Retirement Plans (Periodic Pension Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Amortization of prior service cost (credit)	$ 1,283	$ 1,548	$ 1,629
Total recognized in other Comprehensive Income	6,254	(2,006)	658
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	20,200
Employee Plan [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	4,893	(407)
Prior service cost		0
Defined Benefit Plan, Amortization of Gains (Losses)	(1,136)	(2,264)
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	3,757	(2,671)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	0	0
Net actuarial loss (gain)	1,529	1,136
Net periodic pension cost	1,529	1,136
Projected benefit obligation	37,708	32,069	32,840
Accumulated benefit obligation	37,708	32,069
Fair value of plan assets	21,187	18,168	16,875
Components of Net Cost
Service cost	0	0
Interest cost	1,260	1,312
Expected return on plan assets	1,102	1,119
Amortization of transition amount	0	0
Recognized (gain) loss due to curtailments	0	0
Amortization of prior service cost	0	0
Recognized net actuarial loss	1,136	2,264
Benefit cost	1,294	2,457
Estimated Future Benefit Payments
FYE 01-31-2016	4,789
FYE 01-31-2017	2,686
FYE 01-31-2018	1,619
FYE 01-31-2019	2,045
FYE 01-31-2020	1,737
FYE 01-31-2021 to 2025	11,117
Total	23,993
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	3.25%	4.25%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	4.25%	4.00%
Expected return on plan assets	6.50%	6.50%
VIP Retirement Plan [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	2,636	(176)
Prior service cost
Defined Benefit Plan, Amortization of Gains (Losses)	(178)	(222)
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	2,458	(398)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	0	0
Net actuarial loss (gain)	484	178
Net periodic pension cost	484	178
Projected benefit obligation	10,104	7,662	8,054
Accumulated benefit obligation	10,104	7,662
Fair value of plan assets	0	0	0
Components of Net Cost
Service cost	0	0
Interest cost	350	330
Expected return on plan assets	0	0
Amortization of transition amount	0	0
Recognized (gain) loss due to curtailments	0	0
Amortization of prior service cost	0	0
Recognized net actuarial loss	178	222
Benefit cost	528	552
Estimated Future Benefit Payments
FYE 01-31-2016	613
FYE 01-31-2017	339
FYE 01-31-2018	325
FYE 01-31-2019	350
FYE 01-31-2020	368
FYE 01-31-2021 to 2025	1,916
Total	3,911
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	3.50%	4.75%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	4.75%	4.25%
Directors Plan [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	8	(29)
Prior service cost		0
Defined Benefit Plan, Amortization of Gains (Losses)	31	14
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	39	(15)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	0	0
Net actuarial loss (gain)	0	(31)
Net periodic pension cost	0	(31)
Projected benefit obligation	428	439	468
Accumulated benefit obligation	428	439
Fair value of plan assets	0	0	0
Components of Net Cost
Service cost	0	0
Interest cost	17	18
Expected return on plan assets	0	0
Amortization of transition amount	0	0
Recognized (gain) loss due to curtailments	0	0
Recognized net actuarial loss	(31)	(14)
Benefit cost	(14)	4
Estimated Future Benefit Payments
FYE 01-31-2016	51
FYE 01-31-2017	48
FYE 01-31-2018	45
FYE 01-31-2019	42
FYE 01-31-2020	39
FYE 01-31-2021 to 2025	148
Total	$ 373
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	3.25%	4.25%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	4.25%	4.00%

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503844

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (e)

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