Related Party Transactions - Narrative (Details)	Oct. 09, 2018
Class B common stock \| Terence E. Adderley Revocable Trust K
Related Party Transaction [Line Items]
Ownership percentage of parent company	91.60%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration