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Portfolio Loans - Schedule of allowance for loan losses and recorded investments in portfolio loans, by category (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | ---
Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | $ 7,655,608 |  | $ 7,173,618 |  |  |
Individually Evaluated for Impairment | 14,506 |  | 15,380 |  |  |
Total | 7,670,114 |  | 7,188,998 |  |  |
ACL Attributed to Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 85,891 |  | 84,298 |  |  |
Individually Evaluated for Impairment | 4,831 |  | 3,589 |  |  |
Total | 90,722 | $ 88,757 | 87,887 | $ 92,802 | $ 95,410 | $ 101,048
Commercial |  |  |  |  |  |
Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 1,939,454 |  | 1,936,898 |  |  |
Individually Evaluated for Impairment | 6,439 |  | 6,988 |  |  |
Total | 1,945,893 |  | 1,943,886 |  |  |
ACL Attributed to Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 20,889 |  | 20,291 |  |  |
Individually Evaluated for Impairment | 2,806 |  | 3,564 |  |  |
Total | 23,695 | 23,359 | 23,855 | 24,406 | 24,356 | 23,866
Commercial real estate |  |  |  |  |  |
Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 3,272,986 |  | 3,114,057 |  |  |
Individually Evaluated for Impairment | 5,698 |  | 5,750 |  |  |
Total | 3,278,684 |  | 3,119,807 |  |  |
ACL Attributed to Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 35,799 |  | 38,249 |  |  |
Individually Evaluated for Impairment | 2,000 |  | 0 |  |  |
Total | 37,799 | 37,182 | 38,249 | 39,831 | 39,974 | 46,230
Real estate construction |  |  |  |  |  |
Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 499,305 |  | 385,724 |  |  |
Individually Evaluated for Impairment | 255 |  | 272 |  |  |
Total | 499,560 |  | 385,996 |  |  |
ACL Attributed to Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 5,971 |  | 5,102 |  |  |
Individually Evaluated for Impairment | 0 |  | 0 |  |  |
Total | 5,971 | 5,669 | 5,102 | 6,121 | 7,599 | 8,193
Retail real estate |  |  |  |  |  |
Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 1,640,985 |  | 1,510,606 |  |  |
Individually Evaluated for Impairment | 2,114 |  | 2,370 |  |  |
Total | 1,643,099 |  | 1,512,976 |  |  |
ACL Attributed to Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 18,595 |  | 17,564 |  |  |
Individually Evaluated for Impairment | 25 |  | 25 |  |  |
Total | 18,620 | 17,984 | 17,589 | 19,352 | 20,505 | 21,992
Retail other |  |  |  |  |  |
Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 302,878 |  | 226,333 |  |  |
Individually Evaluated for Impairment | 0 |  | 0 |  |  |
Total | 302,878 |  | 226,333 |  |  |
ACL Attributed to Portfolio Loans |  |  |  |  |  |
Collectively Evaluated for Impairment | 4,637 |  | 3,092 |  |  |
Individually Evaluated for Impairment | 0 |  | 0 |  |  |
Total | $ 4,637 | $ 4,563 | $ 3,092 | $ 3,092 | $ 2,976 | $ 767

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