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Loans Receivable - Categories (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | $ 1,107,798 |  | $ 949,038 |  |  |
Deferred loan origination costs and premiums and discounts on purchased loans | 3,824 |  | 4,821 |  |  |
Total loans | 1,111,622 |  | 953,859 |  |  |
Allowance for loan losses | (10,016) | $ (9,220) | (8,351) | $ (7,073) | $ (6,378) | $ (5,800)
Net loans | 1,101,606 |  | 945,508 |  |  |
Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (1,834) | (1,383) | (1,367) | (1,201) | (1,010) | (920)
Owner-occupied commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (461) | (475) | (476) | (439) | (391) | (345)
Investor commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (171) | (197) | (212) | (261) | (218) | (261)
Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (555) | (563) | (500) | (227) | (359) | (330)
Single tenant lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (5,059) | (4,678) | (3,931) | (3,093) | (2,452) | (2,061)
Residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (781) | (871) | (896) | (933) | (988) | (985)
Home equity |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (121) | (120) | (125) | (157) | (203) | (207)
Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Allowance for loan losses | (1,034) | $ (933) | (844) | $ (762) | $ (757) | $ (691)
Commercial Portfolio Segment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 724,954 |  | 582,888 |  |  |
Commercial Portfolio Segment | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 111,130 |  | 102,000 |  |  |
Commercial Portfolio Segment | Owner-occupied commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 46,543 |  | 44,462 |  |  |
Commercial Portfolio Segment | Investor commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 12,976 |  | 16,184 |  |  |
Commercial Portfolio Segment | Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 53,368 |  | 45,898 |  |  |
Commercial Portfolio Segment | Single tenant lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 500,937 |  | 374,344 |  |  |
Consumer Portfolio |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 382,844 |  | 366,150 |  |  |
Consumer Portfolio | Residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 202,107 |  | 214,559 |  |  |
Consumer Portfolio | Home equity |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 38,981 |  | 43,279 |  |  |
Consumer Portfolio | Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | $ 141,756 |  | $ 108,312 |  |  |

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