Loans and Leases (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) numberOfLoans	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Receivables [Abstract]
Loans and leases, deferred fees and costs	$ 16,900		$ 16,900		$ 71,900
Number of PPP Loans | numberOfLoans			15,000
Total PPP Loan Amount			$ 1,900,000
PPP Loan Fees, Net of Costs			57,300
Discounts on acquired loans	24,200		24,200		30,200
Total loans pledged to secure borrowings	13,600,000		13,600,000
Interest Accrued on Loans and Leases	62,500		62,500		$ 58,500
Financing Receivable, Allowance for Credit Loss [Line Items]
Interest income recognized on leases	$ 7,100	$ 8,100	$ 13,800	$ 16,500
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