Segment Information - Equity in Earnings (Losses) of Unconsolidated Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in income (losses) of unconsolidated investments	$ 11,180	$ 6,328	$ (4,142)
Casinos
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in income (losses) of unconsolidated investments	10,929	8,900	(3,718)
TwinSpires
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in income (losses) of unconsolidated investments	0	(68)	(848)
Other Investments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in income (losses) of unconsolidated investments	$ 251	$ (2,504)	$ 424