Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS:
Cash and cash equivalents	$ 407,272	$ 383,824
Short-term investments	355,661	371,154
Restricted investments	5,560	5,560
Accounts receivable, net	430,361	464,847
Inventories:
Raw materials	115,135	113,925
Work in process	142,935	142,589
Finished goods	354,147	338,290
Total inventories	612,217	594,804
Other current assets	166,045	156,460
Total current assets	1,977,116	1,976,649
Property, plant and equipment, at cost	1,320,930	1,305,150
Less: accumulated depreciation and amortization	(821,222)	(811,654)
Property, plant and equipment, net	499,708	493,496
Goodwill, net	510,359	506,069
Purchased intangibles, net	168,212	174,113
Other investments	2,981,768	1,027,736
Other assets	77,749	94,949
Total assets	6,214,912	4,273,012
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable, accrued payroll and employee benefits	259,365	306,814
Current maturities of long-term debt and notes payable	369	420
Income and other taxes payable	42,377	39,941
Other current liabilities	154,087	155,521
Total current liabilities	456,198	502,696
Long-term debt, net of current maturities	434,678	434,581
Deferred income taxes	644,957	222,209
Other long-term liabilities	190,988	183,276
Total liabilities	1,726,821	1,342,762
Stockholders' equity:
Additional paid-in capital	370,988	361,231
Retained earnings	4,013,232	1,830,439
Accumulated other comprehensive income	104,085	738,794
Total stockholders' equity	4,488,091	2,930,250
Total liabilities and stockholders' equity	6,214,912	4,273,012
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	(128)	(128)
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.