Goodwill and Intangible Assets (Narrative) (Detail) (USD $)	3 Months Ended
	Sep. 30, 2012 Segment	Dec. 31, 2011
Goodwill And Intangible Assets [Line Items]
Number of reporting units	11
Estimated cost of capital, minimum	8.00%
Estimated cost of capital, maximum	17.00%
Estimated cost of capital, weighted	11.00%
Hypothetical decrease to fair values of each reporting unit		10.00%
Net intangible assets	$ 129,328,000	$ 146,227,000
Intangibles with indefinite useful lives	30,000,000
Estimated amortization expense for intangible assets, current year	4,300,000
Estimated amortization expense for intangible assets, year 2013	17,300,000
Estimated amortization expense for intangible assets, year 2014	14,900,000
Estimated amortization expense for intangible assets, year 2015	12,900,000
Estimated amortization expense for intangible assets, year 2016	12,000,000
Estimated amortization expense for intangible assets, year 2017 and thereafter	$ 37,900,000