Summary of Significant Accounting Policies - Deferred Leasing Intangibles, Included in Total Assets and Liabilities (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Accumulated amortization, assets	$ 26,663	$ 32,614
Accumulated amortization, liabilities	$ 7,604	$ 8,527