Supplemental Stockholders' Equity Information - Reclassifications out of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 29, 2014		Jun. 30, 2013	Jun. 29, 2014		Jun. 30, 2013
Reclassification out of accumulated other comprehensive income (loss):
Income from continuing operations	$ 9,060		$ 17,362	$ 11,907		$ 23,470
Income tax expense	(5,743)		13,813	(1,979)		18,895
Funded Status of Benefit Plans [Member] | Reclassification out of accumulated other comprehensive income (loss) [Member]
Reclassification out of accumulated other comprehensive income (loss):
Amortization of prior service credit	(2,084)	[1]		(4,170)	[1]
Amortization of actuarial loss	8,928	[1]		17,764	[1]
Income from continuing operations	6,844	[2]		13,594	[2]
Income tax expense	2,440			5,141
Total reclassification, net of tax	$ 4,404			$ 8,453

[1] These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost for pension and other postretirement benefits. See Note 9 for additional information.

[2] There were no reclassifications relating to noncontrolling interest for the quarter ended June 29, 2014.