Summary of Significant Accounting Policies - Pre-opening and Development Costs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pre-opening and Development Costs
Pre-opening and development costs	$ 89,009	$ 21,508	$ 8,817
Ameristar
Pre-opening and Development Costs
Pre-opening and development costs	85,300	0	0
Other
Pre-opening and Development Costs
Pre-opening and development costs	$ 3,700	$ 21,500	$ 8,800