Other Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Component of Operating Income [Abstract]
Contracts Revenue	$ 0	$ 0	$ 30,000	$ 0
Rental Income, Nonoperating	9,731	770	35,336	2,654
Proceeds from Contributions from Affiliates	18,284	3,610	39,796	20,276
Gas Gathering, Transportation, Marketing and Processing Revenue	3,636	766	24,386	5,863
Royalty Revenue	5,003	4,113	14,758	12,870
Bailey Belt Settlement	0	0	4,275	0
Right of Way Issuance	2,485	2,102	4,898	3,810
Interest Income, Other	527	4,300	1,827	15,701
Gain on Business Interruption Insurance Recovery	0	2,745	0	5,445
Other Nonoperating Income	1,118	2,416	10,539	11,110
Other Income (including equity earnings)	$ 40,784	$ 20,822	$ 165,815	$ 77,729