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Loans and Leases and the Allowance for Credit Losses - Summary of loans in Accrual and Nonaccrual Status (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due $ 1,656,111 $ 1,656,111 $ 1,779,054
Accruing Loans Past Due 90 Days or More 380,079 380,079 491,018
Nonaccrual 2,435,581 2,435,581 2,438,435
Loans and leases, net of unearned discount 133,343,729 133,343,729 131,564,163
Gross charge-offs 162,224 257,163  
Revolving Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 27,577,066 27,577,066 26,197,545
Gross charge-offs 344 3,941  
Revolving Loans Converted to Term Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 1,638,001 1,638,001 1,664,096
Gross charge-offs 1,113 1,817  
Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 581,806 581,806 595,897
Accruing Loans Past Due 90 Days or More 284,410 284,410 345,402
Nonaccrual 238,509 238,509 272,090
Loans and leases, net of unearned discount 22,771,049 22,771,049 22,704,895
Gross charge-offs 845 2,410  
Residential [Member] | Revolving Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 87 87 499
Nonaccrual 6,679 6,679 7,353
Loans and leases, net of unearned discount 87,069 87,069 38,292
Residential Limited Documentation [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 23,945 23,945 22,456
Nonaccrual 66,614 66,614 77,814
Loans and leases, net of unearned discount 991,168 991,168 1,051,052
Gross charge-offs 227 363  
Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 4,669,522 4,669,522  
30-89 Days Past Due 26,478 26,478 30,787
Nonaccrual 77,090 77,090 84,788
Loans and leases, net of unearned discount 4,773,090 4,773,090 5,006,886
Gross charge-offs 1,166 3,199  
Home Equity Lines and Loans [Member] | Revolving Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 3,082,721 3,082,721  
Nonaccrual 1,140 1,140 2,799
Loans and leases, net of unearned discount 3,083,861 3,083,861 3,265,332
Gross charge-offs   1,298  
Home Equity Lines and Loans [Member] | Revolving Loans Converted to Term Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,459,491 1,459,491  
30-89 Days Past Due 24,444 24,444 28,460
Nonaccrual 69,555 69,555 74,646
Loans and leases, net of unearned discount 1,553,490 1,553,490 1,590,440
Gross charge-offs 1,113 1,817  
Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 9,171,034 9,171,034  
30-89 Days Past Due 53,483 53,483 54,593
Nonaccrual 32,286 32,286 44,630
Loans and leases, net of unearned discount 9,256,803 9,256,803 9,073,394
Gross charge-offs 14,480 29,301  
Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 4,020,722 4,020,722  
30-89 Days Past Due 40,974 40,974 44,486
Nonaccrual 21,791 21,791 39,584
Loans and leases, net of unearned discount 4,083,487 4,083,487 4,477,276
Gross charge-offs 4,931 11,642  
Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 2,062,277 2,062,277  
30-89 Days Past Due 15,769 15,769 22,961
Accruing Loans Past Due 90 Days or More 4,964 4,964 4,869
Nonaccrual 52,862 52,862 49,497
Loans and leases, net of unearned discount 2,135,872 2,135,872 2,035,523
Gross charge-offs 17,728 38,014  
Other [Member] | Revolving Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,444,863 1,444,863  
30-89 Days Past Due 8,979 8,979 15,655
Accruing Loans Past Due 90 Days or More 4,783 4,783 4,643
Nonaccrual 49,565 49,565 44,449
Loans and leases, net of unearned discount 1,508,190 1,508,190 1,439,796
Gross charge-offs 172 192  
Other [Member] | Revolving Loans Converted to Term Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 5,448 5,448  
30-89 Days Past Due 530 530 651
Nonaccrual 156 156 185
Loans and leases, net of unearned discount 6,134 6,134 9,057
Current [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 128,871,958 128,871,958 126,855,656
Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 21,666,324 21,666,324 21,491,506
Current [Member] | Residential [Member] | Revolving Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 80,303 80,303 30,440
Current [Member] | Residential Limited Documentation [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 900,609 900,609 950,782
Current [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 4,669,522 4,669,522 4,891,311
Current [Member] | Home Equity Lines and Loans [Member] | Revolving Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     3,262,533
Current [Member] | Home Equity Lines and Loans [Member] | Revolving Loans Converted to Term Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     1,487,334
