| 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 | | | | 89.9 | 50.3 | 42.4 | -82.1 | -115.3 |
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| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Depreciation and depletion expense | | | | 42.6 | 39.6 | 36.8 | 37.1 | 38.9 |
| Amortization of right-of-use assets | | | | 0.2 | | | | |
| Amortization of loan origination costs | | | | 1.7 | 1.6 | 1.6 | 1.4 | 1.3 |
| Equity income in affiliate | | | | -4.3 | -1.2 | -1.1 | -1.0 | -1.1 |
| Cash distribution from affiliate | | | | 4.3 | 1.2 | 1.0 | 0.7 | 0.5 |
| Unit-based compensation | | | | 10.3 | 10.1 | 10.6 | 10.4 | 10.1 |
| (Gain) loss on derivative instruments, net of settlements | | | | 8.7 | 26.4 | 20.3 | 37.6 | 32.9 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Oil, natural gas and NGL receivables | | | | -29.9 | -16.8 | -17.6 | -14.6 | -12.0 |
| Accounts receivable and other current assets | | | | -0.6 | -0.8 | -2.1 | -0.5 | -1.2 |
| Accounts payable | | | | 0.5 | 0.9 | -0.1 | 0.0 | -0.2 |
| Other current liabilities | | | | 1.3 | 1.1 | -0.5 | 0.5 | 0.2 |
| Operating lease liabilities | | | | -0.3 | -0.3 | -0.3 | -0.3 | -0.3 |
| Interest earned on marketable securities in trust account | | | | | | | | |
| Other assets and liabilities | | | | | | | | |
| Net cash provided by operating activities | | | | 123.9 | 112.0 | 91.4 | 83.4 | 70.7 |
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| CASH FLOWS FROM INVESTING ACTIVITIES | | | | | | | | |
| Purchases of property and equipment | | | | -0.2 | -0.4 | -0.8 | -1.7 | -1.6 |
| Purchase of oil and natural gas properties | | | | -55.2 | -55.2 | -55.3 | | -0.7 |
| Cash distribution from affiliate | | | | 3.8 | 0.5 | | 0.5 | 0.4 |
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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 | | | | -288.5 | -292.1 | -55.6 | -2.7 | -3.4 |
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| CASH FLOWS FROM FINANCING ACTIVITIES | | | | | | | | |
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| Payment of underwriting commissions with equity offering of Kimbell Tiger Operating Company, net of adjustments | | | | | | | | |
| Redemption of Class B contributions on converted units | | | | -0.5 | -0.6 | | | -0.3 |
| Distributions to common unitholders | | | | -73.6 | -57.4 | -47.3 | -38.8 | -30.3 |
| Distribution to OpCo unitholders | | | | -22.4 | -24.1 | -21.5 | -19.0 | -16.5 |
| Distribution on Class B units | | | | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Borrowings on long-term debt | | | | 168.3 | 155.2 | 136.6 | 46.1 | 10.5 |
| Repayments on long-term debt | | | | -115.1 | -97.2 | -91.0 | -23.1 | -19.3 |
| Payment of loan origination costs | | | | -0.9 | -0.8 | -0.7 | -4.7 | -4.7 |
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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 | | | | 165.7 | 185.5 | -38.6 | -80.3 | -65.6 |
| NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS | | | | 7.1 | 6.5 | | | |
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| Supplemental cash flow information: | | | | | | | | |
| Cash paid for interest | | | | 9.1 | 8.1 | 7.5 | 6.9 | 6.2 |
| Cash paid for taxes | | | | 2.0 | | | | |
| Non-cash investing and financing activities: | | | | | | | | |
| Recognition of tenant improvement asset | | | | 0.5 | 0.5 | 0.4 | 0.5 | |
| Reduction of deferred underwriting commission associated with redemption of Kimbell Tiger Acquisition Corporation equity units | | | | | | | | |
| Deferred underwriting commissions | | | | | | | | |