Acquisitions and Dispositions	9 Months Ended
Sep. 30, 2012
Business Combinations [Abstract]
Acquisitions and Dispositions	(7) Acquisitions and Dispositions There were no material acquisitions or dispositions in the nine months ended September 30, 2012 and 2011, respectively.

The entire disclosure for business combinations, including leverage buyout transactions (as applicable), and divestitures. This may include a description of a business combination or divestiture (or series of individually immaterial business combinations or divestitures) completed during the period, including background, timing, and assets and liabilities recognized and reclassified or sold. This element does not include fixed asset sales and plant closings.

No definition available.

Name:	us-gaap_MergersAcquisitionsAndDispositionsDisclosuresTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration