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Loans - Loans by FICO Score, Consumer (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans, net of unearned income | $ 32,708,937 | [1] | $ 31,061,111 | [1] | $ 29,712,810
Consumer | Consumer real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 525,422 |  |  |  |
2019 | 789,595 |  |  |  |
2018 | 514,908 |  |  |  |
2017 | 539,006 |  |  |  |
2016 | 684,993 |  |  |  |
Prior to 2016 | 1,801,009 |  |  |  |
Revolving loans | 884,134 |  |  |  |
Revolving loans converted to term loans (c) | 313,326 |  |  |  |
Total loans, net of unearned income | 6,052,393 |  | 6,177,139 |  | 6,303,134
Consumer | Consumer real estate | FICO score 740 or greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 394,137 |  |  |  |
2019 | 576,132 |  |  |  |
2018 | 410,188 |  |  |  |
2017 | 420,822 |  |  |  |
2016 | 527,019 |  |  |  |
Prior to 2016 | 1,255,357 |  |  |  |
Revolving loans | 626,844 |  |  |  |
Revolving loans converted to term loans (c) | 135,436 |  |  |  |
Total loans, net of unearned income | 4,345,935 |  |  |  |
Consumer | Consumer real estate | FICO score 720-739 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 43,808 |  |  |  |
2019 | 67,904 |  |  |  |
2018 | 26,383 |  |  |  |
2017 | 37,259 |  |  |  |
2016 | 48,677 |  |  |  |
Prior to 2016 | 132,407 |  |  |  |
Revolving loans | 76,045 |  |  |  |
Revolving loans converted to term loans (c) | 28,913 |  |  |  |
Total loans, net of unearned income | 461,396 |  |  |  |
Consumer | Consumer real estate | FICO score 700-719 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 31,459 |  |  |  |
2019 | 66,155 |  |  |  |
2018 | 28,201 |  |  |  |
2017 | 26,164 |  |  |  |
2016 | 45,038 |  |  |  |
Prior to 2016 | 110,244 |  |  |  |
Revolving loans | 54,941 |  |  |  |
Revolving loans converted to term loans (c) | 29,613 |  |  |  |
Total loans, net of unearned income | 391,815 |  |  |  |
Consumer | Consumer real estate | FICO score 660-699 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 41,314 |  |  |  |
2019 | 51,096 |  |  |  |
2018 | 33,382 |  |  |  |
2017 | 32,745 |  |  |  |
2016 | 36,625 |  |  |  |
Prior to 2016 | 153,335 |  |  |  |
Revolving loans | 76,593 |  |  |  |
Revolving loans converted to term loans (c) | 44,067 |  |  |  |
Total loans, net of unearned income | 469,157 |  |  |  |
Consumer | Consumer real estate | FICO score 620-659 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 12,524 |  |  |  |
2019 | 17,140 |  |  |  |
2018 | 10,922 |  |  |  |
2017 | 12,789 |  |  |  |
2016 | 13,178 |  |  |  |
Prior to 2016 | 70,067 |  |  |  |
Revolving loans | 24,185 |  |  |  |
Revolving loans converted to term loans (c) | 29,940 |  |  |  |
Total loans, net of unearned income | 190,745 |  |  |  |
Consumer | Consumer real estate | FICO score less than 620 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 2,180 |  |  |  |
2019 | 11,168 |  |  |  |
2018 | 5,832 |  |  |  |
2017 | 9,227 |  |  |  |
2016 | 14,456 |  |  |  |
Prior to 2016 | 79,599 |  |  |  |
Revolving loans | 25,526 |  |  |  |
Revolving loans converted to term loans (c) | 45,357 |  |  |  |
Total loans, net of unearned income | 193,345 |  |  |  |
Consumer | Other Consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 26,822 |  |  |  |
2019 | 55,913 |  |  |  |
2018 | 32,571 |  |  |  |
2017 | 17,220 |  |  |  |
2016 | 10,011 |  |  |  |
Prior to 2016 | 26,315 |  |  |  |
Revolving loans | 269,748 |  |  |  |
Revolving loans converted to term loans (c) | 10,710 |  |  |  |
Total loans, net of unearned income | 449,310 |  | 495,864 |  | $ 494,376
Consumer | Other Consumer | FICO score 740 or greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 16,160 |  |  |  |
2019 | 36,450 |  |  |  |
2018 | 21,476 |  |  |  |
2017 | 10,499 |  |  |  |
2016 | 3,988 |  |  |  |
Prior to 2016 | 14,774 |  |  |  |
Revolving loans | 173,832 |  |  |  |
Revolving loans converted to term loans (c) | 4,401 |  |  |  |
Total loans, net of unearned income | 281,580 |  |  |  |
Consumer | Other Consumer | FICO score 720-739 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 3,238 |  |  |  |
2019 | 5,226 |  |  |  |
2018 | 2,784 |  |  |  |
2017 | 1,615 |  |  |  |
2016 | 747 |  |  |  |
Prior to 2016 | 1,844 |  |  |  |
Revolving loans | 27,603 |  |  |  |
Revolving loans converted to term loans (c) | 1,319 |  |  |  |
Total loans, net of unearned income | 44,376 |  |  |  |
Consumer | Other Consumer | FICO score 700-719 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 2,168 |  |  |  |
2019 | 4,246 |  |  |  |
2018 | 2,542 |  |  |  |
2017 | 1,521 |  |  |  |
2016 | 706 |  |  |  |
Prior to 2016 | 1,980 |  |  |  |
Revolving loans | 19,983 |  |  |  |
Revolving loans converted to term loans (c) | 1,052 |  |  |  |
Total loans, net of unearned income | 34,198 |  |  |  |
Consumer | Other Consumer | FICO score 660-699 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 3,654 |  |  |  |
2019 | 6,546 |  |  |  |
2018 | 3,149 |  |  |  |
2017 | 2,172 |  |  |  |
2016 | 1,423 |  |  |  |
Prior to 2016 | 2,737 |  |  |  |
Revolving loans | 27,534 |  |  |  |
Revolving loans converted to term loans (c) | 1,581 |  |  |  |
Total loans, net of unearned income | 48,796 |  |  |  |
Consumer | Other Consumer | FICO score 620-659 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 1,269 |  |  |  |
2019 | 2,386 |  |  |  |
2018 | 1,576 |  |  |  |
2017 | 891 |  |  |  |
2016 | 836 |  |  |  |
Prior to 2016 | 1,813 |  |  |  |
Revolving loans | 10,759 |  |  |  |
Revolving loans converted to term loans (c) | 963 |  |  |  |
Total loans, net of unearned income | 20,493 |  |  |  |
Consumer | Other Consumer | FICO score less than 620 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 333 |  |  |  |
2019 | 1,059 |  |  |  |
2018 | 1,044 |  |  |  |
2017 | 522 |  |  |  |
2016 | 2,311 |  |  |  |
Prior to 2016 | 3,167 |  |  |  |
Revolving loans | 10,037 |  |  |  |
Revolving loans converted to term loans (c) | 1,394 |  |  |  |
Total loans, net of unearned income | 19,867 |  |  |  |
Unsecured Debt | Consumer | Other Consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Revolving loans converted to term loans (c) | 3,900 |  |  |  |
HELOC | Consumer | Consumer real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Revolving loans converted to term loans (c) | 10,800 |  |  |  |
Total loans, net of unearned income | $ 1,197,460 |  | $ 1,286,875 |  |
[1] | June 30, 2020 and December 31, 2019 include $16.9 million and $18.8 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

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