Restructuring Programs (Details) $ in Thousands		3 Months Ended
	Jul. 31, 2015	Dec. 26, 2015 USD ($) position
Restructuring expenses recorded
Restructuring charge		$ 681
Multi-year productivity program
Restructuring Programs
Period for reduction in workforce	6 months
Cumulative reduction in workforce (in positions) | position		330
Cumulative reduction in workforce (as a percent)		5.00%
Cumulative pre-tax restructuring charges, by segment
Cumulative Expenses Incurred-to-date		$ 15,931
Remaining Estimated Expenses		2,573
Cumulative Estimated Expenses		18,504
Restructuring expenses recorded
Restructuring charge		681
Multi-year productivity program | Domestic
Cumulative pre-tax restructuring charges, by segment
Cumulative Expenses Incurred-to-date		12,533
Cumulative Estimated Expenses		12,533
Restructuring expenses recorded
Restructuring charge		537
Multi-year productivity program | Canada
Cumulative pre-tax restructuring charges, by segment
Cumulative Expenses Incurred-to-date		2,609
Remaining Estimated Expenses		2,573
Cumulative Estimated Expenses		5,182
Restructuring expenses recorded
Restructuring charge		96
Multi-year productivity program | Corporate-Unallocated
Cumulative pre-tax restructuring charges, by segment
Cumulative Expenses Incurred-to-date		789
Cumulative Estimated Expenses		789
Restructuring expenses recorded
Restructuring charge		48
Multi-year productivity program | Severance and Related Costs
Restructuring Programs
Costs that will be settled in cash		11,900
Restructuring expenses recorded
Restructuring charge		345
Multi-year productivity program | Severance and Related Costs | Domestic
Restructuring expenses recorded
Restructuring charge		297
Multi-year productivity program | Severance and Related Costs | Corporate-Unallocated
Restructuring expenses recorded
Restructuring charge		48
Multi-year productivity program | Asset Write-downs
Restructuring expenses recorded
Restructuring charge		336
Multi-year productivity program | Asset Write-downs | Domestic
Restructuring expenses recorded
Restructuring charge		240
Multi-year productivity program | Asset Write-downs | Canada
Restructuring expenses recorded
Restructuring charge		$ 96