Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Current Assets:
Cash and cash equivalents	$ 819,540	$ 688,087
Short-term investments	5,842	4,455
Receivables, net	219,072	190,426
Inventories	28,558	33,209
Prepaid expenses and other	56,042	63,811
Total current assets	1,129,054	979,988
Property, plant and equipment, net of accumulated depreciation of $677,737 and $658,377, respectively	252,193	251,342
Goodwill	663,320	666,009
Acquired intangibles, net	251,385	278,835
Long-term receivables	4,740	12,239
Other assets	227,173	230,301
Total assets	2,527,865	2,418,714
Current Liabilities:
Revolving credit facility	0	85,000
Current portion of long-term debt	299,879	0
Accounts payable and accrued liabilities	243,158	221,101
Current portion of deferred revenue	327,078	336,297
Total current liabilities	870,115	642,398
Long-Term Liabilities:
Long-term portion of deferred revenue	46,912	61,513
Long-term debt	344,939	644,369
Other long-term liabilities	77,911	81,232
Total long-term liabilities	469,762	787,114
Commitments and contingencies
Stockholders' Equity:
Common stock and capital in excess of par value	1,861,135	1,829,950
Treasury stock, at cost	(1,234,941)	(1,178,121)
Retained earnings	574,966	341,003
Accumulated other comprehensive loss	(13,172)	(3,630)
Total stockholders’ equity	1,187,988	989,202
Total liabilities and stockholders’ equity	$ 2,527,865	$ 2,418,714

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.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, more than one year from the balance sheet date, for goods or services 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.