Other Information (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Other Current Assets:
Natural gas and NGLs inventory	$ 39,400,000	$ 41,300,000
Secured term loan receivable from contract restructuring, net of discount of $0.8 and $1.1	23,200,000	19,400,000
Secured term loan receivable, discount	800,000	1,100,000
Prepaid expenses and other	10,800,000	13,500,000
Natural gas and NGLs inventory, prepaid expenses, and other	73,400,000	74,200,000
Other Current Liabilities:
Accrued interest	65,300,000	37,500,000
Accrued wages and benefits, including taxes	16,900,000	37,200,000
Accrued ad valorem taxes	13,100,000	28,100,000
Capital expenditure accruals	59,900,000	50,600,000
Onerous performance obligations	4,500,000	9,000,000
Short-term lease liability	18,100,000	1,500,000
Suspense producer payments	18,400,000	34,600,000
Other	34,400,000	49,700,000
Other current liabilities	$ 230,600,000	$ 248,200,000