CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 101,606	$ 130,673
Marketable securities	238,797	189,563
Accounts receivable, less allowance of $1,634 and $1,247	131,429	123,656
Inventories, net	184,981	176,134
Prepaid expenses and other current assets	19,908	21,638
Total current assets	676,721	641,664
Property, plant and equipment, net	92,716	98,420
Goodwill	307,626	307,148
Identifiable intangible assets, net	330,923	371,953
Deferred income taxes	1,292	1,456
Other assets	21,437	27,939
Total assets	1,430,715	1,448,580
Current liabilities:
Accounts payable	37,486	27,738
Accrued liabilities	31,063	26,204
Deferred revenue	15,871	12,629
Other current liabilities	12,811	19,172
Total current liabilities	97,231	85,743
Deferred and other tax liabilities	64,278	67,040
Other non-current liabilities	31,523	31,771
Total liabilities	193,032	184,554
Commitments and contingencies
Stockholders’ equity:
Common stock	49	50
Additional paid-in capital	1,229,720	1,269,437
Accumulated other comprehensive income (loss)	1,666	(598)
Retained earnings (accumulated deficit)	6,248	(4,863)
Total stockholders’ equity	1,237,683	1,264,026
Total liabilities and stockholders’ equity	$ 1,430,715	$ 1,448,580