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Loans and Allowance for Credit Losses - Financing receivable credit quality indicators (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | --- | ---
Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators | $ 14,047 | $ 13,625 | $ 5,987 | $ 2,077 | $ 1,025
Prior to 2017 | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 740 |  |  |
Revolving Credit Facility | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 42,089 |  |  |
Total Credit Quality Indicator for Years | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 79,590 |  |  |
Purchase Credit Deteriorated | Pass | Construction Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators | 54,966 | 50,216 | 7,812 |  |
Purchase Credit Deteriorated | Substandard | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators | 51 | 15 |  | 37 |
Purchase Credit Deteriorated | Substandard | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators | 136 | 1,574 | 1,575 | 10 | 180
Purchase Credit Deteriorated | Residential real estate loans | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators | 4,714 | 145 | 226 | 54 | 57
Purchase Credit Deteriorated | Commercial Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators | 168,801 | 213,746 | 139,209 | 145,565 | 95,740
Purchase Credit Deteriorated | Commercial Real Estate | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators | 158,927 | 198,979 | 128,221 | 138,403 | 81,442
Purchase Credit Deteriorated | Commercial Real Estate | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators | 4,025 | 10,580 | 9,541 | 7,028 | 14,245
Purchase Credit Deteriorated | Commercial Real Estate | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators | 5,849 | 4,187 | 559 | 134 | 53
Purchase Credit Deteriorated | Commercial Real Estate | Doubtful |  |  |  |  |
Financing Receivable Credit Quality Indicators |  |  | 888 |  |
Purchase Credit Deteriorated | Prior to 2017 | Substandard | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 7 |  |  |
Purchase Credit Deteriorated | Prior to 2017 | Substandard | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 5 |  |  |
Purchase Credit Deteriorated | Prior to 2017 | Residential real estate loans | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 913 |  |  |
Purchase Credit Deteriorated | Prior to 2017 | Residential real estate loans | Doubtful |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 32 |  |  |
Purchase Credit Deteriorated | Prior to 2017 | Commercial Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 107,595 |  |  |
Purchase Credit Deteriorated | Prior to 2017 | Commercial Real Estate | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 106,507 |  |  |
Purchase Credit Deteriorated | Prior to 2017 | Commercial Real Estate | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 43 |  |  |
Purchase Credit Deteriorated | Prior to 2017 | Commercial Real Estate | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 1,045 |  |  |
Purchase Credit Deteriorated | Revolving Credit Facility | Substandard | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 99 |  |  |
Purchase Credit Deteriorated | Revolving Credit Facility | Substandard | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 2,275 |  |  |
Purchase Credit Deteriorated | Revolving Credit Facility | Commercial Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 31,908 |  |  |
Purchase Credit Deteriorated | Revolving Credit Facility | Commercial Real Estate | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 31,017 |  |  |
Purchase Credit Deteriorated | Revolving Credit Facility | Commercial Real Estate | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 891 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Pass | Construction Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 112,994 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Substandard | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 209 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Substandard | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 5,755 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Residential real estate loans | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 6,109 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Residential real estate loans | Doubtful |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 32 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Commercial Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 902,564 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Commercial Real Estate | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 843,496 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Commercial Real Estate | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 46,353 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Commercial Real Estate | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 11,827 |  |  |
Purchase Credit Deteriorated | Total Credit Quality Indicator for Years | Commercial Real Estate | Doubtful |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 888 |  |  |
Total Loans |  |  |  |  |
Financing Receivable Credit Quality Indicators | 511,086 | 650,794 | 238,966 | 202,683 | 137,926
Total Loans | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators | 90,889 | 155,702 | 28,382 | 11,058 | 9,649
Total Loans | Construction Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators | 54,966 | 50,216 | 7,812 |  |
Total Loans | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators | 495,178 | 634,048 | 215,116 | 195,420 | 123,295
Total Loans | Pass | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators | 13,996 | 13,610 | 5,987 | 2,040 | 1,025
Total Loans | Pass | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators | 89,745 | 154,004 | 26,743 | 11,048 | 9,469
Total Loans | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators | 5,158 | 10,825 | 20,602 | 7,028 | 14,341
Total Loans | Watch | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators | 1,008 | 124 | 64 |  |
Total Loans | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators | 10,750 | 5,921 | 2,360 | 235 | 290
Total Loans | Doubtful |  |  |  |  |
Financing Receivable Credit Quality Indicators |  |  | 888 |  |
Total Loans | Residential real estate loans |  |  |  |  |
Financing Receivable Credit Quality Indicators | 182,383 | 217,505 | 57,576 | 43,983 | 31,512
Total Loans | Residential real estate loans | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators | 177,544 | 217,239 | 46,353 | $ 43,929 | 31,359
Total Loans | Residential real estate loans | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators | $ 125 | 121 | $ 10,997 |  | $ 96
Total Loans | Prior to 2017 |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 218,582 |  |  |
Total Loans | Prior to 2017 | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 11,672 |  |  |
Total Loans | Prior to 2017 | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 215,712 |  |  |
Total Loans | Prior to 2017 | Pass | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 733 |  |  |
Total Loans | Prior to 2017 | Pass | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 11,667 |  |  |
Total Loans | Prior to 2017 | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 868 |  |  |
Total Loans | Prior to 2017 | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 1,970 |  |  |
Total Loans | Prior to 2017 | Doubtful |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 32 |  |  |
Total Loans | Prior to 2017 | Residential real estate loans |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 98,575 |  |  |
Total Loans | Prior to 2017 | Residential real estate loans | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 96,805 |  |  |
Total Loans | Prior to 2017 | Residential real estate loans | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 825 |  |  |
Total Loans | Revolving Credit Facility |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 199,146 |  |  |
Total Loans | Revolving Credit Facility | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 119,993 |  |  |
Total Loans | Revolving Credit Facility | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 194,812 |  |  |
Total Loans | Revolving Credit Facility | Pass | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 41,990 |  |  |
Total Loans | Revolving Credit Facility | Pass | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 116,649 |  |  |
Total Loans | Revolving Credit Facility | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 1,960 |  |  |
Total Loans | Revolving Credit Facility | Watch | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 1,069 |  |  |
Total Loans | Revolving Credit Facility | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 2,374 |  |  |
Total Loans | Revolving Credit Facility | Residential real estate loans |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 5,156 |  |  |
Total Loans | Revolving Credit Facility | Residential real estate loans | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 5,156 |  |  |
Total Loans | Total Credit Quality Indicator for Years |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 2,159,183 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 427,345 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Construction Real Estate |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 112,994 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 2,073,581 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Pass | Consumer Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 79,381 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Pass | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 419,325 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 60,782 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Watch | Commercial Loan |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 2,265 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Substandard |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 23,900 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Doubtful |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 920 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Residential real estate loans |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 636,690 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Residential real estate loans | Pass |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | 618,385 |  |  |
Total Loans | Total Credit Quality Indicator for Years | Residential real estate loans | Watch |  |  |  |  |
Financing Receivable Credit Quality Indicators |  | $ 12,164 |  |  |

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