Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 655,998	$ 465,232
Short-term investments	3,229	3,057
Receivables, net	153,154	157,171
Inventories	31,894	39,475
Prepaid expenses and other	39,175	37,099
Total current assets	883,450	702,034
Property, plant and equipment, net of accumulated depreciation of $634,418 and $612,961, respectively	249,140	238,607
Goodwill	575,025	572,764
Acquired intangibles, net of accumulated amortization of $269,859 and $267,723, respectively	229,783	258,814
Long-term receivables	13,340	12,949
Other assets	316,961	311,740
Total assets	2,267,699	2,096,908
Current Liabilities:
Revolving credit facility	0	50,000
Accounts payable and accrued liabilities	222,216	239,496
Current portion of deferred revenue	322,509	296,066
Total current liabilities	544,725	585,562
Long-Term Liabilities:
Long-term portion of deferred revenue	60,158	66,769
Long-term debt	643,927	643,493
Other long-term liabilities	67,096	59,314
Total long-term liabilities	771,181	769,576
Commitments and contingencies
Stockholders' Equity:
Common stock and capital in excess of par value	1,848,719	1,820,081
Treasury stock, at cost	(1,156,626)	(1,190,053)
Retained earnings	274,288	136,902
Accumulated other comprehensive loss	(14,588)	(25,160)
Total stockholders’ equity	951,793	741,770
Total liabilities and stockholders’ equity	$ 2,267,699	$ 2,096,908