Shareholders' Equity - Schedule of Earnings per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Basic net income attributable to Brigham Minerals, Inc. shareholders	$ 4,706	$ 534
Basic net income attributable to Brigham Minerals, Inc. shareholders		$ 0
Denominator:
Basic weighted average shares outstanding (in shares)	33,979	0
Basic EPS attributable to Brigham Minerals, Inc. stockholders (in dollars per share)	$ 0.14	$ 0
Numerator:
Diluted net income attributable to Brigham Minerals, Inc. shareholders	$ 4,706	$ 0
Denominator:
Basic weighted average shares outstanding (in shares)	33,979	0
RSAs, RSUs, Incentive Units, and shares of Class B common stock	0	0
Diluted weighted average shares outstanding (in shares)	33,979	0
Diluted EPS attributable to Brigham Minerals, Inc. stockholders (in dollars per share)	$ 0.14	$ 0