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Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 08, 2018 | Aug. 31, 2017 | Sep. 30, 2016 | Dec. 31, 2018
Derivative [Line Items] |  |  |  |
Net amount of realized gains and losses from hedge agreements |  |  |  | $ 600,000
Interest Rate Swap | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Aggregate notional amount | $ 75,000,000 | $ 25,000,000 | $ 100,000,000 |
Derivative, fixed interest rate | 2.853% | 1.8475% |  |
Beginning date of transaction | Aug. 31, 2018 | Aug. 31, 2018 | Jan. 31, 2018 |
Derivative, maturity date | Aug. 31, 2023 | Aug. 31, 2023 | Jan. 31, 2023 |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Date the entity entered into the derivative contract, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80845-113994 + 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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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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- Details
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- Details
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- Details
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