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Accrued Closure Costs and ARO | 12 Months Ended
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Dec. 31, 2018
Asset Retirement Obligation Disclosure [Abstract] |
Accrued Closure Costs and ARO | NOTE 13 ACCRUED CLOSURE COSTS AND ARO Accrued closure costs represent our estimated environmental liability to clean up our fixed-based regulated facilities as required by our permits, in the event of closure. Changes to reported closure liabilities (current and long-term) for the years ended December 31, 2018 and 2017, were as follows:
Amounts in thousands |  |  |
Balance as of December 31, 2016 |  | $ | 7,315 |
Accretion expense |  |  | 460 |
Spending |  |  | (2,037 | )
Adjustment to closure liability |  |  | 2,657 |
Balance as of December 31, 2017 |  |  | 8,395 |
Accretion expense |  |  | 325 |
Spending |  |  | (5,293 | )
Adjustment to closure liability |  |  | 3,323 |
Balance as of December 31, 2018 |  | $ | 6,750 |
The Company recorded an additional $3,323,000 and $1,400,000 in closure liabilities in 2018 and 2017, respectively, due to changes in estimated future closure costs for our M&EC subsidiary which is in closure status (see “Note 4 – M&EC Facility” for further information of these additional closure liabilities recorded). The Company also recorded an additional $1,257,000 in closure liabilities in 2017 for its DSSI subsidiary due to changes in estimated future closure costs. In 2018 and 2017, the Company had spending of approximately $4,991,000 and $1,872,000, respectively, in closure related activities for the M&EC subsidiary. In 2018 and 2017, the Company had spending of approximately $302,000 and $165,000, respectively, in closure related activities for the PFNWR subsidiary in connection with the closure of certain processing equipment/enclosure. At December 31, 2018 and 2017, M&EC’s closure liabilities totaled approximately $1,142,000 and $2,791,000, respectively, with the entire amount classified as current. The reported closure asset or ARO, is reported as a component of “Net Property and equipment” in the Consolidated Balance Sheets at December 31, 2018 and 2017 with the following activity for the years ended December 31, 2018 and 2017:
Amounts in thousands |  |  |
Balance as of December 31, 2016 |  | $ | 4,148 |
Amortization of closure and post-closure asset |  |  | (1,071 | )
Impairment of closure and post-closure asset |  |  | (413 | )
Adjustment to closure and post-closure asset |  |  | 1,257 |
Balance as of December 31, 2017 |  |  | 3,921 |
Amortization of closure and post-closure asset |  |  | (191 | )
Balance as of December 31, 2018 |  | $ | 3,730 |
The impairment of ARO for 2017 resulted from the impairment of M&EC’s remaining tangible assets recorded in 2017 (See “Note 4 – M&EC Facility”). The adjustment made to ARO for 2017 was due to the increase in closure liabilities recorded for the DSSI subsidiary as discussed above.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2175671 + Details
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