CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 29, 2019		Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 593,939		$ 926,752
Marketable securities	342,538		190,096
Accounts receivable, less allowance for doubtful accounts of $1,770 and $1,673 at September 29, 2019 and December 31, 2018, respectively	357,886		291,267
Inventories, net	178,203		153,541
Prepayments and other current assets	182,013		170,826
Total current assets	1,654,579		1,732,482
Property, plant and equipment, net	307,567		279,821
Operating lease right-of-use assets, net	57,595
Marketable securities	103,558		87,731
Deferred tax assets	69,120		70,848
Other assets	22,724		11,509
Retirement plans assets	16,358		16,883
Acquired intangible assets, net	96,573		125,482
Goodwill	370,717		381,850
Total assets	2,698,791	[1]	2,706,606
Current liabilities:
Accounts payable	117,936		100,688
Accrued employees' compensation and withholdings	127,912		148,566
Deferred revenue and customer advances	95,936		77,711
Other accrued liabilities	93,736		78,272
Operating lease liabilities	18,386
Contingent consideration	6,297		34,865
Income taxes payable	33,508		36,185
Total current liabilities	493,711		476,287
Retirement plans liabilities	121,340		117,456
Long-term deferred revenue and customer advances	42,592		32,750
Deferred tax liabilities	15,390		20,662
Long-term other accrued liabilities	9,803		37,547
Long-term contingent consideration	11,783		35,678
Long-term operating lease liabilities	46,813
Long-term income taxes payable	83,782		83,891
Debt	390,942		379,981
Total liabilities	1,216,156		1,184,252
Commitments and contingencies (See Note S)
SHAREHOLDERS' EQUITY
Common stock, $0.125 par value, 1,000,000 shares authorized; 168,490 and 175,522 shares issued and outstanding at September 29, 2019 and December 31, 2018, respectively	21,061		21,940
Additional paid-in capital	1,712,185		1,671,645
Accumulated other comprehensive loss	(24,221)		(13,040)
Accumulated deficit	(226,390)		(158,191)
Total shareholders' equity	1,482,635		1,522,354
Total liabilities and shareholders' equity	$ 2,698,791		$ 2,706,606

[1] Total business assets are directly attributable to each business. Corporate assets consist of cash and cash equivalents, marketable securities and certain other assets.