Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified													9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Customer And Vendor Agreements [Member]	Dec. 31, 2011 Customer And Vendor Agreements [Member]	Sep. 30, 2012 Trade Names And Trademarks-Indefinite Lived [Member]	Dec. 31, 2011 Trade Names And Trademarks-Indefinite Lived [Member]	Sep. 30, 2012 Trade Names And Trademarks-Other [Member]	Dec. 31, 2011 Trade Names And Trademarks-Other [Member]	Sep. 30, 2012 Software [Member]	Dec. 31, 2011 Software [Member]	Sep. 30, 2012 Non-compete [Member]	Dec. 31, 2011 Non-compete [Member]	Sep. 30, 2012 Minimum [Member] Customer And Vendor Agreements [Member]	Sep. 30, 2012 Minimum [Member] Trade Names And Trademarks-Other [Member]	Sep. 30, 2012 Minimum [Member] Software [Member]	Sep. 30, 2012 Minimum [Member] Non-compete [Member]	Sep. 30, 2012 Maximum [Member] Customer And Vendor Agreements [Member]	Sep. 30, 2012 Maximum [Member] Trade Names And Trademarks-Other [Member]	Sep. 30, 2012 Maximum [Member] Software [Member]	Sep. 30, 2012 Maximum [Member] Non-compete [Member]
Goodwill And Other Intangible Asset [Line Items]
Gross Carrying Amounts	$ 555,994	$ 452,773	$ 485,607	$ 404,586	$ 51,726	$ 37,026	$ 3,160	$ 3,160	$ 12,230	$ 5,530	$ 3,271	$ 2,471
Accumulated Amortization	(90,209)	(67,166)	(82,655)	(61,110)			(1,365)	(1,200)	(4,359)	(3,383)	(1,830)	(1,473)
Net Carrying Amount	$ 465,785	$ 385,607	$ 402,952	$ 343,476	$ 51,726	$ 37,026	$ 1,795	$ 1,960	$ 7,871	$ 2,147	$ 1,441	$ 998
Useful Lives (Years)													5 years	3 years	3 years	2 years	20 years	15 years	10 years	6 years