Reconciliation of Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting Information [Line Items]
Total Adjusted Segment EBITDA	$ 87,406	[1]	$ 79,780	[1]	$ 250,492	[1]	$ 237,937	[1]
Segment depreciation expense	(7,112)		(6,038)		(20,932)		(18,646)
Amortization of other intangible assets	(5,776)		(5,766)		(17,293)		(16,773)
Special Charges	(10,419)		(2,775)		(10,846)		(29,557)
Goodwill impairment charge	(83,752)				(83,752)
Unallocated corporate expenses, excluding special charges	(15,946)		(18,613)		(47,680)		(58,594)
Interest income and other	1,152		1,584		1,702		4,503
Interest expense	(12,814)		(13,208)		(38,600)		(43,607)
Income (loss) before income tax provision	$ (47,261)		$ 34,964		$ 33,091		$ 75,263

[1] Total Adjusted Segment EBITDA is the total of Adjusted Segment EBITDA for all segments.