Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 29, 2013	$ 513,771	$ 147	$ 479,127	$ 34,497
Beginning Balance, Shares at Dec. 29, 2013		147,616,560
Net income	107,692			107,692
Issuance of shares under option plans	11,312	$ 5	11,307
Issuance of shares under option plans, Shares		4,216,774
Excess income tax benefit for exercise of options	47,261		47,261
Tax effect of forfeiture of vested options in equity	(2)		(2)
Equity-based compensation	5,355		5,355
Ending Balance at Dec. 28, 2014	685,389	$ 152	543,048	142,189
Ending Balance, Shares at Dec. 28, 2014		151,833,334
Net income	68,789			68,789
Issuance of shares under option plans	5,974	$ 2	5,972
Issuance of shares under option plans, Shares		1,732,475
Excess income tax benefit for exercise of options	19,288		19,288
Equity-based compensation	2,434		2,434
Ending Balance at Jun. 28, 2015	$ 781,874	$ 154	$ 570,742	$ 210,978
Ending Balance, Shares at Jun. 28, 2015		153,565,809