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Allowance for Credit Losses - Credit Risk Profiles by Internally Assigned Grade (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Credit quality |  |  |
Loans and leases | $ 12,961,999 | $ 13,279,097 | $ 13,211,650
Loss |  |  |
Credit quality |  |  |
Loans and leases | 0 | 0 |
Commercial and Industrial |  |  |
Credit quality |  |  |
Loans and leases | 2,087,099 | 3,019,507 | 2,743,242
Commercial and Industrial | Pass |  |  |
Credit quality |  |  |
Loans and leases | 1,947,671 | 2,685,883 |
Commercial and Industrial | Special mention |  |  |
Credit quality |  |  |
Loans and leases | 33,621 | 164,897 |
Commercial and Industrial | Substandard |  |  |
Credit quality |  |  |
Loans and leases | 27,517 | 75,273 |
Commercial real estate |  |  |
Credit quality |  |  |
Loans and leases | 3,639,623 | 3,392,676 | 3,463,953
Commercial real estate | Pass |  |  |
Credit quality |  |  |
Loans and leases | 3,502,424 | 3,100,309 |
Commercial real estate | Special mention |  |  |
Credit quality |  |  |
Loans and leases | 119,337 | 226,905 |
Commercial real estate | Substandard |  |  |
Credit quality |  |  |
Loans and leases | 17,702 | 64,964 |
Construction |  |  |
Credit quality |  |  |
Loans and leases | 813,969 | 735,819 | 519,241
Construction | Pass |  |  |
Credit quality |  |  |
Loans and leases | 761,600 | 667,354 |
Construction | Special mention |  |  |
Credit quality |  |  |
Loans and leases | 1,307 | 15,104 |
Construction | Substandard |  |  |
Credit quality |  |  |
Loans and leases | 1,202 | 3,891 |
Lease financing |  |  |
Credit quality |  |  |
Loans and leases | 231,394 | 245,411 | $ 202,483
Lease financing | Pass |  |  |
Credit quality |  |  |
Loans and leases | 224,454 | 234,933 |
Lease financing | Special mention |  |  |
Credit quality |  |  |
Loans and leases | 5,173 | 4,099 |
Lease financing | Substandard |  |  |
Credit quality |  |  |
Loans and leases | 1,767 | 6,379 |
Commercial Lending |  |  |
Credit quality |  |  |
Loans and leases | $ 6,772,085 | $ 7,393,413 |

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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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