SUPPLEMENTAL BALANCE SHEET INFORMATOIN

12 Months Ended

Dec. 28, 2019

Supplemental Balance Sheet Information [Abstract]

The composition of trade receivables, net is as follows:



	December 28, 2019			December 29, 2018
	(in thousands)
Client receivables	$	395,740		$	370,131
Unbilled revenue	121,957			105,216
Total	517,697			475,347
Less: Allowance for doubtful accounts	(3,664		)	(3,099		)
Trade receivables, net	$	514,033		$	472,248

Net provisions of $3.0 million, $2.1 million, and $0.9 million were recorded to the allowance for doubtful accounts in fiscal years 2019, 2018, and 2017, respectively.

The composition of inventories is as follows:



	December 28, 2019		December 29, 2018
	(in thousands)
Raw materials and supplies	$	24,613	$	22,378
Work in process	35,852		21,732
Finished products	100,195		83,782
Inventories	$	160,660	$	127,892

The composition of other current assets is as follows:



	December 28, 2019		December 29, 2018
	(in thousands)
Prepaid income tax	$	54,358	$	47,157
Short-term investments	941		885
Restricted cash	431		465
Other	300		300
Other current assets	$	56,030	$	48,807

The composition of property, plant and equipment, net is as follows:



	December 28, 2019			December 29, 2018
	(in thousands)
Land	$	63,077		$	52,266
Buildings ⁽¹⁾	1,006,357			938,184
Machinery and equipment ⁽¹⁾	585,965			501,894
Leasehold improvements	84,630			59,854
Furniture and fixtures	28,304			26,700
Computer hardware and software ⁽¹⁾	179,865			166,398
Vehicles ⁽¹⁾	5,561			5,167
Construction in progress	67,939			56,549
Total	2,021,698			1,807,012
Less: Accumulated depreciation	(977,570		)	(874,135		)
Property, plant and equipment, net	$	1,044,128		$	932,877

⁽¹⁾ These balances include assets under finance leases. See Note 16, “Leases.”

Depreciation expense in fiscal years 2019, 2018 and 2017 was $108.6 million, $96.9 million and $89.8 million, respectively.

The composition of other assets is as follows:



	December 28, 2019		December 29, 2018
	(in thousands)
Venture capital investments	$	108,983	$	87,545
Other investments	13,996		1,046
Life insurance policies	38,207		32,340
Restricted cash	1,601		1,411
Other	49,828		21,417
Other assets	$	212,615	$	143,759

The composition of other current liabilities is as follows:



	December 28, 2019		December 29, 2018
	(in thousands)
Current portion of operating lease right-of-use liabilities	$	20,357	$	—
Accrued income taxes	26,066		24,120
Customer contract deposits	33,080		38,245
Other	11,095		8,915
Other current liabilities	$	90,598	$	71,280

The composition of other long-term liabilities is as follows:



	December 28, 2019		December 29, 2018
	(in thousands)
U.S. Transition Tax	$	52,066	$	52,064
Long-term pension liability	43,054		24,671
Accrued executive supplemental life insurance retirement plan and deferred compensation plan	37,779		36,086
Long-term deferred revenue	20,983		34,420
Other	29,051		31,880
Other long-term liabilities	$	182,933	$	179,121