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Derivative Financial Instruments - Summary of Derivative Instruments Designated as Hedging Instruments (Details) - USD ($) | Jun. 30, 2019 | Apr. 01, 2019 | Dec. 31, 2018 | Sep. 01, 2015 | Dec. 01, 2014
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Derivative [Line Items] |  |  |  |  |
Fair Value | $ 5,000 |  | $ 26,000 |  |
Notional amount | $ 100,000,000 |  | 150,000,000 |  |
Interest rate cap |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative cap interest rate | 4.00% |  |  |  |
Interest rate cap, Maturity 5/4/2021 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative cap interest rate | 4.00% |  |  |  |
Fair Value | $ 5,000 |  | 25,000 |  |
Notional amount | $ 50,000,000 |  | 50,000,000 |  | $ 50,000,000.0
Interest rate cap, Maturity 4/1/2019 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative cap interest rate | 4.00% |  |  |  |
Fair Value | $ 0 |  | 0 |  |
Notional amount | $ 0 | $ 50,000,000.0 | 50,000,000 |  |
Interest rate cap, Maturity 2/3/2020 |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative cap interest rate | 4.00% |  |  |  |
Fair Value | $ 0 |  | 1,000 |  |
Notional amount | $ 50,000,000 |  | $ 50,000,000 | $ 50,000,000.0 |

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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- Definition Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + 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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