Loans (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 01, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)		$ 3,372,199		$ 3,372,199			$ 3,402,940
Financing Receivable, Nonaccrual, No Allowance		1,000		1,000			1,300
Provision for Loan, Lease, and Other Losses		3,088	$ 11,834	(1,661)	$ 28,803
Off-Balance Sheet, Credit Loss, Liability		2,200		2,200		$ 2,400	2,900
North Star Leasing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	$ 83,326
Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value	5,248
Paycheck Protection Program [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)		187,600		187,600
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums		7,100		7,100
Amortization of Deferred Loan Origination Fees, Net		3,400	1,900	8,100	1,900
Loans and Leases Receivable, Gross		159,200		159,200			488,900
Total loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)		3,372,199		3,372,199			3,402,940
Interest Receivable		8,600		8,600			10,900
Provision for Loan, Lease, and Other Losses		44	$ 11,160	(4,367)	$ 27,166
Finance Leases Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)		95,643		95,643			$ 0
Provision for Loan, Lease, and Other Losses	3,288	$ 349		349
Finance Leases Portfolio Segment | North Star Leasing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan, Lease, and Other Losses	$ 3,288			$ 3,288