Other Real Estate Owned - Summary of Other Real Estate Owned (Parenthetical) (Details) $ in Thousands	Jul. 31, 2017 USD ($)
Clayton Banks
Real Estate Properties [Line Items]
Acquisition of excess land and facilities held for sale as part of merger	$ 4,147

The cash outflow from the acquisition of a piece of land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireHeldForSaleRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration