Fair Value Measurements Balance Sheet Location of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	$ 971	$ 460
Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	191	0
Forward Sales of Mortgage Backed Securities [Member] \| Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	0	177
Forward Sales of Mortgage Backed Securities [Member] \| Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	125	0
Interest Rate Lock Commitments [Member] \| Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	971	271
Interest Rate Lock Commitments [Member] \| Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	0	0
Whole Loan Contracts [Member] \| Other Assets [Member]
Financial Insturments, Fair Value [Line Items]
Financial Instrument, Fair Value	0	12
Whole Loan Contracts [Member] \| Other Liabilities [Member]
Financial Insturments, Fair Value [Line Items]
Fair Value Disclosure, Recurring	$ 66	$ 0

Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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