Loans Payable, Senior Notes and Mortgage Company Loan Facility Loans Payable - Other (Details Textual 2) (Loans Payable [Member])	Jan. 31, 2015
Loans Payable [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.21%

Weighted average interest rate of debt outstanding.

No definition available.

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant