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Commitments and Contingencies - Additional Information (Detail) (USD $) | 9 Months Ended | 6 Months Ended | 1 Months Ended |  | 1 Months Ended | 12 Months Ended |  | 12 Months Ended | 0 Months Ended |
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Sep. 30, 2014 | Jun. 30, 2009 Attorney Fees [Member] California Rent Control Litigation | Jul. 31, 2013 San Rafael [Member] | Dec. 31, 2013 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] integer | Dec. 31, 2010 Colony Park [Member] Maximum [Member] | Dec. 31, 2011 Colony Park [Member] Attorney Fees [Member] | Apr. 15, 2014 Compensatory Damages [Member] | Apr. 15, 2014 Punitive Damages [Member] | Sep. 30, 2014 California Hawaiian [Member]
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 |  |  |
Loss Contingency, Damages Awarded, Value |  |  |  |  |  |  |  |  |  | 15,300,000 | 95,800,000 |
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 |  |  |  |  |
Number of plaintiff the jury rendered verdicts |  |  |  |  |  |  | 6 |  |  |  |  |
Number of plaintiffs dismissed |  |  |  |  |  |  | 66 |  |  |  |  |
Loss Contingency Claims Dismissed And Not Appealed Number |  |  |  |  |  |  | 3 |  |  |  |  |
Loss Contingency, Range of Possible Loss | zero and approximately $111.1 million based on all of the facts presented. At this time, we cannot determine that any amount within the range is a better estimate and therefore we conclude that we should accrue the minimum of zero |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Range of Possible Loss, Minimum |  |  |  |  |  |  |  |  |  |  |  | 0
Loss Contingency, Range of Possible Loss, Maximum |  |  |  |  |  |  |  |  |  |  |  | 111,100,000
Loss Contingency Accrual |  |  |  |  |  |  |  |  |  |  |  | $ 0

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