Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Net income attributable to Matador Resources Company shareholders — numerator	$ 87,777	$ 274,207	$ 125,867
Weighted average common shares outstanding — denominator
Basic (in shares)	116,555	113,580	102,029
Dilutive effect of options and restricted stock units (in shares)	508	111	514
Diluted weighted average common shares outstanding (in shares)	117,063	113,691	102,543
Earnings per common share attributable to Matador Resources Company shareholders
Basic (usd per share)	$ 0.75	$ 2.41	$ 1.23
Diluted (usd per share)	$ 0.75	$ 2.41	$ 1.23