Income Taxes (Notes)	6 Months Ended
Income Taxes (Notes)	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes The Company recorded an effective tax rate of 22.5 percent and 36.4 percent for the three months ended June 30, 2021 and 2020, respectively. The effective tax rate for the three months ended June 30, 2021 differed from the statutory Federal income tax rate of 21.0 percent primarily due to state income taxes and the impact of ASU 2016-09 related to share-based payments. The effective tax rate for the three months ended June 30, 2020 differed from the statutory federal income tax rate of 21.0 percent primarily due to the tax accounting impact of the CARES Act which allowed the Company to carryback the 2020 net operating loss at the 35.0 percent rate applicable in earlier years. While the Company expects its effective tax rate to be fairly consistent in the near term, it will vary depending on recurring items such as the amount of income earned in each state and the state tax rate applicable to such income. Discrete items during interim periods may also affect the Company's tax rates. The Company recorded an effective tax rate of 22.4 percent and 54.5 percent for the six months ended June 30, 2021 and 2020, respectively. The effective tax rate for the six months ended June 30, 2021 differed from the statutory Federal income tax rate of 21.0 percent primarily due to state income taxes and the impact of ASU 2016-09 related to share-based payments. The 54.5 percent effective tax rate for the six months ended June 30, 2020 differed from the statutory federal income tax rate of 21.0 percent primarily due to the tax accounting impact of the CARES Act which included a $39.6 million discrete federal income tax benefit related to the full utilization of 2018 and 2019 net operating losses as well as the ability to carryback the 2020 net operating loss at a 35.0 percent rate applicable in earlier years.

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.