Supplemental Stockholders' Equity Information - Stockholders' Equity (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2011	Sep. 26, 2010	Sep. 25, 2011	Sep. 26, 2010
Changes in stockholders' equity
Total stockholders' equity, period start			$ 664,076	$ 607,243
Net income/(loss)	15,468	(4,358)	(99,129)	41,619
Other comprehensive income (loss)	682	5,903	10,865	(1,608)
Issuance of shares			8,055	9,106
Stock-based compensation			8,815	5,835
Total stockholders' equity, period end	592,682	662,195	592,682	662,195
Parent [Member]
Changes in stockholders' equity
Total stockholders' equity, period start			659,927	604,042
Net income/(loss)			(98,614)	40,565
Other comprehensive income (loss)			10,865	(1,608)
Issuance of shares			8,055	9,106
Stock-based compensation			8,815	5,835
Total stockholders' equity, period end	589,048	657,940	589,048	657,940
Noncontrolling Interest [Member]
Changes in stockholders' equity
Total stockholders' equity, period start			4,149	3,201
Net income/(loss)			(515)	1,054
Other comprehensive income (loss)			0	0
Issuance of shares			0	0
Stock-based compensation			0	0
Total stockholders' equity, period end	$ 3,634	$ 4,255	$ 3,634	$ 4,255