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Loans, Allowance for Credit Losses, and Asset Quality Information - Summary of Major Categories of Total Loans Outstanding (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2024	Sep. 30, 2023	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 8,076,266		$ 8,150,280
Unamortized net deferred loan fees	240		(178)
Total loans	$ 8,076,506		8,150,102
Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	100.00%	100.00%
Total SBA loans included in the table above
Loans and Leases Receivable Disclosure [Line Items]
Total loans	$ 142,359		143,246
Guaranteed portions of SBA loans included in table above
Loans and Leases Receivable Disclosure [Line Items]
Total loans	35,984		35,462
Unguaranteed portions of SBA loans included in table above
Loans and Leases Receivable Disclosure [Line Items]
Total loans	106,375		107,784
Sold portions of SBA loans with servicing retained - not included in tables above
Loans and Leases Receivable Disclosure [Line Items]
Total loans	344,115		349,275
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 872,623		905,862
Commercial and industrial | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	11.00%	11.00%
Real estate, commercial | Construction, development & other land loans
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 904,216		992,980
Real estate, commercial | Construction, development & other land loans | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	11.00%	12.00%
Real estate, commercial | Commercial real estate - owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 1,238,759		1,259,022
Real estate, commercial | Commercial real estate - owner occupied | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	15.00%	16.00%
Real estate, commercial | Commercial real estate - non owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 2,524,221		2,528,060
Real estate, commercial | Commercial real estate - non owner occupied | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	31.00%	31.00%
Real estate, commercial | Multi-family real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 457,142		421,376
Real estate, commercial | Multi-family real estate | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	6.00%	5.00%
Real estate, mortgage | Residential 1-4 family real estate
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 1,684,173		1,639,469
Real estate, mortgage | Residential 1-4 family real estate | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	21.00%	20.00%
Real estate, mortgage | Home equity loans/lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 328,466		335,068
Real estate, mortgage | Home equity loans/lines of credit | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	4.00%	4.00%
Consumer loans
Loans and Leases Receivable Disclosure [Line Items]
Total	$ 66,666		$ 68,443
Consumer loans | Financing Receivable | Loan Category Concentration Risk
Loans and Leases Receivable Disclosure [Line Items]
Percentage	1.00%	1.00%

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