Number of loan segments.

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Amount, after allowance for credit loss, of accrued interest on financing receivable.

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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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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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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.

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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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Loans Receivable - Amortized Cost by Portfolio Segment (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) segment	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Loans Receivable [Line Items]
Loans receivable	$ 4,266,858		$ 4,050,858
Allowance for credit losses on loans	(46,947)	$ (46,408)	(42,986)	$ (42,089)	$ (39,696)	$ (42,361)
Loans receivable, net	4,219,911		4,007,872
Unamortized net discount on acquired loans	(2,036)		(2,501)
Unamortized net deferred fee	$ (10,949)		(10,016)
Number of loan segments \| segment	4
Accrued Interest, after Allowance for Credit Loss	$ 12,500		11,300
Commercial business:
Loans Receivable [Line Items]
Loans receivable	3,335,196		3,217,240
Allowance for credit losses on loans	(31,105)	(31,273)	(30,718)	(31,940)	(31,707)	(33,049)
Commercial business: \| Commercial and industrial
Loans Receivable [Line Items]
Loans receivable	691,318		693,568
Allowance for credit losses on loans	(11,745)	(13,288)	(13,962)	(14,668)	(14,033)	(17,777)
Commercial business: \| Owner-occupied CRE
Loans Receivable [Line Items]
Loans receivable	953,779		937,040
Allowance for credit losses on loans	(8,694)	(8,503)	(7,480)	(7,719)	(8,162)	(6,411)
Commercial business: \| Non-owner-occupied CRE
Loans Receivable [Line Items]
Loans receivable	1,690,099		1,586,632
Allowance for credit losses on loans	(10,666)	(9,482)	(9,276)	(9,553)	(9,512)	(8,861)
Residential real estate
Loans Receivable [Line Items]
Loans receivable	377,448		343,631
Allowance for credit losses on loans	(3,549)	(2,865)	(2,872)	(2,545)	(2,137)	(1,409)
Real estate construction and land development:
Loans Receivable [Line Items]
Loans receivable	380,828		294,112
Allowance for credit losses on loans	(9,959)	(9,685)	(7,063)	(5,104)	(3,284)	(5,276)
Real estate construction and land development: \| Residential
Loans Receivable [Line Items]
Loans receivable	70,804		80,074
Allowance for credit losses on loans	(1,508)	(1,671)	(1,654)	(1,294)	(1,081)	(1,304)
Real estate construction and land development: \| Commercial and multifamily
Loans Receivable [Line Items]
Loans receivable	310,024		214,038
Allowance for credit losses on loans	(8,451)	(8,014)	(5,409)	(3,810)	(2,203)	(3,972)
Consumer
Loans Receivable [Line Items]
Loans receivable	173,386		195,875
Allowance for credit losses on loans	$ (2,334)	$ (2,585)	$ (2,333)	$ (2,500)	$ (2,568)	$ (2,627)