Acquisitions - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended								12 Months Ended			1 Months Ended		12 Months Ended									12 Months Ended
	Oct. 24, 2011	Sep. 30, 2011	Dec. 31, 2012 integer	Dec. 31, 2011 Rate integer	Dec. 31, 2010	May 31, 2011	Dec. 31, 2012 Minimum	Dec. 31, 2011 Minimum	Dec. 31, 2012 Maximum	Dec. 31, 2011 Maximum	Dec. 31, 2012 Common Stock	Dec. 31, 2011 Common Stock	Dec. 31, 2010 Common Stock	Dec. 23, 2011 Series B Subordinated Non-Voting Cumulative Redeemable Preferred Stock	Oct. 24, 2011 Series B Subordinated Non-Voting Cumulative Redeemable Preferred Stock	Dec. 31, 2012 Series B Subordinated Non-Voting Cumulative Redeemable Preferred Stock	Dec. 31, 2011 Series B Subordinated Non-Voting Cumulative Redeemable Preferred Stock	Dec. 31, 2010 Series B Subordinated Non-Voting Cumulative Redeemable Preferred Stock	Dec. 31, 2011 Manufactured homes integer	Dec. 31, 2011 Recreational Vehicle Resort [Member]	Dec. 31, 2012 R V Resort [Member] integer	Dec. 31, 2011 R V Resort [Member] integer	Apr. 21, 2010 R V Resort [Member] integer	Dec. 31, 2011 Acquired Property	Dec. 31, 2012 Business Acquisition Pro Forma Information	Dec. 31, 2011 Scenario, Forecast Business Acquisition Pro Forma Information	Dec. 31, 2012 Victoria [Member]	Dec. 31, 2012 Alamo Palms [Member]
Business Acquisition [Line Items]
Number of acquired site property			1,765	30,129																			573				1,122	643
Number Of Acquisition Properties Expected To Be Closed																			75	1
Number of acquired portfolio																					2		4
Number of sites per purchase agreements						31,167
Acres of land in which properties located				6,500
Number of states in which properties located						16
Purchase price			$ 25,000,000	$ 1,500,000,000		$ 1,430,000,000																	$ 2,500,000
Acquisition costs			180,000	18,493,000	0
Acquisition Properties, revenues			169,100,000	61,300,000
Number of closed acquisition properties				75
Mortgage debt assumed for the acquisition properties, aggregate stated value				548,000,000
Term loan financing proceeds			0	200,000,000	0
Proceeds from common stock offering				344,000,000
Common stock offering shares				6,037,500
New mortgage notes payable financing proceeds		200,000,000	159,500,000	200,000,000	76,615,000
Stock issued for the acquisition properties, share	3,162,069										0	1,708,276	0	286,207	1,453,793	0	1,740,000	0
Stock issued for the acquisition properties, aggregate stated value												111,000,000					113,000,000
Number of properties used as a pledge			171	174															20			3		35
Debt, minimum interest rate			3.90%	4.65%
Debt, maximum interest rate			8.90%	8.87%
Debt, maturity year							2013	2012	2023	2023
Amortization of Intangible Assets			$ 45,122,000	$ 28,479,000	$ 0																					$ 73,600,000
Property, Plant and Equipment, Useful Life																									1 year
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount				4,600,000