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Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2019 | Dec. 31, 2018
Interest Rate Swap |  |
Derivative Instruments and Hedging Activities Disclosures |  |
Notional amount | $ 200,000,000.0 |
Derivative instrument, underlying rate (percentage) | 1.85% |
Derivative instrument, effective rate (percentage) | 3.05% |
LIBOR | Interest Rate Swap |  |
Derivative Instruments and Hedging Activities Disclosures |  |
Derivative instrument, variable rate (percentage) | 1.20% |
Term Loan |  |
Derivative Instruments and Hedging Activities Disclosures |  |
Debt instrument face amount | $ 200,000,000.0 |
Loans Payable |  |
Derivative Instruments and Hedging Activities Disclosures |  |
Derivative, contract term (years) |  | 3 years
Loans Payable | LIBOR | Minimum |  |
Derivative Instruments and Hedging Activities Disclosures |  |
Debt instrument, variable rate on spread | 1.20% |
Loans Payable | LIBOR | Maximum |  |
Derivative Instruments and Hedging Activities Disclosures |  |
Debt instrument, variable rate on spread | 1.90% |

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- Definition Derivative Instrument, Effective Interest Rate + References No definition available. + Details
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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 Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition The percentage points added to the reference rate to compute the variable rate on the interest rate derivative. + References No definition available. + 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 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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