Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS:
Cash and cash equivalents	$ 431,526	$ 383,824
Short-term investments	413,270	371,154
Restricted investments	5,560	5,560
Accounts receivable, less allowance for doubtful accounts	392,443	464,847
Inventories:
Raw materials	108,008	113,925
Work in process	145,051	142,589
Finished goods	330,756	338,290
Total inventories	583,815	594,804
Prepaid expenses	187,249	146,135
Other current assets	9,615	10,325
Total current assets	2,023,478	1,976,649
Property, plant and equipment:
Land and improvements	25,185	18,026
Buildings and leasehold improvements	331,563	315,984
Equipment	970,081	971,140
Total property, plant and equipment	1,326,829	1,305,150
Less: accumulated depreciation and amortization	(818,139)	(811,654)
Property, plant and equipment, net	508,690	493,496
Goodwill, net	219,770	506,069
Purchased intangibles, net	133,123	174,113
Other investments	2,655,709	1,027,736
Other assets	70,298	94,949
Total assets	5,611,068	4,273,012
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable	122,450	135,182
Accrued payroll and employee benefits	143,510	171,632
Current maturities of long-term debt	493	420
Income taxes payable	27,513	19,802
Other taxes payable	28,675	20,139
Deferred revenue	26,936	28,233
Other current liabilities	101,218	127,288
Total current liabilities	450,795	502,696
Long-term debt, net of current maturities	438,937	434,581
Deferred income taxes	553,239	222,209
Other long-term liabilities	147,766	183,276
Total liabilities	1,590,737	1,342,762
Commitments and contingent liabilities
Stockholders' equity:
Preferred stock	0	0
Additional paid-in capital	394,342	361,231
Retained earnings	3,722,073	1,830,439
Accumulated other comprehensive (loss) income	(46,958)	738,794
Total stockholders' equity	4,020,331	2,930,250
Total liabilities and stockholders' equity	5,611,068	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	(49,040)	(128)
Treasury Class B [Member]
Stockholders' equity:
Treasury Stock, Value	$ (89)	$ (89)

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
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