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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Number of new stock issued during the period.

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Stockholders' and Members' Equity, Equity-Based Compensation (Details) $ / shares in Units, $ in Millions		2 Months Ended	3 Months Ended	6 Months Ended
	Feb. 11, 2020 $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) Intallment $ / shares shares
Class A Common Stock [Member]
Equity-Based Compensation [Abstract]
Total number of shares reserved for issuance (in shares)	1,385,799	1,385,799	1,385,799	1,385,799
Class B Common Stock [Member] \| Members of Executive Management [Member]
Equity-Based Compensation [Abstract]
Number of shares issued (in shares)	32,754
Restricted Stock Units (RSUs) [Member]
Equity-Based Compensation [Abstract]
Number of equal annual installments for vesting \| Intallment				4
Number of Shares [Abstract]
Issued on February 11, 2020 (in shares)		44,666
Awarded (in shares)		204,500		100,000
Vested (in shares)		0
Forfeited (in shares)		0
Unvested at March 31, 2020 (in shares)	44,666	249,166	249,166	249,166
Weighted Average Grant Date Fair Value [Abstract]
Issued on February 11, 2020 (in dollars per share) \| $ / shares		$ 14.61
Awarded (in dollars per share) \| $ / shares		16.01
Vested (in dollars per share) \| $ / shares		0
Forfeited (in dollars per share) \| $ / shares		0
Unvested at March 31, 2020 (in dollars per share) \| $ / shares	$ 14.61	$ 15.76	$ 15.76	$ 15.76
Compensation expense \| $			$ 0.2	$ 0.2
Unrecognized compensation expense \| $		$ 2.7	$ 2.7	$ 2.7
Weighted-average period of recognition				1 year 7 months 6 days
Restricted Stock Units (RSUs) [Member] \| Board of Directors [Member]
Equity-Based Compensation [Abstract]
Number of equal annual installments for vesting \| Intallment				4
Number of Shares [Abstract]
Awarded (in shares)				137,500
Vested (in shares)				37,500
Restricted Stock Units (RSUs) [Member] \| Messrs Singleton [Member]
Number of Shares [Abstract]
Awarded (in shares)	17,333
Restricted Stock Units (RSUs) [Member] \| Messrs Aisquith [Member]
Number of Shares [Abstract]
Awarded (in shares)	17,333
Restricted Stock Units (RSUs) [Member] \| Mr. Ezzell [Member]
Number of Shares [Abstract]
Awarded (in shares)	10,000
Performance Share Unit [Member]
Equity-Based Compensation [Abstract]
Number of equal annual installments for vesting \| Intallment				4
Percentage of target award granted				100.00%
Number of shares of common stock consisted in each unit (in shares)				1
Award vesting period				4 years
Number of Shares [Abstract]
Awarded (in shares)				67,000
Performance Share Unit [Member] \| Minimum [Member]
Equity-Based Compensation [Abstract]
Percentage of actual number of unit earned				0.00%
Performance Share Unit [Member] \| Maximum [Member]
Equity-Based Compensation [Abstract]
Percentage of actual number of unit earned				175.00%