Organization and Nature of Operations - Partnership Assets (Details)	9 Months Ended
	Sep. 30, 2020
Colorado River LLC
Equity
NBLX Ownership	100.00%
San Juan River LLC
Equity
NBLX Ownership	100.00%
Green River DevCo LLC
Equity
NBLX Ownership	100.00%
Laramie River LLC | Greeley Crescent IDP (DJ Basin)
Equity
NBLX Ownership	100.00%
Laramie River LLC | Black Diamond Dedication Area (DJ Basin)
Equity
NBLX Ownership	54.40%
Noncontrolling Interest	45.60%
Gunnison River DevCo LP
Equity
NBLX Ownership	5.00%
Noncontrolling Interest	95.00%
Blanco River LLC
Equity
NBLX Ownership	100.00%
Trinity River DevCo LLC
Equity
NBLX Ownership	100.00%
Dos Rios DevCo LLC
Equity
NBLX Ownership	100.00%
NBL Midstream Holdings LLC | East Pony IDP (DJ Basin)
Equity
NBLX Ownership	100.00%
NBL Midstream Holdings LLC | Delaware Basin
Equity
NBLX Ownership	100.00%