Loans and the Allowance for Credit Losses - Loans Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	$ 6,780,887		$ 6,189,490
Allowance for Loan Losses	(59,595)	$ (62,458)	(53,959)	$ (57,062)	$ (58,496)	$ (54,840)
Net Loans	6,721,292		6,135,531
Real Estate Loans:
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	4,719,277		4,194,413
Real Estate Loans: \| Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,896,707		2,611,279
Allowance for Loan Losses	(23,598)	(21,589)	(23,486)	(18,440)	(23,317)	(23,460)
Real Estate Loans: \| Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	774,170		639,069
Allowance for Loan Losses	(4,949)	(3,849)	(3,237)	(7,529)	(6,198)	(7,162)
Real Estate Loans: \| Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,048,400		944,065
Allowance for Loan Losses	(6,388)	(9,143)	(7,423)	(8,326)	(8,176)	(8,036)
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,990,998		1,921,833
Allowance for Loan Losses	(24,228)	(27,086)	(19,282)	(22,238)	(20,289)	(15,667)
Consumer and Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	70,612		73,244
Allowance for Loan Losses	$ (432)	$ (791)	$ (531)	$ (529)	$ (516)	$ (515)