Commitments and Contingencies Legal Narrative (Details) (USD $)	1 Months Ended
	May 31, 2010 Opry Mills Mall Limited Partnership [Member]	Dec. 31, 2012 Mazeikiu Nafta [Member]
Loss Contingencies [Line Items]
Value of damages sought	$ 200,000,000	$ 125,000,000
Amount of coverage for damages contended by the insurers	50,000,000
Difference amount of damages sought by the client	$ 150,000,000