Retirement Plans (Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Change in Plan Assets
Company contributions	$ 2,400	$ 1,800	$ 2,000
Employee Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	32,069	32,840
Service cost	0	0
Interest cost	1,260	1,312
Participant contributions		0
Amendments		0
Actuarial losses (gains)	5,962	596
Plan settlement	0	(2,148)
Benefits paid	(1,583)	(531)
Benefit obligation at end of year	37,708	32,069
Change in Plan Assets
Fair value at beg. of year	18,168	16,875
Actual return on plan assets	2,172	2,122
Company contributions	2,430	1,850
Plan settlement	0	(2,148)
Benefits paid	(1,583)	(531)
Fair value at end of year	21,187	18,168
Unfunded status of the plan	(16,521)	(13,901)
Amounts Recognized in Statement of Financial Position
Current liabilities	0	0
Non-current liabilities	(16,521)	(13,901)
Accrued benefit cost	(16,521)	(13,901)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(16,521)	(13,901)
Accumulated other comp. loss (gain)	0	(14,235)
Net amount recognized	(16,521)	334
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	17,992	14,235
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	17,992	14,235
VIP Retirement Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	7,662	8,054
Service cost	0	0
Interest cost	350	330
Participant contributions		0
Amendments		0
Actuarial losses (gains)	2,636	(176)
Plan settlement		0
Benefits paid	(544)	(546)
Benefit obligation at end of year	10,104	7,662
Change in Plan Assets
Fair value at beg. of year	0	0
Actual return on plan assets	0	0
Company contributions	544	546
Plan settlement		0
Benefits paid	(544)	(546)
Fair value at end of year	0	0
Unfunded status of the plan	(10,104)	(7,662)
Amounts Recognized in Statement of Financial Position
Current liabilities	(613)	(584)
Non-current liabilities	(9,491)	(7,078)
Accrued benefit cost	(10,104)	(7,662)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(10,104)	(7,662)
Accumulated other comp. loss (gain)	(4,716)	(2,259)
Net amount recognized	(5,388)	(5,403)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	4,716	2,259
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	4,716	2,259
Directors Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	439	468
Service cost	0	0
Interest cost	17	18
Participant contributions	0	0
Amendments	0	0
Actuarial losses (gains)	8	(29)
Plan settlement		0
Benefits paid	(36)	(18)
Benefit obligation at end of year	428	439
Change in Plan Assets
Fair value at beg. of year	0	0
Actual return on plan assets	0	0
Company contributions	36	18
Plan settlement		0
Benefits paid	(36)	(18)
Fair value at end of year	0	0
Unfunded status of the plan	(428)	(439)
Amounts Recognized in Statement of Financial Position
Current liabilities	0	(66)
Non-current liabilities	(428)	(373)
Accrued benefit cost	(428)	(439)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(428)	(439)
Accumulated other comp. loss (gain)	0	75
Net amount recognized	(428)	(514)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	(37)	(75)
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	$ (37)	$ (75)