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Loans, net and allowance for loan losses - Changes in Allowance for Loan Losses Account by Major Classification of Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Dec. 31, 2017
Allowance for loan losses: |  |  |  |  |  |
Beginning Balance | $ 19,718 | $ 16,969 | $ 18,960 | $ 15,961 |  |
Charge-offs | (1,398) | (431) | (1,824) | (742) |  |
Recoveries | 203 | 64 | 337 | 183 |  |
Provisions | 1,050 | 1,200 | 2,100 | 2,400 |  |
Ending balance | 19,573 | 17,802 | 19,573 | 17,802 |  |
Beginning Balance | 19,718 | 16,969 | 18,960 | 15,961 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | $ 1,029 | $ 766
Charge-offs | (1,398) | (431) | (1,824) | (742) |  |
Ending balance: collectively evaluated for impairment |  |  |  |  | 18,544 | 18,194
Recoveries | 203 | 64 | 337 | 183 |  |
Ending balance: loans acquired with deteriorated credit quality | 19,718 | 16,969 | 18,960 | 15,961 | 19,573 | 18,960
Provisions | 1,050 | 1,200 | 2,100 | 2,400 |  |
Loans receivable: |  |  |  |  |  |
Total Loans |  |  |  |  | 1,753,389 | 1,693,065
Ending balance: individually evaluated for impairment |  |  |  |  | 9,637 | 9,705
Ending balance: collectively evaluated for impairment |  |  |  |  | 1,742,847 | 1,682,343
Total Loans |  |  |  |  | 1,753,389 | 1,693,065
Ending balance | 19,573 | 17,802 | 19,573 | 17,802 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 9,637 | 9,705
Ending balance: collectively evaluated for impairment |  |  |  |  | 1,742,847 | 1,682,343
Loans Acquired with Deteriorated Credit Quality |  |  |  |  |  |
Loans receivable: |  |  |  |  |  |
Ending balance |  |  |  |  | 905 | 1,017
Ending balance |  |  |  |  | 905 | 1,017
Commercial |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |
Beginning Balance | 5,406 | 4,129 | 5,052 | 3,799 |  |
Charge-offs | (2) | (32) | (2) | (32) |  |
Recoveries | 59 | 6 | 116 | 13 |  |
Provisions | 286 | 323 | 583 | 646 |  |
Ending balance | 5,749 | 4,426 | 5,749 | 4,426 |  |
Beginning Balance | 5,406 | 4,129 | 5,052 | 3,799 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 146 | 159
Charge-offs | (2) | (32) | (2) | (32) |  |
Ending balance: collectively evaluated for impairment |  |  |  |  | 5,603 | 4,893
Recoveries | 59 | 6 | 116 | 13 |  |
Ending balance: loans acquired with deteriorated credit quality | 5,406 | 4,129 | 5,052 | 3,799 | 5,749 | 5,052
Provisions | 286 | 323 | 583 | 646 |  |
Loans receivable: |  |  |  |  |  |
Total Loans |  |  |  |  | 469,318 | 476,199
Ending balance: individually evaluated for impairment |  |  |  |  | 1,972 | 2,121
Ending balance: collectively evaluated for impairment |  |  |  |  | 467,035 | 473,736
Total Loans |  |  |  |  | 469,318 | 476,199
Ending balance | 5,749 | 4,426 | 5,749 | 4,426 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 1,972 | 2,121
Ending balance: collectively evaluated for impairment |  |  |  |  | 467,035 | 473,736
Commercial | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |  |
Loans receivable: |  |  |  |  |  |
Ending balance |  |  |  |  | 311 | 342
Ending balance |  |  |  |  | 311 | 342
Real estate Commercial |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |
Beginning Balance | 8,099 | 6,291 | 7,548 | 5,847 |  |
Charge-offs | (1,169) | (242) | (1,169) | (367) |  |
Recoveries | 30 | 22 | 57 | 55 |  |
Provisions | 546 | 516 | 1,070 | 1,052 |  |
Ending balance | 7,506 | 6,587 | 7,506 | 6,587 |  |
Beginning Balance | 8,099 | 6,291 | 7,548 | 5,847 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 502 | 263
Charge-offs | (1,169) | (242) | (1,169) | (367) |  |
Ending balance: collectively evaluated for impairment |  |  |  |  | 7,004 | 7,285
Recoveries | 30 | 22 | 57 | 55 |  |
Ending balance: loans acquired with deteriorated credit quality | 8,099 | 6,291 | 7,548 | 5,847 | 7,506 | 7,548
