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Fair Value - Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis (Details) - Impaired loans - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Assets with fair value adjustments on a nonrecurring basis |  |  |  |  |
Total impairment losses | $ 0 | $ 0 | $ 0 | $ 500 |
Fair Value Measurements, Nonrecurring | Level 3 |  |  |  |  |
Assets with fair value adjustments on a nonrecurring basis |  |  |  |  |
Fair value | $ 357 |  | $ 357 |  | $ 402

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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