Loans and Allowance for Credit Losses - Schedule of the Company's Loan participations (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 2,183,674	$ 2,136,457
Non-performing Loan Rate (%)	1.50%	1.71%
Gross Charge-offs	$ 3,507	$ 10,290
Commercial and industrial | Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 1,090,187	$ 1,031,237
Non-performing Loan Rate (%)	0.00%	0.00%
Gross Charge-offs	$ 0	$ 0
Commercial real estate | Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 946,567	$ 944,371
Non-performing Loan Rate (%)	3.46%	3.87%
Gross Charge-offs	$ 3,492	$ 10,290
Commercial construction | Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 145,851	$ 159,237
Non-performing Loan Rate (%)	0.00%	0.00%
Gross Charge-offs	$ 0	$ 0
Business banking | Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 1,069	$ 1,612
Non-performing Loan Rate (%)	0.00%	0.00%
Gross Charge-offs	$ 15	$ 0