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4. Supplemental Cash Flow Information - (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Supplemental Cash Flow Elements [Abstract] |  |
Net Income Attributable to Parent | $ 977,414 | $ 685,912
Share-based Compensation | 11,700 | 9,700
(Gain) Loss on Sale of Securities, Net | (100) | (400)
Other than temporary impairment losses on investments | 800 | 0
Changes in fair market value of equity securities | (1,179,400) | (827,700)
Loss on Disposition of Property Plant Equipment | 300 | 100
Changes in fair value of contingent consideration | 0 | (100)
Decrease in accounts receivable | 1,300 | 2,200
Decrease (increase) in inventories | 5,800 | (13,700)
Increase in other current assets | (37,500) | (9,500)
Decrease in accounts payable and other current liabilities | (44,500) | (25,600)
Increase in income taxes payable | 27,300 | 20,900
Increase in deferred income taxes | 274,800 | 171,800
Increase in other long term liabilities | 43,800 | 15,700
Reduction in the carrying amount of right-of-use assets | 9,800 | 9,600
Depreciation and amortization | 32,700 | 33,600
Other | (700) | (400)
Payments of operating lease liabilities | (9,900) | (9,300)
Net cash provided by operating activities | 113,610 | 62,808
Noncash or Part Noncash Acquisition, Investments Acquired | 0 | 2,700
Noncash or Part Noncash Acquisition, Fixed Assets Acquired | $ 4,700 | $ 6,000

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