Derivative Financial Instruments - Notional amounts and fair values of derivative financial instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivative Financial Instruments
Notional Amount	$ 109,781	$ 66,566
Asset (Liability) Fair Value	59	74
Interest rate lock commitments
Derivative Financial Instruments
Notional Amount	51,207	33,406
Asset (Liability) Fair Value	202	270
Interest rate lock commitments \| Other Assets
Derivative Financial Instruments
Notional Amount	37,105	27,188
Asset (Liability) Fair Value	283	310
Interest rate lock commitments \| Other Liabilities
Derivative Financial Instruments
Notional Amount	14,102	6,218
Asset (Liability) Fair Value	(81)	(40)
Forward Commitments
Derivative Financial Instruments
Notional Amount	52,000	26,500
Asset (Liability) Fair Value	(75)	(176)
Forward Commitments \| Other Assets
Derivative Financial Instruments
Notional Amount	11,000
Asset (Liability) Fair Value	30
Forward Commitments \| Other Liabilities
Derivative Financial Instruments
Notional Amount	41,000	26,500
Asset (Liability) Fair Value	(105)	(176)
Customer derivatives - Interest rate swaps
Derivative Financial Instruments
Notional Amount	6,574	6,660
Asset (Liability) Fair Value	(68)	(20)
Customer derivatives - Interest rate swaps \| Other Assets
Derivative Financial Instruments
Notional Amount	3,287	3,330
Asset (Liability) Fair Value	500	141
Customer derivatives - Interest rate swaps \| Other Liabilities
Derivative Financial Instruments
Notional Amount	3,287	3,330
Asset (Liability) Fair Value	$ (568)	$ (161)

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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