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Loans Receivable - Categories (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | $ 809,452 |  | $ 727,227 |  |  |
Deferred loan origination costs and premiums and discounts on purchased loans | 4,791 |  | 5,199 |  |  |
Total loans receivable | 814,243 |  | 732,426 |  |  |
Allowance for loan losses | (7,073) | $ (6,378) | (5,800) | $ (5,140) | $ (5,388) | $ (5,426)
Net loans receivable | 807,170 |  | 726,626 |  |  |
Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 89,316 |  | 77,232 |  |  |
Allowance for loan losses | (1,201) | (1,010) | (920) | (735) | (871) | (819)
Owner-occupied commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 39,405 |  | 34,295 |  |  |
Allowance for loan losses | (439) | (391) | (345) | (271) | (305) | (290)
Investor commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 20,163 |  | 22,069 |  |  |
Allowance for loan losses | (261) | (218) | (261) | (205) | (231) | (219)
Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 20,155 |  | 24,883 |  |  |
Allowance for loan losses | (227) | (359) | (330) | (259) | (292) | (277)
Single tenant lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 279,891 |  | 192,608 |  |  |
Allowance for loan losses | (3,093) | (2,452) | (2,061) | (1,660) | (1,868) | (1,731)
Total commercial loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 448,930 |  | 351,087 |  |  |
Residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 207,703 |  | 220,612 |  |  |
Allowance for loan losses | (933) | (988) | (985) | (990) | (859) | (1,008)
Home equity |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 49,662 |  | 58,434 |  |  |
Allowance for loan losses | (157) | (203) | (207) | (213) | (185) | (211)
Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | 103,157 |  | 97,094 |  |  |
Allowance for loan losses | (762) | $ (757) | (691) | $ (807) | $ (777) | $ (871)
Total consumer loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total commercial loans | $ 360,522 |  | $ 376,140 |  |  |

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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