Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended			96 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2007	Dec. 31, 2012
Accounting Policies [Abstract]
Maturity of liquid investments	three months or less
Accumulated amortization deferred financing costs	$ 20,332	$ 17,173
Allowance for doubtful accounts receivable	1,515	1,695
Deferred rent receivable allowance amount	$ 2,669	1,888
Minimum percentage of taxable income to be distributed	90.00%
Operating Partnership's minimum ownership interest in the limited partnerships	99.00%
Statement [Line Items]
Common Stock	$ 1,111	1,106
Additional Paid-in-Capital	1,756,415	1,751,059
Accumulated Distributions in Excess of Net Income	(674,759)	(689,348)
Restatement Adjustment
Statement [Line Items]
Stock Repurchased During Period, Shares				4,324,114
Common Stock		43
Additional Paid-in-Capital		121,277
Accumulated Distributions in Excess of Net Income		18,698
Previously Reported
Statement [Line Items]
Common Stock		1,149	$ 1,143		$ 1,031
Additional Paid-in-Capital		1,872,336	1,938,886		1,906,490
Accumulated Distributions in Excess of Net Income		(670,650)	(669,896)		$ (657,567)
In-Place Leases and Tenant Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization expense of deferred leasing intangibles	6,326	6,239	5,598
Above and Below Market Leases
Finite-Lived Intangible Assets [Line Items]
Amortization expense of deferred leasing intangibles	$ 462	$ 925	$ 572