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Allowance for Credit Losses - Credit Risk Profiles Based on Payment Activity, Not Subject to Loan Grading (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | $ 12,961,999 | $ 13,279,097 | $ 13,211,650
Residential mortgage |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | 4,083,367 | 3,690,218 |
Home equity |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases |  | 841,624 |
Consumer loans |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases |  | 1,353,842 |
Residential and consumer |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | 12,961,999 | 13,279,097 |
Residential Mortgage |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | 4,083,367 | 3,690,218 | 4,662,175
Residential Mortgage | Home equity |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases |  | 4,531,842 |
Home equity Line |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | 876,608 | 841,624 |
Consumer |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | 1,229,939 | $ 1,353,842 | $ 1,620,556
Residential Mortgage. |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | 4,959,975 |  |
Home Equity Loans and Lines of Credit |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans and leases | $ 876,608 |  |

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- Definition Amount before allowance and after 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 + Details
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