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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% |

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- 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). + 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 (j) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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