Retirement Plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Amortization of prior service cost (credit)	$ 795	$ 955
Total recognized in other Comprehensive Income	(217)	(2,135)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	9,000
Combined Employee Retirement Plans [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss (gain)	1,039	(2,447)
Prior service cost	0	0
Amortization of (loss) gain	(1,333)	(955)
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	(294)	(3,402)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	0	0
Net actuarial loss (gain)	706	692
Net periodic pension cost	706	692
Projected benefit obligation	36,299	40,181	$ 39,761
Accumulated benefit obligation	36,299	40,181
Fair value of plan assets	23,527	27,259	$ 22,911
Components of Net Cost
Service cost	0	0
Interest cost	1,459	1,593
Expected return on plan assets	(1,535)	(1,367)
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	1,333	955
Benefit cost	1,257	$ 1,181
Estimated Future Benefit Payments
FYE 01-31-2020	6,022
FYE 01-31-2021	2,171
FYE 01-31-2022	2,151
FYE 01-31-2023	2,087
FYE 01-31-2024	2,085
FYE 01-31-2025 to 2029	10,524
Total	$ 25,040
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	4.25%	4.25%
Expected return on plan assets	6.50%	6.50%
Minimum [Member] \| Combined Employee Retirement Plans [Member]
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	3.75%	3.75%
Maximum [Member] \| Combined Employee Retirement Plans [Member]
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	4.10%	4.00%

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

Name:	us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).