Asset Retirement Obligation (Tables)
|3 Months Ended|
Mar. 31, 2018
|Asset Retirement Obligation Disclosure [Abstract]|
|Schedule of Changes in Asset Retirement Obligation||
The following table provides a reconciliation of the changes in the estimated present value of asset retirement obligations for the three months ended March 31, 2018 and December 31, 2017.
Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef