CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 129,388	$ 130,673
Marketable securities	182,673	189,563
Accounts receivable, less allowance of $1,665 and $1,247	137,529	123,656
Inventories, net	171,836	176,134
Prepaid expenses and other current assets	23,486	21,638
Total current assets	644,912	641,664
Property, plant and equipment, net	95,517	98,420
Goodwill	307,626	307,148
Identifiable intangible assets, net	344,569	371,953
Deferred income taxes	1,285	1,456
Other assets	22,863	27,939
Total assets	1,416,772	1,448,580
Current liabilities:
Accounts payable	34,318	27,738
Accrued liabilities	35,131	26,204
Deferred revenue	15,656	12,629
Other current liabilities	13,610	19,172
Total current liabilities	98,715	85,743
Deferred and other tax liabilities	66,271	67,040
Other non-current liabilities	30,577	31,771
Total liabilities	195,563	184,554
Commitments and contingencies
Stockholders’ equity:
Common stock	49	50
Additional paid-in capital	1,223,068	1,269,437
Accumulated other comprehensive loss	(65)	(598)
Accumulated deficit	(1,843)	(4,863)
Total stockholders’ equity	1,221,209	1,264,026
Total liabilities and stockholders’ equity	$ 1,416,772	$ 1,448,580