Retirement Plans (Pension Plans, Narrative) (Details) (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Restructuring expense	$ 0	$ 4,570,000	$ 0
Company contributions	2,000,000	1,900,000	700,000
Estimated contributions to plans for 2013	1,600,000
Benefit payments	561,000	451,000	458,000
Estimated future contributions to non-qualified plans for 2013	691,000
Accumulated other comprehensive loss	19,500,000
Accumulated other comprehensive loss net of tax	16,000,000
Employee Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of trust assets managed	70.00%
Liability increase for pension obligations	2,000,000	3,700,000
Company contributions	2,025,000	1,890,000
Accumulated other comprehensive loss net of tax	16,906,000	16,195,000
VIP Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit of average compensation	50.00%
Benefit of average compensation period	5 years
Cash surrender value	3,008,000	2,973,000
Liability increase for pension obligations	300,000	1,400,000
Company contributions	552,000	451,000
Accumulated other comprehensive loss net of tax	2,656,000	1,571,000
Directors Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Director years of service	10 years
Liability increase for pension obligations	10,000	26,000
Company contributions	9,000	0
Accumulated other comprehensive loss net of tax	(61,000)	(38,000)
Employee Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Restructuring expense	$ 760,000	$ 2,000,000
Common Stock [Member] | Employee Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset allocation target	80.00%
Debt Securities [Member] | Employee Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset allocation target	20.00%
Short-term investment funds	8.00%	6.00%
Large Cap Stock [Member] | Employee Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset allocation target	80.00%
Small Cap Stock [Member] | Employee Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset allocation target	30.00%
International Stock [Member] | Employee Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Long-term asset allocation target	30.00%