Credit Facilities and Mortgage Notes Payable - Dallas Note - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Debt Instrument [Line Items]
Loan agreement, maturity date	Dec. 31, 2013
Dallas Note [Member]
Debt Instrument [Line Items]
Weighted average interest rate for debt	3.73%
Loan agreement, maturity date	Dec. 31, 2013
Loan agreement amount of loan	$ 10.25
Dallas Note [Member] | Minimum [Member]
Debt Instrument [Line Items]
Range of percentage of escalation interest rate	2.50%
Dallas Note [Member] | Maximum [Member]
Debt Instrument [Line Items]
Range of percentage of escalation interest rate	10.00%