| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| CASH FLOWS FROM OPERATING ACTIVITIES | | | | | | | | |
| Net income | 17.8 | 28.9 | | 43.3 | 8.4 | 30.7 | 7.5 | 3.7 |
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| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation and depletion expense | 19.7 | 17.6 | | 11.3 | 10.8 | 11.7 | 8.8 | 8.3 |
| Amortization of right-of-use assets | 0.2 | | | 0.2 | | | | |
| Amortization of loan origination costs | 0.5 | 0.5 | | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 |
| Loss on extinguishment of debt | 0.5 | | | | | | | |
| Equity income in affiliate | | | | -3.4 | -0.2 | -0.4 | -0.3 | -0.3 |
| Cash distribution from affiliate | | | | 3.4 | 0.4 | 0.4 | 0.2 | 0.3 |
| Forfeiture of restricted units | | | | 0.0 | | | | |
| Unit-based compensation | 3.3 | 3.2 | | 2.9 | 2.2 | 2.4 | 2.8 | 2.7 |
| (Gain) loss on derivative instruments, net of settlements | -2.6 | -12.5 | | -6.6 | 18.7 | -14.6 | 11.3 | 11.0 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Oil, natural gas and NGL receivables | -9.1 | 11.1 | | -12.0 | -6.4 | -4.5 | -7.0 | 1.0 |
| Accounts receivable and other current assets | -0.1 | 0.5 | | 0.2 | 0.7 | -1.6 | 0.1 | 0.0 |
| Accounts payable | 0.5 | -0.3 | | -0.3 | 1.1 | -0.2 | 0.0 | 0.0 |
| Other current liabilities | 3.2 | 0.3 | | 1.4 | 0.5 | -2.0 | 1.4 | 1.2 |
| Operating lease liabilities | -0.1 | -0.1 | | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Interest earned on marketable securities in trust account | | | | | | | | |
| Other assets and liabilities | | | | | | | | |
| Net cash provided by operating activities | 31.5 | 47.1 | | 40.4 | 36.0 | 22.4 | 25.1 | 28.5 |
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| CASH FLOWS FROM INVESTING ACTIVITIES | | | | | | | | |
| Purchases of property and equipment | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 | -0.3 |
| Purchase of oil and natural gas properties | -43.9 | -0.3 | | 0.0 | -0.4 | -54.8 | | 0.0 |
| Proceeds from trust of variable interest entity | 0.9 | | | | | | | |
| Cash distribution from affiliate | | | | 3.4 | 0.0 | | 0.3 | 0.1 |
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| Cash received from investments held in trust | | | | | | | | |
| Cash paid for transaction costs | | | | | | | | |
| Investment in marketable securities | | | | | | | | |
| Net cash provided by (used in) investing activities | 200.2 | -0.3 | | 3.4 | -237.3 | -54.8 | 0.3 | -0.2 |
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| CASH FLOWS FROM FINANCING ACTIVITIES | | | | | | | | |
| Costs associated with equity offering | | | | | -0.3 | | | |
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| Payment of underwriting commissions with equity offering of Kimbell Tiger Operating Company, net of adjustments | | | | | | | | |
| Contributions from Class B unitholders | 0.3 | | | | | | | |
| Redemption of Class B contributions on converted units | | | | 0.0 | -0.5 | | | -0.2 |
| Distributions to common unitholders | -22.7 | -31.2 | | -26.9 | -17.5 | -15.9 | -13.3 | -10.7 |
| Distribution to OpCo unitholders | -5.3 | -7.4 | | -3.9 | -6.5 | -6.5 | -5.5 | -5.6 |
| Distribution on Class B units | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Borrowings on long-term debt | 55.1 | 4.0 | | 17.1 | 19.1 | 96.0 | 36.1 | 4.0 |
| Repayments on long-term debt | -9.4 | -13.1 | | -27.5 | -9.7 | -71.6 | -6.3 | -9.6 |
| Payment of loan origination costs | -4.8 | | | -0.3 | -0.2 | -0.3 | -0.1 | -0.1 |
| Restricted units repurchased for tax withholding | | -4.9 | | | -3.3 | -2.1 | | |
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| Proceeds from initial public offering of Kimbell Tiger Operating Company | | | | | | | | |
| Redemption of Kimbell Tiger Acquisition Corporation equity units | | | | | | | | |
| Net cash (used in) provided by financing activities | -230.1 | -52.6 | | -43.2 | 207.8 | 26.8 | -25.7 | -23.4 |
| NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS | 1.6 | -5.8 | | 0.6 | 6.5 | | | |
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| Supplemental cash flow information: | | | | | | | | |
| Cash paid for interest | 5.9 | 5.1 | | 2.8 | 2.2 | 2.1 | 2.0 | 1.8 |
| Cash paid for taxes | | | | 2.0 | | | | |
| Non-cash investing and financing activities: | | | | | | | | |
| Units issued in exchange for oil and natural gas properties | 92.0 | | | | | | | |
| Recognition of tenant improvement asset | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 | 0.5 | |
| Reduction of deferred underwriting commission associated with redemption of Kimbell Tiger Acquisition Corporation equity units | | | | | | | | |
| Deferred underwriting commissions | | | | | | | | |