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Derivatives, Net - Summary of Amounts Recognized on Consolidated Statements of Operations Related to Company's Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments - unrealized									$ 29,345	$ (11,523)	$ 2,608
Gain (loss) on derivative instruments - realized									0	(289)	28,552
Gain (loss) on derivative instruments	$ 10,261	$ 6,291	$ 33,538	$ (11,032)	$ (1,265)	$ (7,481)	$ (7,389)	$ (3,045)	39,058	(19,180)	31,160
Total									39,058	(19,767)	31,160
Forward Currency Contract [Member] | Gain (Loss) on Derivative Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments - unrealized									29,345	(11,527)	2,665
Gain (loss) on derivative instruments - realized									9,713	(7,657)	28,552
Forward Currency Contract [Member] | Loss From Unconsolidated Joint Venture [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments - realized									0	(587)	0
Interest Rate Cap [Member] | Gain (Loss) on Derivative Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments - unrealized									0	4	(57)
Notional amount	$ 34,900				$ 40,200				$ 34,900	$ 40,200	$ 45,500

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- Definition

Gain (Loss) On Derivative Instruments, Net, Pretax, Including (Income) Loss From Unconsolidated Joint Venture

+ References

No definition available.

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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

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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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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