SUPPLEMENTAL BALANCE SHEET INFORMATION

The composition of trade receivables, net is as follows:



	December 30, 2017			December 31, 2016
	(in thousands)
Client receivables	$	335,839		$	283,997
Unbilled revenue	96,297			82,203
Total	432,136			366,200
Less: Allowance for doubtful accounts	(2,120		)	(2,150		)
Trade receivables, net	$	430,016		$	364,050

The following amounts were recorded to the allowance for doubtful accounts in fiscal years 2017, 2016, and 2015; net provisions of $0.9 million; net recoveries of $0.5 million; and net provisions of $1.8 million, respectively.

The composition of inventories is as follows:



	December 30, 2017		December 31, 2016
	(in thousands)
Raw materials and supplies	$	19,858	$	18,893
Work in process	18,200		13,681
Finished products	76,898		63,259
Inventories	$	114,956	$	95,833

The composition of other current assets is as follows:



	December 30, 2017		December 31, 2016
	(in thousands)
Investments	$	28,489	$	3,771
Prepaid income tax	52,234		40,705
Restricted cash	592		532
Other current assets	$	81,315	$	45,008

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



	December 30, 2017			December 31, 2016
	(in thousands)
Land	$	48,989		$	47,392
Buildings ⁽¹⁾	812,230			784,129
Machinery and equipment ⁽¹⁾	450,992			403,123
Leasehold improvements	52,969			47,071
Furniture and fixtures	27,455			24,148
Computer hardware and software	140,216			127,283
Vehicles ⁽¹⁾	4,582			4,118
Construction in progress	45,518			24,703
Total	1,582,951			1,461,967
Less: Accumulated depreciation	(800,978		)	(706,140		)
Property, plant and equipment, net	$	781,973		$	755,827

⁽¹⁾ These balances include assets under capital lease. See Note 7, “Long-Term Debt and Capital Lease Obligations.”

Depreciation expense in fiscal years 2017, 2016 and 2015 was $89.8 million, $85.0 million and $70.7 million, respectively.

The composition of other assets is as follows:



	December 30, 2017		December 31, 2016
	(in thousands)
Life insurance policies	$	34,008	$	29,456
Venture capital investments	71,101		45,331
Restricted cash	1,945		1,736
Other	16,948		11,907
Other assets	$	124,002	$	88,430

The composition of other current liabilities is as follows:



	December 30, 2017		December 31, 2016
	(in thousands)
Accrued income taxes	$	43,250	$	25,621
Other	1,210		879
Other current liabilities	$	44,460	$	26,500

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



	December 30, 2017		December 31, 2016
	(in thousands)
Transition Tax (Note 9)	$	61,038	$	—
Long-term pension liability	52,364		89,984
Accrued executive supplemental life insurance retirement plan and deferred compensation plan	37,582		32,880
Other	43,831		36,375
Other long-term liabilities	$	194,815	$	159,239