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Supplemental Balance Sheet Information (Tables)
 3 Months Ended
Mar. 31, 2020
Balance Sheet Related Disclosures [Abstract]  
Schedule of Other Accrued Liabilities
Components of "Other accrued liabilities" were as follows:
 
March 31, 2020
 
December 31, 2019
Accrued interest
$
3,538

 
$
10,761

Asset retirement obligations
—

 
25

Property and other taxes payable
2,803

 
5,411

Accrued payroll
3,944

 
3,011

Operating lease liabilities
8,358

 
7,722

Other
1,639

 
1,859

 
$
20,282

 
$
28,789
Schedule of Asset Retirement Obligations
The schedule below summarizes the changes in our asset retirement obligations:
 
March 31, 2020
 
 
Beginning asset retirement obligations
$
8,936

Additions to asset retirement obligations
379

Accretion expense
102

Liabilities settled
(510
)
Ending asset retirement obligations
8,907

Current portion of asset retirement obligations1
—

Long-term portion of asset retirement obligations2
$
8,907


1The current portion of asset retirement obligations is included in "Other accrued liabilities" on the Partnership's Consolidated and Condensed Balance Sheets.

2The non-current portion of asset retirement obligations is included in "Other long-term obligations" on the Partnership's Consolidated and Condensed Balance Sheets.