Earnings Per Share (Reconciliation Of The Numerators And The Denominators Of The Basic And Diluted Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Earnings Per Share [Abstract]
Income available to common shareholders, Earnings (Numerator)	$ 97,829	$ 72,044	$ 186,537	$ 136,600
Income available to common shareholders including assumed conversions, Earnings (Numerator)	$ 97,829	$ 72,044	$ 186,537	$ 136,600
Income available to common shareholders, Shares (Denominator)	170,713	168,299	170,336	167,706
Stock options and non-vested shares, Shares (Denominator)	4,921	5,292	4,997	5,422
Income available to common stockholders including assumed conversions, Shares (Denominator)	175,634	173,591	175,333	173,128
Basic earnings per share	$ 0.57	$ 0.43	$ 1.10	$ 0.81
Diluted earnings per share	$ 0.56	$ 0.42	$ 1.06	$ 0.79