Receivables, net (Details) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 29, 2019	[1]	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Current and long-term receivables balances
Accounts receivable	$ 196,990			$ 179,250
Unbilled accounts receivable	144,364			126,165
Long-term receivables	3,655			3,082
Total receivables	345,009			308,497
Less allowance for doubtful accounts	(2,867)	$ (2,868)		(869)	$ (3,936)	$ 0
Total receivables, net	$ 342,142			$ 307,628

[1] Beginning balance for fiscal 2020 reflects the cumulative-effect adjustment recorded in connection with the adoption of ASU 2016-13, “Measurement of Credit Losses on Financial Instruments” on the first day of fiscal 2020. For additional discussion of recently adopted accounting standards, see Note 2 in the notes to the consolidated financial statements.