Loans and Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Receivables [Abstract]
Loans and leases, deferred fees and costs	$ 75,800		$ 75,800		$ 84,700
Discounts on acquired loans	587,200		587,200		6,100
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans pledged to secure borrowings	3,735,683		3,735,683
Carrying value of loans and leases sold			698,400
Carrying Value of Loans Sold, Non-relationship Jumbo			620,600
Interest income recognized on leases	4,700	$ 4,400	14,100	$ 14,300
Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	399,400		399,400
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	361,200		361,200
Asset Pledged as Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans pledged to secure borrowings	$ 21,200,000		$ 21,200,000
Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Lease term	3 years		3 years
Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Lease term	5 years		5 years
Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Interest Receivable	$ 153,800		$ 153,800		$ 86,800