Loans and Allowance for Credit Losses - Schedule of Participating Mortgage Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 1,579,059	$ 1,542,358
Non-performing Loan Rate (%)	0.00%	0.55%
Gross Charge-offs	$ 22	$ 3
Commercial Portfolio Segment | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 985,394	$ 1,024,131
Non-performing Loan Rate (%)	0.00%	0.83%
Gross Charge-offs	$ 0	$ 0
Commercial Portfolio Segment | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 447,550	$ 422,042
Non-performing Loan Rate (%)	0.00%	0.00%
Gross Charge-offs	$ 0	$ 0
Commercial Portfolio Segment | Commercial construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 146,043	$ 96,134
Non-performing Loan Rate (%)	0.00%	0.00%
Gross Charge-offs	$ 0	$ 0
Commercial Portfolio Segment | Business banking
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 72	$ 51
Non-performing Loan Rate (%)	0.00%	0.00%
Gross Charge-offs	$ 22	$ 3