Summary of Related Party Costs Incurred (Parenthetical) (Detail) (USD $)	3 Months Ended			12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2013	Mar. 31, 2013	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Stockade Portfolio	Sep. 30, 2013 Stockade Portfolio	Dec. 31, 2012 Stockade Portfolio	Dec. 31, 2012 Dufferin property
Related Party Transaction [Line Items]
Reimbursable indirect costs waived				$ 975,000	$ 960,000	$ 740,000
Reimbursable indirect costs not waived	340,000		260,000
Waived asset management fees								525,000	186,000	37,000
Asset management fees not waived							175,000
Property management fees to the sub-property manager of Canadian properties				27,000	100,000	60,000
Sub-property management agreement terminated		28,000
Property Manager waived certain costs				$ 759,000