Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified													6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Customer And Vendor Agreements [Member]	Dec. 31, 2011 Customer And Vendor Agreements [Member]	Jun. 30, 2012 Trade Names And Trademarks-Indefinite Lived [Member]	Dec. 31, 2011 Trade Names And Trademarks-Indefinite Lived [Member]	Jun. 30, 2012 Trade Names And Trademarks-Other [Member]	Dec. 31, 2011 Trade Names And Trademarks-Other [Member]	Jun. 30, 2012 Software [Member]	Dec. 31, 2011 Software [Member]	Jun. 30, 2012 Noncompete Agreements [Member]	Dec. 31, 2011 Noncompete Agreements [Member]	Jun. 30, 2012 Minimum [Member] Customer And Vendor Agreements [Member]	Jun. 30, 2012 Minimum [Member] Trade Names And Trademarks-Indefinite Lived [Member]	Jun. 30, 2012 Minimum [Member] Trade Names And Trademarks-Other [Member]	Jun. 30, 2012 Minimum [Member] Software [Member]	Jun. 30, 2012 Minimum [Member] Noncompete Agreements [Member]	Jun. 30, 2012 Maximum [Member] Customer And Vendor Agreements [Member]	Jun. 30, 2012 Maximum [Member] Trade Names And Trademarks-Indefinite Lived [Member]	Jun. 30, 2012 Maximum [Member] Trade Names And Trademarks-Other [Member]	Jun. 30, 2012 Maximum [Member] Software [Member]	Jun. 30, 2012 Maximum [Member] Noncompete Agreements [Member]
Goodwill And Other Intangible Asset [Line Items]
Gross Carrying Amounts	$ 490,254	$ 447,073	$ 441,567	$ 398,386	$ 37,526	$ 37,526	$ 3,160	$ 3,160	$ 5,530	$ 5,530	$ 2,471	$ 2,471
Accumulated Amortization	(81,523)	(67,166)	(74,694)	(61,110)			(1,310)	(1,200)	(3,853)	(3,383)	(1,666)	(1,473)
Net Carrying Amount	$ 408,731	$ 379,907	$ 366,873	$ 337,276	$ 37,526	$ 37,526	$ 1,850	$ 1,960	$ 1,677	$ 2,147	$ 805	$ 998
Useful Lives (Years)													5 years	0 years	3 years	3 years	2 years	20 years	0 years	15 years	10 years	5 years