Organization and Principles of Consolidation (Details Textual)	Sep. 30, 2012 Access_Line_Equivalents States
Organization and Principles of Consolidation (Textual) [Abstract]
Number of operating states	18
Number of Access Line Equivalents	1,300,000

The number of states the entity operates in as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant