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SUPPLEMENTAL BALANCE SHEET INFORMATION (Details) - USD ($) $ in Thousands | Sep. 28, 2019 | Dec. 30, 2018 | Dec. 29, 2018 | Sep. 29, 2018
--- | --- | --- | --- | ---
Composition of trade receivables |  |  |  |
Client receivables | $ 394,135 |  | $ 370,131 |
Unbilled revenue | 134,169 |  | 105,216 |
Total | 528,304 |  | 475,347 |
Less: Allowance for doubtful accounts | (4,230) |  | (3,099) |
Trade receivables, net | 524,074 |  | 472,248 |
Composition of inventories |  |  |  |
Raw materials and supplies | 23,670 |  | 22,378 |
Work in process | 36,851 |  | 21,732 |
Finished products | 95,005 |  | 83,782 |
Inventories | 155,526 |  | 127,892 |
Composition of other current assets |  |  |  |
Prepaid income tax | 75,019 |  | 47,157 |
Investments | 855 |  | 885 |
Restricted cash | 534 |  | 465 | $ 426
Other | 366 |  | 300 |
Other current assets | 76,774 |  | 48,807 |
Composition of other assets |  |  |  |
Venture capital investments | 100,553 |  | 87,545 |
Other investments | 13,045 |  | 1,046 |
Life insurance policies | 35,861 |  | 32,340 |
Restricted cash | 1,427 |  | 1,411 | $ 2,584
Other | 42,288 |  | 21,417 |
Other assets | 193,174 | $ 138,770 | 143,759 |
Composition of other current liabilities |  |  |  |
Current portion of operating lease right-of-use liabilities | 20,032 |  |  |
Accrued income taxes | 44,121 |  | 24,120 |
Customer contract deposits | 36,006 |  | 38,245 |
Other | 14,243 |  | 8,915 |
Other current liabilities | 114,402 | $ 87,215 | 71,280 |
Composition of other long-term liabilities |  |  |  |
U.S. Transition Tax | 52,066 |  | 52,064 |
Long-term pension liability | 29,028 |  | 24,671 |
Accrued executive supplemental life insurance retirement plan | 37,328 |  | 36,086 |
Long-term deferred revenue | 25,348 |  | 34,420 |
Other | 27,473 |  | 31,880 |
Other long-term liabilities | $ 171,243 |  | $ 179,121 |

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