Goodwill and Other Intangible Assets - (Changes in Other Intangible Assets) (Details) (USD $)					3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Non-amortized trade names	Dec. 31, 2011 Non-amortized trade names	Dec. 31, 2011 Amortized customer bases	Jun. 30, 2012 Amortized customer bases	Dec. 31, 2011 Amortized non-compete agreements	Jun. 30, 2012 Amortized non-compete agreements	Jun. 30, 2012 Other intangible assets	Jul. 02, 2011 Other intangible assets	Jun. 30, 2012 Other intangible assets	Jul. 02, 2011 Other intangible assets
Intangible Assets, Excluding Goodwill [Line Items]
Amortized Intangible Assets, Average Amortization Period					13 years	13 years	3 years	3 years
Finite-Lived Intangible Assets, Net
Amortized Intangible Assets, Cost	$ 330,351,000	$ 330,090,000			$ 330,080,000	$ 330,341,000	$ 10,000	$ 10,000
Amortized Intangible Assets, Accumulated Amortization	44,591,000	31,500,000			31,498,000	44,587,000	2,000	4,000
Amortized Intangible Assets, Net Carrying Value	285,760,000	298,590,000			298,582,000	285,754,000	8,000	6,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Non-amortized Intangible Assets, Cost			323,935,000	323,510,000
Intangible Assets, Net (Excluding Goodwill)
Amortized and Non-amortized Intangible Assets, Cost (Excluding Goodwill)	654,286,000	653,600,000
Amortized and Non-amortized Intangible Assets, Net (Excluding Goodwill)	609,695,000	622,100,000
Amortization of Intangible Assets									$ 6,500,000	$ 6,600,000	$ 13,100,000	$ 13,200,000