Condensed Consolidated and Combined Statement of Changes in Shareholders' and Members' Equity - USD ($) $ in Thousands	Total	Shareholders’ Contributed Capital	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Class A Common Stock	Class A Common Stock Common Stock	Class B Common Stock	Class B Common Stock Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 8,197				$ 8,197
Beginning balance at Dec. 31, 2017	302,174	$ 166,030		$ 682	135,462
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributions	21,625	21,625
Distributions	(4,246)	(4,246)
Other comprehensive income	(682)			(682)
Net income	8,197				8,197
Ending balance at Mar. 31, 2018	327,068	183,409		0	143,659
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	(17,548)
Net income	17,548
Beginning balance at Dec. 31, 2017	302,174	166,030		682	135,462
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	(682)
Net income | Predecessor	(17,548)
Net income	17,548
Ending balance at Jun. 30, 2018	360,805	207,795		0	153,010
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	(9,351)
Net income	9,351				9,351
Beginning balance at Mar. 31, 2018	327,068	183,409		0	143,659
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributions	24,386	24,386
Other comprehensive income	0
Net income | Predecessor	(9,351)
Net income	9,351				9,351
Ending balance at Jun. 30, 2018	360,805	207,795		$ 0	153,010
Beginning balance at Dec. 31, 2018	373,948	208,728	$ (3,057)		168,277
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	3,502				3,502
Net income	534				534
Ending balance at Mar. 31, 2019	377,984	208,728	(3,057)		172,313		$ 0		$ 0
Ending balance (in shares) at Mar. 31, 2019							0		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	3,502				3,502
Net income	534				534
Beginning balance at Dec. 31, 2018	373,948	208,728	(3,057)		168,277
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	(5,092)
Net income	829
Ending balance at Jun. 30, 2019	58,456	0	57,719		517		$ 220		$ 0
Ending balance (in shares) at Jun. 30, 2019						21,997,198	21,997,000	28,777,802	28,778,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	0
Net income | Predecessor	(5,092)
Net income	829
Beginning balance at Mar. 31, 2019	377,984	208,728	(3,057)		172,313		$ 0		$ 0
Beginning balance (in shares) at Mar. 31, 2019							0		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	1,590				1,590
Net income	314				314
Ending balance at Apr. 16, 2019	379,888	208,728	(3,057)		174,217		$ 0		$ 0
Ending balance (in shares) at Apr. 16, 2019							0		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	1,590				1,590
Net income	314				314
Beginning balance at Mar. 31, 2019	377,984	208,728	(3,057)		172,313		$ 0		$ 0
Beginning balance (in shares) at Mar. 31, 2019							0		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income | Predecessor	(1,590)
Net income	(3,207)
Ending balance at Jun. 30, 2019	58,456	0	57,719		517		$ 220		$ 0
Ending balance (in shares) at Jun. 30, 2019						21,997,198	21,997,000	28,777,802	28,778,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income	0
Net income | Predecessor	(1,590)
Net income	(3,207)
Beginning balance at Apr. 16, 2019	379,888	208,728	(3,057)		174,217		$ 0		$ 0
Beginning balance (in shares) at Apr. 16, 2019							0		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(2,170)				(2,170)
Exchange of Units of Brigham Minerals Holdings, LLC for Class A Common Stock and Class B Common Stock	0	(208,728)	380,205		(171,530)		$ 53
Exchange of Units of Brigham Minerals Holdings, LLC for Class A Common Stock and Class B Common Stock (in shares)							5,322,000		28,778,000
Issuance of common stock in IPO, net of offering cost (in shares)							16,675,000
Issuance of common stock in IPO, net of offering cost	274,913		274,746				$ 167
Deferred tax asset arising from the IPO	13,664		13,664
Reclassification of non-controlling interests to temporary equity	(518,000)		(518,000)
Share-based compensation expense	7,505		7,505
Adjustment of temporary equity to redemption amount	(97,344)		(97,344)
Ending balance at Jun. 30, 2019	58,456	$ 0	$ 57,719		517		$ 220		$ 0
Ending balance (in shares) at Jun. 30, 2019						21,997,198	21,997,000	28,777,802	28,778,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ (2,170)				$ (2,170)