Quarterly Financial Information-Unaudited Quarterly Financial Information-Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Total revenues	$ 33,614	$ 25,107	$ 24,529	$ 18,265	$ 17,591	$ 18,701	$ 16,889	$ 14,083	$ 101,515	$ 67,264	$ 40,908
Income from operations	14,362	9,115	5,034	8,707	8,732	11,716	10,564	8,219	37,218	39,231	121,214
Net income	12,346	8,464	(3,207)	4,036	7,114	8,153	9,351	8,197	$ 21,639	$ 32,815	$ 115,612
Net income attributable to shareholders	$ 5,077	$ 3,146	$ (1,856)	$ 534	$ 948	$ 891	$ 0	$ 0
Basic EPS attributable to Brigham Minerals, Inc. stockholders (in dollars per share)	$ 0.20	$ 0.14	$ (0.12)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.26	$ 0.00	$ 0.00
Diluted EPS attributable to Brigham Minerals, Inc. stockholders (in dollars per share)	$ 0.20	$ 0.14	$ (0.12)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.26	$ 0.00	$ 0.00