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Portfolio Loans - Summary of risk grades segregated by category of portfolio loans (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | $ 7,670,114 | $ 7,188,998
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 7,000,893 | 6,518,101
Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 465,504 | 463,053
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 103,006 | 121,120
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 85,286 | 70,778
Substandard Non-accrual |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 15,425 | 15,946
Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 1,945,893 | 1,943,886
Commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 1,707,528 | 1,747,756
Commercial | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 135,254 | 93,582
Commercial | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 58,189 | 69,427
Commercial | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 38,695 | 26,117
Commercial | Substandard Non-accrual |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 6,227 | 7,004
Commercial real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 3,278,684 | 3,119,807
Commercial real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 2,889,804 | 2,682,441
Commercial real estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 299,638 | 343,304
Commercial real estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 42,728 | 49,695
Commercial real estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 40,722 | 38,394
Commercial real estate | Substandard Non-accrual |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 5,792 | 5,973
Real estate construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 499,560 | 385,996
Real estate construction | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 475,099 | 369,797
Real estate construction | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 22,011 | 13,793
Real estate construction | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 2 | 6
Real estate construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 2,400 | 2,400
Real estate construction | Substandard Non-accrual |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 48 | 0
Retail real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 1,643,099 | 1,512,976
Retail real estate | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 1,625,702 | 1,491,845
Retail real estate | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 8,601 | 12,374
Retail real estate | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 2,087 | 1,992
Retail real estate | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 3,469 | 3,867
Retail real estate | Substandard Non-accrual |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 3,240 | 2,898
Retail other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 302,878 | 226,333
Retail other | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 302,760 | 226,262
Retail other | Watch |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 0 | 0
Retail other | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 0 | 0
Retail other | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | 0 | 0
Retail other | Substandard Non-accrual |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Portfolio loans | $ 118 | $ 71

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