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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, 2021 | Dec. 31, 2020
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | $ 16,336,397 | $ 17,481,309
Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 87,675 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 56,722 |
Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 144,397 |
Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 16,192,000 |
Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 1,410,790 | 1,330,774
Total consumer real estate loans [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 506,450 | 436,206
Total consumer real estate loans [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 12,725 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 4,877 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 126 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 1,732 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 2,513 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 991 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 185 | 151
Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 7,390 | 11,137
Total consumer real estate loans [Member] | Financial Asset, Past Due | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,117 | 1,267
Total consumer real estate loans [Member] | Financial Asset, Past Due | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,917 | 682
Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,403,400 | 1,319,637
Total consumer real estate loans [Member] | Financial Asset, Not Past Due | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 505,333 | 434,939
Total consumer real estate loans [Member] | Financial Asset, Not Past Due | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 10,808 | 16,104
Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 477,369 | 505,680
Consumer Loan [Member] | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 372,225 | 390,060
Consumer Loan [Member] | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 26,318 | 29,277
Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,185 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 325 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 1,943 | 727
Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,076 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 34 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 449 | 21
Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 5,261 | 6,788
Consumer Loan [Member] | Financial Asset, Past Due | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 359 | 3,269
Consumer Loan [Member] | Financial Asset, Past Due | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,392 | 748
Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 472,108 | 498,892
Consumer Loan [Member] | Financial Asset, Not Past Due | Revolving Credit Facility |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 371,866 | 386,791
Consumer Loan [Member] | Financial Asset, Not Past Due | Revolving Loans Converted to Term |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 23,926 | 28,529
2021 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 319,322 |
2021 | Total consumer real estate loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 280 |
2021 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 0 |
2021 | Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 280 |
2021 | Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 319,042 |
2021 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 48,856 |
2021 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,600 |
2021 | Consumer Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 548 |
2021 | Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,148 |
2021 | Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 46,708 |
2020 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 251,364 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 204 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 15
2020 | Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 204 | 240
2020 | Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 251,160 | 336,441
2020 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 17,934 | 47,107
2020 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 91 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 71
2020 | Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 91 | 1,821
2020 | Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 17,843 | 45,286
2019 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 96,306 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 406 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 139
2019 | Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 406 | 1,177
2019 | Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 95,900 | 166,323
2019 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 6,380 | 28,123
2019 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 120 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 45 | 10
2019 | Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 165 | 310
2019 | Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 6,215 | 27,813
2018 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 56,536 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 489 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 154 | 109
2018 | Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 643 | 1,665
2018 | Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 55,893 | 94,374
2018 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 2,722 | 5,968
2018 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 38 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 118
2018 | Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 38 | 571
2018 | Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,684 | 5,397
2017 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 49,492 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 296 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 355 | 706
2017 | Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 651 | 1,259
2017 | Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 48,841 | 80,625
2017 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 1,759 | 2,851
2017 | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 51 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
2017 | Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 51 | 52
2017 | Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,708 | 2,799
2016 | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
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] |  |
Financing Receivable, before Allowance for Credit Loss |  | 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] |  |
Financing Receivable, before Allowance for Credit Loss |  | 25
2016 | Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 653
2016 | Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 66,241
2016 | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
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] |  |
Financing Receivable, before Allowance for Credit Loss |  | 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] |  |
Financing Receivable, before Allowance for Credit Loss |  | 0
2016 | Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 17
2016 | Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 1,705
Prior Years | Total consumer real estate loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 118,595 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 1,344 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 828 | 1,287
Prior Years | Total consumer real estate loans [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,172 | 4,194
Prior Years | Total consumer real estate loans [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 116,423 | 124,590
Prior Years | Consumer Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned discounts | 1,175 | 572
Prior Years | Consumer Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 17 | 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] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Prior Years | Consumer Loan [Member] | Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 17 | 0
Prior Years | Consumer Loan [Member] | Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 1,158 | $ 572

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