Employee Benefit Plans (Tables)

6 Months Ended

May 26, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of defined benefit plans disclosures

The following table summarizes the components of net periodic benefit cost (income) and the changes recognized in “Accumulated other comprehensive loss” for the Company’s defined benefit pension plans and postretirement benefit plans:

	Pension Benefits						Postretirement Benefits
	Three Months Ended						Three Months Ended
	May 26, 2013			May 27, 2012			May 26, 2013			May 27, 2012
	(Dollars in thousands)
Net periodic benefit cost (income):
Service cost	$	2,215		$	2,247		$	94		$	100
Interest cost	12,994			14,435			1,240			1,658
Expected return on plan assets	(13,946		)	(13,108		)	—			—
Amortization of prior service benefit	(17		)	(21		)	(122		)	(4,089		)
Amortization of actuarial loss	4,213			3,161			1,692			1,289
Curtailment gain	(510		)	(222		)	—			—
Net settlement loss	584			310			—			—
Net periodic benefit cost (income)	5,533			6,802			2,904			(1,042		)
Changes in accumulated other comprehensive loss:
Actuarial loss	—			74			—			—
Amortization of prior service benefit	17			21			122			4,089
Amortization of actuarial loss	(4,213		)	(3,161		)	(1,692		)	(1,289		)
Curtailment gain	949			—			—			—
Net settlement loss	(184		)	(145		)	—			—
Total recognized in accumulated other comprehensive loss	(3,431		)	(3,211		)	(1,570		)	2,800
Total recognized in net periodic benefit cost (income) and accumulated other comprehensive loss	$	2,102		$	3,591		$	1,334		$	1,758

	Pension Benefits						Postretirement Benefits
	Six Months Ended						Six Months Ended
	May 26, 2013			May 27, 2012			May 26, 2013			May 27, 2012
	(Dollars in thousands)
Net periodic benefit cost (income):
Service cost	$	4,496		$	4,494		$	188		$	199
Interest cost	26,060			28,848			2,479			3,317
Expected return on plan assets	(27,960		)	(26,117		)	—			—
Amortization of prior service benefit	(37		)	(41		)	(244		)	(8,178		)
Amortization of actuarial loss	8,431			6,303			3,383			2,578
Curtailment gain	(510		)	(995		)	—			—
Net settlement loss	629			417			—			—
Net periodic benefit cost (income)	11,109			12,909			5,806			(2,084		)
Changes in accumulated other comprehensive loss:
Actuarial loss	—			70			—			—
Amortization of prior service benefit	37			41			244			8,178
Amortization of actuarial loss	(8,431		)	(6,303		)	(3,383		)	(2,578		)
Curtailment gain (loss)	509			(1		)	—			—
Net settlement loss	(184		)	(196		)	—			—
Total recognized in accumulated other comprehensive loss	(8,069		)	(6,389		)	(3,139		)	5,600
Total recognized in net periodic benefit cost (income) and accumulated other comprehensive loss	$	3,040		$	6,520		$	2,667		$	3,516