Retirement Plans (Pension Plans, Narrative) (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability for Future Policy Benefits, Life		$ 9,391,000	$ 9,486,000
Restructuring expense		0	287,000	$ 1,408,000
Company contributions		1,600,000	2,400,000	1,800,000
Benefit payments		591,000	580,000	$ 564,000
Accumulated other comprehensive loss		16,800,000
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax		$ 14,300,000
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
Company contributions		$ 1,575,000	2,430,000
Accumulated other comprehensive loss net of tax		13,889,000	17,992,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax		1,986,000	(4,893,000)
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		$ 3,462,000	3,311,000
Liability increase for pension obligations			1,700,000
Company contributions		537,000	544,000
Accumulated other comprehensive loss net of tax		3,023,000	4,716,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax		1,209,000	(2,636,000)
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
Company contributions		$ 54,000	36,000
Accumulated other comprehensive loss net of tax		(144,000)	(37,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax		107,000	(8,000)
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax		$ 0	$ 0
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		23.00%	14.00%
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 2017	$ 1,400,000
Estimated future contributions to non-qualified plans for 2017	$ 627,000