CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 29, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 587,998	$ 796,280
Investments	87,775	938,944
Accounts receivable, net	518,520	568,316
Inventories	351,552	291,569
Other current assets	74,556	68,054
Total current assets	1,620,401	2,663,163
Property, plant and equipment, net	368,878	343,083
Intangible assets, net	244,094	246,902
Goodwill	355,890	355,614
Operating lease assets	91,060
Other assets	142,599	118,664
Total assets	2,822,922	3,727,426
Current liabilities:
Notes payable and debt	100,295	178
Accounts payable	67,397	68,168
Accrued employee compensation	36,464	64,545
Deferred revenue and customer advances	220,711	164,965
Current operating lease liabilities	25,106
Accrued treasury stock repurchases	9,874	23,005
Accrued income taxes	38,517	22,943
Accrued warranty	11,583	12,300
Other current liabilities	101,749	92,827
Total current liabilities	611,696	448,931
Long-term liabilities:
Long-term debt	1,048,394	1,148,172
Long-term income tax liabilities	393,297	430,866
Long-term operating lease liabilities	66,713
Long-term portion of retirement benefits	55,825	55,853
Other long-term liabilities	90,752	76,346
Total long-term liabilities	1,654,981	1,711,237
Total liabilities	2,266,677	2,160,168
Commitments and contingencies (Notes 6, 7, 8 and 12)
Stockholders' equity:
Preferred stock, par value $0.01 per share, 5,000 shares authorized, none issued at June 29, 2019 and December 31, 2018
Common stock, par value $0.01 per share, 400,000 shares authorized, 160,841 and 160,472 shares issued, 67,620 and 73,115 shares outstanding at June 29, 2019 and December 31, 2018, respectively	1,608	1,605
Additional paid-in capital	1,883,958	1,834,741
Retained earnings	6,248,601	5,995,205
Treasury stock, at cost, 93,221 and 87,357 shares at June 29, 2019 and December 31, 2018, respectively	(7,462,826)	(6,146,322)
Accumulated other comprehensive loss	(115,096)	(117,971)
Total stockholders' equity	556,245	1,567,258
Total liabilities and stockholders' equity	$ 2,822,922	$ 3,727,426

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