Allowance for Credit Losses (Allocation of Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses	$ 178,493	$ 224,314	$ 225,141	$ 223,712
Net loans and leases	32,193,029	32,567,661
PCI Loans	337,624	462,882
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses	71,213	80,842	142,369	139,043
Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses	$ 92,478	$ 119,485	$ 75,236	$ 75,525

The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for loans accounted for as debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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