Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS:
Cash and cash equivalents	$ 403,615	$ 457,549
Short-term investments	345,045	328,718
Restricted investments	4,210	4,210
Accounts receivable, net	381,100	391,485
Inventories:
Raw materials	115,329	109,928
Work in process	121,489	114,438
Finished goods	296,494	265,858
Total inventories	533,312	490,224
Other current assets	107,982	105,410
Total current assets	1,775,264	1,777,596
Property, plant and equipment, at cost	1,159,054	1,117,086
Less: accumulated depreciation and amortization	(709,828)	(679,396)
Property, plant and equipment, net	449,226	437,690
Goodwill, net	509,582	495,948
Purchased intangibles, net	242,264	214,026
Other investments	711,437	719,840
Other assets	65,640	64,618
Total assets	3,753,413	3,709,718
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable, accrued payroll and employee benefits	241,249	280,248
Current maturities of long-term debt and notes payable	296	298
Income and other taxes payable	27,725	29,339
Other current liabilities	131,618	131,466
Total current liabilities	400,888	441,351
Long-term debt, net of current maturities	433,980	433,883
Other long-term liabilities	374,096	343,981
Total liabilities	1,208,964	1,219,215
Stockholders' equity:
Additional paid-in capital	308,876	300,408
Retained earnings	1,820,331	1,808,055
Accumulated other comprehensive income	415,340	382,138
Total stockholders' equity	2,544,449	2,490,503
Total liabilities and stockholders' equity	3,753,413	3,709,718
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	(12)	(12)
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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3-4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 3
-Subparagraph a(1)
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 4
-Article 5