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Loan and Lease Financings (Details 2) | 12 Months Ended |
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Dec. 31, 2020 USD ($) method class | Dec. 31, 2019 USD ($)
Receivables [Abstract] |  |
Number of methods to assess credit risk | method | 2 |
Loan and Lease Financings |  |
Amortized cost of loans and leases | $ 5,489,301,000 | $ 5,085,527,000
Number of domestic aircraft loan pools | class | 2 |
Commercial and agricultural |  |
Loan and Lease Financings |  |
2020 | $ 673,693,000 |
2019 | 195,254,000 |
2018 | 139,137,000 |
2017 | 96,423,000 |
2016 | 27,234,000 |
Prior | 21,924,000 |
Revolving Loans | 325,057,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | $ 1,478,722,000 | 1,132,791,000
Commercial and agricultural | Minimum |  |
Loan and Lease Financings |  |
Expected life of underlying collateral | 3 years |
Commercial and agricultural | Maximum |  |
Loan and Lease Financings |  |
Expected life of underlying collateral | 7 years |
Auto and light truck |  |
Loan and Lease Financings |  |
2020 | $ 268,045,000 |
2019 | 168,977,000 |
2018 | 65,545,000 |
2017 | 32,713,000 |
2016 | 6,460,000 |
Prior | 629,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | $ 542,369,000 | 588,807,000
Auto and light truck | Minimum |  |
Loan and Lease Financings |  |
Loan amortization period | 18 months |
Direct finance lease term | 3 years |
Auto and light truck | Maximum |  |
Loan and Lease Financings |  |
Loan amortization period | 4 years |
Direct finance lease term | 7 years |
Medium and heavy duty truck |  |
Loan and Lease Financings |  |
2020 | $ 92,698,000 |
2019 | 89,292,000 |
2018 | 44,205,000 |
2017 | 31,773,000 |
2016 | 16,276,000 |
Prior | 4,928,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | $ 279,172,000 | 294,824,000
Medium and heavy duty truck | Minimum |  |
Loan and Lease Financings |  |
Period of amortization to reach equity position in collateral | 3 years |
Medium and heavy duty truck | Maximum |  |
Loan and Lease Financings |  |
Period of amortization to reach equity position in collateral | 4 years |
Aircraft |  |
Loan and Lease Financings |  |
2020 | $ 440,802,000 |
2019 | 155,919,000 |
2018 | 93,521,000 |
2017 | 96,053,000 |
2016 | 46,159,000 |
Prior | 22,636,000 |
Revolving Loans | 6,370,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | $ 861,460,000 |
Aircraft | Minimum |  |
Loan and Lease Financings |  |
Loan amortization period | 10 years |
Aircraft | Maximum |  |
Loan and Lease Financings |  |
Loan amortization period | 15 years |
Construction equipment |  |
Loan and Lease Financings |  |
2020 | $ 328,692,000 |
2019 | 194,293,000 |
2018 | 106,962,000 |
2017 | 43,111,000 |
2016 | 12,861,000 |
Prior | 5,807,000 |
Revolving Loans | 20,490,000 |
Revolving Loans Converted to Term | 2,672,000 |
Amortized cost of loans and leases | 714,888,000 | 705,451,000
Commercial real estate |  |
Loan and Lease Financings |  |
2020 | 200,243,000 |
2019 | 212,467,000 |
2018 | 179,020,000 |
2017 | 181,693,000 |
2016 | 70,784,000 |
Prior | 125,284,000 |
Revolving Loans | 373,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 969,864,000 | 908,177,000
Residential real estate and home equity |  |
Loan and Lease Financings |  |
2020 | 133,829,000 |
2019 | 65,690,000 |
2018 | 18,215,000 |
2017 | 22,943,000 |
2016 | 41,847,000 |
Prior | 87,541,000 |
Revolving Loans | 135,502,000 |
Revolving Loans Converted to Term | 5,812,000 |
Amortized cost of loans and leases | 511,379,000 | 532,003,000
Consumer |  |
Loan and Lease Financings |  |
2020 | 43,826,000 |
2019 | 34,508,000 |
2018 | 18,982,000 |
2017 | 7,041,000 |
2016 | 2,267,000 |
Prior | 795,000 |
Revolving Loans | 24,028,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 131,447,000 | $ 139,434,000
Credit Quality Grades 1-6 | Commercial and agricultural |  |
Loan and Lease Financings |  |
2020 | 666,905,000 |
2019 | 193,555,000 |
2018 | 134,411,000 |
2017 | 92,916,000 |
2016 | 26,034,000 |
Prior | 19,790,000 |
Revolving Loans | 291,990,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 1,425,601,000 |
Credit Quality Grades 1-6 | Auto and light truck |  |
Loan and Lease Financings |  |
2020 | 248,932,000 |
2019 | 141,841,000 |
2018 | 52,749,000 |
2017 | 24,101,000 |
2016 | 4,210,000 |
