Retirement Plans (Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Change in Plan Assets
Company contributions	$ 2,000	$ 1,900	$ 700
Amounts Recognized in Statement of Financial Position and Operations
Accumulated other comp. loss (gain)	16,000
Employee Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	29,583	27,080
Service cost	0	0
Interest cost	1,299	1,370
Participant contributions	0	0
Amendments	0	0
Actuarial losses (gains)	3,951	5,537
Plan settlement	(1,477)	(3,791)
Benefits paid	(516)	(613)
Benefit obligation at end of year	32,840	29,583
Change in Plan Assets
Fair value at beg. of year	14,808	17,737
Actual return on plan assets	2,035	(415)
Company contributions	2,025	1,890
Plan settlement	(1,477)	(3,791)
Benefits paid	(516)	(613)
Fair value at end of year	16,875	14,808
Unfunded status of the plan	(15,965)	(14,775)
Amounts Recognized in Statement of Financial Position
Current liabilities	0	0
Non-current liabilities	(15,965)	(14,775)
Accrued benefit cost	(15,965)	(14,775)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(15,965)	(14,775)
Accumulated other comp. loss (gain)	16,906	16,195
Net amount recognized	941	1,420
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	16,906	16,195
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	16,906	16,195
VIP Retirement Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	8,079	6,529
Service cost	0	0
Interest cost	352	379
Participant contributions	0	0
Amendments	0	0
Actuarial losses (gains)	175	1,622
Plan settlement	0	0
Benefits paid	(552)	(451)
Benefit obligation at end of year	8,054	8,079
Change in Plan Assets
Fair value at beg. of year	0	0
Actual return on plan assets	0	0
Company contributions	552	451
Plan settlement	0	0
Benefits paid	(552)	(451)
Fair value at end of year	0	0
Unfunded status of the plan	(8,054)	(8,079)
Amounts Recognized in Statement of Financial Position
Current liabilities	(570)	(495)
Non-current liabilities	(7,484)	(7,584)
Accrued benefit cost	(8,054)	(8,079)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(8,054)	(8,079)
Accumulated other comp. loss (gain)	2,656	1,571
Net amount recognized	(5,398)	(6,508)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	2,656	1,571
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	2,656	1,571
Directors Plan [Member]
Change in Benefit Obligation
Benefit obligation at beg. of year	480	450
Service cost	0	0
Interest cost	20	23
Participant contributions	0	0
Amendments	0	0
Actuarial losses (gains)	(23)	7
Plan settlement	0	0
Benefits paid	(9)	0
Benefit obligation at end of year	468	480
Change in Plan Assets
Fair value at beg. of year	0	0
Actual return on plan assets	0	0
Company contributions	9	0
Plan settlement	0	0
Benefits paid	(9)	0
Fair value at end of year	0	0
Unfunded status of the plan	(468)	(480)
Amounts Recognized in Statement of Financial Position
Current liabilities	(61)	(67)
Non-current liabilities	(407)	(413)
Accrued benefit cost	(468)	(480)
Amounts Recognized in Statement of Financial Position and Operations
Accrued benefit liability	(468)	(480)
Accumulated other comp. loss (gain)	(61)	(38)
Net amount recognized	(529)	(518)
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Unrecognized net actuarial loss (gain)	(61)	(38)
Unamortized prior service costs	0	0
Net initial asset recognition	0	0
Net periodic pension expense, included in AOCI	$ (61)	$ (38)