Subsequent Event Subsequent Event Table (Details) $ in Millions	Mar. 31, 2019 USD ($)
Subsequent Event [Line Items]
Branch Acquisition, Number of Branches	14
Branch Acquisition, Total Deposits	$ 525
Branch Acquisition, Total Loans	$ 120

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