Retirement Plans (Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Change in Plan Assets
Company contributions	$ 1,400	$ 1,600	$ 2,400
Employee Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	32,659	37,708
Service cost	0	0
Interest cost	1,184	1,147
Participant contributions		0
Amendments		0
Actuarial losses (gains)	(1,125)	(4,256)
Plan settlement	0	(1,380)
Benefits paid	(1,506)	(560)
Benefit obligation at end of year	31,212	32,659	37,708
Change in Plan Assets
Fair value at beg. of year	19,848	21,187
Actual return on plan assets	3,169	(974)
Company contributions	1,400	1,575
Settlements	0	(1,380)
Benefits paid	(1,506)	(560)
Fair value at end of year	22,911	19,848	21,187
Unfunded status of the plan	(8,301)	(12,811)
Amounts Recognized in Statement of Financial Position
Current liabilities	0	0
Non-current liabilities	(8,301)	(12,811)
Accrued benefit cost	(8,301)	(12,811)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(8,301)	(12,811)
Accumulated other comp. loss (gain)	9,567	13,889
Net amount recognized	1,266	1,078
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	9,567	13,889
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	9,567	13,889
VIP Retirement Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	8,701	10,104
Service cost	0	0
Interest cost	357	343
Participant contributions		0
Amendments		0
Actuarial losses (gains)	(266)	(1,209)
Plan settlement		0
Benefits paid	(500)	(537)
Benefit obligation at end of year	8,292	8,701	10,104
Change in Plan Assets
Fair value at beg. of year	0	0
Actual return on plan assets	0	0
Company contributions	500	537
Settlements		0
Benefits paid	(500)	(537)
Fair value at end of year	0	0	0
Unfunded status of the plan	(8,292)	(8,701)
Amounts Recognized in Statement of Financial Position
Current liabilities	(278)	(593)
Non-current liabilities	(8,014)	(8,108)
Accrued benefit cost	(8,292)	(8,701)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(8,292)	(8,701)
Accumulated other comp. loss (gain)	2,447	3,023
Net amount recognized	(5,845)	(5,678)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	2,447	3,023
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	2,447	3,023
Directors Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	280	428
Service cost	0	0
Interest cost	10	13
Participant contributions	0	0
Amendments	0	0
Actuarial losses (gains)	3	(107)
Plan settlement	0	0
Benefits paid	(36)	(54)
Benefit obligation at end of year	257	280	428
Change in Plan Assets
Fair value at beg. of year	0	0
Actual return on plan assets	0	0
Company contributions	36	54
Settlements	0	0
Benefits paid	(36)	(54)
Fair value at end of year	0	0	$ 0
Unfunded status of the plan	(257)	(280)
Amounts Recognized in Statement of Financial Position
Current liabilities	(34)	(34)
Non-current liabilities	(223)	(246)
Accrued benefit cost	(257)	(280)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(257)	(280)
Accumulated other comp. loss (gain)	0	(144)
Net amount recognized	(257)	(424)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	0	(144)
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	$ 0	$ (144)