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Derivatives, Net - Summary of Amounts Recognized on Consolidated Statements of Operations Related to Company's Derivatives (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instruments - unrealized | $ (8,855,000) | $ (2,897,000)
Gain (loss) on derivative instruments | (11,032,000) | (3,045,000)
Forward Currency Contract [Member] | Gain (Loss) on Derivative Instruments [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instruments - unrealized | (8,859,000) | (2,883,000)
Loss on derivative instruments - realized | (2,177,000) | (156,000)
Interest Rate Cap [Member] | Gain (Loss) on Derivative Instruments [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instruments - unrealized | 4,000 | (6,000)
Aggregate Notional Amount (in thousands) | $ 38,862,000 | $ 44,200,000.0

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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 Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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