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Loans - Categories (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | $ 2,826,650 | $ 2,919,981 |  |
Net deferred loan origination costs and premiums and discounts on purchased loans and other(1) | 65,443 | 43,566 |  |
Total loans | 2,892,093 | 2,963,547 |  |
Allowance for loan losses | (22,857) | (21,840) | $ (18,841) | $ (17,896)
Net loans | 2,869,236 | 2,941,707 |  |
Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (1,670) | (1,521) | (1,351) | (1,384)
Owner-occupied commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (645) | (561) | (745) | (783)
Investor commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (128) | (109) | (103) | (61)
Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (460) | (380) | (267) | (251)
Single tenant lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (10,755) | (11,175) | (9,368) | (8,827)
Public finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (1,483) | (1,580) | (1,650) | (1,670)
Healthcare finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (4,318) | (3,247) | (1,731) | (1,264)
Small business lending |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (265) | (54) | (195) | (203)
Residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (500) | (657) | (1,044) | (1,079)
Home equity |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (53) | (46) | (49) | (53)
Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (2,580) | (2,510) | $ (2,338) | $ (2,321)
Commercial Portfolio Segment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 2,287,460 | 2,286,517 |  |
Commercial Portfolio Segment | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 95,227 | 96,420 |  |
Commercial Portfolio Segment | Owner-occupied commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 74,737 | 73,392 |  |
Commercial Portfolio Segment | Investor commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 13,421 | 12,567 |  |
Commercial Portfolio Segment | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 64,581 | 60,274 |  |
Commercial Portfolio Segment | Single tenant lease financing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 972,275 | 995,879 |  |
Commercial Portfolio Segment | Public finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 627,678 | 687,094 |  |
Commercial Portfolio Segment | Healthcare finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 372,266 | 300,612 |  |
Commercial Portfolio Segment | Small business lending |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 67,275 | 60,279 |  |
Consumer Portfolio |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 539,190 | 633,464 |  |
Consumer Portfolio | Residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 218,730 | 313,849 |  |
Consumer Portfolio | Home equity |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 23,855 | 24,306 |  |
Consumer Portfolio | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | 296,605 | 295,309 |  |
Interest rate swaps | Commercial Portfolio Segment | Public finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total commercial loans | $ 44,600 | $ 21,400 |  |

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