CORRECTION OF IMMATERIAL ERRORS (Details) - USD ($)	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
CONDENSED CONSOLIDATED BALANCE SHEETS
Common units	$ 341,969,430	$ 358,942,355	$ 313,614,300				$ 341,969,430		$ 299,821,901
Noncontrolling interest	310,744,268	343,165,767	427,617,585				$ 310,744,268		291,932,233
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Distributions to unitholders	$ (18,796,590)	(17,356,606)	(15,003,898)	$ (11,540,969)	$ (7,070,693)	$ (6,061,123)			$ (38,303,043)
Units outstanding (in units)	23,520,219						23,520,219		18,056,487
Unitholders' capital	$ 653,883,111	703,298,839	742,602,602	456,892,348		203,848,774	$ 653,883,111	$ 456,892,348	$ 592,726,797	$ 262,065,434
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net loss	(28,914,588)	(20,365,487)	(5,345,363)	(999,392)	1,378,295	(52,824,471)	(54,625,438)	(52,445,568)	(52,282,223)
Distribution and accretion on Series A preferred units	(3,469,584)			(2,840,456)			(10,408,752)	(2,840,456)	(6,310,040)
Net loss and distributions and accretion on Series A preferred units attributable to noncontrolling interests	16,146,535			141,003			33,398,555	141,003	1,855,681
Distribution on Class B units	(23,414)			(12,953)			(71,042)	(12,953)	(30,967)
Net loss attributable to common units	(16,261,051)			(3,711,798)			(31,706,677)	(55,157,974)	(56,767,549)
Non Controlling Interest
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Distributions to unitholders	(9,633,877)	(8,811,307)	(7,205,737)						(5,828,966)
Unitholders' capital	310,744,268	343,165,767	427,617,585	209,450,877			$ 310,744,268	$ 209,450,877	291,932,233
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net loss	(14,416,623)	(10,339,084)	(3,123,863)	(141,003)
Limited Partners | Common Units
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Distributions to unitholders	$ (9,162,713)	$ (8,545,299)	$ (7,798,161)	$ (11,540,969)	$ (7,070,693)	$ (6,061,123)			$ (32,474,077)
Units outstanding (in units)	23,520,219	23,094,135	19,495,403	13,886,204	16,839,462	16,834,984	23,520,219	13,886,204	18,056,487	16,509,799
Unitholders' capital	$ 341,969,430	$ 358,942,355	$ 313,614,300	$ 246,793,808	$ 198,879,415	$ 203,848,774	$ 341,969,430	$ 246,793,808	$ 299,821,901	$ 262,065,434
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net loss	$ (14,497,965)	$ (10,026,403)	$ (2,221,500)	$ (858,389)	$ 1,378,295	$ (52,824,471)
Limited Partners | Class B Common Units
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Units outstanding (in units)	23,388,258	23,814,342	27,414,342	12,953,258			23,388,258	12,953,258	19,453,258
Unitholders' capital	$ 1,169,413	$ 1,190,717	$ 1,370,717	$ 647,663			$ 1,169,413	$ 647,663	$ 972,663
Classification of distributions made to holders of OpCo Common Units | As Reported
CONDENSED CONSOLIDATED BALANCE SHEETS
Common units		337,096,345	300,579,597						293,992,935
Noncontrolling interest		365,011,777	440,652,288						297,761,199
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Distributions to unitholders		(17,356,606)	(15,003,898)						(38,303,043)
Unitholders' capital		703,298,839	742,602,602						592,726,797
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net loss				(999,392)				(52,445,568)	(52,282,223)
Distribution and accretion on Series A preferred units				(2,840,456)				(2,840,456)	(6,310,040)
Net loss				(3,839,848)				(55,286,024)	(58,592,263)
Net loss and distributions and accretion on Series A preferred units attributable to noncontrolling interests				(141,003)				(141,003)	(1,855,681)
Net (loss) income attributable to Kimbell Royalty Partners LP				(3,698,845)				(55,145,021)	(56,736,582)
Distribution on Class B units				(12,953)				(12,953)	(30,967)
Net loss attributable to common units				$ (3,711,798)				$ (55,157,974)	(56,767,549)
Classification of distributions made to holders of OpCo Common Units | As Reported | Non Controlling Interest
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Unitholders' capital		365,011,777	440,652,288						297,761,199
Classification of distributions made to holders of OpCo Common Units | As Reported | Limited Partners | Common Units
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Distributions to unitholders		$ (17,356,606)	$ (15,003,898)						$ (38,303,043)
Units outstanding (in units)		23,094,135	19,495,403						18,056,487
Unitholders' capital		$ 337,096,345	$ 300,579,597						$ 293,992,935
Classification of distributions made to holders of OpCo Common Units | As Reported | Limited Partners | Class B Common Units
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Units outstanding (in units)		23,814,342	27,414,342						19,453,258
Unitholders' capital		$ 1,190,717	$ 1,370,717						$ 972,663
Classification of distributions made to holders of OpCo Common Units | Adjustments
CONDENSED CONSOLIDATED BALANCE SHEETS
Common units		21,846,010	13,034,703						5,828,966
Noncontrolling interest		(21,846,010)	(13,034,703)						(5,828,966)
Classification of distributions made to holders of OpCo Common Units | Adjustments | Non Controlling Interest
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Distributions to unitholders		(8,811,307)	(7,205,737)						(5,828,966)
Classification of distributions made to holders of OpCo Common Units | Adjustments | Limited Partners | Common Units
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN UNITHOLDERS' EQUITY
Distributions to unitholders		$ 8,811,307	$ 7,205,737						$ 5,828,966