REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands |
Dec. 28, 2019 |
Dec. 29, 2018 |
---|---|---|
Revenue from Contract with Customer [Abstract] | ||
Client receivables | $ 395,740 | $ 370,131 |
Contract assets (unbilled revenue) | 121,957 | 105,216 |
Contract liabilities (current and long-term deferred revenue) | 192,788 | 179,559 |
Contract liabilities (customer contract deposits) | $ 33,080 | $ 38,245 |