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Quarterly Financial Information (Unaudited Supplemental Quarterly Financial Information) (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended 3 Months Ended
Mar. 28, 2014
Dec. 27, 2013
Jan. 02, 2015
Dec. 27, 2013
Dec. 28, 2012
Jan. 02, 2015
Sep. 26, 2014
Jun. 27, 2014
Quarterly Financial Information [Line Items]                
Total share based compensation     $ 6,370us-gaap_ShareBasedCompensation $ 6,119us-gaap_ShareBasedCompensation $ 5,522us-gaap_ShareBasedCompensation      
Restructuring costs 3,600us-gaap_RestructuringCosts   3,604us-gaap_RestructuringCosts   (211)us-gaap_RestructuringCosts      
Bargain purchase gain     3,015us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount          
Release of deferred income tax valuation allowance   6,700us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 1,949us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 5,705us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance (1,191)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance      
Cost of Sales [Member]                
Quarterly Financial Information [Line Items]                
Total share based compensation 686us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
  3,556us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
3,284us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
2,990us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
1,029us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
842us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
999us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
Selling General and Administrative [Member]                
Quarterly Financial Information [Line Items]                
Total share based compensation $ 653us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
  $ 2,814us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 2,835us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 2,524us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 656us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 814us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
$ 691us-gaap_ShareBasedCompensation
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember