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Fair Value Measurements - Financial Assets and Financial Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Items Measured on a Recurring Basis | U.S. Agency Obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | $ 100,015 | $ 81,581
Items Measured on a Recurring Basis | Equity investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | 9,519 | 8,700
Items Measured on a Recurring Basis | Interest rate swap asset |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | 557 |
Items Measured on a Recurring Basis | Interest rate swap liability |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | 636 |
Items Measured on a Recurring Basis | Level 1 Inputs | Equity investments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | 9,519 | 8,700
Items Measured on a Recurring Basis | Level 2 Inputs | U.S. Agency Obligations |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | 100,015 | 81,581
Items Measured on a Recurring Basis | Level 2 Inputs | Interest rate swap asset |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | 557 |
Items Measured on a Recurring Basis | Level 2 Inputs | Interest rate swap liability |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale | 636 |
Items Measured on a Non-Recurring Basis | Other real estate owned |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | 6,231 | 8,186
Items Measured on a Non-Recurring Basis | Loans measured for impairment based on the fair value of the underlying collateral |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | 13,001 | 16,496
Items Measured on a Non-Recurring Basis | Level 3 Inputs | Other real estate owned |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | 6,231 | 8,186
Items Measured on a Non-Recurring Basis | Level 3 Inputs | Loans measured for impairment based on the fair value of the underlying collateral |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value | $ 13,001 | $ 16,496

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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=99377789&loc=d3e19207-110258 + Details
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