Retirement Plans (Pension Plans, Narrative) (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability for Future Policy Benefits, Life	$ 9,486,000	$ 9,462,000
Restructuring expense	287,000	1,408,000	760,000
Company contributions	2,400,000	1,800,000	2,000,000
Benefit payments	580,000	564,000	561,000
Accumulated other comprehensive loss	22,700,000
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	20,200,000
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	5,400,000		2,000,000
Company contributions	2,430,000	1,850,000
Accumulated other comprehensive loss net of tax	0	14,235,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(4,893,000)	407,000
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	0	0
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	3,311,000	3,238,000
Liability increase for pension obligations	1,700,000		300,000
Company contributions	544,000	546,000
Accumulated other comprehensive loss net of tax	4,716,000	2,259,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(2,636,000)	176,000
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	0	0
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	20,000		10,000
Company contributions	36,000	18,000
Accumulated other comprehensive loss net of tax	0	(75,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	(8,000)	29,000
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax	0	0
Employee Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Restructuring expense			760,000
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	14.00%	12.00%
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%
Scenario, Forecast [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated contributions to qualified pension plans for 2015				2,300,000
Estimated future contributions to non-qualified plans for 2015				$ 664,000