Retirement Plans (Tables)

9 Months Ended

Jun. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Components of Net Pension Expense and Periodic Benefit Costs

The following table provides the components of net periodic pension expense:

	Thirteen Weeks Ended						Thirty-Nine Weeks
	Jun 24, 2012			Jun 30, 2013			Jun 24, 2012			Jun 30, 2013
	(in thousands)
Expected return on assets	$	(1,024	)	$	(1,150	)	$	(3,071	)	$	(3,502	)
Service cost	975			1,209			2,926			3,667
Interest cost	1,092			1,130			3,275			3,359
Amortization of prior service cost	—			—			2			2
Amortization of recognized losses	528			789			1,585			2,240
Net pension expense	$	1,571		$	1,978		$	4,717		$	5,766

Actuarial Assumptions Used to Determine Net Pension Expense and Periodic Benefit Costs

Actuarial assumptions used to determine net pension expense were:
Discount rate	4.50	%	3.70	%	4.50	%	3.70	%
Rate of increase in compensation levels	3.00	%	3.00	%	3.00	%	3.00	%
Expected long-term rate of return on assets	6.50	%	6.00	%	6.50	%	6.00	%