Provisions | 546 | 516 | 1,070 | 1,052 |  |
Loans receivable: |  |  |  |  |  |
Total Loans |  |  |  |  | 867,349 | 786,210
Ending balance: individually evaluated for impairment |  |  |  |  | 4,060 | 3,644
Ending balance: collectively evaluated for impairment |  |  |  |  | 862,723 | 781,921
Total Loans |  |  |  |  | 867,349 | 786,210
Ending balance | 7,506 | 6,587 | 7,506 | 6,587 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 4,060 | 3,644
Ending balance: collectively evaluated for impairment |  |  |  |  | 862,723 | 781,921
Real estate Commercial | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |  |
Loans receivable: |  |  |  |  |  |
Ending balance |  |  |  |  | 566 | 645
Ending balance |  |  |  |  | 566 | 645
Real estate Residential |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |
Beginning Balance | 4,839 | 4,978 | 4,980 | 4,707 |  |
Charge-offs | (82) | (8) | (381) | (23) |  |
Recoveries | 57 | 4 | 67 | 26 |  |
Provisions | 148 | 222 | 296 | 486 |  |
Ending balance | 4,962 | 5,196 | 4,962 | 5,196 |  |
Beginning Balance | 4,839 | 4,978 | 4,980 | 4,707 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 378 | 336
Charge-offs | (82) | (8) | (381) | (23) |  |
Ending balance: collectively evaluated for impairment |  |  |  |  | 4,584 | 4,644
Recoveries | 57 | 4 | 67 | 26 |  |
Ending balance: loans acquired with deteriorated credit quality | 4,839 | 4,978 | 4,980 | 4,707 | 4,962 | 4,980
Provisions | 148 | 222 | 296 | 486 |  |
Loans receivable: |  |  |  |  |  |
Total Loans |  |  |  |  | 290,831 | 287,935
Ending balance: individually evaluated for impairment |  |  |  |  | 3,542 | 3,763
Ending balance: collectively evaluated for impairment |  |  |  |  | 287,261 | 284,142
Total Loans |  |  |  |  | 290,831 | 287,935
Ending balance | 4,962 | 5,196 | 4,962 | 5,196 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 3,542 | 3,763
Ending balance: collectively evaluated for impairment |  |  |  |  | 287,261 | 284,142
Real estate Residential | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |  |
Loans receivable: |  |  |  |  |  |
Ending balance |  |  |  |  | 28 | 30
Ending balance |  |  |  |  | 28 | 30
Real estate Residential |  |  |  |  |  |
Loans receivable: |  |  |  |  |  |
Total Loans |  |  |  |  | 290,831 | 287,935
Total Loans |  |  |  |  | 290,831 | 287,935
Consumer |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |
Beginning Balance | 1,374 | 1,571 | 1,380 | 1,608 |  |
Charge-offs | (145) | (149) | (272) | (320) |  |
Recoveries | 57 | 32 | 97 | 89 |  |
Provisions | 70 | 139 | 151 | 216 |  |
Ending balance | 1,356 | 1,593 | 1,356 | 1,593 |  |
Beginning Balance | 1,374 | 1,571 | 1,380 | 1,608 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 3 | 8
Charge-offs | (145) | (149) | (272) | (320) |  |
Ending balance: collectively evaluated for impairment |  |  |  |  | 1,353 | 1,372
Recoveries | 57 | 32 | 97 | 89 |  |
Ending balance: loans acquired with deteriorated credit quality | 1,374 | 1,571 | 1,380 | 1,608 | 1,356 | 1,380
Provisions | 70 | 139 | 151 | 216 |  |
Loans receivable: |  |  |  |  |  |
Total Loans |  |  |  |  | 125,891 | 142,721
Ending balance: individually evaluated for impairment |  |  |  |  | 63 | 177
Ending balance: collectively evaluated for impairment |  |  |  |  | 125,828 | 142,544
Total Loans |  |  |  |  | 125,891 | 142,721
Ending balance | $ 1,356 | $ 1,593 | $ 1,356 | $ 1,593 |  |
Ending balance: individually evaluated for impairment |  |  |  |  | 63 | 177
Ending balance: collectively evaluated for impairment |  |  |  |  | $ 125,828 | $ 142,544

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes 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 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
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