Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s effective tax rates for the three and six months ended June 30, 2020 were 2.7% on a pre-tax loss of $92.0 million and 5.5% on a pre-tax loss of $4,681.0 million, respectively, as compared to effective tax rates of 19.3% on a pre-tax income of $63.4 million and (17.7)% on a pre-tax loss of $48.3 million for the three and six months ended June 30, 2019, respectively. The effective tax rates for the three and six months ended June 30, 2020 were lower than the statutory federal rate of 21% as a result of maintaining a valuation allowance against substantially all of the Company’s net deferred tax assets. A valuation allowance was initially recorded against substantially all of the Company’s net deferred tax assets as of March 31, 2020 and was maintained as of June 30, 2020. The effective tax rate for the three months ended June 30, 2019 was lower than the statutory federal rate of 21% primarily due to the impact of non-controlling interests, partially offset by state income taxes and the impact of other permanent differences, primarily non-deductible executive compensation. The effective tax rate for the six months ended June 30, 2019 was lower than the statutory rate primarily due to the impacts of non-controlling interests and equity-based compensation shortfalls. These decreases were partially offset by state income taxes and other permanent differences, primarily non-deductible executive compensation. Valuation allowance. The Company increased its valuation allowance by $22.9 million to $853.4 million as of June 30, 2020. Based on the material write-down of the carrying value of the Company’s oil and gas properties recognized in the first quarter of 2020 and the Company’s expected operating results in subsequent quarters, the Company projects it will be in a net deferred tax asset position at December 31, 2020. The Company concluded it is more likely than not that some or all of the benefits from its deferred tax assets will not be realized, and as such, recorded a valuation allowance on these assets. Management assesses the available positive and negative evidence to estimate whether sufficient future taxable income will be generated to permit the use of deferred tax assets. A significant piece of objective negative evidence evaluated is the cumulative loss incurred over recent years. Such objective negative evidence limits the ability to consider other subjective positive evidence. The amount of the deferred tax asset considered realizable could be adjusted if estimates of future taxable income are reduced or increased or if objective negative evidence in the form of cumulative losses is no longer present and additional weight is given to subjective evidence such as future growth. As such, the Company will continue to assess the valuation allowance on an ongoing basis. As of December 31, 2019, the Company had a valuation allowance of $2.9 million recorded against its Montana net operating loss carryforwards.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.