Loans - Loans Held for Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	$ 6,179,522		$ 5,928,933
Allowance for credit losses	(78,666)	$ (77,362)	(65,917)	$ (59,678)	$ (56,077)	$ (47,547)
Loans, net of allowance for credit losses	6,100,856		5,845,915
Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			5,911,832
Allowance for credit losses			(65,917)
Loans, net of allowance for credit losses			5,845,915
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	2,459,358		3,025,074
Allowance for credit losses	(34,641)	(33,197)	(40,785)	(35,588)	(33,305)	(31,622)
Commercial and industrial | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			2,310,929
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	1,842,455		1,753,360
Allowance for credit losses	(23,102)	(21,598)	(19,754)	(19,566)	(18,351)	(13,198)
Commercial real estate | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			1,845,703
Commercial real estate | Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	767,135
Commercial real estate | Non-owner occupied | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			779,546
Commercial real estate | Owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	631,352
Commercial real estate | Owner occupied | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			636,272
Commercial real estate | Construction and land
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	329,433
Commercial real estate | Construction and land | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			327,817
Commercial real estate | Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	114,535
Commercial real estate | Multifamily | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			102,068
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	1,059,074		1,106,793
Allowance for credit losses	(13,157)	(14,959)	(2,963)	(2,617)	(2,418)	(836)
Residential real estate | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			1,003,931
Public finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	602,844
Allowance for credit losses	(5,641)	(5,506)	(1,664)	(1,430)	(1,538)	(1,544)
Public finance | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			590,284
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	37,681		43,706
Allowance for credit losses	(702)	(854)	(352)	(333)	(318)	(235)
Consumer | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			42,588
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans	178,110
Allowance for credit losses	$ (1,423)	$ (1,248)	(399)	$ (144)	$ (147)	$ (112)
Other | Adjusted beginning balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans			$ 118,397