Basis of Consolidation Policy Additional Information (Details)	9 Months Ended
	Sep. 30, 2013
Maximum [Member]
Ownership Interest to be Held for Consolidation [Line Items]
Ownership Interest To Use Equity Method	50.00%
Ownership Interest To Use Cost Method	20.00%
Minimum [Member]
Ownership Interest to be Held for Consolidation [Line Items]
Ownership Interest to be Held for Consolidation	50.00%
Ownership Interest to be Held for Consolidation - Noncontrolling Interests	50.00%