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Loans - Loans by FICO Score, Consumer (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans, net of unearned income | $ 33,378,303 | [1] | $ 31,061,111 | [1] | $ 27,990,048
Consumer | Consumer real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 198,340 |  |  |  |
2019 | 819,799 |  |  |  |
2018 | 591,922 |  |  |  |
2017 | 572,833 |  |  |  |
2016 | 730,077 |  |  |  |
Prior to 2016 | 1,952,360 |  |  |  |
Revolving Loans | 915,536 |  |  |  |
Revolving Loans converted to term loans (c) | 338,516 |  |  |  |
Total loans, net of unearned income | 6,119,383 |  | 6,177,139 |  | 6,360,763
Consumer | Consumer real estate | FICO score 740 or greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 134,032 |  |  |  |
2019 | 586,720 |  |  |  |
2018 | 451,497 |  |  |  |
2017 | 438,007 |  |  |  |
2016 | 541,683 |  |  |  |
Prior to 2016 | 1,346,587 |  |  |  |
Revolving Loans | 646,462 |  |  |  |
Revolving Loans converted to term loans (c) | 142,848 |  |  |  |
Total loans, net of unearned income | 4,287,836 |  |  |  |
Consumer | Consumer real estate | FICO score 720-739 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 25,129 |  |  |  |
2019 | 80,851 |  |  |  |
2018 | 50,344 |  |  |  |
2017 | 42,134 |  |  |  |
2016 | 78,632 |  |  |  |
Prior to 2016 | 135,173 |  |  |  |
Revolving Loans | 75,392 |  |  |  |
Revolving Loans converted to term loans (c) | 31,629 |  |  |  |
Total loans, net of unearned income | 519,284 |  |  |  |
Consumer | Consumer real estate | FICO score 700-719 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 10,325 |  |  |  |
2019 | 63,306 |  |  |  |
2018 | 32,469 |  |  |  |
2017 | 36,606 |  |  |  |
2016 | 35,111 |  |  |  |
Prior to 2016 | 130,881 |  |  |  |
Revolving Loans | 58,913 |  |  |  |
Revolving Loans converted to term loans (c) | 29,201 |  |  |  |
Total loans, net of unearned income | 396,812 |  |  |  |
Consumer | Consumer real estate | FICO score 660-699 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 27,489 |  |  |  |
2019 | 54,870 |  |  |  |
2018 | 38,198 |  |  |  |
2017 | 33,127 |  |  |  |
2016 | 45,329 |  |  |  |
Prior to 2016 | 175,873 |  |  |  |
Revolving Loans | 80,018 |  |  |  |
Revolving Loans converted to term loans (c) | 54,440 |  |  |  |
Total loans, net of unearned income | 509,344 |  |  |  |
Consumer | Consumer real estate | FICO score 620-659 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 1,026 |  |  |  |
2019 | 21,260 |  |  |  |
2018 | 9,708 |  |  |  |
2017 | 11,482 |  |  |  |
2016 | 16,651 |  |  |  |
Prior to 2016 | 72,843 |  |  |  |
Revolving Loans | 28,433 |  |  |  |
Revolving Loans converted to term loans (c) | 31,527 |  |  |  |
Total loans, net of unearned income | 192,930 |  |  |  |
Consumer | Consumer real estate | FICO score less than 620 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 339 |  |  |  |
2019 | 12,792 |  |  |  |
2018 | 9,706 |  |  |  |
2017 | 11,477 |  |  |  |
2016 | 12,671 |  |  |  |
Prior to 2016 | 91,003 |  |  |  |
Revolving Loans | 26,318 |  |  |  |
Revolving Loans converted to term loans (c) | 48,871 |  |  |  |
Total loans, net of unearned income | 213,177 |  |  |  |
Consumer | Other Consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 17,102 |  |  |  |
2019 | 66,578 |  |  |  |
2018 | 38,263 |  |  |  |
2017 | 20,934 |  |  |  |
2016 | 13,070 |  |  |  |
Prior to 2016 | 37,727 |  |  |  |
Revolving Loans | 292,358 |  |  |  |
Revolving Loans converted to term loans (c) | 8,766 |  |  |  |
Total loans, net of unearned income | 494,798 |  | 495,864 |  | $ 506,230
Consumer | Other Consumer | FICO score 740 or greater |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 9,410 |  |  |  |
2019 | 41,336 |  |  |  |
2018 | 24,423 |  |  |  |
2017 | 12,035 |  |  |  |
2016 | 5,338 |  |  |  |
Prior to 2016 | 21,272 |  |  |  |
Revolving Loans | 176,917 |  |  |  |
Revolving Loans converted to term loans (c) | 3,293 |  |  |  |
Total loans, net of unearned income | 294,024 |  |  |  |
Consumer | Other Consumer | FICO score 720-739 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 1,509 |  |  |  |
2019 | 6,235 |  |  |  |
2018 | 3,799 |  |  |  |
2017 | 1,911 |  |  |  |
2016 | 1,054 |  |  |  |
Prior to 2016 | 2,954 |  |  |  |
Revolving Loans | 36,173 |  |  |  |
Revolving Loans converted to term loans (c) | 709 |  |  |  |
Total loans, net of unearned income | 54,344 |  |  |  |
Consumer | Other Consumer | FICO score 700-719 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 2,236 |  |  |  |
2019 | 5,986 |  |  |  |
2018 | 2,551 |  |  |  |
2017 | 2,103 |  |  |  |
2016 | 924 |  |  |  |
Prior to 2016 | 2,674 |  |  |  |
Revolving Loans | 23,185 |  |  |  |
Revolving Loans converted to term loans (c) | 934 |  |  |  |
Total loans, net of unearned income | 40,593 |  |  |  |
Consumer | Other Consumer | FICO score 660-699 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 3,219 |  |  |  |
2019 | 8,803 |  |  |  |
2018 | 4,355 |  |  |  |
2017 | 3,221 |  |  |  |
2016 | 1,524 |  |  |  |
Prior to 2016 | 4,041 |  |  |  |
Revolving Loans | 32,282 |  |  |  |
Revolving Loans converted to term loans (c) | 1,700 |  |  |  |
Total loans, net of unearned income | 59,145 |  |  |  |
Consumer | Other Consumer | FICO score 620-659 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 449 |  |  |  |
2019 | 2,760 |  |  |  |
2018 | 1,945 |  |  |  |
2017 | 912 |  |  |  |
2016 | 1,196 |  |  |  |
Prior to 2016 | 2,213 |  |  |  |
Revolving Loans | 13,020 |  |  |  |
Revolving Loans converted to term loans (c) | 632 |  |  |  |
Total loans, net of unearned income | 23,127 |  |  |  |
Consumer | Other Consumer | FICO score less than 620 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
2020 | 279 |  |  |  |
2019 | 1,458 |  |  |  |
2018 | 1,190 |  |  |  |
2017 | 752 |  |  |  |
2016 | 3,034 |  |  |  |
Prior to 2016 | 4,573 |  |  |  |
Revolving Loans | 10,781 |  |  |  |
Revolving Loans converted to term loans (c) | 1,498 |  |  |  |
Total loans, net of unearned income | 23,565 |  |  |  |
Unsecured Debt | Consumer | Other Consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Revolving Loans converted to term loans (c) | 1,500 |  |  |  |
HELOC | Consumer | Consumer real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Revolving Loans converted to term loans (c) | 9,000 |  |  |  |
Total loans, net of unearned income | $ 1,254,052 |  | $ 1,286,875 |  |
[1] | March 31, 2020 and December 31, 2019 include $20.8 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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