Investment in Real Estate - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended				6 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended	6 Months Ended						1 Months Ended	12 Months Ended				1 Months Ended
	Aug. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 integer	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2014 Purchase Price Allocation Adjustments	Dec. 31, 2013 Cascade [Member]	Jul. 17, 2014 Subsequent Event [Member]	Jun. 30, 2013 Segment, Discontinued Operations [Member]	Jun. 30, 2013 Segment, Discontinued Operations [Member]	Jan. 24, 2014 R V Resort [Member] site	Jan. 07, 2014 R V Resort [Member] site	Dec. 17, 2013 R V Resort [Member]	Sep. 16, 2013 R V Resort [Member]	Mar. 31, 2014 R V Resort [Member] Diversified Portfolio [Member]	Aug. 30, 2013 Manufactured Home [Member] integer	Dec. 31, 2013 Manufactured Home [Member] site Property	Aug. 01, 2013 Manufactured Home [Member] integer	May 08, 2013 Manufactured Home [Member]	Mar. 10, 2014 Manufactured Home [Member] Colony Cove [Member]	Jul. 17, 2014 Manufactured Home [Member] Subsequent Event [Member]	Jun. 30, 2014 Leases, Acquired-in-Place [Member]	Dec. 31, 2013 Leases, Acquired-in-Place [Member]	Jun. 30, 2014 Manufactured Home [Member]	Dec. 31, 2013 Manufactured Home [Member]	Jun. 30, 2014 Depreciable Assets [Member]	Dec. 31, 2013 Depreciable Assets [Member]	Jun. 30, 2014 Land [Member]	Dec. 31, 2013 Land [Member]	Jun. 30, 2014 New Credit Facilities [Member] R V Resort [Member]	Mar. 31, 2014 New Credit Facilities [Member] R V Resort [Member] Diversified Portfolio [Member]
Real Estate Properties [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		$ 62,981,000		$ 62,981,000			$ 133,393,000																	$ 773,000	$ 3,910,000	$ 769,000	$ 1,155,000	$ 20,632,000	$ 87,306,000	$ 40,807,000	$ 41,022,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other		1,197,000		1,197,000			1,025,000
Asset acquisition price adjustments period								1 year
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		0	0	0	958,000				1,000,000
Escrow Share Distribution						51,290
Number Of Properties Disposed																			11
Number of Sites Disposed																			5,344
Purchase Price For Disposed Properties																					165,000,000
Community Base Rental Income		106,502,000	101,468,000	212,547,000	202,244,000						5,080,000	10,117,000
Rental Home Income		3,746,000	3,598,000	7,503,000	6,992,000						849,000	1,620,000
Utility And Other Income		16,919,000	15,787,000	34,490,000	32,470,000						515,000	997,000
Disposal Group, Including Discontinued Operation, Revenue			6,444,000		12,734,000
Disposal Group, Including Discontinued Operation, Operating Expense			2,473,000		4,923,000
Disposal Group, Including Discontinued Operation, Operating Income (Loss)			3,971,000		7,811,000
Gains (Losses) on Sales of Other Real Estate											(40,000)	(75,000)
Disposal Group Including Discontinued Operation Other Income and Expenses			137,000		293,000
Disposal Group, Including Discontinued Operation, Interest Expense			(131,000)		(260,000)
Disposal Group, Including Discontinued Operation, Depreciation and Amortization			(772,000)		(1,536,000)
Number Of Acquired Sites													682	490	284	324				1,207
Business Acquisition, Purchase Price																24,600,000	31,800,000			102,000,000		35,900,000
Number of manufactured home communities acquired																		3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt																																13,300,000	18,700,000
Debt Instrument, Unamortized Discount (Premium), Net																																1,000,000	1,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		64,178,000		64,178,000			134,418,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		14,230,000		14,230,000			5,382,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		2,757,000		2,757,000			1,777,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		16,987,000		16,987,000			7,159,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		47,191,000		47,191,000			127,259,000
Units Issued During Period, Value, Acquisition	9,700,000
Units Issued During Period, Shares, Acquisition	240,969
Gain (Loss) on Condemnation										900,000
Proceeds from Condemnation		100,000								2,100,000													2,200,000
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ 0	$ 3,165,000	$ 0	$ 7,191,000						$ 3,165,000	$ 6,233,000
Number of Manufactured Homes Transferred				10