Loans Receivable and Allowance for Credit Losses - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 43,436,000	$ 37,588,000	$ 34,340,000	$ 19,473,000
Loans receivable	4,275,178,000	3,634,792,000
Amortized cost in troubled debt restructurings	12,400,000	16,600,000
Financing receivable, troubled debt restructuring, allowance for loans	$ 2,200,000	$ 2,600,000
Loans modified as TDRs with a subsequent payment default | loan	0	0	0
Principal balances forgiven in connection with loan restructuring	$ 0	$ 0	$ 0
Minimum period to be considered for loan to have defaulted	90 days
Accrual status restoration period	6 months
PPP loans, net of deferred processing fees
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 159,000	45,203,000
Syndicated loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	156,649,000	125,761,000
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	9,766,000	8,837,000	$ 6,233,000	$ 4,105,000
Loans receivable	791,911,000	708,989,000
Commercial and Industrial | PPP loans, net of deferred processing fees
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	0	0
Loans receivable	159,000	45,200,000
Commercial and Industrial | Syndicated loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 156,600,000	$ 125,800,000