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Loans and Allowance for Loan Losses - Allowance for Loan Losses by Portfolio Segment and Related Investment in Loans Net of Unearned Interest (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | $ 22,898 | $ 24,431 | $ 21,747 | $ 24,460
Provision for loan losses | (865) | (789) | (1,122) | (798)
Recoveries of loans previously charged-off | 2,005 | 746 | 3,855 | 978
Loans charged off | (791) | (654) | (1,233) | (906)
Ending balance | 23,247 | 23,734 | 23,247 | 23,734
Commercial and Industrial |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 5,402 | 5,242 | 5,309 | 5,135
Provision for loan losses | (1,342) | 416 | (1,163) | 515
Recoveries of loans previously charged-off | 1,511 | 462 | 1,594 | 472
Loans charged off | (131) | (196) | (300) | (198)
Ending balance | 5,440 | 5,924 | 5,440 | 5,924
Construction |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 5,598 | 4,518 | 4,940 | 5,143
Provision for loan losses | (48) | (207) | 587 | (873)
Recoveries of loans previously charged-off | 29 | 64 | 58 | 105
Loans charged off |  | (2) | (6) | (2)
Ending balance | 5,579 | 4,373 | 5,579 | 4,373
Residential Real Estate | 1-to-4 Family Mortgage |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 2,896 | 4,280 | 3,197 | 4,176
Provision for loan losses | 99 | (661) | (140) | (619)
Recoveries of loans previously charged-off | 14 | 45 | 40 | 107
Loans charged off | (35) | (53) | (123) | (53)
Ending balance | 2,974 | 3,611 | 2,974 | 3,611
Residential Real Estate | Residential Line of Credit |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 1,514 | 2,075 | 1,613 | 2,201
Provision for loan losses | (29) | (126) | (184) | (289)
Recoveries of loans previously charged-off | 155 | 70 | 211 | 107
Loans charged off | (195) | (75) | (195) | (75)
Ending balance | 1,445 | 1,944 | 1,445 | 1,944
Residential Real Estate | Multi-Family Mortgage |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 508 | 590 | 504 | 311
Provision for loan losses | 5 | (137) | 9 | 142
Ending balance | 513 | 453 | 513 | 453
Commercial Real Estate | Owner Occupied |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 3,387 | 4,013 | 3,302 | 3,682
Provision for loan losses | 585 | (161) | 666 | 164
Recoveries of loans previously charged-off | 11 | 5 | 15 | 11
Loans charged off |  | (93) |  | (93)
Ending balance | 3,983 | 3,764 | 3,983 | 3,764
Commercial Real Estate | Non-Owner Occupied |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 2,660 | 2,739 | 2,019 | 2,622
Provision for loan losses | (210) | (106) | (1,208) | 7
Recoveries of loans previously charged-off | 2 | 1 | 1,641 | 5
Ending balance | 2,452 | 2,634 | 2,452 | 2,634
Consumer and Other |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning balance | 933 | 974 | 863 | 1,190
Provision for loan losses | 75 | 193 | 311 | 155
Recoveries of loans previously charged-off | 283 | 99 | 296 | 171
Loans charged off | (430) | (235) | (609) | (485)
Ending balance | $ 861 | $ 1,031 | $ 861 | $ 1,031

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + 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=66008989&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + 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=66008989&loc=SL6953423-111524 Reference 2: 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 + 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=66008989&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=66008989&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=6379141&loc=d3e15032-111544 + Details
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