Derivative Financial Instruments - Notional amounts and fair values of derivative financial instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative Financial Instruments
Notional Amount	$ 688,786	$ 139,615
Asset (Liability) Fair Value	5,159	185
Interest rate lock commitments
Derivative Financial Instruments
Notional Amount	428,828	70,323
Asset (Liability) Fair Value	6,832	347
Interest rate lock commitments \| Other Assets
Derivative Financial Instruments
Notional Amount	406,422	47,660
Asset (Liability) Fair Value	6,932	504
Interest rate lock commitments \| Other Liabilities
Derivative Financial Instruments
Notional Amount	22,406	22,663
Asset (Liability) Fair Value	(100)	(157)
Forward Commitments
Derivative Financial Instruments
Notional Amount	218,000	62,750
Asset (Liability) Fair Value	(1,572)	(113)
Forward Commitments \| Other Assets
Derivative Financial Instruments
Notional Amount		4,500
Asset (Liability) Fair Value		6
Forward Commitments \| Other Liabilities
Derivative Financial Instruments
Notional Amount	218,000	58,250
Asset (Liability) Fair Value	(1,572)	(119)
Customer derivatives - interest rate swaps
Derivative Financial Instruments
Notional Amount	41,958	6,542
Asset (Liability) Fair Value	(101)	(49)
Customer derivatives - interest rate swaps \| Other Assets
Derivative Financial Instruments
Notional Amount	20,979	3,271
Asset (Liability) Fair Value	1,118	382
Customer derivatives - interest rate swaps \| Other Liabilities
Derivative Financial Instruments
Notional Amount	20,979	3,271
Asset (Liability) Fair Value	$ (1,219)	$ (431)

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=121590274&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=121590274&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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