Fair Value of Assets and Liabilities - Narrative (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair value measurement transfers from one level to another	$ 0	$ 0	$ 0
Loans Held For Sale \| Gain (Loss) on Sale of Loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Changes in fair value, gains	$ (5,368,000)	$ 661,000	$ 155,000

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612

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