Asset Retirement Obligations (Tables)
|9 Months Ended|
Sep. 30, 2018
|Asset Retirement Obligation Disclosure [Abstract]|
|Schedule of Asset Retirement Obligations||
The change in asset retirement obligations for the nine months ended September 30, 2018 is set forth below (in thousands):
Tabular disclosure of the carrying amount of a liability for asset retirement obligations.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef