Other Income (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Apr. 30, 2014	Apr. 30, 2013	Jan. 31, 2014
Other Income And Expenses [Abstract]
Pre-tax gain on the sale of a building		$ 1,500	$ 1,526
Proceeds from asset held for sale	$ 2,200		$ 2,196

The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfPropertyHeldForSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration