Financing Activity - Mortgage Loan Activity Additional Detail (Detail) - Magnolia Mall [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Mortgage Loan Activity [Line Items]
Repayment Of Mortgage Secured Loan	$ 55.6
Two Thousand Thirteen Revolving Credit Facility [Member]
Mortgage Loan Activity [Line Items]
Revolving Facility Debt Used to Repay Mortgage Debt		$ 40.0
Available Cash From Working Capital Used To Repay Mortgage Debt		$ 15.6