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Income Taxes - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Related Party Transaction [Line Items]
Effective tax rate	13.80%	44.60%	11.60%	24.60%
Payable to related parties pursuant to tax receivable agreement	$ 101,404,000		$ 101,404,000		$ 69,636,000
Unrecognized tax positions	0		0
Tax Receivable Agreement
Related Party Transaction [Line Items]
Payable to related parties pursuant to tax receivable agreement	31,481,000		31,481,000
September 2019 Offering
Related Party Transaction [Line Items]
Deferred tax asset	41,130,000		41,130,000
Valuation allowance	$ 3,736,000		$ 3,736,000

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Carrying amount as of the balance sheet date of obligations due all related parties.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of unrecognized tax benefits.

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