Stockholders' Equity (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended
Dec. 21, 2010
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 200.0

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