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Loans (Details 3) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Allowance for loan losses |  |
Beginning balance | $ 12,315 | $ 10,852
Provision for loan losses | 775 | 1,050
Loans charged off | (782) | (943)
Recoveries | 242 | 360
Ending balance | 12,550 | 11,319
Commercial real estate |  |
Allowance for loan losses |  |
Beginning balance | 4,260 | 3,577
Provision for loan losses | 142 | 77
Loans charged off | 0 | (140)
Recoveries | 2 | 124
Ending balance | 4,404 | 3,638
Commercial |  |
Allowance for loan losses |  |
Beginning balance | 2,011 | 1,874
Provision for loan losses | 147 | 17
Loans charged off | (97) | (102)
Recoveries | 1 | 57
Ending balance | 2,062 | 1,846
Residential real estate |  |
Allowance for loan losses |  |
Beginning balance | 2,521 | 2,205
Provision for loan losses | 75 | 109
Loans charged off | (56) | (6)
Recoveries | 61 | 13
Ending balance | 2,601 | 2,321
Consumer |  |
Allowance for loan losses |  |
Beginning balance | 2,848 | 2,766
Provision for loan losses | 527 | 576
Loans charged off | (629) | (695)
Recoveries | 178 | 166
Ending balance | 2,924 | 2,813
Unallocated |  |
Allowance for loan losses |  |
Beginning balance | 675 | 430
Provision for loan losses | (116) | 271
Loans charged off | 0 | 0
Recoveries | 0 | 0
Ending balance | $ 559 | $ 701

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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + 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 (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + 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 (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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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=84173941&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=84173941&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 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: 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=82894903&loc=d3e15032-111544 + Details
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