Subsequent Events - Narrative (Details)	May 01, 2018 shares
Tennessee Bancshares [Member] \| Common Stock [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Common shares converted (in shares)	0.8065

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.

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