Retirement Plans Retirement Plans (Tables)

12 Months Ended

Sep. 29, 2017

Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]

Schedule of Costs of Retirement Plans

Retirement plan expenses, which are included in cost of products, cost of services, R&D, S&M, and G&A expense in our consolidated statements of operations, were as follows (in thousands):

	Fiscal Year Ended
	September 29, 2017		September 30, 2016		September 25, 2015
Retirement plan expenses	$	22,035	$	20,471	$	19,431