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SUPPLEMENTAL FINANCIAL STATEMENT DATA - Contract Assets (Details) - USD ($) $ in Thousands	Dec. 27, 2024	Dec. 29, 2023
SUPPLEMENTAL FINANCIAL STATEMENT DATA
Unbilled short-term	$ 66,518	$ 79,585
Contract retentions	22,010	14,300
Contract assets	88,528	93,885
Unbilled long-term		2,849
Total contract assets	$ 88,528	$ 96,734

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