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Temporary Equity (Details)
$ / shares in Units, $ in Thousands
8 Months Ended 12 Months Ended
Apr. 17, 2019
USD ($)
vote
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
vote
$ / shares
shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Increase (Decrease) in Temporary Equity [Roll Forward]          
Beginning balance $ 518,000 $ 518,000      
Conversion of Class B shares to Class A shares   (104,390)      
Net income attribution   9,646 $ 9,858 $ 0 $ 0
Distribution to holders of temporary equity   (20,321)      
Adjustment of temporary equity to redemption amount   51,572      
Ending balance   $ 454,507 $ 454,507    
Class B Common Stock          
Temporary Equity [Line Items]          
Number of votes per share (vote) | vote     1    
Increase (Decrease) in Temporary Equity [Roll Forward]          
Temporary equity (in shares) | shares 28,777,802 22,847,045 22,847,045    
Temporary equity, share price (in dollars per share) | $ / shares   $ 19.89 $ 19.89    
Common Class A          
Temporary Equity [Line Items]          
Number of votes per share (vote) | vote     1    
Increase (Decrease) in Temporary Equity [Roll Forward]          
Share price (in dollars per share) | $ / shares $ 18.00        
Existing Owners of Brigham Minerals          
Temporary Equity [Line Items]          
Sale of stock, ownership percentage 10.50%        
Existing Owners of Brigham Minerals | Class B Common Stock          
Temporary Equity [Line Items]          
Sale of stock, ownership percentage 40.20%   56.70%    
Number of votes per share (vote) | vote 1        
Existing Owners of Brigham Minerals | Common Class A          
Temporary Equity [Line Items]          
Sale of stock, ownership percentage 24.20%        
Initial Public Offering | Common Class A          
Temporary Equity [Line Items]          
Sale of stock, ownership percentage 75.80%        
Increase (Decrease) in Temporary Equity [Roll Forward]          
Share price (in dollars per share) | $ / shares $ 18.00