Shareholders' Equity (Narrative) (Details) (USD $)	3 Months Ended
Apr. 30, 2014
Equity [Abstract]
Common shares repurchased	$ 0

Amount of a stock repurchase plan authorized by an entity's Board of Directors.

No definition available.

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration