Income Taxes	9 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesIn calculating the provision for income taxes, the Company uses an estimate of the annual effective tax rate based upon the facts and circumstances at each interim period. On a quarterly basis, the estimated annual effective tax rate is adjusted, as appropriate, based upon changes in facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and at each interim period thereafter.The provision for income taxes reflected U.S. federal, state and local taxes at an estimated effective tax rate of 33.9% and 24.0% for the nine months ended September 30, 2020 and 2019, respectively. The comparatively higher estimated effective tax rate for the nine months ended September 30, 2020 was primarily due to valuation allowances recorded for the tax effects of unrealized losses on certain Company investments.

- Definition

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.

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