Segment Reporting (Reconciliation Of Adjusted Segment EBITDA) (Details) (USD $) In Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010		Sep. 30, 2011	Sep. 30, 2010
Segment Reporting [Abstract]
Total Adjusted Segment EBITDA	$ 93,250	$ 77,084		$ 242,992	$ 244,582
Segment depreciation expense	(6,115)	(7,476)		(17,729)	(20,114)
Amortization of other intangible assets	(5,843)	(6,286)		(16,795)	(18,229)
Special Charges				(15,212)	(29,356)
Accretion of contingent consideration	(944)	(179)		(2,539)	(179)
Unallocated corporate expenses, excluding special charges	(20,926)	(16,235)		(53,474)	(49,912)
Interest income and other	486	2,527	[1]	5,409	4,740	[1]
Interest expense	(14,319)	(11,904)	[1]	(44,129)	(34,600)	[1]
Loss on early extinguishment of debt		(5,161)	[1]		(5,161)	[1]
Income before income tax provision	$ 45,589	$ 32,370	[1]	$ 98,523	$ 91,771	[1]

[1] As Revised (Note 2)