Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Quarterly Financial Data [Abstract]
Net sales	$ 424,915	$ 452,732	$ 436,674	$ 387,108	$ 430,866	$ 455,875	$ 470,610	$ 439,898	$ 1,701,429	$ 1,797,249	$ 724,909
Operating income	49,487	65,776	63,968	52,510	58,999	74,553	92,259	88,173	231,741	313,984	82,462
Income from operations before income taxes	44,908	59,307	57,829	44,741	50,328	66,141	82,486	73,339	206,785	272,294	70,343
Net income	$ 28,802	$ 37,172	$ 36,225	$ 28,571	$ 29,497	$ 41,132	$ 52,227	$ 46,562	$ 130,770	$ 169,418	$ 44,243
Basic earnings per share	$ 0.24	$ 0.32	$ 0.31	$ 0.24	$ 0.25	$ 0.35	$ 0.45	$ 0.43	$ 1.11	$ 1.47	$ 0.53
Diluted (in dollars per share)	$ 0.24	$ 0.31	$ 0.31	$ 0.24	$ 0.25	$ 0.35	$ 0.44	$ 0.43	$ 1.11	$ 1.47	$ 0.53