Property, Plant and Mine Development - Additional Information (Details)		3 Months Ended	12 Months Ended
	Mar. 21, 2018 USD ($) transload	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Property, Plant and Equipment
Depreciation expense			$ 168,600,000	$ 139,100,000
Aggregate cost of machinery and equipment under capital lease		$ 2,224,197,000	2,224,197,000	2,326,126,000
Impairment of property, plant and equipment			243,064,000	109,938,000
Gain on sale of transload facilities			(1,573,000)	5,170,000	$ (415,000)
Consideration received allocated to asset retirement obligations liabilities of transload facilities			0	2,116,000
Disposal Group, Held-for-sale, Not Discontinued Operations | Land
Property, Plant and Equipment
Impairment recognized on assets held for sale			0
Disposal Group, Held-for-sale, Not Discontinued Operations | Land | Prepaid expenses and other current assets
Property, Plant and Equipment
Assets held for sale		100,000	100,000			$ 1,300,000
Depreciation adjustment on assets held for sale			0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Land | Prepaid expenses and other current assets
Property, Plant and Equipment
Gain on sale of assets		600,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Permian, Eagle Ford, and Appalachian Basins | CIG Logistics
Property, Plant and Equipment
Number of transload facilities sold | transload	3
Total consideration received on sale of transload facilities	$ 86,100,000
Liabilities assumed by buyer on sale of transload facilities	2,200,000
Cash consideration received on sale of transload facilities	83,900,000
Gain on sale of transload facilities	5,800,000
Consideration received allocated to asset retirement obligations liabilities of transload facilities	2,100,000
Equipment note assumed the buyer on sale of transload facilities	100,000
Consideration allocated to vendor incentives in sale of transload facilities	60,300,000
Accrued contract termination costs for facilities operated by third parties on sale of transload facilities	7,900,000
Settlement credit for contract termination costs on facilities operated by third parties on sale of transload facilities							$ 2,700,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Permian, Eagle Ford, and Appalachian Basins | CIG Logistics | Accounts payables and accrued liabilities
Property, Plant and Equipment
Consideration allocated to vendor incentives in sale of transload facilities		26,600,000	26,600,000	12,500,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Permian, Eagle Ford, and Appalachian Basins | CIG Logistics | Other long-term obligations
Property, Plant and Equipment
Consideration allocated to vendor incentives in sale of transload facilities				33,800,000
Machinery and equipment
Property, Plant and Equipment
Aggregated cost of machinery under finance leases		300,000	300,000
Aggregate cost of machinery and equipment under capital lease		1,152,898,000	1,152,898,000	958,357,000
Accumulated amortization of finance lease assets		200,000	200,000
Assets held under capital leases
Property, Plant and Equipment
Aggregate cost of machinery and equipment under capital lease				500,000
Accumulated depreciation of machinery and equipment under capital lease				200,000
Mining property and mine development
Property, Plant and Equipment
Aggregate cost of machinery and equipment under capital lease		$ 794,899,000	794,899,000	995,759,000
Interest cost capitalized in property, plant and mine development			$ 2,000,000.0	$ 6,700,000
Transload facilities | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Permian, Eagle Ford, and Appalachian Basins | CIG Logistics
Property, Plant and Equipment
Consideration received allocated to fair value of transload facilities	25,800,000
Net book value of transload facilities	$ 20,000,000.0