Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2014

Asset Retirement Obligation Disclosure [Abstract]

Information Related to Asset Retirement Obligations

The following table reflects information related to our asset retirement obligations:

Balance at December 31, 2013	$	200,831
Additions to asset retirement obligations		636
Accretion expense		2,647
Liabilities settled		(1,341	)
Balance at June 30, 2014	$	202,773