Earnings (Loss) Per Share (Additional Disclosures) (Details)	Dec. 31, 2012	Feb. 11, 2008
Earnings Per Share [Abstract]
Common stock included in share lending agreement	3,800,000	3,800,000

The number of shares issued in connection with an own-share lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 2A

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=7656903&loc=SL6757479-112611

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