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Loans and Allowance for Loan Losses - Loans Outstanding by Major Lending Classification (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | --- | ---
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | $ 1,970,974 |  | $ 1,848,784 |  |  |
Less: Allowance for loan losses | (23,247) | $ (22,898) | (21,747) | $ (23,734) | $ (24,431) | $ (24,460)
Net loans | 1,947,727 |  | 1,827,037 |  |  |
Commercial and Industrial |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 423,704 |  | 386,233 |  |  |
Less: Allowance for loan losses | (5,440) | (5,402) | (5,309) | (5,924) | (5,242) | (5,135)
Construction |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 282,727 |  | 245,905 |  |  |
Less: Allowance for loan losses | (5,579) | (5,598) | (4,940) | (4,373) | (4,518) | (5,143)
Residential Real Estate | 1-to-4 Family Mortgage |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 307,152 |  | 294,924 |  |  |
Less: Allowance for loan losses | (2,974) | (2,896) | (3,197) | (3,611) | (4,280) | (4,176)
Residential Real Estate | Residential Line of Credit |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 177,783 |  | 177,190 |  |  |
Less: Allowance for loan losses | (1,445) | (1,514) | (1,613) | (1,944) | (2,075) | (2,201)
Residential Real Estate | Multi-Family Mortgage |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 52,810 |  | 44,977 |  |  |
Less: Allowance for loan losses | (513) | (508) | (504) | (453) | (590) | (311)
Commercial Real Estate | Owner Occupied |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 371,462 |  | 357,346 |  |  |
Less: Allowance for loan losses | (3,983) | (3,387) | (3,302) | (3,764) | (4,013) | (3,682)
Commercial Real Estate | Non-Owner Occupied |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 273,285 |  | 267,902 |  |  |
Less: Allowance for loan losses | (2,452) | (2,660) | (2,019) | (2,634) | (2,739) | (2,622)
Consumer and Other |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |
Gross loans | 82,051 |  | 74,307 |  |  |
Less: Allowance for loan losses | $ (861) | $ (933) | $ (863) | $ (1,031) | $ (974) | $ (1,190)

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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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