Other Income (Tables)

12 Months Ended

Dec. 31, 2011

Component of Other Income, Nonoperating [Line Items]

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

	For the Years Ended December 31,
	2011		2010		2009
Gain on disposition of assets	$	46,497	$	9,908	$	15,121
Equity in earnings of affiliates	24,663		21,428		15,707
Royalty income	18,491		14,688		17,249
Right-of-way issuance	13,519		122		31
Service income	9,059		9,796		11,796
Interest income	8,919		7,642		5,052
Contract settlement	—		—		12,450
Other	32,472		33,923		35,780
Total Other Income	$	153,620	$	97,507	$	113,186