Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ASSETS:
Cash and cash equivalents	$ 456,264	$ 457,549
Short-term investments	383,176	328,718
Restricted investments	4,560	4,210
Accounts receivable, less allowance for doubtful accounts	372,348	391,485
Inventories:
Raw materials	116,540	109,928
Work in process	125,982	114,438
Finished goods	282,439	265,858
Total inventories	524,961	490,224
Prepaid expenses	91,014	94,369
Other current assets	12,201	11,041
Total current assets	1,844,524	1,777,596
Property, plant and equipment:
Land and improvements	17,895	17,823
Buildings and leasehold improvements	290,367	276,070
Equipment	919,126	823,193
Total property, plant and equipment	1,227,388	1,117,086
Less: accumulated depreciation and amortization	(738,774)	(679,396)
Property, plant and equipment, net	488,614	437,690
Goodwill, net	477,115	495,948
Purchased intangibles, net	161,609	214,026
Other investments	830,790	719,840
Other assets	47,852	64,618
Total assets	3,850,504	3,709,718
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable	133,109	122,391
Accrued payroll and employee benefits	163,364	157,857
Notes payable and current maturities of long-term debt	334	298
Income and other taxes payable	28,124	29,339
Deferred revenue	31,003	29,683
Other current liabilities	115,388	101,783
Total current liabilities	471,322	441,351
Long-term debt, net of current maturities	434,186	433,883
Deferred income taxes	222,919	233,475
Other long-term liabilities	135,318	110,506
Total liabilities	1,263,745	1,219,215
Commitments and contingent liabilities
Stockholders' equity:
Preferred stock	0	0
Additional paid-in capital	332,911	300,408
Retained earnings	1,836,180	1,808,055
Accumulated other comprehensive income	417,766	382,138
Total stockholders' equity	2,586,759	2,490,503
Total liabilities and stockholders' equity	3,850,504	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)

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.