 | (10,000) | 38,100
Impairment losses on goodwill and long-lived assets |  |  |  |  | $ 292,500 |  |  |  | 0 | 292,513 | 11,506
Increase (Decrease) in Other Operating Assets and Liabilities, Net |  |  |  |  |  |  |  |  | 1,100 | (4,900) | (5,100)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 457,897 | 285,494 | 104,137
Noncash purchased property, plant and equipment |  |  |  |  |  |  |  |  | 8,100 | 5,700 | 0
Noncash Purchased Marketable Securities and Investments |  |  |  |  |  |  |  |  | 1,400 | 800 | 2,800
Noncash or Part Noncash Acquisition, Accounts Receivable Acquired |  |  |  |  |  |  |  |  | $ 1,300 | $ 0 | $ 300

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