CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) (Parentheticals) - Common Stock - $ / shares	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Class A
Statements of Equity
Distributions declared per share (in dollars per share)	$ 0.0625	$ 0.1563	$ 0.2188	$ 0.3126
Class C
Statements of Equity
Distributions declared per share (in dollars per share)	$ 0.0438	$ 0.1376	$ 0.1820	$ 0.2749

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration