Components of Other Intangible Assets, Net (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, Gross Amount	$ 189,520	$ 189,520
Finite-lived intangible assets, Accumulated Amortization	(79,478)	(68,291)
Finite-lived intangible assets, Net Amount	110,042	121,229
Indefinite-lived intangible assets, Net Amount	93,942	93,942
Other intangible assets, Net Amount	203,984	215,171
Mailing lists, non compete agreements and other
Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, Gross Amount	47,320	47,320
Finite-lived intangible assets, Accumulated Amortization	(16,152)	(13,025)
Finite-lived intangible assets, Net Amount	31,168	34,295
Weighted average remaining useful life	11 years 11 months	12 years 2 months
Customer relationships
Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, Gross Amount	142,200	142,200
Finite-lived intangible assets, Accumulated Amortization	(63,326)	(55,266)
Finite-lived intangible assets, Net Amount	$ 78,874	$ 86,934
Weighted average remaining useful life	7 years 5 months	8 years 2 months