Derivatives - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 122	$ 77
Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets	1,161	261
Derivative liabilities	122	77
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative assets	1,117	873
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative assets	1,239	950
Derivative liabilities	122	77
Not Designated as Hedging Instrument \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets	122	77
Derivative liabilities	122	77
Not Designated as Hedging Instrument \| Interest rate swaps \| Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	122	77
Not Designated as Hedging Instrument \| Interest rate swaps \| Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	122	77
Not Designated as Hedging Instrument \| Interest rate lock commitments \| Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 1,117	$ 873

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant