Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS:
Cash and cash equivalents	$ 383,824	$ 456,264
Short-term investments	371,154	383,176
Restricted investments	5,560	4,560
Accounts receivable, less allowance for doubtful accounts	464,847	372,348
Inventories:
Raw materials	113,925	116,540
Work in process	142,589	125,982
Finished goods	338,290	282,439
Total inventories	594,804	524,961
Prepaid expenses	146,135	91,014
Other current assets	10,325	12,201
Total current assets	1,976,649	1,844,524
Property, plant and equipment:
Land and improvements	18,026	17,895
Buildings and leasehold improvements	315,984	300,834
Equipment	971,140	908,659
Total property, plant and equipment	1,305,150	1,227,388
Less: accumulated depreciation and amortization	(811,654)	(738,774)
Property, plant and equipment, net	493,496	488,614
Goodwill, net	506,069	477,115
Purchased intangibles, net	174,113	161,609
Other investments	1,027,736	830,790
Other assets	94,949	47,852
Total assets	4,273,012	3,850,504
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable	135,182	133,109
Accrued payroll and employee benefits	171,632	163,364
Notes payable and current maturities of long-term debt	420	334
Income and other taxes payable	39,941	28,124
Deferred revenue	28,233	31,003
Other current liabilities	127,288	115,388
Total current liabilities	502,696	471,322
Long-term debt, net of current maturities	434,581	434,186
Deferred income taxes	222,209	225,299
Other long-term liabilities	183,276	140,537
Total liabilities	1,342,762	1,271,344
Commitments and contingent liabilities
Stockholders' equity:
Preferred stock	0	0
Additional paid-in capital	361,231	332,911
Retained earnings	1,830,439	1,828,581
Accumulated other comprehensive income	738,794	417,766
Total stockholders' equity	2,930,250	2,579,160
Total liabilities and stockholders' equity	4,273,012	3,850,504
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)	(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).

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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.