Other Income (Tables)

12 Months Ended

Dec. 31, 2015

Component of Operating Income [Abstract]

Schedule of Other Nonoperating Income, by Component [Table Text Block]

	For the Years Ended December 31,
	2015		2014		2013
Equity in earnings of affiliates	$	54,897	$	49,791	$	33,133
Rental income	37,996		45,061		3,518
Royalty income	15,422		19,653		16,906
Right of way issuance	13,289		7,333		4,536
Gathering revenue	12,692		29,558		7,019
Interest income	2,299		2,303		15,889
Coal contract settlement	—		30,000		—
PA Turnpike settlement	—		—		9,000
Business interruption insurance	—		—		5,445
Other	9,373		23,404		16,037
Miscellaneous Other Income	$	145,968	$	207,103	$	111,483