Goodwill and Other Intangible Assets (Summary Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Gross Carrying Amount of Amortizable Intangible Assets	$ 553,027	$ 244,244
Accumulated amortization	(75,604)	(54,592)
Amortizable intangible assets, net of accumulated amortization	477,423	189,652
Trademarks	19,900	19,900
Intangible Assets, Gross, Excluding Goodwill	572,927	264,144
Total intangible assets, net	497,323	209,552
Affiliate and Customer Relationships [Member]
Gross Carrying Amount of Amortizable Intangible Assets	496,045	243,600
Accumulated amortization	(73,148)	(53,971)
Amortizable intangible assets, net of accumulated amortization	422,897	189,629
Trade Names [Member]
Gross Carrying Amount of Amortizable Intangible Assets	56,338
Accumulated amortization	(1,821)
Amortizable intangible assets, net of accumulated amortization	54,517
Other Amortizable Intangible Assets [Member]
Gross Carrying Amount of Amortizable Intangible Assets	644	644
Accumulated amortization	(635)	(621)
Amortizable intangible assets, net of accumulated amortization	$ 9	$ 23