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SUPPLEMENTAL BALANCE SHEET INFORMATION (Details) - USD ($) $ in Thousands | Mar. 28, 2020 | Dec. 28, 2019 | Mar. 30, 2019
--- | --- | --- | ---
Composition of trade receivables |  |  |
Client receivables | $ 415,359 | $ 395,740 |
Unbilled revenue | 131,660 | 121,957 |
Total | 547,019 | 517,697 |
Less: Allowance for doubtful accounts | (4,629) | (3,664) |
Trade receivables, net | 542,390 | 514,033 |
Composition of inventories |  |  |
Raw materials and supplies | 24,708 | 24,613 |
Work in process | 30,418 | 35,852 |
Finished products | 107,812 | 100,195 |
Inventories | 162,938 | 160,660 |
Composition of other current assets |  |  |
Prepaid income tax | 60,016 | 54,358 |
Short-term investments | 934 | 941 |
Restricted cash | 444 | 431 | $ 491
Other | 300 | 300 |
Other current assets | 61,694 | 56,030 |
Composition of other assets |  |  |
Venture capital investments | 98,405 | 108,983 |
Other investments | 18,659 | 13,996 |
Life insurance policies | 31,617 | 38,207 |
Other long-term income tax assets | 20,534 | 20,570 |
Restricted cash | 1,576 | 1,601 | $ 1,499
Other | 26,288 | 29,258 |
Other assets | 197,079 | 212,615 |
Composition of other current liabilities |  |  |
Current portion of operating lease right-of-use liabilities | 22,469 | 20,357 |
Accrued income taxes | 25,706 | 26,066 |
Customer contract deposits | 37,319 | 33,080 |
Other | 23,426 | 11,095 |
Other current liabilities | 108,920 | 90,598 |
Composition of other long-term liabilities |  |  |
U.S. Transition Tax | 50,057 | 52,066 |
Long-term pension liability, accrued executive supplemental life insurance retirement plan and deferred compensation plan | 78,272 | 80,833 |
Long-term deferred revenue | 16,078 | 20,983 |
Other | 29,517 | 29,051 |
Other long-term liabilities | $ 173,924 | $ 182,933 |

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