Fair Value Measurements - Summary of Carrying Amounts and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total Assets	$ 356,758	$ 343,546
Total liabilities	163,301	194,196
Carrying Amount [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash equivalents	36,408	401,215
Total Assets	36,408	401,215
Mortgage and notes payable	2,853,735	2,852,287
Total liabilities	2,853,735	2,852,287
Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash equivalents	36,408	401,215
Total Assets	36,408	401,215
Mortgage and notes payable	2,802,234	2,796,842
Total liabilities	$ 2,802,234	$ 2,796,842