Commitments and Contingencies - Additional Information (Detail) (USD $)		12 Months Ended		12 Months Ended	6 Months Ended	1 Months Ended		1 Months Ended		12 Months Ended		12 Months Ended
	Aug. 06, 2012	Dec. 31, 2010 Hurricane Claim Litigation	Jun. 22, 2007 Hurricane Claim Litigation	Dec. 31, 2012 Morgan RV Resorts [Domain] integer	Jun. 30, 2009 Attorney Fees [Member] California Rent Control Litigation Final Resolution in Favor of Company	Jul. 31, 2013 San Rafael [Member]	Dec. 31, 2010 San Rafael [Member]	Aug. 30, 2013 San Rafael [Member] Attorney Fees [Member]	Apr. 30, 2013 San Rafael [Member] Attorney Fees [Member]	Dec. 31, 2010 Colony Park [Member]	Dec. 31, 2010 Colony Park [Member] Maximum	Dec. 31, 2010 Colony Park [Member] Attorney Fees [Member]	Dec. 31, 2011 Membership Class Action
Loss Contingencies [Line Items]
Award for costs and attorney fee claimed					$ 2,100,000	$ 1,270,000		$ 80,000	$ 1,250,000			$ 2,000,000
Expiration period of Ordinance from June 30, 2009 date of judgment					10 years
Loss award claimed by plaintiffs							1,400,000			6,800,000
Loss awarded to plaintiffs											44,000
Number of plaintiff										72			2
Number of plaintiff the jury rendered verdicts										6
Number of plaintiffs dismissed										66
Loss Contingency Claims Dismissed And Not Appealed Number										3
Claims filed against Aon			11,000,000
Proceeds from insurance		7,400,000
Loss Contingency, Estimate of Possible Loss	$ 2,400,000
Number of Intended Purchase Properties				15
Number of Acquisition Properties Contested				11
Number of Contested Properties Closed				10