Other Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Component of Operating Income [Abstract]
Contracts Revenue	$ 30,000	$ 0	$ 30,000	$ 0
Rental Income, Nonoperating	10,697	1,111	25,605	1,884
Proceeds from Contributions from Affiliates	14,062	11,869	21,512	16,666
Gas Gathering, Transportation, Marketing and Processing Revenue	2,020	733	20,750	5,097
Royalty Revenue	4,476	4,931	9,755	8,757
Bailey Belt Settlement	4,275	0	4,275	0
Right of Way Issuance	513	25	2,413	1,708
Interest Income, Other	676	4,477	1,300	11,401
Gain on Business Interruption Insurance Recovery	0	0	0	2,700
Other Nonoperating Income	3,258	5,374	9,421	8,694
Other Income (including equity earnings)	$ 69,977	$ 28,520	$ 125,031	$ 56,907