Discontinued Operations - Summary of the Properties Sold (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013 Predecessor	Mar. 31, 2014 2014 Dispositions Predecessor Park Center Drive sqft		Mar. 31, 2014 2014 Dispositions Predecessor N. Madera Road sqft		Mar. 31, 2013 2013 Dispositions Predecessor Worth Street sqft
Property Dispositions [Line Items]
Location			Vista, CA		Simi Valley, CA		Los Angeles, CA
Date of Disposition			Jan. 29, 2014		Mar. 13, 2014		Jan. 31, 2013
Rentable Square Feet			124,997		63,305		79,370
Sales Price			$ 10,103,000		$ 4,350,000		$ 4,100,000
Debt Satisfied							2,500,000	[1]
Gain on sale of real estate	$ 2,125,000	$ 2,409,000	$ 2,262,000	[2]	$ (137,000)	[2]	$ 2,409,000	[2]

[1] Amount represents the principal paid back to the lender to release the property from a larger pool of properties serving as collateral for the respective portfolio loan.

[2] Gain on sale of real estate is recorded as part of discontinued operations during the period of disposition.