Business and Basis of Presentation (Details) $ / shares in Units, $ in Thousands			2 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
	May 07, 2019 USD ($)	Apr. 17, 2019 USD ($) $ / shares shares	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Jun. 28, 2019 $ / shares	May 31, 2019 USD ($)	Jul. 27, 2018 USD ($)	Jul. 16, 2018
Schedule of Equity Method Investments [Line Items]
Unamortized debt issuance costs written off	$ 4,000
Prepayment premium paid					$ 2,090	$ 0
Loss on extinguishment of debt	(6,900)				(6,933)	0
Capitalized issuance costs			$ 7,200		3,600		$ 3,600
Stock compensation expense					6,500
Capitalized share-based compensation expense					1,010	$ 0
Share based compensation expense				$ 6,495	$ 25,895
Number of operating segments | segment					1
Brigham LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage by subsidiary		43.30%
Percentage of voting rights owned		100.00%
Brigham Resources, LLC
Schedule of Equity Method Investments [Line Items]
Cash collateral posted for existing swap contracts									$ 1,600	$ 1,400
Brigham Resources
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage											16.50%
Class B Common Stock
Schedule of Equity Method Investments [Line Items]
Share price (in dollars per share) | $ / shares		$ 18.00
Temporary equity, share price (in dollars per share) | $ / shares								$ 21.27
Initial Public Offering
Schedule of Equity Method Investments [Line Items]
Consideration received		$ 274,900
Initial Public Offering | Class A Common Stock
Schedule of Equity Method Investments [Line Items]
Sale of stock, number of shares issued (in shares) | shares		16,675,000
Term Loan Facility
Schedule of Equity Method Investments [Line Items]
Long-term line of credit	200,000
Prepayment premium paid	2,100
Legal fees paid	$ 800
Existing Owners of Brigham Minerals
Schedule of Equity Method Investments [Line Items]
Sale of stock, ownership percentage		10.50%
Existing Owners of Brigham Minerals | Class A Common Stock
Schedule of Equity Method Investments [Line Items]
Sale of stock, ownership percentage		24.20%
Number of shares owned (in shares) | shares		5,322,198
Existing Owners of Brigham Minerals | Class B Common Stock
Schedule of Equity Method Investments [Line Items]
Sale of stock, ownership percentage		56.70%
Investors in Offering
Schedule of Equity Method Investments [Line Items]
Sale of stock, ownership percentage		32.80%
Investors in Offering | Class A Common Stock
Schedule of Equity Method Investments [Line Items]
Sale of stock, ownership percentage		75.80%