Equity (Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, OCI Before Reclassifications	$ (48,499)	$ (15,751)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, OCI Before Reclassifications	(42,236)	19,293
Accumulated Other Comprehensive Income (Loss), OCI Before Reclassifications	(90,735)	3,542
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Reclassifications	0	0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Reclassifications	1,234	3,017
Accumulated Other Comprehensive Income (Loss), Reclassifications	1,234	3,017
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Beginning Balance	28,503	44,057
Accumulated Other Comprehensive Income (Loss), Pension Gains/(Losses) and Prior Service (Cost)/Credit Not Yet Recognized as Components of Net Periodic Benefit Costs, Beginning Balance	(23,146)	(37,454)
Accumulated other comprehensive income (loss)	5,357	6,603
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Period Change	(48,499)	(15,751)
Other Comprehensive Income (Loss), Pension Gains/(Losses) and Prior Service (Cost)/Credit Not Yet Recognized as Components of Net Periodic Benefit Costs, Period change	(41,002)	22,310
Other Comprehensive Income (Loss), Net of Tax	(89,501)	6,559
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	105	197
Other Comprehensive Income (Loss), Pension Gains/(Losses) and Prior Service (Cost)/Credit Not Yet Recognized as Components of Net Periodic Benefit Costs, Tax	9,792	(8,002)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Ending Balance	(19,891)	28,503
Accumulated Other Comprehensive Income (Loss), Pension Gains/(Losses) and Prior Service (Cost)/Credit Not Yet Recognized as Components of Net Periodic Benefit Costs, Ending Balance	(54,356)	(23,146)
Accumulated other comprehensive income (loss)	(74,247)	5,357
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	$ 9,897	$ (7,805)