Loans - Composition of Loan Portfolio (Parenthetical) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	$ 1,155,872	$ 1,099,736
SBA Loans—Non-Real Estate
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	123,682	75,151
SBA Loans—Non-Real Estate \| SBA PPP Loan
Loans And Leases Receivable Disclosure [Line Items]
Gross loans receivable	$ 113,600	$ 64,900

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant