Income Taxes Income Taxes - Summary of Deferred Tax Asset (Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Net operating loss carryforwards	$ 116,378	$ 82,259
Accrued liabilities	3,486	5,726
Other	12,479	9,407
Subtotal	132,343	97,392
Valuation allowances	(822)	(45,439)
Total deferred tax assets	131,521	51,953
Deferred tax liabilities:
Property, plant and equipment	(6,440)	(10,763)
Basis difference in the Partnership	(81,645)	(35,604)
Other	(8,083)	(4,172)
Total deferred tax liabilities	(96,168)	(50,539)
Net deferred tax asset	$ 35,353	$ 1,414