Components of Working Capital - Accrued Liabilities Table (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accrued interest expense	$ 56,240	$ 70,968
Short-term asset retirement obligations	26,996	25,938
Short-term remediation and reclamation obligations	863	863
Income taxes payable	913	384
Contract liabilities	6,631	16,235
Other	177,751	14,760
Total accrued liabilities	269,394	129,148	[1]
WES Operating [Member]
Accrued interest expense	56,240	70,959
Short-term asset retirement obligations	26,996	25,938
Short-term remediation and reclamation obligations	863	863
Income taxes payable	913	384
Contract liabilities	6,631	16,235
Other	177,590	13,495
Total accrued liabilities	$ 269,233	$ 127,874	[1]

[1] Financial information has been recast to include the financial position and results attributable to AMA. See Note 1 and Note 3.