Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Dec. 31, 2011
Income Taxes (Additional Textual) [Abstract]
Deferred tax assets, total	$ 367,288
Income Taxes (Textual) [Abstract]
Effective tax rate	(1.60%)	30.80%
U.S. federal statutory rate	35.00%
Net discrete tax benefits	28,500
Percentage of deferred tax assets related to net operating loss carryforwards	44.00%
Net discrete benefits percentage points of effective tax rate	32.20%
Gross unrecognized tax benefits	25,906		24,888
Net increase in gross unrecognized tax benefits	1,018
Interest and penalties on unrecognized tax benefits	5,594		4,382
Deferred tax assets, net	175,882
Australia [Member]
Income Taxes (Additional Textual) [Abstract]
Deferred tax assets, total	30,263
Net operating loss carryforwards included in deferred tax assets	$ 22,674