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Capital Structure - Amended and Restated 2015 Management Incentive Plan (Details) - shares	Jun. 05, 2020	Jun. 30, 2017
2015 Management Incentive Plan | Class A common stock
Class of Stock [Line Items]
Number of shares of stock authorized (in shares)	21,000,000	16,000,000

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Number of shares authorized for issuance under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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