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Component: (Network and Table)
Network
2405407 - Disclosure - SUPPLEMENTAL BALANCE SHEET INFORMATION - Composition of Other Assets (Details)
(http://www.crl.com/role/SupplementalBalanceSheetInformationCompositionOfOtherAssetsDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Supplemental Balance Sheet Information [Abstract]Period [Axis]
2016-12-31
2015-12-26
Supplemental Balance Sheet Information [Abstract]
 
 
Life insurance policies
29,456,000  
27,554,000  
Venture capital investments
45,331,000  
32,730,000  
Restricted cash
1,736,000  
1,745,000  
Other
11,907,000  
9,614,000  
Other assets
88,430,000  
 
71,643,000