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Derivatives - Effect in the Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Derivative financial instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income		$ (27,776)	$ (15,012)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings	[1]	(1,314)	(7)
Derivatives Designated in Hedging Relationships | Interest rate swaps | Earnings from equity method investments
Derivative financial instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income		(15,172)	(7,190)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings		(226)	144
Derivatives Designated in Hedging Relationships | Interest rate swaps | Interest expense
Derivative financial instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income		(12,604)	(7,822)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings		$ (1,088)	$ (151)
[1] Amounts reclassified to "Interest expense" in the Company's consolidated statements of operations for the three months ended March 31, 2020 and 2019 are $1,088 and $151, respectively. Amounts reclassified to "Earnings (losses) from equity method investments" in the Company's consolidated statements of operations for the three months ended March 31, 2020 and 2019 are $226 and $(144), respectively.

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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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