Current [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 9,171,034 9,171,034 8,974,171
Current [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 4,020,722 4,020,722 4,393,206
Current [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 2,062,277 2,062,277 1,958,196
Current [Member] | Other [Member] | Revolving Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     1,375,049
Current [Member] | Other [Member] | Revolving Loans Converted to Term Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     8,221
Term Loans 2023 [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 9,682,358 9,682,358  
Gross charge-offs 6,883 7,902  
Term Loans 2023 [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 4,818 4,818  
Accruing Loans Past Due 90 Days or More 170 170  
Nonaccrual 140 140  
Loans and leases, net of unearned discount 1,083,740 1,083,740  
Term Loans 2023 [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 32 32  
Loans and leases, net of unearned discount 32 32  
Term Loans 2023 [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,111,625 1,111,625  
30-89 Days Past Due 1,345 1,345  
Nonaccrual 554 554  
Loans and leases, net of unearned discount 1,113,524 1,113,524  
Gross charge-offs 873 873  
Term Loans 2023 [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 442,880 442,880  
30-89 Days Past Due 1,731 1,731  
Nonaccrual 648 648  
Loans and leases, net of unearned discount 445,259 445,259  
Gross charge-offs 81 81  
Term Loans 2023 [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 154,995 154,995  
30-89 Days Past Due 2,113 2,113  
Nonaccrual 1,434 1,434  
Loans and leases, net of unearned discount 158,542 158,542  
Gross charge-offs 5,201 6,113  
Term Loans 2023 [Member] | Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,078,612 1,078,612  
Term Loans 2022 [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 23,151,528 23,151,528 24,853,925
Gross charge-offs 14,079 30,920  
Term Loans 2022 [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 77,407 77,407 59,477
Accruing Loans Past Due 90 Days or More 24,637 24,637 12,012
Nonaccrual 12,497 12,497 5,686
Loans and leases, net of unearned discount 5,031,169 5,031,169 5,148,554
Gross charge-offs 58 133  
Term Loans 2022 [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 31 31  
Loans and leases, net of unearned discount 31 31 930
Term Loans 2022 [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 2,572,098 2,572,098  
30-89 Days Past Due 9,290 9,290 8,648
Nonaccrual 2,977 2,977 3,533
Loans and leases, net of unearned discount 2,584,365 2,584,365 2,854,272
Gross charge-offs 2,781 5,150  
Term Loans 2022 [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,298,446 1,298,446  
30-89 Days Past Due 9,576 9,576 6,926
Nonaccrual 2,521 2,521 2,493
Loans and leases, net of unearned discount 1,310,543 1,310,543 1,500,495
Gross charge-offs 1,183 2,819  
Term Loans 2022 [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 222,468 222,468  
30-89 Days Past Due 1,885 1,885 3,783
Nonaccrual 665 665 2,745
Loans and leases, net of unearned discount 225,018 225,018 281,058
Gross charge-offs 3,203 11,860  
Term Loans 2022 [Member] | Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 4,916,628 4,916,628 5,071,379
Term Loans 2022 [Member] | Current [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     930
Term Loans 2022 [Member] | Current [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     2,842,091
Term Loans 2022 [Member] | Current [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     1,491,076
Term Loans 2022 [Member] | Current [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     274,530
Term Loans 2021 [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 17,136,736 17,136,736 18,747,757
Gross charge-offs 11,973 23,309  
Term Loans 2021 [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 49,908 49,908 51,308
Accruing Loans Past Due 90 Days or More 26,574 26,574 39,934
Nonaccrual 14,259 14,259 10,865
Loans and leases, net of unearned discount 3,995,065 3,995,065 4,103,759
Gross charge-offs 77 192  
Term Loans 2021 [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,962 1,962  
Nonaccrual 32 32 15
Loans and leases, net of unearned discount 1,994 1,994 2,124
Term Loans 2021 [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 2,047,511 2,047,511  
30-89 Days Past Due 12,008 12,008 9,525
Nonaccrual 6,984 6,984 7,440
Loans and leases, net of unearned discount 2,066,503 2,066,503 2,297,592
Gross charge-offs 3,014 6,027  
