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

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References 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 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. + References 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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