Retirement Plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Amortization of prior service cost (credit)	$ 2,013	$ 1,283	$ 1,548
Total recognized in other Comprehensive Income	(5,904)	6,254	(2,006)
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	14,300
Employee Plan [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	$ (1,986)	4,893
Prior service cost		0
Defined Benefit Plan, Amortization of Gains (Losses)	$ (2,117)	(1,136)
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	(4,103)	3,757
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)	1,162	1,529
Net periodic pension cost	1,162	1,529
Projected benefit obligation	32,659	37,708	32,069
Accumulated benefit obligation	32,659	37,708
Fair value of plan assets	19,848	21,187	18,168
Components of Net Cost
Service cost	0	0
Interest cost	1,147	1,260
Expected return on plan assets	(1,295)	(1,102)
Amortization of transition amount	0	0
Recognized (gain) loss due to settlement	587	0
Amortization of prior service cost	0	0
Recognized net actuarial loss	1,529	1,136
Benefit cost	1,968	$ 1,294
Estimated Future Benefit Payments
FYE 01-31-2017	6,194
FYE 01-31-2018	1,503
FYE 01-31-2019	1,797
FYE 01-31-2020	1,597
FYE 01-31-2021	1,601
FYE 01-31-2022 to 2026	9,455
Total	$ 22,147
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	4.00%	3.25%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	3.25%	4.25%
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)	$ (1,209)	$ 2,636
Prior service cost
Defined Benefit Plan, Amortization of Gains (Losses)	$ (484)	$ (178)
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	(1,693)	2,458
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)	310	484
Net periodic pension cost	310	484
Projected benefit obligation	8,701	10,104	7,662
Accumulated benefit obligation	8,701	10,104
Fair value of plan assets	0	0	0
Components of Net Cost
Service cost	0	0
Interest cost	343	350
Expected return on plan assets	0	0
Amortization of transition amount	0	0
Recognized (gain) loss due to settlement	0	0
Amortization of prior service cost	0	0
Recognized net actuarial loss	484	178
Benefit cost	827	$ 528
Estimated Future Benefit Payments
FYE 01-31-2017	593
FYE 01-31-2018	294
FYE 01-31-2019	321
FYE 01-31-2020	341
FYE 01-31-2021	328
FYE 01-31-2022 to 2026	1,911
Total	$ 3,788
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	4.25%	3.50%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	3.50%	4.75%
Directors Plan [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	$ (107)	$ 8
Prior service cost		0
Defined Benefit Plan, Amortization of Gains (Losses)	$ 0	31
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	(107)	39
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)	(116)	0
Net periodic pension cost	(116)	0
Projected benefit obligation	280	428	439
Accumulated benefit obligation	280	428
Fair value of plan assets	0	0	$ 0
Components of Net Cost
Service cost	0	0
Interest cost	13	17
Expected return on plan assets	0	0
Amortization of transition amount	0	0
Recognized (gain) loss due to settlement	0	0
Recognized net actuarial loss	0	(31)
Benefit cost	13	$ (14)
Estimated Future Benefit Payments
FYE 01-31-2017	34
FYE 01-31-2018	32
FYE 01-31-2019	31
FYE 01-31-2020	29
FYE 01-31-2021	27
FYE 01-31-2022 to 2026	103
Total	$ 256
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	3.25%	3.25%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	3.25%	4.25%