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Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 31, 2010 | Sep. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2014
Interest Rate Swap |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Decrease in other expenses |  | $ 252 |  |
Interest Rate Swap | Interest Rate Swap Contract 3 |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative, term of contract | 14 years |  |  |
Interest rate swap, notional amount | $ 27,900 |  |  |
Interest rate swap, variable interest rate | (3.74%) |  |  |
Interest rate swap, amount reclassified |  |  | $ 34 | $ 566
Decrease in deferred liabilities |  | $ 252 |  |

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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 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 Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Variable interest rate in effect as of the balance sheet date related to the interest rate derivative. + References No definition available. + Details
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- Definition Amount, before tax, of reclassification from accumulated other comprehensive income (AOCI) for gain (loss) from derivative designated and qualifying as net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CCC -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998896-113959 + Details
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