Basis of Presentation (Details)	Dec. 31, 2012 Location
Basis of Presentation (Textual) [Abstract]
Number of states company serves	50

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