Significant Customers	12 Months Ended
Dec. 27, 2020
Segment Reporting [Abstract]
Significant Customers	Significant Customers Revenue from the U.S. Government (which includes Foreign Military Sales) includes revenue from contracts for which the Company is the prime contractor as well as those for which the Company is a subcontractor and the ultimate customer is the U.S. Government. The KGS and US segments have substantial revenue from the U.S. Government. Sales to the U.S. Government amounted to approximately $546.4 million, $507.4 million, and $447.0 million or 73%, 71%, and 72%, of total revenue for the years ended December 27, 2020, December 29, 2019, and December 30, 2018, respectively.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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