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Other Real Estate Owned and Repossessions - Summary of Foreclosed Property Activity (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Other Real Estate And Other Assets Acquired In Foreclosure [Line Items] |  |  |
Beginning balance |  | $ 1,505 | $ 3,792
Additions | [1] | 312 | 249
Sales proceeds |  | (523) | (2,530)
Gross gains |  | 39 | 275
Gross losses |  | (47) | (100)
Net gains (losses) |  | (8) | 175
Impairment |  | (38) | (197)
Ending balance |  | 1,248 | 1,489
FUSB [Member] |  |  |
Other Real Estate And Other Assets Acquired In Foreclosure [Line Items] |  |  |
Beginning balance |  | 1,401 | 3,527
Additions | [1] | 224 | 191
Sales proceeds |  | (443) | (2,453)
Gross gains |  | 37 | 267
Gross losses |  | (21) | (46)
Net gains (losses) |  | 16 | 221
Impairment |  |  | (167)
Ending balance |  | 1,198 | 1,319
ALC [Member] |  |  |
Other Real Estate And Other Assets Acquired In Foreclosure [Line Items] |  |  |
Beginning balance |  | 104 | 265
Additions | [1] | 88 | 58
Sales proceeds |  | (80) | (77)
Gross gains |  | 2 | 8
Gross losses |  | (26) | (54)
Net gains (losses) |  | (24) | (46)
Impairment |  | (38) | (30)
Ending balance |  | $ 50 | $ 170
[1] | Additions to other real estate owned (“OREO”) include transfers from loans and capitalized improvements to existing OREO properties.

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
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