Term Loans 2021 [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,285,910 1,285,910  
30-89 Days Past Due 12,148 12,148 13,324
Nonaccrual 7,163 7,163 10,698
Loans and leases, net of unearned discount 1,305,221 1,305,221 1,581,698
Gross charge-offs 1,916 3,984  
Term Loans 2021 [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 142,584 142,584  
30-89 Days Past Due 1,304 1,304 1,450
Nonaccrual 445 445 830
Loans and leases, net of unearned discount 144,333 144,333 174,518
Gross charge-offs 2,261 4,996  
Term Loans 2021 [Member] | Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 3,904,324 3,904,324 4,001,652
Term Loans 2021 [Member] | Current [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     2,109
Term Loans 2021 [Member] | Current [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     2,280,627
Term Loans 2021 [Member] | Current [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     1,557,676
Term Loans 2021 [Member] | Current [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     172,238
Term Loans 2020 [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 11,904,481 11,904,481 13,072,920
Gross charge-offs 9,086 17,409  
Term Loans 2020 [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 33,051 33,051 40,337
Accruing Loans Past Due 90 Days or More 16,174 16,174 20,067
Nonaccrual 2,286 2,286 2,583
Loans and leases, net of unearned discount 2,715,220 2,715,220 2,780,358
Gross charge-offs   21  
Term Loans 2020 [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 2,164 2,164  
30-89 Days Past Due 55 55  
Loans and leases, net of unearned discount 2,219 2,219 2,441
Term Loans 2020 [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,420,955 1,420,955  
30-89 Days Past Due 10,542 10,542 12,412
Nonaccrual 5,775 5,775 9,427
Loans and leases, net of unearned discount 1,437,272 1,437,272 1,609,468
Gross charge-offs 2,746 5,731  
Term Loans 2020 [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 553,840 553,840  
30-89 Days Past Due 6,187 6,187 7,284
Nonaccrual 3,988 3,988 7,372
Loans and leases, net of unearned discount 564,015 564,015 717,367
Gross charge-offs 708 1,877  
Term Loans 2020 [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 44,462 44,462  
30-89 Days Past Due 235 235 326
Nonaccrual 135 135 332
Loans and leases, net of unearned discount 44,832 44,832 58,997
Gross charge-offs 1,209 2,604  
Term Loans 2020 [Member] | Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 2,663,709 2,663,709 2,717,371
Term Loans 2020 [Member] | Current [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     2,441
Term Loans 2020 [Member] | Current [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     1,587,629
Term Loans 2020 [Member] | Current [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     702,711
Term Loans 2020 [Member] | Current [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     58,339
Term Loans 2019 [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 11,361,552 11,361,552 12,737,602
Gross charge-offs 57,412 91,123  
Term Loans 2019 [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 23,741 23,741 21,849
Accruing Loans Past Due 90 Days or More 13,590 13,590 14,050
Nonaccrual 8,254 8,254 9,860
Loans and leases, net of unearned discount 1,312,134 1,312,134 1,438,625
Gross charge-offs 71 139  
Term Loans 2019 [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 14,100 14,100  
30-89 Days Past Due 309 309 171
Nonaccrual 65 65 536
Loans and leases, net of unearned discount 14,474 14,474 16,068
Term Loans 2019 [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 866,786 866,786  
30-89 Days Past Due 7,690 7,690 8,387
Nonaccrual 4,706 4,706 7,625
Loans and leases, net of unearned discount 879,182 879,182 979,919
Gross charge-offs 1,751 4,163  
Term Loans 2019 [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 280,257 280,257  
30-89 Days Past Due 5,479 5,479 7,239
Nonaccrual 3,299 3,299 7,520
Loans and leases, net of unearned discount 289,035 289,035 393,721
Gross charge-offs 526 1,483  
Term Loans 2019 [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 25,013 25,013  
30-89 Days Past Due 221 221 386
Nonaccrual 127 127 371
Loans and leases, net of unearned discount 25,361 25,361 39,196
Gross charge-offs 1,334 2,915  
Term Loans 2019 [Member] | Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,266,549 1,266,549 1,392,866
Term Loans 2019 [Member] | Current [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     15,361
