Rendering

Component: (Network and Table)
Network
41213 - Disclosure - Income Taxes Summary - Reconciliation of Uncertain Tax Positions (Details)
(http://www.ch2m.com/role/DisclosureIncomeTaxesSummaryReconciliationOfUncertainTaxPositionsDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000777491 (http://www.sec.gov/CIK)
Income TaxesPeriod [Axis]
2015-12-26 - 2016-12-30
2015-01-01 - 2015-12-25
Income Taxes
 
 
Reconciliation of the beginning and ending amount of uncertain tax positions
 
 
Beginning balance
59,242,000  
48,561,000  
Additions for current year tax positions
23,888,000  
30,363,000  
Additions for prior year tax positions
8,248,000  
2,797,000  
Reductions for prior year tax positions
(12,111,000) 
(1,131,000) 
Reductions as a result of settlement with taxing authority
(2,136,000) 
(19,862,000) 
Reductions as a result of lapse of applicable statue of expirations
(283,000) 
(1,486,000) 
Ending balance
76,848,000  
 
59,242,000