Retirement Plans (Life Insurance) (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Liability for Future Policy Benefits, Life	$ 9,189,000	$ 9,391,000
Life Insurance, Corporate or Bank Owned, Amount	2,600,000
Liability beginning of year	2,166,000	2,388,000
Accretion expense	68,000	78,000
Present value of death benefits paid	(50,000)	(300,000)
Liability end of year	2,184,000	2,166,000
Cash surrender value	2,231,000	2,555,000
Death benefits received from life insurance policy	$ 4,748,000	$ 4,951,000