Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
ASSETS:
Cash and cash equivalents	$ 607,584	$ 660,672
Short-term investments	424,226	453,973
Restricted investments	5,560	5,560
Accounts receivable, net	360,854	392,672
Inventories:
Raw materials	130,283	109,570
Work in process	149,542	146,131
Finished goods	348,576	298,306
Total inventories	628,401	554,007
Prepaid expenses	91,797	102,331
Other Receivables	8,913	3,814
Other current assets	5,249	7,126
Total current assets	2,132,584	2,180,155
Property, plant, and equipment	1,385,430	1,382,172
Less: accumulated depreciation and amortization	904,000	882,833
Property, plant and equipment, net	481,430	499,339
Operating lease right-of-use assets	197,588	201,868
Goodwill, net	291,504	264,131
Purchased intangibles, net	211,367	145,525
Other investments	6,703,039	4,638,205
Other assets	79,795	79,636
Total assets	10,097,307	8,008,859
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable	130,905	107,014
Accrued payroll and employee benefits	156,388	180,084
Current maturities of long-term debt and notes payable	426,502	426,172
Income and other taxes payable	32,019	36,285
Current operating lease liabilities	33,941	35,365
Other current liabilities	147,140	120,575
Total current liabilities	926,895	905,495
Long-term debt, net of current maturities	12,233	13,579
Deferred Income Tax Liabilities, Net	1,456,653	997,787
Operating lease liabilities	173,103	176,018
Other long-term liabilities	175,021	160,923
Total liabilities	2,743,905	2,253,802
Stockholders' equity:
Additional paid-in capital	429,485	410,020
Retained earnings	7,123,093	5,470,779
Accumulated other comprehensive loss	(61,142)	(87,348)
Total stockholders' equity	7,353,402	5,755,057
Total liabilities and stockholders' equity	10,097,307	8,008,859
Accounts receivable, less allowance for doubtful accounts	20,337	20,205
Common Class A [Member]
Stockholders' equity:
Common stock	$ 2	$ 2
Common Stock, Shares, Issued	25,007,469	24,966,035
Common Stock, Shares, Outstanding	24,586,408	24,835,804
Common Class B [Member]
Stockholders' equity:
Common stock	$ 1	$ 1
Common Stock, Shares, Issued	5,091,968	5,089,532
Common Stock, Shares, Outstanding	5,091,968	5,089,532
Treasury Class A [Member]
Stockholders' equity:
Treasury stock	$ (138,037)	$ (38,397)
Treasury Stock, Shares	421,061	130,231