Equity Transactions Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			2 Months Ended	3 Months Ended							6 Months Ended	9 Months Ended		12 Months Ended			18 Months Ended
	Oct. 15, 2019	Feb. 14, 2019	Feb. 21, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Class of Stock [Line Items]
Stock Issued During Period, Value, New Issues									$ 33,600	$ 21,200	$ 92,600		$ 39,400			$ 29,700	$ 163,800
New shares issued (in shares)						3,737,500			400,000,000	280,502	1,008,699		398,516	458,541		321,800
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%
Proceeds from issuance of common stock						$ 452,100
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares														1,972,876
Dividends per common share:														$ 2.96	$ 2.80	$ 2.66
Cash, proceeds from dispositions held in escrow, or contingent liability														$ 853,682
Subsequent Event [Member]
Class of Stock [Line Items]
Cash, proceeds from dispositions held in escrow, or contingent liability			$ 13,500
Series D Preferred OP Units [Member]
Class of Stock [Line Items]
Temporary Equity, Shares Issued							488,958
Temporary Equity, Issuance Price							$ 100.00
Temporary Equity, Dividends For Term One, Percentage							3.75%
Temporary Equity, Dividends, Percentage							4.00%
Series D Preferred OP Units [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Temporary Equity, Dividends For Term One, Percentage		5.30%
Temporary Equity, Dividends, Percentage		5.50%
Common Stock [Member]
Class of Stock [Line Items]
Dividends per common share:					$ 0.75
Common Stock [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Payments of Ordinary Dividends, Common Stock	$ 71,704
Common OP Units [Member]
Class of Stock [Line Items]
Temporary Equity, Shares Issued				180,277										180,277
Conversion of Common OP Units to common stock (in shares)														180,277
Series A-4 preferred OP units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)														405,656
Series A-4 Preferred Stock [Member]
Class of Stock [Line Items]
Temporary Equity, Shares Issued				0										0	1,063,000		1,063,000
Conversion of Common OP Units to common stock (in shares)														1,031,747
Temporary Equity, Dividends For Term One, Percentage														6.50%
Jensen Communities [Domain] | Series D Preferred OP Units [Member]
Class of Stock [Line Items]
Cash, proceeds from dispositions held in escrow, or contingent liability														$ 389,697
Jensen Communities [Domain] | Common OP Units [Member]
Class of Stock [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares				1,972,876
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Value, New Issues														$ 58	$ 66	$ 63
Share Price				$ 115.39										$ 115.39	$ 87.24		$ 87.24
Series A-4 preferred OP units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												4,708	13,765
Series A-4 preferred OP units [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												2,092	6,116
Conversion of Stock, Shares Issued												0.4444
Series A-4 Preferred Stock [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												1,062,789	22,576
Series A-4 Preferred Stock [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												472,366	10,033
Conversion of Stock, Shares Issued												0.4444
Series A-1 Preferred OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												22,707	13,430
Series A-1 Preferred OP Units [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												55,370	32,752
Conversion of Stock, Shares Issued												2.4390
Conversion of Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												485,629	20,608
Conversion of Common OP Units [Member] | Common OP Units [Member]
Class of Stock [Line Items]
Conversion of Common OP Units to common stock (in shares)												485,629
Conversion of Stock, Shares Issued												1.0000
Forecast [Member] | Series D Preferred OP Units [Member]
Class of Stock [Line Items]
Convertible Preferred Stock, Shares Issued upon Conversion							0.8
Sun NG RV Resorts [Member] | NG Sun LLC [Member]
Class of Stock [Line Items]
Variable Interest Entity, Equity Interests Issued, Floating Rate												5.00%
Common Stock [Member] | NG Sun Whitewater [Domain] | NG Sun Whitewater [Domain]
Class of Stock [Line Items]
Variable Interest Entity, Equity Interests Issued					$ 2,400
Common Stock [Member] | Sun NG RV Resorts [Member] | NG Sun LLC [Member]
Class of Stock [Line Items]
Variable Interest Entity, Equity Interests Issued								$ 6,500
Common Stock [Member] | Sun NG RV Resorts [Member] | Sun NG RV Resorts [Member]
Class of Stock [Line Items]
Variable Interest Entity, Equity Interests Issued								$ 15,400