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Portfolio loans - Loans identified as impaired, segregated by category (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Loans identified as impaired |  |
Unpaid Contractual Principal Balance | $ 28,533 | $ 45,686
Recorded Investment with No Allowance | 17,555 | 29,540
Recorded Investment with Allowance | 4,551 | 7,539
Total Recorded Investment | 22,106 | 37,079
Related Allowance | 2,208 | 4,853
Average Recorded Investment | 34,733 | 45,370
Collateral dependent loans secured by real estate or business assets | 17,300 |
Commercial Loans |  |
Loans identified as impaired |  |
Unpaid Contractual Principal Balance | 11,739 | 14,415
Recorded Investment with No Allowance | 3,186 | 4,727
Recorded Investment with Allowance | 3,077 | 5,026
Total Recorded Investment | 6,263 | 9,753
Related Allowance | 1,248 | 3,330
Average Recorded Investment | 9,467 | 13,774
Commercial Real Estate Loans |  |
Loans identified as impaired |  |
Unpaid Contractual Principal Balance | 10,847 | 14,487
Recorded Investment with No Allowance | 9,105 | 9,883
Recorded Investment with Allowance | 1,000 | 2,039
Total Recorded Investment | 10,105 | 11,922
Related Allowance | 486 | 1,049
Average Recorded Investment | 13,583 | 16,678
Real Estate Construction |  |
Loans identified as impaired |  |
Unpaid Contractual Principal Balance | 576 | 1,116
Recorded Investment with No Allowance | 559 | 974
Total Recorded Investment | 559 | 974
Average Recorded Investment | 836 | 873
Retail Real Estate |  |
Loans identified as impaired |  |
Unpaid Contractual Principal Balance | 5,371 | 15,581
Recorded Investment with No Allowance | 4,705 | 13,898
Recorded Investment with Allowance | 474 | 474
Total Recorded Investment | 5,179 | 14,372
Related Allowance | 474 | 474
Average Recorded Investment | 10,817 | 14,003
Retail Other |  |
Loans identified as impaired |  |
Unpaid Contractual Principal Balance |  | 87
Recorded Investment with No Allowance |  | 58
Total Recorded Investment |  | 58
Average Recorded Investment | $ 30 | $ 42

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