Supplemental Stockholders' Equity Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 23, 2012	Sep. 25, 2011	Sep. 23, 2012	Sep. 25, 2011
Changes in stockholders' equity
Total stockholders' equity, period start			$ 509,509	$ 664,076
Net income/(loss)	2,261	15,468	(43,838)	(99,129)
Other comprehensive income, net of tax	4,233	682	2,000	10,865
Effect of issuance of shares			2,093	8,055
Stock-based compensation			5,370	8,815
Total stockholders' equity, period end	475,134	592,682	475,134	592,682
Parent [Member]
Changes in stockholders' equity
Total stockholders' equity, period start			506,360	659,927
Net income/(loss)			(43,737)	(98,614)
Other comprehensive income, net of tax			2,000	10,865
Effect of issuance of shares			2,093	8,055
Stock-based compensation			5,370	8,815
Total stockholders' equity, period end	472,086	589,048	472,086	589,048
Noncontrolling Interest [Member]
Changes in stockholders' equity
Total stockholders' equity, period start			3,149	4,149
Net income/(loss)			(101)	(515)
Other comprehensive income, net of tax			0	0
Effect of issuance of shares			0	0
Stock-based compensation			0	0
Total stockholders' equity, period end	$ 3,048	$ 3,634	$ 3,048	$ 3,634