Goodwill and Identifiable Intangible Assets (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Identifiable Intangible Assets
Gross Carrying Amount	$ 226,502,000	$ 155,142,000
Accumulated Amortization	73,236,000	55,109,000
Net	153,266,000	100,033,000
Total intangible assets, Gross carrying value	245,509,000	162,729,000
Total intangible assets, Net carrying value	172,273,000	107,620,000
Intangible amortization expense	18,100,000	25,000,000	9,800,000
Future estimated amortization of identifiable intangible assets
2013	22,170,000
2014	20,128,000
2015	17,559,000
2016	14,718,000
2017	12,749,000
Thereafter	65,942,000
Net	153,266,000	100,033,000
Trademark/trade name rights
Identifiable Intangible Assets
Indefinite lived Intangible Assets	19,007,000	7,587,000
Customer relationships
Identifiable Intangible Assets
Gross Carrying Amount	173,376,000	121,102,000
Accumulated Amortization	61,562,000	47,009,000
Net	111,814,000	74,093,000
Future estimated amortization of identifiable intangible assets
Net	111,814,000	74,093,000
Supplier agreements
Identifiable Intangible Assets
Gross Carrying Amount	33,248,000	24,788,000
Accumulated Amortization	5,531,000	3,562,000
Net	27,717,000	21,226,000
Future estimated amortization of identifiable intangible assets
Net	27,717,000	21,226,000
Other identifiable intangible assets
Identifiable Intangible Assets
Gross Carrying Amount	19,878,000	9,252,000
Accumulated Amortization	6,143,000	4,538,000
Net	13,735,000	4,714,000
Future estimated amortization of identifiable intangible assets
Net	$ 13,735,000	$ 4,714,000