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Repurchase Agreements - Schedule of Repurchase Agreements (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | $ 13,793 | $ 13,509
Overnight and Continuous [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | 13,793 | 13,509
Up to 30 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
30 - 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
Greater Than 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
U.S. Federal Treasury Obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | 388 |
U.S. Federal Treasury Obligations [Member] | Overnight and Continuous [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | 388 |
U.S. Federal Treasury Obligations [Member] | Up to 30 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
U.S. Federal Treasury Obligations [Member] | 30 - 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
U.S. Federal Treasury Obligations [Member] | Greater Than 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
US Federal Agency Obligations [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | 4,958 | 5,147
US Federal Agency Obligations [Member] | Overnight and Continuous [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | 4,958 | 5,147
US Federal Agency Obligations [Member] | Up to 30 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
US Federal Agency Obligations [Member] | 30 - 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
US Federal Agency Obligations [Member] | Greater Than 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
Agency Mortgage-backed Securities [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | 8,447 | 8,362
Agency Mortgage-backed Securities [Member] | Overnight and Continuous [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount | 8,447 | 8,362
Agency Mortgage-backed Securities [Member] | Up to 30 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
Agency Mortgage-backed Securities [Member] | 30 - 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |
Agency Mortgage-backed Securities [Member] | Greater Than 90 Days [Member] |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Assets Sold under Agreements to Repurchase, Carrying Amount |  |

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- Definition Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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