Loans and Allowance for Loan Losses - PPP Loans and CARES Act Deferrals (Details) $ in Thousands	Sep. 30, 2021 USD ($) loan	Dec. 31, 2020 USD ($)
Financing Receivable, Impaired [Line Items]
Total Loans	$ 1,766,288	$ 1,454,801
Commercial and non-residential real estate
Financing Receivable, Impaired [Line Items]
Loans approved for modification	6,600
Consumer
Financing Receivable, Impaired [Line Items]
Loans approved for modification	$ 2,700
SBA PPP
Financing Receivable, Impaired [Line Items]
Number of loans \| loan	733
Original balance of loans	$ 27,900
Total Loans	$ 119,400

Amount, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant