Earnings per Share (Details) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Basic and diluted weighted average common shares used in the earnings per share calculation
Basic weighted average common shares outstanding	12,742	12,665	12,766	12,646
Stock options	419	583	406	629
Unvested restricted stock	15	14	26	19
Total weighted average common share equivalents	434	597	432	648
Diluted weighted average common shares outstanding	12,742	13,262	13,198	13,294