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Retirement Plans (Fair Value of Employee Plan Assets) (Details) - Combined Employee Retirement Plans [Member] - USD ($) | Jan. 31, 2023 | Jan. 31, 2022 | Jan. 31, 2021
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 23,628,000 | $ 26,429,000 | $ 23,972,000
Managed Investment Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 2,200,000 | 1,900,000 |
Fair Value, Inputs, Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 21,473,000 | 24,638,000 |
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 9,389,000 | 14,094,000 |
Fair Value, Inputs, Level 1 [Member] | Principal Money Market [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 233,000 | 523,000 |
Fair Value, Inputs, Level 1 [Member] | Federated Herme Gove Oblig |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 722,000 | 0 |
Fair Value, Inputs, Level 1 [Member] | PNC Government Money Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 0 | 204,000 |
Fair Value, Inputs, Level 1 [Member] | Vanguard INTM Term Investment Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 930,000 | 394,000 |
Fair Value, Inputs, Level 1 [Member] | Vanguard LT Investment [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 2,382,000 | 983,000 |
Fair Value, Inputs, Level 1 [Member] | Ishares Russell 2000 [Domain] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 718,000 | 1,457,000 |
Fair Value, Inputs, Level 1 [Member] | Ishares Russell MID-CAP Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 738,000 | 1,958,000 |
Fair Value, Inputs, Level 1 [Member] | Ishares Emerging Markets Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 748,000 | 1,091,000 |
Fair Value, Inputs, Level 1 [Member] | Ishares MCSI RAFE Fund [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 1,857,000 | 1,713,000 |
Fair Value, Inputs, Level 1 [Member] | Ishares S&P Index [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 483,000 | 781,000 |
Fair Value, Inputs, Level 1 [Member] | Vanguard INTM Term Treasury [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 2,352,000 | 404,000 |
Fair Value, Inputs, Level 1 [Member] | Vanguard LT Treasury [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 921,000 | $ 1,036,000 |

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