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Employee Benefit Plans Amounts in Accumulated Other Comprehensive Income Expected to be Recognized as Components of Net Periodic Benefit Cost in Next Year (Details) $ in Thousands	12 Months Ended
	Dec. 26, 2015 USD ($)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial loss	$ 1,931
Amortization of net prior service credit	(576)
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial loss	251
Amortization of net prior service credit	$ 0

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Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

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Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

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