Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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Loans Payable, Senior Notes and Mortgage Company Loan Facility Term Loan Facility (Details Textual 1) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2014	Jul. 31, 2017	Oct. 31, 2016
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unsecured Long-term Debt, Noncurrent		$ 500,000	$ 500,000
Five year term note [Member]
Debt Instrument [Line Items]
Debt Instrument, Term	5 years
Debt Instrument, Interest Rate at Period End		2.64%
Guarantor Subsidiaries [Member]
Debt Instrument [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		100.00%