Stock Repurchase Program (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2012
Stock Repurchase Program [Abstract]
Shares authorized for repurchase	5.5
Shares Repurchased	1.9
Weighted Average Price Of Shares Repurchased	$ 13.27
Fair Value Of Shares Repurchased	$ 25.0

The 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_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant