Debt - Mortgage Loans Payable (Parenthetical) (Detail) - Mortgage Loans Payable [Member]		3 Months Ended
	Apr. 28, 2016	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
LIBOR rate		0.43725%	0.4295%
Phoenix AZ [Member]
Debt Instrument [Line Items]
Percentage of proceeds from sale of property used to repay mortgage		100.00%
5.75% Loan Due in Jun 2016 [Member] | Subsequent Event [Member] | Chicago, IL [Member]
Debt Instrument [Line Items]
Date of loan repayment	Apr. 28, 2016
2.69% Loan Due in Oct 2016 [Member]
Debt Instrument [Line Items]
Mortgage loan, LIBOR rate		0.69%