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Loans and Allowance for Credit Losses on Loans - Aging of Past Due Loans by Class of Loans (Details) - USD ($) | Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
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Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | $ 6,229,000 |  | $ 15,315,000
Current | 2,619,758,000 |  | 2,518,848,000
Total loan balance | 2,625,987,000 | $ 31,855,000 | 2,534,163,000
30-59 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 4,657,000 |  | 4,770,000
60-89 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 744,000 |  | 2,234,000
90 Days or Greater Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 828,000 |  | 8,311,000
Commercial |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total loan balance |  |  | 603,345,000
Real estate |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total loan balance |  |  | 1,897,074,000
Consumer |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total loan balance |  |  | 33,744,000
Commercial |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 10,084,000
Current |  |  | 593,261,000
Total loan balance | 846,386,000 | 6,790,000 | 603,345,000
Commercial | 30-59 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 4,770,000
Commercial | 60-89 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 2,097,000
Commercial | 90 Days or Greater Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 3,217,000
Commercial | Commercial |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 4,175,000 |  |
Current | 842,211,000 |  |
Total loan balance | 846,386,000 |  | 603,345,000
Commercial | Commercial | 30-59 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 3,524,000 |  |
Commercial | Commercial | 60-89 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 259,000 |  |
Commercial | Commercial | 90 Days or Greater Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 392,000 |  |
CRE - owner occupied |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 5,094,000
Current |  |  | 543,813,000
Total loan balance | 560,362,000 | 6,994,000 | 548,907,000
CRE - owner occupied | 90 Days or Greater Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 5,094,000
CRE - owner occupied | Real estate |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 1,162,000 |  |
Current | 559,200,000 |  |
Total loan balance | 560,362,000 |  | 548,907,000
CRE - owner occupied | Real estate | 30-59 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 1,133,000 |  |
CRE - owner occupied | Real estate | 90 Days or Greater Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 29,000 |  |
CRE - non-owner occupied |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current |  |  | 767,821,000
Total loan balance | 693,103,000 | 11,672,000 | 767,821,000
CRE - non-owner occupied | Real estate |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 485,000 |  |
Current | 692,618,000 |  |
Total loan balance | 693,103,000 |  | 767,821,000
CRE - non-owner occupied | Real estate | 60-89 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 485,000 |  |
Land and construction |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current |  |  | 147,189,000
Total loan balance | 144,594,000 | 1,458,000 | 147,189,000
Land and construction | Real estate |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current | 144,594,000 |  |
Total loan balance | 144,594,000 |  | 147,189,000
Home equity |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 137,000
Current |  |  | 151,638,000
Total loan balance | 111,885,000 | 1,321,000 | 151,775,000
Home equity | 60-89 Days Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due |  |  | 137,000
Home equity | Real estate |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current | 111,885,000 |  |
Total loan balance | 111,885,000 |  | 151,775,000
Multi-family |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current |  |  | 180,623,000
Total loan balance | 166,425,000 | 1,253,000 | 180,623,000
Multi-family | Real estate |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current | 166,425,000 |  |
Total loan balance | 166,425,000 |  | 180,623,000
Residential mortgages |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current |  |  | 100,759,000
Total loan balance | 85,116,000 | 678,000 | 100,759,000
Residential mortgages | Real estate |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current | 85,116,000 |  |
Total loan balance | 85,116,000 |  | 100,759,000
Consumer and other |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Current |  |  | 33,744,000
Total loan balance | 18,116,000 | $ 1,689,000 | 33,744,000
Consumer and other | Consumer |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | 407,000 |  |
Current | 17,709,000 |  |
Total loan balance | 18,116,000 |  | $ 33,744,000
Consumer and other | Consumer | 90 Days or Greater Past Due |  |  |
Aging of Past Due Loans by Class of Loans |  |  |
Total Past Due | $ 407,000 |  |

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