Equity and Temporary Equity, Narrative (Details) $ / shares in Units, $ in Thousands	1 Months Ended					3 Months Ended			9 Months Ended	12 Months Ended	15 Months Ended
	Feb. 28, 2020	Aug. 31, 2019 USD ($)	May 31, 2019 USD ($) shares	Feb. 28, 2019 $ / shares Rate shares	Jun. 30, 2018 USD ($)	Mar. 31, 2020 USD ($) $ / shares Rate shares	Dec. 31, 2019 shares	Mar. 31, 2019 USD ($) shares	Sep. 30, 2019 USD ($)	Dec. 31, 2019 shares	Sep. 30, 2018 USD ($)
Class of Stock [Line Items]
Sale of Stock, Number of Shares Issued in Transaction			3,737,500
Proceeds from Issuance of Common Stock | $			$ 452,100
Variable Interest Entity, Equity Interests Issued | $		$ 2,400
Issuance of common stock and common OP units, net | $											$ 163,800
Aggregate Value of Shares to be Issued in Accordance to Sales Agreement | $									$ 450,000
Commission, Maximum Percentage of Gross Sales Price Per Share According to Sales Agreement									200.00%
Stock Issued During Period, Shares, New Issues										458,541
Shares outstanding							488,958			488,958
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares										1,972,876
Series E Preferred OP Units [Domain]
Class of Stock [Line Items]
Temporary Equity, Dividends For Term One, Percentage						5.25%
Series A-4 Preferred Stock, Shares Issued						90,000
Temporary Equity, Issuance Price | $ / shares						$ 100.00
Temporary Equity, Dividends For Term Two, Percentage | Rate						5.50%
Shares outstanding						90,000
Series D Preferred OP Units
Class of Stock [Line Items]
Temporary Equity, Dividends For Term One, Percentage				3.75%
Series A-4 Preferred Stock, Shares Issued				488,958
Temporary Equity, Issuance Price | $ / shares				$ 100.00
Temporary Equity, Dividends For Term Two, Percentage | Rate				4.00%
Shares outstanding						488,958
Series A-4 Preferred Stock
Class of Stock [Line Items]
Temporary Equity, Dividends For Term One, Percentage										6.50%
Conversion of Common OP Units to common stock (in shares)										1,031,747
Series A-4 Preferred Stock, Shares Issued						0	0			0
Common Stock
Class of Stock [Line Items]
Dividends per common share | $ / shares						$ 0.79
Common OP Units
Class of Stock [Line Items]
Series A-4 Preferred Stock, Shares Issued							180,277			180,277
Series A-4 preferred OP units
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)										405,656
Common Stock
Class of Stock [Line Items]
Issuance of common stock and common OP units, net | $						$ 1		$ 1
Conversion of Common OP Units
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)						11,949		6,533
Conversion of Common OP Units | Common OP Units
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)						11,949
Series A-1 Preferred OP Units
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)						6,677		3,950
Series A-1 Preferred OP Units | Common OP Units
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)						16,283		9,633
NG Sun LLC [Member] | Sun NG RV Resorts [Member]
Class of Stock [Line Items]
Variable Interest Entity, Equity Interests Issued, Floating Rate						5.00%
NG Sun LLC [Member] | Common Stock | Sun NG RV Resorts [Member]
Class of Stock [Line Items]
Variable Interest Entity, Equity Interests Issued | $					$ 6,500
Sun NG RV Resorts [Member] | Common Stock | Sun NG RV Resorts [Member]
Class of Stock [Line Items]
Variable Interest Entity, Equity Interests Issued | $					$ 15,400
Forecast [Member] | Series D Preferred OP Units
Class of Stock [Line Items]
Convertible Preferred Stock, Shares Issued Per Share Upon Conversion	100.0
Jensen Communities [Domain] | Common OP Units
Class of Stock [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares							1,972,876