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Loans (Age Analysis of Past Due Consumer Loans, Segregated By Class and Year of Origination) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | $ 128,317 |
Current Loans | 17,352,992 |
Loans, net of unearned discounts | 17,481,309 | $ 14,750,332
Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 96,862 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 31,455 |
Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 11,137 |
Current Loans | 1,319,637 |
Loans, net of unearned discounts | 1,330,774 | 1,194,413
Total consumer real estate loans [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,267 |
Current Loans | 434,939 |
Loans, net of unearned discounts | 436,206 |
Total consumer real estate loans [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 682 |
Current Loans | 16,104 |
Loans, net of unearned discounts | 16,786 |
Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 8,090 |
Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 652 |
Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 531 |
Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 3,047 |
Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 615 |
Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 151 |
Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 6,788 |
Current Loans | 498,892 |
Loans, net of unearned discounts | 505,680 | $ 519,332
Consumer Loan [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 3,269 |
Current Loans | 386,791 |
Loans, net of unearned discounts | 390,060 |
Consumer Loan [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 748 |
Current Loans | 28,529 |
Loans, net of unearned discounts | 29,277 |
Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 5,537 |
Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 2,238 |
Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 727 |
Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,251 |
Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,031 |
Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 21 |
2020 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 240 |
Current Loans | 336,441 |
Loans, net of unearned discounts | 336,681 |
2020 | Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 225 |
2020 | Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 15 |
2020 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,821 |
Current Loans | 45,286 |
Loans, net of unearned discounts | 47,107 |
2020 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,750 |
2020 | Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 71 |
2019 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,177 |
Current Loans | 166,323 |
Loans, net of unearned discounts | 167,500 |
2019 | Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,038 |
2019 | Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 139 |
2019 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 310 |
Current Loans | 27,813 |
Loans, net of unearned discounts | 28,123 |
2019 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 300 |
2019 | Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 10 |
2018 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,665 |
Current Loans | 94,374 |
Loans, net of unearned discounts | 96,039 |
2018 | Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,556 |
2018 | Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 109 |
2018 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 571 |
Current Loans | 5,397 |
Loans, net of unearned discounts | 5,968 |
2018 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 453 |
2018 | Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 118 |
2017 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,259 |
Current Loans | 80,625 |
Loans, net of unearned discounts | 81,884 |
2017 | Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 553 |
2017 | Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 706 |
2017 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 52 |
Current Loans | 2,799 |
Loans, net of unearned discounts | 2,851 |
2017 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 52 |
2017 | Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 0 |
2016 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 653 |
Current Loans | 66,241 |
Loans, net of unearned discounts | 66,894 |
2016 | Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 628 |
2016 | Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 25 |
2016 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 17 |
Current Loans | 1,705 |
Loans, net of unearned discounts | 1,722 |
2016 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 17 |
2016 | Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 0 |
Prior Years | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 4,194 |
Current Loans | 124,590 |
Loans, net of unearned discounts | 128,784 |
Prior Years | Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 2,907 |
Prior Years | Total consumer real estate loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 1,287 |
Prior Years | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 0 |
Current Loans | 572 |
Loans, net of unearned discounts | 572 |
Prior Years | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | 0 |
Prior Years | Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Loans | $ 0 |

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