Other Income (Notes)

6 Months Ended

Jun. 30, 2014

Component of Operating Income [Abstract]

Other Income and Other Expense Disclosure [Text Block]

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Coal Contract Settlement	$	30,000	$	—	$	30,000	$	—
Rental Income	10,697		1,111		25,605		1,884
Equity in Earnings of Affiliates	14,062		11,869		21,512		16,666
Gathering Revenue	2,020		733		20,750		5,097
Royalty Income	4,476		4,931		9,755		8,757
Bailey Belt Settlement	4,275		—		4,275		—
Right of Way Issuance	513		25		2,413		1,708
Interest Income	676		4,477		1,300		11,401
Business Interruption Insurance	—		—		—		2,700
Other	3,258		5,374		9,421		8,694
Total Other Income	$	69,977	$	28,520	$	125,031	$	56,907