Retirement Plans (Funded Status) (Details) - Combined Employee Retirement Plans [Member] - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Change in Benefit Obligation
Benefit obligation at beg. of year	$ 36,299	$ 40,181
Service cost	0	0
Interest cost	1,382	1,459
Participant contributions	0	0
Amendments	0	0
Actuarial losses (gains)	8,280	(2,044)
Plan settlement	0	(2,176)
Benefits paid	(2,669)	(1,121)
Benefit obligation at end of year	43,292	36,299
Change in Plan Assets
Fair value at beg. of year	23,527	27,259
Actual return on plan assets	1,806	(1,557)
Company contributions	990	1,122
Settlements	0	(2,176)
Benefits paid	(2,669)	(1,121)
Fair value at end of year	23,654	23,527
Unfunded status of the plans	(19,638)	(12,772)
Amounts Recognized in Statement of Financial Position
Current liabilities	(314)	(322)
Non-current liabilities	(19,324)	(12,450)
Accrued benefit cost	(19,638)	(12,772)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(19,638)	(12,772)
Accumulated other compensation loss	15,427	8,319
Net amount recognized	(4,211)	(4,453)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss	15,427	8,319
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	$ 15,427	$ 8,319