Significant Accounting Policies (Intangible Assets Table) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
New Date of Annual Goodwill Impairment Test	July 1, 2013
Finite-Lived Intangible Assets, Accumulated Amortization	$ (227,883)	$ (263,305)
Finite-Lived Intangible Assets, Net	316,222
Goodwill	153,802	152,627
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	148,456	292,658
Finite-Lived Intangible Assets, Accumulated Amortization	(65,125)	(130,458)
Finite-Lived Intangible Assets, Net	83,331	162,200
Dedicated and Non Dedicated Acreage [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	395,649	395,652
Finite-Lived Intangible Assets, Accumulated Amortization	(162,758)	(132,847)
Finite-Lived Intangible Assets, Net	232,891	262,805
Total Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	544,105	688,310
Finite-Lived Intangible Assets, Accumulated Amortization	(227,883)	(263,305)
Finite-Lived Intangible Assets, Net	$ 316,222	$ 425,005