Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS:
Cash and cash equivalents	$ 455,890	$ 431,526
Short-term investments	403,099	413,270
Restricted investments	5,560	5,560
Accounts receivable, net	391,699	392,443
Inventories:
Raw materials	105,683	108,008
Work in process	149,601	145,051
Finished goods	335,154	330,756
Total inventories	590,438	583,815
Prepaid expenses	163,959	187,249
Other current assets	20,998	9,615
Total current assets	2,031,643	2,023,478
Property, plant and equipment, at cost	1,330,536	1,326,829
Less: accumulated depreciation and amortization	(827,584)	(818,139)
Property, plant and equipment, net	502,952	508,690
Operating lease right-of-use asset	221,597	0
Goodwill, net	230,541	219,770
Purchased intangibles, net	139,382	133,123
Other investments	3,671,912	2,655,709
Other assets	64,887	70,298
Total assets	6,862,914	5,611,068
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable, accrued payroll and employee benefits	239,018	265,960
Current maturities of long-term debt and notes payable	1,757	493
Income and other taxes payable	41,967	56,188
Current operating lease liabilities	34,413	0
Other current liabilities	127,151	128,154
Total current liabilities	444,306	450,795
Long-term debt, net of current maturities	437,606	438,937
Deferred income taxes	780,905	553,239
Operating lease liabilities	192,558	0
Other long-term liabilities	143,684	147,766
Total liabilities	1,999,059	1,590,737
Stockholders' equity:
Additional paid-in capital	402,847	394,342
Retained earnings	4,585,701	3,722,073
Accumulated other comprehensive income	(80,965)	(46,958)
Total Stockholders' Equity	4,863,855	4,020,331
Total liabilities and stockholders' equity	6,862,914	5,611,068
Common Class A [Member]
Stockholders' equity:
Common stock	2	2
Common Class B [Member]
Stockholders' equity:
Common stock	1	1
Treasury Class A [Member]
Stockholders' equity:
Treasury Stock, Value	(43,642)	(49,040)
Treasury Class B [Member]
Stockholders' equity:
Treasury Stock, Value	$ (89)	$ (89)

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

Name:	us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682