Subsequent Events - Narrative (Details)	1 Months Ended
Oct. 31, 2018
Subsequent Event [Member] \| Alston Gayler and Co [Member]
Subsequent Event [Line Items]
Business acquisition, agreement date	2018-10

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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