CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 29, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 593,494	$ 773,924
Marketable securities	211,001	137,303
Accounts receivable, less allowance for doubtful accounts of $1,813 and $1,736 at March 29, 2020 and December 31, 2019, respectively	487,365	362,368
Inventories, net	182,978	196,691
Prepayments and other current assets	227,740	188,598
Total current assets	1,702,578	1,658,884
Property, plant and equipment, net	332,241	320,216
Operating lease right-of-use assets, net	58,808	57,539
Marketable securities	100,513	104,490
Deferred tax assets	74,493	75,185
Retirement plans assets	18,229	18,457
Other assets	9,272	10,332
Acquired intangible assets, net	114,321	125,480
Goodwill	409,933	416,431
Total assets	2,820,388	2,787,014
Current liabilities:
Accounts payable	129,633	126,617
Accrued employees' compensation and withholdings	119,226	163,883
Deferred revenue and customer advances	98,815	104,876
Other accrued liabilities	87,274	70,871
Operating lease liabilities	19,591	19,476
Contingent consideration	662	9,106
Income taxes payable	58,760	44,200
Total current liabilities	513,961	539,029
Retirement plans liabilities	125,970	134,471
Long-term deferred revenue and customer advances	50,791	45,974
Long-term other accrued liabilities	19,941	19,535
Long-term contingent consideration	19,810	30,599
Deferred tax liabilities	11,628	14,070
Long-term operating lease liabilities	46,328	45,849
Long-term incomes taxes payable	82,820	82,642
Debt	398,466	394,687
Total liabilities	1,269,715	1,306,856
Commitments and contingencies (See Note Q)
SHAREHOLDERS' EQUITY
Common stock, $0.125 par value, 1,000,000 shares authorized, 165,938 and 166,410 shares issued and outstanding at March 29, 2020 and December 31, 2019, respectively	20,742	20,801
Additional paid-in capital	1,721,367	1,720,129
Accumulated other comprehensive loss	(27,113)	(18,854)
Accumulated deficit	(164,323)	(241,918)
Total shareholders' equity	1,550,673	1,480,158
Total liabilities and shareholders' equity	$ 2,820,388	$ 2,787,014