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Portfolio Loans - Summary of risk grades segregated by category (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Loans |  |
Portfolio loans | $ 6,779,300 | $ 6,814,177
Pass |  |
Loans |  |
Portfolio loans | 5,981,995 | 6,016,748
Watch |  |
Loans |  |
Portfolio loans | 560,431 | 554,970
Special Mention |  |
Loans |  |
Portfolio loans | 149,831 | 150,481
Substandard |  |
Loans |  |
Portfolio loans | 65,337 | 69,048
Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 21,706 | 22,930
Commercial |  |
Loans |  |
Portfolio loans | 2,067,371 | 2,014,576
Commercial | Pass |  |
Loans |  |
Portfolio loans | 1,830,063 | 1,768,755
Commercial | Watch |  |
Loans |  |
Portfolio loans | 123,390 | 136,948
Commercial | Special Mention |  |
Loans |  |
Portfolio loans | 78,546 | 72,447
Commercial | Substandard |  |
Loans |  |
Portfolio loans | 27,423 | 27,903
Commercial | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 7,949 | 8,523
Commercial real estate |  |
Loans |  |
Portfolio loans | 2,912,966 | 2,892,535
Commercial real estate | Pass |  |
Loans |  |
Portfolio loans | 2,400,446 | 2,393,372
Commercial real estate | Watch |  |
Loans |  |
Portfolio loans | 407,244 | 383,277
Commercial real estate | Special Mention |  |
Loans |  |
Portfolio loans | 68,900 | 75,486
Commercial real estate | Substandard |  |
Loans |  |
Portfolio loans | 31,212 | 34,897
Commercial real estate | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 5,164 | 5,503
Real estate construction |  |
Loans |  |
Portfolio loans | 422,633 | 461,786
Real estate construction | Pass |  |
Loans |  |
Portfolio loans | 400,306 | 434,681
Real estate construction | Watch |  |
Loans |  |
Portfolio loans | 19,918 | 24,481
Real estate construction | Special Mention |  |
Loans |  |
Portfolio loans | 9 | 77
Real estate construction | Substandard |  |
Loans |  |
Portfolio loans | 2,400 | 2,546
Real estate construction | Substandard Non-accrual |  |
Loans |  |
Portfolio loans |  | 1
Retail Real Estate |  |
Loans |  |
Portfolio loans | 1,343,299 | 1,407,852
Retail Real Estate | Pass |  |
Loans |  |
Portfolio loans | 1,318,247 | 1,382,616
Retail Real Estate | Watch |  |
Loans |  |
Portfolio loans | 9,879 | 10,264
Retail Real Estate | Special Mention |  |
Loans |  |
Portfolio loans | 2,376 | 2,471
Retail Real Estate | Substandard |  |
Loans |  |
Portfolio loans | 4,302 | 3,702
Retail Real Estate | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 8,495 | 8,799
Retail Other |  |
Loans |  |
Portfolio loans | 33,031 | 37,428
Retail Other | Pass |  |
Loans |  |
Portfolio loans | 32,933 | 37,324
Retail Other | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 98 | 104
Commercial Loans |  |
Loans |  |
Portfolio loans | 2,067,371 | 2,014,576
Commercial Real Estate Loans |  |
Loans |  |
Portfolio loans | 2,912,966 | 2,892,535
Real Estate Construction |  |
Loans |  |
Portfolio loans | 422,633 | 461,786
Retail Real Estate |  |
Loans |  |
Portfolio loans | 1,343,299 | 1,407,852
Retail Other |  |
Loans |  |
Portfolio loans | $ 33,031 | $ 37,428

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