Prior | 608,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 472,441,000 |
Credit Quality Grades 1-6 | Medium and heavy duty truck |  |
Loan and Lease Financings |  |
2020 | 92,698,000 |
2019 | 88,314,000 |
2018 | 44,205,000 |
2017 | 31,773,000 |
2016 | 15,644,000 |
Prior | 4,840,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 277,474,000 |
Credit Quality Grades 1-6 | Aircraft |  |
Loan and Lease Financings |  |
2020 | 429,283,000 |
2019 | 153,358,000 |
2018 | 93,042,000 |
2017 | 95,457,000 |
2016 | 43,972,000 |
Prior | 20,966,000 |
Revolving Loans | 6,370,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 842,448,000 |
Credit Quality Grades 1-6 | Construction equipment |  |
Loan and Lease Financings |  |
2020 | 311,174,000 |
2019 | 180,550,000 |
2018 | 96,320,000 |
2017 | 42,713,000 |
2016 | 12,624,000 |
Prior | 5,722,000 |
Revolving Loans | 17,502,000 |
Revolving Loans Converted to Term | 737,000 |
Amortized cost of loans and leases | 667,342,000 |
Credit Quality Grades 1-6 | Commercial real estate |  |
Loan and Lease Financings |  |
2020 | 190,725,000 |
2019 | 204,477,000 |
2018 | 173,847,000 |
2017 | 175,009,000 |
2016 | 69,022,000 |
Prior | 122,762,000 |
Revolving Loans | 373,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 936,215,000 |
Credit Quality Grades 7-12 |  |
Loan and Lease Financings |  |
Threshold value of loan or lease for evaluation of the appropriateness of the impairment reserve | 100,000 |
Credit Quality Grades 7-12 | Commercial and agricultural |  |
Loan and Lease Financings |  |
2020 | 6,788,000 |
2019 | 1,699,000 |
2018 | 4,726,000 |
2017 | 3,507,000 |
2016 | 1,200,000 |
Prior | 2,134,000 |
Revolving Loans | 33,067,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 53,121,000 |
Credit Quality Grades 7-12 | Auto and light truck |  |
Loan and Lease Financings |  |
2020 | 19,113,000 |
2019 | 27,136,000 |
2018 | 12,796,000 |
2017 | 8,612,000 |
2016 | 2,250,000 |
Prior | 21,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 69,928,000 |
Credit Quality Grades 7-12 | Medium and heavy duty truck |  |
Loan and Lease Financings |  |
2020 | 0 |
2019 | 978,000 |
2018 | 0 |
2017 | 0 |
2016 | 632,000 |
Prior | 88,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 1,698,000 |
Credit Quality Grades 7-12 | Aircraft |  |
Loan and Lease Financings |  |
2020 | 11,519,000 |
2019 | 2,561,000 |
2018 | 479,000 |
2017 | 596,000 |
2016 | 2,187,000 |
Prior | 1,670,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 19,012,000 |
Credit Quality Grades 7-12 | Construction equipment |  |
Loan and Lease Financings |  |
2020 | 17,518,000 |
2019 | 13,743,000 |
2018 | 10,642,000 |
2017 | 398,000 |
2016 | 237,000 |
Prior | 85,000 |
Revolving Loans | 2,988,000 |
Revolving Loans Converted to Term | 1,935,000 |
Amortized cost of loans and leases | 47,546,000 |
Credit Quality Grades 7-12 | Commercial real estate |  |
Loan and Lease Financings |  |
2020 | 9,518,000 |
2019 | 7,990,000 |
2018 | 5,173,000 |
2017 | 6,684,000 |
2016 | 1,762,000 |
Prior | 2,522,000 |
Revolving Loans | 0 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 33,649,000 |
Performing | Residential real estate and home equity |  |
Loan and Lease Financings |  |
2020 | 133,829,000 |
2019 | 65,690,000 |
2018 | 18,194,000 |
2017 | 22,929,000 |
2016 | 41,847,000 |
Prior | 86,106,000 |
Revolving Loans | 135,255,000 |
Revolving Loans Converted to Term | 5,703,000 |
Amortized cost of loans and leases | 509,553,000 |
Performing | Consumer |  |
Loan and Lease Financings |  |
2020 | 43,824,000 |
2019 | 34,409,000 |
2018 | 18,904,000 |
2017 | 7,005,000 |
2016 | 2,259,000 |
Prior | 793,000 |
Revolving Loans | 23,869,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | 131,063,000 |
Nonperforming | Residential real estate and home equity |  |
Loan and Lease Financings |  |
2020 | 0 |
2019 | 0 |
2018 | 21,000 |
2017 | 14,000 |
2016 | 0 |
Prior | 1,435,000 |
Revolving Loans | 247,000 |
Revolving Loans Converted to Term | 109,000 |
Amortized cost of loans and leases | 1,826,000 |
Nonperforming | Consumer |  |
Loan and Lease Financings |  |
2020 | 2,000 |
2019 | 99,000 |
2018 | 78,000 |
2017 | 36,000 |
2016 | 8,000 |
Prior | 2,000 |
Revolving Loans | 159,000 |
Revolving Loans Converted to Term | 0 |
Amortized cost of loans and leases | $ 384,000 |

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