Goodwill and Other Intangible Assets (Summary Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Gross Carrying Amount of Amortizable Intangible Assets	$ 557,549	$ 244,244
Accumulated amortization	(61,021)	(54,592)
Amortizable intangible assets, net of accumulated amortization	496,528	189,652
Trademarks	19,900	19,900
Intangible Assets, Gross, Excluding Goodwill	577,449	264,144
Total intangible assets, net	516,428	209,552
Affiliate and Customer Relationships [Member]
Gross Carrying Amount of Amortizable Intangible Assets	485,337	243,600
Accumulated amortization	(59,785)	(53,971)
Amortizable intangible assets, net of accumulated amortization	425,552	189,629
Trade Names [Member]
Gross Carrying Amount of Amortizable Intangible Assets	71,570
Accumulated amortization	(603)
Amortizable intangible assets, net of accumulated amortization	70,967
Other Amortizable Intangible Assets [Member]
Gross Carrying Amount of Amortizable Intangible Assets	642	644
Accumulated amortization	(633)	(621)
Amortizable intangible assets, net of accumulated amortization	$ 9	$ 23