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Loans, net and allowance for loan losses - Changes in Allowance for Loan Losses Account by Major Classification of Loan (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Allowance for loan losses: |  |  |  |
Beginning Balance | $ 10,803 | $ 8,859 | $ 10,338 | $ 8,651
Charge-offs | (174) | (790) | (539) | (1,473)
Recoveries | 49 | 352 | 129 | 386
Provisions | 750 | 1,201 | 1,500 | 2,058
Ending balance | 11,428 | 9,622 | 11,428 | 9,622
Commercial [Member] |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 2,420 | 1,961 | 2,321 | 2,008
Charge-offs | (3) | (29) | (40) | (376)
Recoveries | 3 | 1 | 64 | 1
Provisions | 15 | 268 | 90 | 568
Ending balance | 2,435 | 2,201 | 2,435 | 2,201
Real Estate Commercial [Member] |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 3,087 | 2,473 | 3,037 | 2,394
Charge-offs | (30) | (404) | (79) | (432)
Recoveries | 5 | 269 | 6 | 269
Provisions | 128 | 337 | 226 | 444
Ending balance | 3,190 | 2,675 | 3,190 | 2,675
Real Estate Residential [Member] |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 3,909 | 3,248 | 3,690 | 3,135
Charge-offs | (35) | (270) | (234) | (510)
Recoveries | 3 | 35 | 8 | 38
Provisions | 150 | 445 | 563 | 795
Ending balance | 4,027 | 3,458 | 4,027 | 3,458
Consumer [Member] |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 1,387 | 1,177 | 1,290 | 1,114
Charge-offs | (106) | (87) | (186) | (155)
Recoveries | 38 | 47 | 51 | 78
Provisions | 457 | 151 | 621 | 251
Ending balance | $ 1,776 | $ 1,288 | $ 1,776 | $ 1,288

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + 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)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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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=49124121&loc=SL6953423-111524 + Details
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