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17. Quarterly Financial Data (Details) - USD ($)
$ / shares in Units, $ 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
Quantifying Misstatement in Current Year Financial Statements [Line Items]                      
Unrealized Gain on Securities $ 646,000               $ 2,030,987 $ 606,230 $ 0
Net sales 624,500 $ 560,600 $ 572,600 $ 554,000 $ 616,900 $ 545,100 $ 575,900 $ 551,500 2,311,659 2,289,415 2,160,153
Operating Income (Loss)                 229,661 (103,341) 119,250
Cost of Goods and Services Sold                 1,054,663 1,066,264 972,450
Gross profit 330,400 307,000 307,800 311,800 332,600 286,700 301,700 302,200 1,256,996 1,223,151 1,187,703
Selling, general and administrative expense                 824,625 834,783 806,790
Research and development expense                 202,710 199,196 250,157
Unrealized Loss on Securities   390,600     814,100            
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
Earnings Per Share, Basic $ 18.50 $ (8.68) $ 20.08 $ 29.03 $ (27.73) $ 9.02 $ 8.99 $ 22.05 $ 58.93 $ 12.25 $ 4.12
Earnings Per Share, Diluted $ 18.31 $ (8.68) $ 19.86 $ 28.74 $ (27.73) $ 8.89 $ 8.87 $ 21.77 $ 58.27 $ 12.10 $ 4.07
Income Tax Expense (Benefit)                 $ (502,406) $ (147,045) $ 24,444
Impairment losses on goodwill and long-lived assets         $ 292,500       $ 0 $ 292,513 $ 11,506