Retirement Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	322	325	966	975
Expected return on plan assets	(276)	(245)	(828)	(735)
Amortization of prior service cost	0	0	0	0
Pension settlement	800	0	800	0
Recognized net actuarial loss or (gain)	350	360	1,050	1,080
Net periodic pension cost (income)	1,196	440	1,988	1,320
VIP Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	83	88	249	264
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Pension settlement	0	0	0	0
Recognized net actuarial loss or (gain)	55	51	165	153
Net periodic pension cost (income)	138	139	414	417
Non-Employee Directors Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	4	5	12	15
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Pension settlement	0	0	0	0
Recognized net actuarial loss or (gain)	(3)	0	(9)	0
Net periodic pension cost (income)	$ 1	$ 5	$ 3	$ 15