Goodwill and Intangible Assets (Narrative) (Detail) (USD $)	3 Months Ended	9 Months Ended
	Dec. 31, 2013	Sep. 30, 2014 Segment
Goodwill And Intangible Assets [Line Items]
Number of reporting units		8
Estimated cost of capital, minimum	10.00%
Estimated cost of capital, maximum	13.00%
Estimated cost of capital, weighted	11.00%
Hypothetical decrease to fair values of each reporting unit	10.00%
Net intangible assets	$ 408,923,000	$ 371,567,000
Intangibles with indefinite useful lives		29,500,000
Estimated amortization expense for intangible assets, current year		11,100,000
Estimated amortization expense for intangible assets, year 2015		38,400,000
Estimated amortization expense for intangible assets, year 2016		37,200,000
Estimated amortization expense for intangible assets, year 2017		36,300,000
Estimated amortization expense for intangible assets, year 2018		33,500,000
Estimated amortization expense for intangible assets, year 2019 and thereafter		$ 185,600,000