Subsequent Events (Details) $ in Millions	Feb. 21, 2018 USD ($)
Multi-family
Subsequent Events
Amount of loans held for sale reclassified to loans held for investment	$ 16.9

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