Retirement Plans (Narrative) (Details)	6 Months Ended
	Jul. 31, 2016
VIP Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Rate of compensation increase	50.00%
Benefit Of Average Compensation Years	5 years
Other Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Director providing service to company	10 years