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Financial Instruments and Fair Value Measurements - Schedule of Derivative Financial Instruments (Parenthetical) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) derivative	Jul. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Derivatives, Fair Value [Line Items]
Fair value, liability derivatives	$ (103,204)		$ (39,061)
Core Portfolio
Derivatives, Fair Value [Line Items]
Derivative, notional amount	572,476
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Derivative, notional amount	$ 50,000	$ 30,400
Interest Rate Swaps | Core Portfolio | February 2020 Swap One Acquisition
Derivatives, Fair Value [Line Items]
Number of derivative instruments held | derivative	1
Fair value, liability derivatives	$ (2,900)
Derivative Effective Date	2022-04
Derivative, notional amount	$ 50,000
Interest Rate Swaps | Core Portfolio | February 2020 Swap Two Acquisition
Derivatives, Fair Value [Line Items]
Number of derivative instruments held | derivative	1
Fair value, liability derivatives	$ (2,600)
Derivative Effective Date	2023-04
Derivative, notional amount	$ 50,000

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: 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

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Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: 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

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The number of derivative instruments of a particular group held by the entity.

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