Common Stock Repurchase (Details) (Common Stock [Member], USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended
Jul. 25, 2012	Sep. 30, 2012
Equity, Class of Treasury Stock [Line Items]
Authorized amount under share repurchase program	$ 20.0
Remaining authorized repurchase amount		$ 20.0
Old Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Remaining shares available for repurchase	135,638

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant