General (Details) (USD $)	3 Months Ended								12 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	Dec. 29, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Jan. 01, 2011 Stock Options [Member]	Dec. 29, 2012 Non Vested Stock [Member]	Dec. 31, 2011 Non Vested Stock [Member]	Jan. 01, 2011 Non Vested Stock [Member]	Dec. 29, 2012 Griffin Transaction [Member]	Dec. 31, 2011 Griffin Transaction [Member]	Jan. 01, 2011 Griffin Transaction [Member]	Dec. 29, 2012 Trade Names [Member]	Dec. 29, 2012 Credit Agreement Term Loan [Member] Secured Debt [Member]	Dec. 31, 2011 Credit Agreement Term Loan [Member] Secured Debt [Member]	Dec. 17, 2010 Credit Agreement Term Loan [Member] Secured Debt [Member]	Dec. 29, 2012 Minimum [Member] facilities	Dec. 29, 2012 Minimum [Member] Buildings and improvements [Member]	Dec. 29, 2012 Minimum [Member] Machinery and equipment [Member]	Dec. 29, 2012 Minimum [Member] Vehicles [Member]	Dec. 29, 2012 Minimum [Member] Aircraft [Member]	Dec. 29, 2012 Minimum [Member] Routes [Member]	Dec. 29, 2012 Minimum [Member] Permits [Member]	Dec. 29, 2012 Minimum [Member] Non-compete agreements [Member]	Dec. 29, 2012 Maximum [Member] Buildings and improvements [Member]	Dec. 29, 2012 Maximum [Member] Machinery and equipment [Member]	Dec. 29, 2012 Maximum [Member] Vehicles [Member]	Dec. 29, 2012 Maximum [Member] Aircraft [Member]	Dec. 29, 2012 Maximum [Member] Routes [Member]	Dec. 29, 2012 Maximum [Member] Permits [Member]	Dec. 29, 2012 Maximum [Member] Non-compete agreements [Member]
General [Line Items]
Number of Processing and Transfer Facilities																									120
Number Of Weeks Of Contribution In Year End Results From Assets Acquired																		P52W	P52W	P2W
Accounting Policies [Abstract]
Minimum Weeks In Fiscal Year									P52W
Maximum Weeks In Fiscal Year									P53W
Number Of Weeks Year To Date									P52W	P52W	P52W
Cash and Cash Equivalents [Abstract]
Investments Classified As Cash Equivalents, Original Maturity									3 months
Long Lived Assets [Abstract]
Property, Plant and Equipment, Useful Life, Minimum																										15 years	3 years	2 years	7 years				30 years	10 years	6 years	10 years
Finite-Lived Intangible Assets, Useful Life, Minimum																					15 years									5 years	10 years	3 years					20 years	20 years	7 years
Goodwill [Abstract]
Goodwill	$ 381,369,000				$ 381,369,000				$ 381,369,000	$ 381,369,000
Basic:
Net income									130,770,000	169,418,000	44,243,000
Shares									117,592,000	114,924,000	82,854,000
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
Effect of dilutive securities: [Abstract]
Add: Option shares in the money and dilutive effect of non-vested stock									806,000	972,000	778,000
Less: Pro forma treasury shares									(309,000)	(371,000)	(389,000)
Diluted:
Net Income									130,770,000	169,418,000	44,243,000
Shares									118,089,000	115,525,000	83,243,000
Per Share	$ 0.24	$ 0.31	$ 0.31	$ 0.24	$ 0.25	$ 0.35	$ 0.44	$ 0.43	$ 1.11	$ 1.47	$ 0.53
Antidilutive Securities [Abstract]
Antidilutive securities excluded from computation of earnings per share, amount												207,890	63,272	87,843	105,486	330,268	75,714
Stock Based Compensation [Abstract]
Stock-based compensation expense									8,900,000	4,900,000	2,800,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense									3,500,000	1,900,000	1,100,000
Excess tax benefits from stock-based compensation									2,652,000	1,125,000	234,000
Financial Instruments [Abstract]
Long-term Debt	250,224,000				280,030,000				250,224,000	280,030,000												0	30,000,000	300,000,000
Long-term Debt, Fair Value	$ 287,188,000								$ 287,188,000														$ 30,900,000