Fair Value - Information About Our Fixed Rate Financial Instruments Not Measured at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Reported Value Measurement [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Loan secured by real estate	$ 6,240	$ 7,610
Fixed rate debt	(372,750)	(126,640)
Estimate of Fair Value Measurement [Member] | Level 2 [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Loan secured by real estate	11,695	18,025
Fixed rate debt	$ (395,230)	$ (118,634)