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Fair Value of Financial Instruments - Additional Information (Detail) $ in Thousands		Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2011 instrument
Fair Value of Financial Instruments [Line Items]
Interest rate		4.25%	3.75%
Notes payable, fair value		$ 851,300	$ 892,900
Fixed rate mortgages		783,400	796,169
Interest rate swap
Fair Value of Financial Instruments [Line Items]
Fair value of derivative liability		$ 2,100
Cash flow hedging | Designated as hedging instrument | Interest rate swap
Fair Value of Financial Instruments [Line Items]
Derivative, number of instruments held | instrument				1
Fixed rate mortgage notes payable
Fair Value of Financial Instruments [Line Items]
Interest rate	[1]	5.48%
Fixed rate mortgages		$ 844,292	$ 832,441
[1] Interest rate and scheduled maturity data presented as of December 31, 2016. Totals computed using weighted averages. Amounts shown are principal amounts and have not been reduced by any deferred debt issuance costs.

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Fair Value of Financial Instruments [Line Items]

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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The number of derivative instruments of a particular group held by the entity.

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Fair value portion of notes payable.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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