Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Description Of Business And Basis Of Presentation Disclosure [Abstract]

Changes in allowances

	2011		2010		2009
Balance as of January 1	$	22,505	$	28,520	$	11,482
Current year increases		17,008		16,219		26,771
Write-offs, net of recoveries and other		(15,101)		(22,234)		(9,733)
Balance as of December 31	$	24,412	$	22,505	$	28,520