Basis of Presentation and Summary of Significant Accounting Policies (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Weighted average shares used to calculate basic and diluted net income per share
Weighted average shares outstanding	144,220	130,583	143,996	129,365
Effect of potentially dilutive common shares from:
Convertible senior notes	2,194	4,410	2,185	4,964
Equity awards	2,555	4,160	2,645	4,488
Warrants		9,968		11,053
Weighted average shares used in calculation of diluted net income per share	148,969	149,121	148,826	149,870
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	4	157	3	141