Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified				9 Months Ended
	Jun. 21, 2011 Room Minute sqft ac	Sep. 03, 2008 ac mi	Sep. 30, 2011 Nashville Hockey Club [Member]	Sep. 30, 2011 Corporate Joint Venture [Member]
Commitments and Contingencies (Additional) (Textual) [Abstract]
Maximum potential amount liable under contribution agreement			$ 15.0	$ 23.8
Total debt subject to guarantees				121.2
Commitments and Contingencies (Textual) [Abstract]
Distance from downtown Phoenix of land under land purchase agreement		30
Distance to land under agreement	25
Amount of real estate property under purchase agreement within 3200 acre Mesa proving grounds		100
Number of acres to develop a resort and convention hotel in Aurora	85
Project expected cost approximately	$ 800
Expected guest rooms at resort and convention development.	1,500
Expected exhibition and meeting space at resort and convention development, in sq ft	400,000