Other Income (Tables)

12 Months Ended

Dec. 31, 2014

Component of Operating Income [Abstract]

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

	For the Years Ended December 31,
	2014		2013		2012
Equity in earnings of affiliates	$	49,791	$	33,133	$	27,048
Rental income	45,061		3,518		3,706
Coal contract settlement	30,000		—		—
Gathering revenue	29,558		7,019		5,866
Royalty income	19,653		16,906		16,853
Right of way issuance	7,333		4,536		3,966
Interest income	2,303		15,889		28,937
Excess distribution from Equity Affiliate	1,319		—		—
Service income	1,188		3,085		3,203
PA Turnpike settlement	—		9,000		—
Business interruption insurance	—		5,445		2,300
Other	20,897		12,952		21,291
Total Other Income	$	207,103	$	111,483	$	113,170