Partners' Capital and Incentive Compensation Plans - Additional Information (Detail) (QualityTech, LP [Member], USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	9 Months Ended
	Aug. 31, 2013	Sep. 30, 2013 Class
Partners Capital And Distributions [Line Items]
Number of classes of partnership units outstanding		5
Equity incentive plan, units granted		224,244
Distributions made to partners	$ 7.7
RS units [Member]
Partners Capital And Distributions [Line Items]
Equity incentive plan, units converted		3,750
Nonvested awards outstanding		100,000
O units [Member]
Partners Capital And Distributions [Line Items]
Equity incentive plan, units forfeited		45,531
Nonvested awards outstanding		1,300,000