Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended	1 Months Ended	12 Months Ended		1 Months Ended	6 Months Ended		1 Months Ended	6 Months Ended
	Nov. 22, 2011	Jun. 30, 2012	Nov. 22, 2011 Minimum	Dec. 31, 2010 Colony Park Plaintiff	Dec. 31, 2010 Colony Park Maximum	Jul. 29, 2011 Membership Class Action Plaintiff	Dec. 31, 2010 Hurricane Claim Litigation	Jun. 22, 2007 Hurricane Claim Litigation	Dec. 14, 2011 Attorney Fees Colony Park	Jun. 30, 2009 Attorney Fees California Rent Control Litigation Final Resolution in Favor of Company
Loss Contingencies [Line Items]
Award for costs and attorney fee claimed									$ 2,000,000	$ 2,100,000
Expiration period of Ordinance from June 30, 2009 date of judgment										10 years
Loss award claimed by plaintiffs				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 and not appealed				3
Number of plaintiffs dismissed				66
Claims filed against Aon								11,000,000
Proceeds from insurance		14,700,000					7,400,000
Agreed settlement amount without admitting any liability	500,000
Years of services requested to receive settlement fee			5 years
Estimated cost that might be incurred related to legal settlement	$ 100,000