Loans Receivable - Amortized Cost by Portfolio Segment (Details) $ in Thousands	3 Months Ended
Mar. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Loans Receivable [Line Items]
Loans receivable	$ 4,428,165	$ 4,335,627
Allowance for credit losses on loans	(49,736)	(47,999)	$ (44,469)	$ (42,986)
Loans receivable, net	4,378,429	4,287,628
Unamortized net discount on acquired loans	(1,701)	(1,923)
Unamortized net deferred fee	$ (10,477)	(11,063)
Number of loan segments \| segment	4
Accrued Interest, after Allowance for Credit Loss	$ 13,800	13,300
Commercial business:
Loans Receivable [Line Items]
Loans receivable	3,414,639	3,374,485
Allowance for credit losses on loans	(33,913)	(31,303)	(29,937)	(30,718)
Commercial business: \| Commercial and industrial
Loans Receivable [Line Items]
Loans receivable	760,391	718,291
Allowance for credit losses on loans	(11,647)	(11,128)	(13,566)	(13,962)
Commercial business: \| Owner-occupied CRE
Loans Receivable [Line Items]
Loans receivable	951,583	958,620
Allowance for credit losses on loans	(9,392)	(8,999)	(7,525)	(7,480)
Commercial business: \| Non-owner-occupied CRE
Loans Receivable [Line Items]
Loans receivable	1,702,665	1,697,574
Allowance for credit losses on loans	(12,874)	(11,176)	(8,846)	(9,276)
Residential real estate
Loans Receivable [Line Items]
Loans receivable	386,357	375,342
Allowance for credit losses on loans	(3,478)	(3,473)	(2,902)	(2,872)
Real estate construction and land development:
Loans Receivable [Line Items]
Loans receivable	456,613	414,429
Allowance for credit losses on loans	(10,075)	(10,876)	(8,985)	(7,063)
Real estate construction and land development: \| Residential
Loans Receivable [Line Items]
Loans receivable	84,081	78,610
Allowance for credit losses on loans	(917)	(1,643)	(1,542)	(1,654)
Real estate construction and land development: \| Commercial and multifamily
Loans Receivable [Line Items]
Loans receivable	372,532	335,819
Allowance for credit losses on loans	(9,158)	(9,233)	(7,443)	(5,409)
Consumer
Loans Receivable [Line Items]
Loans receivable	170,556	171,371
Allowance for credit losses on loans	$ (2,270)	$ (2,347)	$ (2,645)	$ (2,333)

Number of loan segments.

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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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-Name Accounting Standards Codification
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-Publisher FASB
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Amount, after allowance for credit loss, of accrued interest on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-5

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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

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Amount of unamortized loan commitment, origination, and other costs (fees) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481598/310-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

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Amount of unamortized purchase premium (discount) on financing receivable. Excludes financing receivable covered under loss sharing agreement.

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