Term Loans 2019 [Member] | Current [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     963,907
Term Loans 2019 [Member] | Current [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     378,962
Term Loans 2019 [Member] | Current [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     38,439
Term Loans 2018 [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount     7,534,367
Term Loans 2018 [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due     23,126
Accruing Loans Past Due 90 Days or More     14,007
Nonaccrual     4,650
Loans and leases, net of unearned discount     795,691
Term Loans 2018 [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due     126
Nonaccrual     334
Loans and leases, net of unearned discount     23,781
Term Loans 2018 [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due     5,202
Nonaccrual     5,344
Loans and leases, net of unearned discount     497,510
Term Loans 2018 [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due     5,464
Nonaccrual     5,620
Loans and leases, net of unearned discount     178,522
Term Loans 2018 [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due     141
Nonaccrual     120
Loans and leases, net of unearned discount     8,478
Term Loans 2018 [Member] | Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     753,908
Term Loans 2018 [Member] | Current [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     23,321
Term Loans 2018 [Member] | Current [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     486,964
Term Loans 2018 [Member] | Current [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     167,438
Term Loans 2018 [Member] | Current [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     8,217
Term Loans Prior Period [Member]      
Financing Receivable Recorded Investment [Line Items]      
Loans and leases, net of unearned discount 30,892,007 30,892,007 26,755,951
Gross charge-offs 61,334 80,742  
Term Loans Prior Period [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 392,794 392,794 399,301
Accruing Loans Past Due 90 Days or More 203,265 203,265 245,332
Nonaccrual 194,394 194,394 231,093
Loans and leases, net of unearned discount 8,546,652 8,546,652 8,399,616
Gross charge-offs 639 1,925  
Term Loans Prior Period [Member] | Residential Limited Documentation [Member]      
Financing Receivable Recorded Investment [Line Items]      
30-89 Days Past Due 23,945 23,945 22,456
Nonaccrual 66,614 66,614 77,814
Loans and leases, net of unearned discount 991,168 991,168 1,051,052
Gross charge-offs 227 363  
Term Loans Prior Period [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 109,021 109,021  
30-89 Days Past Due 1,670 1,670 2,030
Nonaccrual 6,298 6,298 6,458
Loans and leases, net of unearned discount 116,989 116,989 105,770
Gross charge-offs 53 84  
Term Loans Prior Period [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 1,152,059 1,152,059  
30-89 Days Past Due 12,608 12,608 10,419
Nonaccrual 11,290 11,290 11,261
Loans and leases, net of unearned discount 1,175,957 1,175,957 834,633
Gross charge-offs 3,315 7,357  
Term Loans Prior Period [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 159,389 159,389  
30-89 Days Past Due 5,853 5,853 4,249
Nonaccrual 4,172 4,172 5,881
Loans and leases, net of unearned discount 169,414 169,414 105,473
Gross charge-offs 517 1,398  
Term Loans Prior Period [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 22,444 22,444  
30-89 Days Past Due 502 502 569
Accruing Loans Past Due 90 Days or More 181 181 226
Nonaccrual 335 335 465
Loans and leases, net of unearned discount 23,462 23,462 24,423
Gross charge-offs 4,348 9,334  
Term Loans Prior Period [Member] | Current [Member] | Residential [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans 7,756,199 7,756,199 7,523,890
Term Loans Prior Period [Member] | Current [Member] | Residential Limited Documentation [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans $ 900,609 $ 900,609 950,782
Term Loans Prior Period [Member] | Current [Member] | Home Equity Lines and Loans [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     97,282
Term Loans Prior Period [Member] | Current [Member] | Recreational Finance [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     812,953
Term Loans Prior Period [Member] | Current [Member] | Automobile [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     95,343
Term Loans Prior Period [Member] | Current [Member] | Other [Member]      
Financing Receivable Recorded Investment [Line Items]      
Total loans     $ 23,163