Retirement And Other Benefit Plans - Information on Expected Cash Flows (Details) (USD $)	12 Months Ended
Jan. 31, 2015
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected Benefit Payments: 2015	$ 13,784,000
Expected Benefit Payments: 2016	12,215,000
Expected Benefit Payments: 2017	16,085,000
Expected Benefit Payments: 2018	13,743,000
Expected Benefit Payments: 2019	14,803,000
Expected Benefit Payments: 2020 - 2024	82,371,000
Funded Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2015 Employer contributions expected	79,000
Expected Benefit Payments: 2015	11,109,000
Expected Benefit Payments: 2016	11,807,000
Expected Benefit Payments: 2017	12,457,000
Expected Benefit Payments: 2018	13,201,000
Expected Benefit Payments: 2019	13,886,000
Expected Benefit Payments: 2020 - 2024	77,058,000
SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2015 Employer contributions expected	2,675
Expected Benefit Payments: 2015	2,675,000
Expected Benefit Payments: 2016	408,000
Expected Benefit Payments: 2017	3,628,000
Expected Benefit Payments: 2018	542,000
Expected Benefit Payments: 2019	917,000
Expected Benefit Payments: 2020 - 2024	5,313,000
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2015 Employer contributions expected	142,000
Expected Benefit Payments: 2015	142,000
Expected Benefit Payments: 2016	134,000
Expected Benefit Payments: 2017	127,000
Expected Benefit Payments: 2018	120,000
Expected Benefit Payments: 2019	113,000
Expected Benefit Payments: 2020 - 2024	$ 462,000

Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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