Retirement Plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Components of Net Cost
Amortization of prior service cost				$ 0
Employee Plan [Member]
Components of Net Cost
Service cost	$ 0	$ 0	$ 0	0
Interest cost	324	315	648	630
Expected return on plan assets	(324)	(275)	(648)	(550)
Amortization of transition amount	0	0	0	0
Recognized (gain) loss due to curtailments	0	0	0	0
Amortization of prior service cost	0	0	0	0
Recognized net actuarial (gain) loss	375	284	750	568
Benefit cost	375	324	$ 750	648
VIP Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase			50.00%
Components of Net Cost
Service cost	0	0	$ 0	0
Interest cost	105	88	210	176
Expected return on plan assets	0	0	0	0
Amortization of transition amount	0	0	0	0
Recognized (gain) loss due to curtailments	0	0	0	0
Amortization of prior service cost	0	0	0	0
Recognized net actuarial (gain) loss	120	45	240	90
Benefit cost	225	133	$ 450	266
Directors Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Director Providing Service To Company			10 years
Components of Net Cost
Service cost	0	0	$ 0	0
Interest cost	3	4	6	8
Expected return on plan assets	0	0	0	0
Amortization of transition amount	0	0	0	0
Recognized (gain) loss due to curtailments	0	0	0	0
Amortization of prior service cost	0	0
Recognized net actuarial (gain) loss	0	(8)	0	(16)
Benefit cost	$ 3	$ (4)	$ 6	$ (8)